RU42S-C-D24

**Relays & Sockets** 

**RU** 

## **RU Series Universal Relays** 

## **Key features:** 

- Full featured universal miniature relays 

- Designed with environment taken into consideration 

- Two terminal styles: plug-in and PCB mount 

- Non-polarized LED indicator 

- No internal wires, lead-free construction 

- Cadmium-free contacts 

- Mechanical flag indicator 

- Manual latching lever with color coding for AC or DC coil 

- Snap-on yellow marking plate; optional marking plates are available in four other colors 

- Maximum contact ratings: 10A (RU2), 6A (RU4), 3A (RU42) 

- UL Recognized, CSA Certified, EN Compliant 

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EN61810-1<br>**----- End of picture text -----**<br>


## **With Latching or Momentary Lever** 

## Latching and Momentary Lever 

Mechanical Indicator* The contact position can be confirmed through the five small windows. 

## Marking Plate 

Standard yellow marking plate is easily replaced with optional marking plates in four colors for easy identification of relays. 

Using the lever, operation can be checked without energizing the coil. The lever is color coded for AC and DC coils. 

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Latching Momentary<br>AC coil: Orange Red<br>DC coil: Green Blue<br>**----- End of picture text -----**<br>


## **In Normal Operation** 

## LED Indicator* 

Non-polarized green LED indicator is standard provision for plug-in terminal, latching lever types 

Note: Turn off the power to the relay coil when using the latching lever. After checking the operation, return the latching lever in the normal position. 

## **Standard (without lever)** 

AC/DC Color Marking For identification of AC or DC coils. 

AC coil: Yellow DC coil: Blue 

Mechanical Indicator* 

## Marking Plate 

## LED Indicator* 

Non-polarized green LED indicator is standard provision for plug-in terminal types. 

*Not available on PCB type. 

**AC Coil** 

**DC Coil** 

Coil Voltage Tape Color 24V AC White 100 to 110V AC Clear 110 to 120V AC Blue 200 to 220V AC Black 220 to 240V AC Red 24V DC Green 6V DC 12V DC Voltage marking on 48V DC yellow tape 110V DC | 

## Hipec 

**www.IDEC.com** 

790 

**Relays  & Sockets** 

**RU** 

## **Part Number Selection** 

|Contact<br>Model<br>DPDT (10A)<br>Standard|Standard<br>RU2S-C-0|Part Number<br>With Latching Lever<br>RU2S-0||With Momentary Lever<br>RU2S-M-0|Coil Voltage Code<br>**(Standard Stock in bold)**<br>A24,**A110**,**A220**<br>D6, D12,**D24**, D48, D110|
|---|---|---|---|---|---|
|With RC (AC coil only)|RU2S-CR-0|RU2S-R-0||RU2S-MR-0|A110, A220|
|With diode (DC coil only)|RU2S-CD-0|RU2S-D-0||RU2S-MD-0|D6, D12,**D24**, D48, D110|
|PCB<br>4PDT (6A)<br>Standard<br>With RC (AC coil only)|RU2V-NF-0<br>RU4S-C-0<br>RU4S-CR-0|—<br>RU4S-0<br>RU4S-R-0||—<br>RU4S-M-0<br>RU4S-MR-0|A24, A110, A220<br>D6, D12,**D24**, D48, D110<br>A24,**A110**,**A220**<br>D6, D12,**D24**, D48, D110<br>A110, A220|
|With diode (DC coil only)|RU4S-CD-0|RU4S-D-0||RU4S-MD-0|D6, D12, D24, D48, D110|
|PCB<br>4PDT Bifurcated (3A)<br>Standard<br>With RC (AC coil only)<br>With diode (DC coil only)|RU4V-NF-0<br>RU42S-C-0<br>RU42S-CR-0<br>RU42S-CD-0|—<br>RU42S-0<br>RU42S-R-0<br>RU42S-D-0||—<br>RU42S-M-0<br>RU42S-MR-0<br>RU42S-MD-0|A24,**A110**, A220<br>D6, D12,**D24**, D48, D110<br>A24, A110, A220<br>D6, D12,**D24**, D48, D110<br>A110, A220<br>D6, D12, D24, D48, D110|
|PCB|RU42V-NF-0|—||—|A24, A110, A220<br>D6, D12,**D24**, D48, D110|
|||||||
|1. Plug-in terminal models have an LED indicator and a mechanical indicator as standard.|||**Ordering Information**|**Ordering Information**|**Ordering Information**|



|1. Plug-in terminal models have an LED indicator and a mechanical indicator as standard.<br>2. PCB models do not have an LED indicator or a mechanical indicator.|1. Plug-in terminal models have an LED indicator and a mechanical indicator as standard.<br>2. PCB models do not have an LED indicator or a mechanical indicator.|1. Plug-in terminal models have an LED indicator and a mechanical indicator as standard.<br>2. PCB models do not have an LED indicator or a mechanical indicator.|1. Plug-in terminal models have an LED indicator and a mechanical indicator as standard.<br>2. PCB models do not have an LED indicator or a mechanical indicator.|1. Plug-in terminal models have an LED indicator and a mechanical indicator as standard.|1. Plug-in terminal models have an LED indicator and a mechanical indicator as standard.|||**Ordering Information**|**Ordering Information**|||
|---|---|---|---|---|---|---|---|---|---|---|---|
|||||||||When ordering, specify the Part No. and coil voltage code:||||
|||||||||(example)**RU2S-C       A110**<br>Part No.                         Coil Voltage Code<br>~~a~~||||
|**Coil Voltage Table**||||||||||||
|**Coil Voltage Code**|A24<br>A110<br>A220<br>D6<br>D12<br>D24<br>|<br>|<br>|<br>|<br>|||||||D48<br>D110<br>|<br>||||||
|**Coil Rating**|24V AC<br>~~a~~|110-120V AC|220-240V AC|6V DC|12V DC|24V DC||48V DC|110V DC|||



## **Coil Voltage Table** 

## **Sockets** 

|**Sockets**||||||
|---|---|---|---|---|---|
|Relays<br>RU2S (DPDT)|Spring Clamp<br>DIN Rail Mount<br>SU2S-11L|Standard DIN<br>Rail Mount<br>SM2S-05|Finger-safe DIN<br>Rail Mount<br>SM2S-05C|Panel Mount|PCB Mount<br>SM2S-61<br>SM2S-62|
|RU4S (4PDT)<br>RU42S (4PDT)|SU4S-11L|SY4S-05|SY4S-05C|SY4S-51|SY4S-61<br>SY4S-62|



**800-262-IDEC** (4332) • USA & Canada 

791 

**Relays & Sockets** 

**RU** 

## **Hold Down Springs & Clips** 

||Switches & Pilot Lights|Appearance<br>Item<br>Relay<br>For DIN<br>Mount Socket<br>For Through<br>Panel & PCB<br>Mount Socket<br>Pullover Wire<br>Spring<br>RU2S/RU4S/<br>RU42S<br>SY4S-02F1<br>SY4S-51F1|Appearance<br>Item<br>Relay<br>For DIN<br>Mount Socket<br>For Through<br>Panel & PCB<br>Mount Socket<br>Pullover Wire<br>Spring<br>RU2S/RU4S/<br>RU42S<br>SY4S-02F1<br>SY4S-51F1|||
|---|---|---|---|---|---|
|||||||
|||||||
||Signaling Lights|Leaf Spring<br>(side latch)<br>RU2S/RU4S/<br>RU42S<br>SFA-202*<br>SFA-302*<br>Leaf Spring<br>(top latch)<br>RU2S/RU4S/<br>RU42S<br>SFA-101*<br>SFA-301*<br>‘©<br>~~mi.~~||A|Note: Order 2 pieces for each relay|
|**Relays & Sockets**<br>~~’~~||**Accessories**<br>Name<br>Part Number<br>Color Code *<br>Marking Plate<br>RU9Z-P*<br>A (orange), G (green), S (blue), W (white), Y (yellow)<br>Specify a color code when ordering. The marking plate can be removed from the relay by inserting<br>a flat screwdriver under the marking plate.<br>**Specifications**<br>~~a~~<br>A||||



|Model (Contact)<br>~~a~~<br>~~nn~~<br>||RU2 (DPDT)<br>~~nn~~<br>~~ee~~<br>||RU4 (4PDT)<br>~~nn~~<br>~~ee~~|RU42 (4PDT-bifurcated)<br>~~nn~~|
|---|---|---|---|
|Contact Material<br>Contact Resistance1<br>Minimum<br>Applicable Load2<br>Operating Time3<br>Release Time3<br>Power Consumption<br>Insulation Resistance<br>Dielectric Strength<br>~~nn~~<br>|<br>|<br>|<br>~~—~~|<br>|<br>||Silver alloy<br>Silver (gold clad)<br>Silver-nickel (gold clad)<br>50 mΩ maximum<br>24V DC, 5 mA<br>(reference value)<br>1V DC, 1 mA<br>1V DC, 0.1 mA<br>20 ms maximum<br>20 ms maximum<br>AC: 1.1 to 1.4VA (50 Hz), 0.9 to 1.2VA (60 Hz)    DC: 0.9 to 1.0W<br>100MΩ minimum (500V DC megger)<br>Between contact and coil: 2500V AC, 1 minute<br>Between contacts of different poles:<br>2500V AC, 1 minute<br>2000V AC, 1 minute<br>Between contacts of the same pole: 1000V AC, 1 minute<br>Electrical: 1800 operations/h maximum<br>Mechanical: 18,000 operations/h maximum<br>Damage limits: 10 to 55 Hz, amplitude 0.5 mm<br>Operating extremes: 10 to 55 Hz, amplitude 0.5 mm<br>Damage limits: 1000 m/s2(100G)<br>Operating extremes: 150 m/s2(15G)<br>AC: 50,000,000 operations<br>DC: 100,000,000 operations<br>50,000,000 operations<br>See table on page 794<br>PCB model:  –55 to +70°C (no freezing)<br>Blade model:  –55 to +60°C (no freezing)<br>5 to 85% RH (no condensation)<br>Approx. 35g<br>~~nn~~<br>~~ee~~<br>|<br>|<br>|<br>|<br>~~—~~|<br>|<br>|<br>|<br>||||
|Operating Frequency<br>Vibration Resistance<br>Shock Resistance<br>Mechanical Life<br>Electrical Life4<br>Operating<br>Temperature5<br>Operating Humidity<br>Weight<br>|||||



   4. Contact Load and Electrical Life (at ambient temperature 20°C) 

1. Measured using 5V DC, 1A voltage drop method 

2. Measured at operating frequency of 120 operations/min (failure rate level P, reference value) 

      5. Measured at the rated voltage. 

3. Measured at the rated voltage (at 20°C), excluding contact bouncing; 

   - Release time of AC relays with RC: 25 ms maximum Release time of DC relays with diode: 40 ms maximum 

Hipec 

**www.IDEC.com** 

792 

**Relays  & Sockets** 

**RU** 

## **Accessories** 

|Item<br>Aluminum<br>DIN Rail<br>(1 meter length)<br>DIN Rail End<br>Stop<br>Replacement<br>Hold-Down<br>Spring Anchor|Appearance<br>Po|Use with<br>All DIN rail sockets<br>DIN rail<br>Horseshoe clip for DIN rail<br>sockets|Part No.<br>BNDN1000<br>BNL5<br>Y778-011|Remarks<br>The BNDN1000 is designed to accommodate DIN mount sockets.<br>Made of durable extruded aluminum, the BNDN1000 measures 0.413<br>(10.5mm) in height and 1.37 (35mm) in width (DIN standard). Standard<br>length is 39” (1,000mm).<br>9.1 mm wide.<br>For use on DIN rail mount socket when using pullover wire hold down<br>spring. 2 pieces included with each socket.|
|---|---|---|---|---|



## **Coil Ratings** 

|Rated Voltage (V)<br>~~lee~~|Rated Voltage (V)<br>~~lee~~|Coil<br>Voltage<br>Code<br>~~lee~~|Rated Current (mA)<br>±15% (at 20°C)|Rated Current (mA)<br>±15% (at 20°C)|Coil Resistance (Ω)<br>±10% (at 20°C)<br>~~lee~~|Operating Characteristics (values at 20°C)|Operating Characteristics (values at 20°C)|Operating Characteristics (values at 20°C)|
|---|---|---|---|---|---|---|---|---|
||||50 Hz<br>~~lee~~|60 Hz<br>~~lee~~||Maximum Continuous<br>Applied Voltage<br>~~lee~~<br>||Pickup Voltage<br>~~lee~~<br>|<br>~~foo~~|Dropout Voltage<br>~~lee~~<br>~~foo~~|
|AC<br>(50/60 Hz)<br>DC<br>~~lee~~|24<br>110-120<br>220-240<br>6<br>12<br>24<br>48<br>110<br>~~lee~~<br>pf<br>_|A24<br>A110<br>A220<br>D6<br>D12<br>D24<br>D48<br>D110<br>~~lee~~<br>pf<br>_|49.3<br>42.5<br>8.4-10.0<br>7.1-8.2<br>4.2-5.0<br>3.6-4.2<br>155<br>80<br>44.7<br>18<br>8.9<br>~~lee~~<br>pf<br>|<br>_||164<br>4,550<br>18,230<br>40<br>160<br>605<br>2,560<br>12,100<br>~~lee~~<br>|<br>||110%<br>110%<br>~~lee~~<br>|<br>|<br>||80% maximum<br>80% maximum<br>~~lee~~<br>|<br>~~foo~~<br>||30% minimum<br>10% minimum<br>~~lee~~<br>~~foo~~<br>||



1. The rated current includes the current of the LED indicator. 

## **Surge Suppressor Ratings** 

## **UL and c-UL Ratings** 

|**Surge Suppressor Ratings**|**Surge Suppressor Ratings**||**UL and c-UL Ratings**||||
|---|---|---|---|---|---|---|
|Model<br>Ratings<br>AC Coil<br>With RC<br>RC series circuit<br>R: 20 kΩ, C: 0.033 µF<br>DC Coil<br>With Diode<br>Diode reverse voltage: 1000V<br>Diode forward current: 1A<br>~~ff~~|||Voltage<br>Resistive<br>General Use<br>RU2<br>RU4<br>RU42<br>RU2<br>RU4<br>RU42<br>250V AC<br>10A<br>—<br>3A<br>—<br>6A<br>—<br>30V DC<br>10A<br>6A<br>3A<br>—<br>—<br>—<br>~~RBIss~~|Horse Power Rating<br>RU2<br>RU4<br>RU42<br>—<br>1/10HP<br>—<br>—<br>—<br>—|||
||||**CSA Ratings**<br>**TÜV Ratings**||||
|**Contact Ratings**|||Resistive<br>Resistive||Inductive||
|Maximum Contact Capacity<br>Contact<br>Continuous<br>Current<br>Allowable Contact Power<br>Voltage<br>(V)<br>Resistive Load<br>Inductive Load<br>DPDT<br>10A<br>2500VA AC<br>1250VA AC<br>250 AC<br>300W DC<br>150W DC<br>30 DC<br>4PDT<br>6A<br>1500VA AC<br>600VA AC<br>250 AC<br>180W DC<br>90W DC<br>30 DC<br>4PDT<br>bifurcated<br>3A<br>750VA AC<br>200VA AC<br>250 AC<br>90W DC<br>45W DC<br>30 DC<br>~~ns~~<br>~~ns~~<br>~~ee~~<br>~~ee~~ ee|Rated Load<br>Res. Load<br>10A<br>10A<br>6A<br>6A<br>3A<br>3A<br> ee|Rated Load<br>Ind. Load<br>5A<br>5A<br>0.8A<br>1.5A<br>0.8A<br>1.5A|Voltage<br>RU42<br>250V AC<br>3A<br>30V DC<br>3A<br>Voltage<br>RU2<br>RU4<br>RU42<br>RU2<br>250V AC<br>10A<br>6A<br>3A<br>5A<br>30V DC<br>10A<br>6A<br>3A<br>5A<br>~~a~~|||RU4<br>RU42<br>0.8A<br>0.8A<br>1.5A<br>1.5A|



1. On 4PDT relays, the maximum allowable total current of neighboring two poles is 6A. At the rated load, make sure that the total current of neighboring two poles does not exceed 6A (3A + 3A = 6A). 

2. Inductive load for the rated load — cos ø = 0.3, L/R = 7 ms 

**800-262-IDEC** (4332) • USA & Canada 

793 

**RU** 

## **Relays & Sockets** 

## **Socket Specifications** 

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Sockets Terminal Electrical Rating Wire Size Torque<br>SU2S-11L Spring clamp terminals 250V/10A 24-16 AWG —<br>SU4S-11L Spring clamp terminals 250V/6A (using RU4), 10A (using RU2) 24-16 AWG —<br>DIN Rail Mount  SM2S-05 M3 screw with captive wire clamp  300V, 10A Maximum up to 2–#14AWG 5.5 - 9in•lbs<br>Sockets SM2S-05C M3 screw with captive wire clamp, fingersafe  300V, 10A Maximum up to 2–#14AWG 5.5 - 9in•lbs<br>SY4S-05 M3 screw with captive wire clamp  300V, 7A (using RU4), 10A (using RU2) Maximum up to 2–#14AWG 5.5 - 9in•lbs<br>SY4S-05C M3 screw with captive wire clamp, fingersafe  300V, 7A (using RU4), 10A (using RU2) Maximum up to 2–#14AWG 5.5 - 9in•lbs<br>Through Panel  SY4S-51 Solder 300V, 7A — —<br>Mount Socket<br>SY4S-61 PCB mount 300V, 7A — —<br>PCB Mount Socket<br>SY4S-62 PCB mount 250V, 7A — —<br>Electrical Life Curves<br>RU2 (Resistive Load) RU4 (Resistive Load) RU42 (Resistive Load)<br>250V AC  250V AC  250V AC<br>30V DC   30V DC   30V DC<br>1000 110V DC   1000 110V DC   110V DC<br>ERE tH INE SN EET ooo<br>a SS a SN } INT SNP PT<br>YS l SN rN NIH LLC<br>100<br>100 |) 100 H+ HH rT PAE CSI AT<br>FE RN | I<br>ESE [EEE] ANHREE E EEe EH =eaEHS EE<br>PRT a | ek RN<br>I CC EINE<br>10 IaEeea ee|eeINIT 10 PUTINeeSSEeeee SeeeeNINee SeeneeS| 10 eI>=...Eeea a etONtHae<br>1 1 1<br>0.1 0.5  1  5  10 0.1 0.5  1  3  6 0.02 0.1 0.5 1 3 6<br>Load Current (A) Load Current (A) Load Current (A)<br>RU2 (Inductive Load) RU4 (Inductive Load) RU42 (Inductive Load)<br>250V AC/30V DC 250V AC  250V AC<br>110V DC 30V DC   30V DC<br>110V DC   110V DC<br>1000 [ NEN XT TTINTT ST TT yt AT TT TNT ST TT Ty<br>SS NeilN Sa RI Sa<br>100 NUTTEREN= |eeTT 100 P NTRINGN NdNTU CU 100 T SahelNINESIEtdTUT<br>FAS | oe ae<br>EE NCTE CN PNT<br>ee ST ST Ks HH SANE<br>10 NN) 10 PSNI.LIN SINTET 10 PINSLLU SINSLETLLY<br>se asi ee et SS SSS See ee ——__.——= =e<br>AC: cos ø = 0.3<br>=i DC: L/R = 7 ms ES FEE AC: cos ø = 0.3 a eee AC: cos ø = 0.3 Ceeet eee<br>DC: L/R = 7 ms DC: L/R = 7 ms<br>1 1 1<br>0.1 0.5  1  5  10 0.02 0.1 0.5 0.02 0.1 0.5<br>Load Current (A) Load Current (A) Load Current (A)<br>Maximum Switching Current<br>RU2 RU4 RU42 (Bifurcated)<br>AC resistive AC resistive AC resistive<br>AC inductive AC inductive AC inductive<br>10 ee (cos ø = 0.3) (cos o = 0.3) (cos @ = 0.3)<br>5 YT ESE ATE SE 5 Fee<br>1 Popea DC resistive NW fe =,8 TUTA VL EN roie<br>eeeea ee eeeeee eeee eeeeel 6SERREESBSTINSEA TITSy =,eeeae ESRLUIeee es eeEENNNNeee cmc<br>EEA NYNy 6=I [—]-}fern DC resistive CONF/T MI—HET HHH BG5 I—F-H[oer DC0Cresisresis tiv ee T NNHANHEH<br>A| 9 LOCO Tn > | LUTUVINTT<br>DC inductive<br>0.1 iil———Saet L/R = 7 ms UITSots oe SeTTeaeel| SLg 01 LlcR==FSUR=7ee pesca inavctveeeeeaesmspera [TETSRE(as eeEERE Cece Sot8 O41 ESELLPEeeDCEEUR inauetwe = 7inductiSSS ms  TI=eEYRESETTT T T<br>naa nt A<br>Fete [CEE] ee ee<br>10 30 100 250 500 10 30 100 250 500 10 30 100 250500<br>Load Voltage (V) Load Voltage (V) Load Voltaae (V)<br>Switches & Pilot Lights<br>Signaling Lights<br>Relays & Sockets<br>(¥ 10,000 operations)<br>(¥ 10,000 operations) (¥ 10,000 operations)<br>Timers<br>Contactors<br>(¥ 10,000 operations) (¥ 10,000 operations) (¥ 10,000 operations)<br>Terminal Blocks<br>Load Current (A)<br>Circuit Breakers<br>**----- End of picture text -----**<br>


**www.IDEC.com** 

794 

**Relays  & Sockets** 

**RU** 

## **Ambient Temperature vs. Temperature Rise Curves** 

## **RU2 (AC Coil, 50 Hz) RU2 (AC Coil, 60 Hz)** 

## **RU2 (DC Coil)** 

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120 120 120<br>110 PLE LLLL 110 PLEELLLL 110 a<br>100 ee 100 a 100 a<br>90 Sy 90 Sy 90 a<br>Load current<br>80 10A ¥ 2 poles 80 80<br>70 [a leee 70 a Load current 10A ¥ 2 poles 70 a Load current 10A ¥ 2 poles<br>60 SyeeFRETN 60 aycesTS 60 eonsPy TST<br>50 SSS Ee RS 50 es 50 a<br>40 Load current  40 40<br>30 SSS 5A ¥ 2 poles [F,S 30 SS Load current  ee 30 === Load current  3<br>20 e e No load current 20 7 5A ¥ 2 poles TESS 20 e 5A ¥ 2 poles a No load current<br>No load current<br>10 a 10 i n 10 2 s<br>a ee a oe tTa =<br>0 10 20 30 40 50 60 70 0 10 20 30 40 50 60 70 0 10 20 30 40 50 60 70<br>Ambient Temperature (C) Ambient Temperature (C) Ambient Temperature (C)<br>RU4/RU42 (AC Coil, 50 Hz) RU4/RU42 (AC Coil, 60 Hz) RU4/RU42 (DC Coil)<br>1201101009080 aasyee 1201101009080 asya 1201101009080 asya<br>Load current<br>7060 eos 6A ¥ 2 poles 7060 Ps Load current 6A ¥ 2 poles 7060 T Load current 6A ¥ 2 poles R<br>50 SeeSSS 50 pf— PeeTS 50 pfRoy ytSf [RS]<br>40 Load current  40 40<br>30 TSS 3A ¥ 4 poles . 30 SSS Load current  30 = Load current<br>20 ee PS No load current R s 20 SSS 3A ¥ 4 poles , 20 CT 3A ¥ 4 poles i No load current r :<br>No load current<br>10 a a ee 10 ea e P e s 10 TTP 2r =<br>0 10 20 30 40 50 60 70 0 10 20 30 40 50 60 70 0 10 20 30 40 50 60 70<br>Ambient Temperature (C) Ambient Temperature (C) Ambient Temperature (C)<br>Temperature Rise (C) Temperature Rise (C) Temperature Rise (C)<br>Temperature Rise (C) Temperature Rise (C) Temperature Rise (C)<br>**----- End of picture text -----**<br>


## **RU4/RU42 (AC Coil, 50 Hz)** 

The above temperature rise curves show the characteristics when 100% the rated coil voltage is applied. The heat resistance of the coil is 120°C. The slant dashed line indicates the allowable temperature rise for the coil at different ambient temperatures. Load current 6A x 2 poles is for the RU4 models only. 

**800-262-IDEC** (4332) • USA & Canada 

795 

**Relays & Sockets** 

**RU** 

**Internal Connection (View from Bottom) RU2S-* Standard RU2S-*R with RC** (1)12 (4)42 ape (5)14 ; (8)44 | \(5)14¢¢ (9)11 (12)41 nt. 

## **RU2S-*D With Diode** 

## **RU2V-NF-*** 

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(1)12 (4)42 ape (ae (1)12 (4)42<br>(5)14 ; (8)44 | \(5)14¢¢ (8)443 (5)14 fF (8)44 3<br>(9)11 (12)41 nt. (12)41 (9)11 (12)41<br>(13)A1 (14)A2 (13)A1 (14)A2<br>ro 7 = or : ° (14)A2<br>ace<br>24V AC/DC coil or less 24V DC coil or less<br>(1)12 (4)42 (1)12 (4)42<br>(5)14 (8)44 (5)14 (8)44<br>i3<br>(9)11 (12)41 (9)11 (12)41<br>(13)A1 (14)A2 (13)A1 (14)A2<br>7 +<br>Over 24V AC/DC coil  Over 24V DC coil<br>Signaling Lights<br>**----- End of picture text -----**<br>


## **RU4S-*/RU42S-* Standard** 

## **RU4S-*R/RU42S-*R With RC** 

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(1)12 (2)22 (3)32 (4)42 (1)12 (2)22 (3)32 (4)42<br>(5)14 (6)24 (7)34 (8)44 (5)14 (6)24 (7)34 (8)44<br>(9)11 af (10)21 ef (11)31 op (12)41 sf (9)11 op (10)21 ef (11)31 ap (12)41 sf<br>(13)A1 (14)A2 (13)A1 (14)A2<br>24V AC/DC coil or less<br>**----- End of picture text -----**<br>


## **RU4S-*D/RU42S-*D With Diode RU4V-NF-*/RU42V-NF-*** 

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(1)12 (2)22 (3)32 (4)42 (1)12 (2)22 (3)32 (4)42<br>(5)14 (6)24 (7)34 (8)44 (5)14 (6)24 (7)34 (8)44<br>(9)11 of (10)21 af (11)31 (12)41 ap ef (9)11 af (10)21 (11)31 ap (12)41 ef<br>(13)A1 (14)A2 (13)A1 (14)A2<br>24V DC coil or less<br>**----- End of picture text -----**<br>


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(1)12 (2)22 (3)32 (4)42<br>(5)14 (6)24 (7)34 (8)44<br>ap ef ap sf<br>(9)11 (10)21 (11)31 (12)41<br>(13)A1 f A (14)A2<br>Over 24V AC/DC coil<br>**----- End of picture text -----**<br>


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(1)12 (2)22 (3)32 (4)42<br>(5)14 (6)24 (7)34 (8)44<br>of ef op sf<br>(9)11 (10)21 (11)31 (12)41<br>(13)A1 (14)A2<br>Over 24V DC coil<br>**----- End of picture text -----**<br>


## **Dimensions (mm)** 

## **RU2S** 

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RU2V<br>**----- End of picture text -----**<br>


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Marking Plate<br>Removal Slot<br>Co)<br>J<br>ITT |<br>0.5 2.6<br>0oO oO ø1.2 ¥ 2.2 Hole<br>q o d 0 0 a 0<br>27.5<br>Marking plate removal slot is provided only on one side.<br>Insert a flat screwdriver into the slot to remove the marking<br>plate.<br>35.0<br>6.4<br>4 8 12 14<br>21.0<br>1 5 9 13<br>**----- End of picture text -----**<br>


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Marking Plate<br>Removal Slot<br>c—<br>|<br>TT 1 13.2<br>0.5 0.8<br>2.6<br>iB<br>BE<br>|<br>27.5<br>Mounting Hole Layout<br>aT 7.0<br>6.4<br>4.1 12.7<br>All dimensions in mm.<br>8-ø1 Holes<br>35.0<br>0.5<br>4.0<br>21.0<br>13.2<br>**----- End of picture text -----**<br>


**www.IDEC.com** 

796 

**Relays  & Sockets** 

**RU** 

## **Dimensions con’t (mm)** 

## **RU4S/RU42S** 

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RU4V/RU42V<br>**----- End of picture text -----**<br>


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Marking Plate<br>Removal Slot<br>TT Zl 3-4.4<br>0.5<br>+ 0.8<br>2.6<br>He BE fe<br>27.5<br>Mounting Hole Layout<br>7.0<br>6.4<br>4.1 12.7<br>ee<br>All dimensions in mm.<br>14-ø1 Holes<br>35.0<br>0.5<br>4.0<br>21.0<br>13.2<br>4.4<br>**----- End of picture text -----**<br>


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Marking Plate<br>Removal Slot Removal Slot<br>TIT TT<br>0.5<br>0.5 2.6<br>a +<br>6=—sE— ø1.2 × 2.2 Hole He BE fe<br>27.5 27.5<br>Marking plate removal slot is provided only on one side.  Mounting Hole Layout<br>Insert a flat screwdriver into the slot to remove the marking  7.0<br>plate.<br>35.0<br>6.4<br>4 8 12 14<br>3 7 11<br>21.0 2 6 10<br>1 5 9 13 21.0<br>**----- End of picture text -----**<br>


## **Spring Clamp DIN Rail Mount Sockets** 

**SU2S-11L** 

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31 31<br>Terminal Arrangement Terminal Arrangement<br>12 9 12 11 10 9<br>8 5 8 7 6 5<br>2-ø3.2  2-ø3.2<br>24.0 Mounting Holes 4 1 24.0 Mounting Holes 4 3 2 1<br>14 13 14 13<br>3238.3 Ring terminals cannot be used. (Top View) 3238.3 Ring terminals cannot be used. (Top View)<br>80 80<br>37.5 37.5<br>28.8 28.8<br>4.4 4.4<br>**----- End of picture text -----**<br>


## **Standard DIN Rail Mount Sockets** 

**SM2S-05** 

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30 6 M3 TerminalScrew 31.518 DIN Rail(BNDN) Terminal Arrangement 30 6 M3 TerminalScrew 31.518 DIN Rail(BNDN) 2-ø4.2 Mounting Holes Terminal Arrangement 8 7 6 5<br>2-ø4.2 Mounting Holes(or M4 Tapped Holes) 48 15 (or M4 Tapped Holes) 4 3 2 1<br>26<br>a 26 ly yo ce<br>4 max. 4.8 min. 1214 139 4 max. 4.8 min. 1214 11 10 139<br>ers ale Se ae<br>18.5 (Top View) 18.5 5.9 max. (Top View)<br>26 25 5.9 max. 26 25 ø3.2 min.<br>ø3.2 min.<br>YER “Pe e<br>0.7 0.7<br>62 45 62 45<br>4.2 4.2<br>Terminal Blocks<br>3 3<br>**----- End of picture text -----**<br>


**800-262-IDEC** (4332) • USA & Canada 

797 

**Relays & Sockets** 

**RU** 

## **Dimensions con’t (mm)** 

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Dimensions con’t (mm)<br> Finger-safe DIN Rail Mount Sockets<br>SM2S-05C SY4S-05C<br>30 30 35.5<br>6 M3 Terminal 3525.5 DIN Rail(BNDN) 6 M3 TerminalScrew 25 DIN Rail(BNDN) Terminal Arrangement<br>Screw Terminal Arrangement<br>Boog 18 2-ø4.2 Mounting Holes(or M4 Tapped Holes) 8 _ 5 olotote 18 2-ø4.2 Mounting Holes(or M4 Tapped Holes) pede 48 73 62 15<br>4 1<br>26 26<br>14 13<br>14 13 12 11 10 9<br>Ring terminals  12 9 Ring terminals  (Top View)<br>26 18.2 cannot be used. (Top View) 26 18.2 cannot be used.<br>Bec 29 o B its 29 3<br>PCB Mount Sockets<br>SM2S-61 SM2S-62<br>Terminal Arrangement 13.2 13.8 min. 8.2 min.**<br>Terminal Arrangement<br>1 4<br>5 8 1 4<br>9 12 5 8<br>13 14 9 12<br>13 14<br>27 113 (Bottom View) 9-ø2 holes 21.2 3 11 (Bottom View) 9-ø2 holes<br>15 15<br>(Tolerance 0.1)<br>1.5 * 19.2 min. when using (Tolerance 0.1)<br>21.2    hold-down springs 1.5 **13.2 min. when using a hold-down spring for* 17.2 min. when using a hold-down spring.<br>the relay with check button.<br>SY4S-61 SY4S-62<br>13.2 13.8 min. 8.2 min.**<br>8.8<br>4.4<br>Terminal Arrangement Terminal Arrangement<br>195 1026 1137 1248 13195 1026 1137 121448<br>13 14<br>27 3 (Bottom View) 21.2 3 11 (Bottom View) 15-ø2 holes<br>11 15-ø2 holes 15<br>15 (Tolerance 0.1)<br>1.5 * 19.2 min. when using (Tolerance 0.1) 1.5 * 17.2 min. when using a hold-down spring.<br>21.2    hold-down springs * *13.2 min. when using a hold-down spring for<br>the relay with check button<br>Through Panel Mount Socket<br>SY4S-51<br>Panel Thickness:1 to 2 [27 (N–1) + 21.4] +0.50<br>Terminal Arrangement<br>1 2 3 4<br>oS@o fog 5 6 g 7 g! 8 Po<br>9 10 11 12<br>13 14<br>27 3 (Bottom View) N: No. of sockets mounted<br>11<br>18.7<br>ea fe a {Ee<br>2.4 * 10.4 min. when using hold-down springs<br>21.2<br>13.2<br>13.2<br>8.8<br>4.4<br>ø5.5 ø5.5<br>Switches & Pilot Lights<br>4.2 4.2<br>64 46 64 46<br>1.6 2 1.6 2<br>Signaling Lights<br>4.1<br>31 25.4 10.4 4.1 9 29 0.3 16.8 10.4 9<br>16.8<br>0.3 1.4<br>Relays & Sockets *<br>14.2 min.*  1.4<br>12.2 min.<br>Timers<br>10.4 4.1 4.1<br>31 25.4 16.8 9 29 0.3 16.8 10.4 9<br>1.4<br>0.3 14.2 min.*<br>1.4 12.2 min.*<br>Contactors<br>31 25.4 0.2+25.60<br>0.3<br>Terminal Blocks 5.4 min.*<br>**----- End of picture text -----**<br>


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**www.IDEC.com** 

798 

**Relays  & Sockets** 

**Operating Instructions** 

## **Operating Instructions** 

## **Driving Circuit for Relays** 

## **Protection for Relay Contacts** 

1. To ensure correct relay operation, apply rated voltage to the relay coil. 

1. The contact ratings show maximum values. Make sure that these values are not exceeded. When an inrush current flows through the load, the contact may become welded. If this is the case, connect a contact protection circuit, such as a current limiting resistor. 

## 2. Input voltage for the DC coil: 

A complete DC voltage is best for the coil power to make sure of stable relay operation. When using a power supply containing a ripple voltage, suppress the ripple factor within 5%. When power is supplied through a rectification circuit, the relay operating characteristics, such as pickup voltage and dropout voltage, depend on the ripple factor. Connect a smoothing capacitor for better operating characteristics as shown below. 

2. Contact protection circuit: 

When switching an inductive load, arcing causes carbides to form on the contacts, resulting in increased contact resistance. In consideration of contact reliability, contact life, and noise suppression, use of a surge absorbing circuit is recommended. Note that the release time of the load becomes slightly longer. Check the operation using the actual load. Incorrect use of a contact protection circuit will adversely affect switching characteristics. Four typical examples of contact protection circuits are shown in the following table: examples of contact protection circuits are shown in the following table: 

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Pulsation<br>longer. Check the operation using the actual load. Incorrect use of a contact<br>SmoothingCapacitor Emin Emax Emean DC protection circuit will adversely affect switching characteristics. Four typical examples of contact protection circuits are shown in the following table:<br>+<br>– R Relay Ripple Factor (%) Emax –EmeanEmin ¥ 100% This protection circuit can be used when the load<br>Emax = Maximum of pulsating current impedance is smaller than the RC impedance in an<br>EminEmean = DC mean value= Minimum of pulsating current Power C R Ind. Load AC load power circuit.• R: Resistor of approximately the same resistance<br>3. Leakage current while relay is off:  value as the load<br>When driving an element at the same time as the relay operation, special  • C:0.1 to 1 µF<br>consideration is needed for the circuit design. As shown in the incorrect  This protection circuit can be used for both AC and<br>circuit below, leakage current (Io) flows through the relay coil while the relay  DC load power circuits.<br>is off. Leakage current causes coil release failure or adversely affects the  R: Resistor of approximately the same resistance<br>value as the load<br>vibration resistance and shock resistance. Design a circuit as shown in the<br>fro, Foo I C: 0.1 to 1 µF<br>correct example.<br>This protection circuit can be used for DC load power<br> Incorrect  Correct  + circuits. Use a diode with the following ratings.<br>R TE R Power D Ind. Load Reverse withstand voltage: Power voltage of the<br>– load circuit x 10<br>Io Forward current: More than the load current<br>=a =ee (CE<br>This protection circuit can be used for both AC and<br>DC load power circuits.<br>4. Surge suppression for transistor driving circuits:<br>For a best result, when using a power voltage of 24<br>When the relay coil is turned off, a high-voltage pulse is generated, causing a  Power Ind. Load<br>to 48V AC/DC, connect a varistor across the load.<br>transistor to deteriorate and sometimes to break. Be sure to connect a diode<br>tt When using a power voltage of 100 to 240V AC/DC,<br>to suppress the back electromotive force. Then, the coil release time becomes  connect a varistor across the contacts.<br>slightly longer. To shorten the coil release time, connect a Zener diode<br>between the collector and emitter of the transistor. Select a Zener diode with  3. Do not use a contact protection circuit as shown below:<br>a Zener voltage slightly higher than the power voltage.<br>This protection circuit is very effective in arc suppression when<br>Back emf<br>suppressing diode opening the contacts. But, the capacitor is charged while the<br>+– R Relay PowerC Load contacts are opened. When the contacts are closed, the capacitor is discharged through the contacts, increasing the possibility of contact welding.<br>This protection circuit is very effective in arc suppression when<br>C Load opening the contacts. But, when the contacts are closed, a current<br>B S 8 Power flows to charge the capacitor, causing contact welding.<br>RC<br>Diode<br>Varistor<br>Varistor<br>**----- End of picture text -----**<br>


Generally, switching a DC inductive load is more difficult than switching a DC resistive load. Using an appropriate arc suppressor, however, will improve the switching characteristics of a DC inductive load. 

## **Soldering** 

1. When soldering the relay terminals, use a soldering iron of 30 to 60W, and quickly complete soldering (within approximately 3 seconds). 

2. Use a non-corrosive rosin flux. 

**800-262-IDEC** (4332) • USA & Canada 

817 

**Relays & Sockets** 

**Operating Instructions** 

## **Operating Instructions con’t** 

## **Other Precautions** 

   2. UL and CSA ratings may differ from product rated values determined by IDEC. 

1. General notice: 

- To maintain the initial characteristics, do not drop or shock the relay. 

   3. Do not use relays in the vicinity of strong magnetic field, as this may affect relay operation. 

- The relay cover cannot be removed from the base during normal operation. To maintain the initial characteristics, do not remove the relay cover. 

Use the relay in environments free from condensation, dust, sulfur dioxide (SO2), and hydrogen sulfide (H2S). 

Make sure that the coil voltage does not exceed applicable coil voltage range. 

## **Safety Precautions** 

- Turn off the power to the relay before starting installation, removal, wiring, maintenance, and inspection of the relays. Failure to turn power off may cause electrical shock or fire hazard. 

- Observe specifications and rated values, otherwise electrical shock or fire hazard may be caused. 

- Use wires of the proper size to meet voltage and current requirements. Tighten the terminal screws on the relay socket to the proper tightening torque. 

- Surge absorbing elements on AC relays with RC or DC relays with diode are provided to absorb the back electromotive force generated by the coil. When the relay is subject to an excessive external surge voltage, the surge absorbing element may be damaged. Add another surge absorbing provision to the relay to prevent damage. 

## **Precautions for the RU Relays** 

- Before operating the latching lever of the RU relay, turn off the power to the RU relay. After checking the circuit, return the latching lever to the original position. 

- Do not use the latching lever as a switch. The durability of the latching lever is a minimum of 100 operations. 

- When using DC loads on 4PDT relays, apply a positive voltage to terminals of neighboring poles and a negative voltage to the other terminals of neighboring poles to prevent the possibility of short circuits. 

- DC relays with a diode have a polarity in the coil terminals. Apply the DC voltage to the correct terminals. 

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818