MK 7850N.82/200 AC/DC12-240V

**Time control technique** 

**Multifunction relay MK 7850N/200 multitimer** 

## 

- According to IEC/EN 61 812-1 

- 8 functions settable via rotational switch: 

- Delay on energisation (AV) 

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A 0239280<br>**----- End of picture text -----**<br>


- Fleeting on make (EW) 

- Delayed pulse (IE) 

- Flasher, start with pulse (BI) 

- Delay on de-energisation (RV) 

- Pulse forming function (IF) 

- Fleeting on break (AW) 

- Delay on energisation and de-energisation (AV / RV) 

- 8 time ranges from 0,02 s to 300 h selectable via rotational switches 

- Voltage range AC/DC 12 ... 240 V 

- With time interruption / time adding input for all functions 

- Adjustment aid for quick setting of long time values 

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MK 7850N/200<br>**----- End of picture text -----**<br>


- Suitable for 2-wire proximity sensor control 

- 2 changeover contacts, one programmable as instantaneous contact 

- LED indicators for operation, contact position and time delay 

## **Options with plugable terminal blocks** 

- Wire connection: also 2 x 1.5 mm[2] stranded ferruled, or 2 x 2.5 mm[2] solid DIN 46 228-1/-2/-3/-4 

- as option with plugable terminal blocks for easy exchange of devices 

- with screw terminals 

- or with cage clamp terminals 

- 22,5 mm width 

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Terminal block<br>with cage clamp terminals<br>(PC / plugin cageclamp)<br>**----- End of picture text -----**<br>


MK 7850N/500: as MK 7850N/200 but with 

- 2 additional functions: 

- Cyclic timer, start with break (TP) 

- Fleeting on make and break (EW / AW) 

- second time setting t2 for functions - Cyclic timer, start with pulse (TI) or break (TP), based on the separate setting of pulse and break time the flasher function can be used as cyclic timer 

- Fleeting on make and break (EW/AW) 

- Delay on energisation and de-energisation (AV / RV) 

- Delay pulse (IE) and setting of pulse length 

- Connection facility for 2 external potentiometers 

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MK _ _ _ _N P_ Terminal block<br>with screw terminals<br>(PS / plugin screw)<br>**----- End of picture text -----**<br>


## **Notes** 

## **Approvals and marking** 

* ED Canada / USA 

* see variants 

Removing the terminal blocks with cage clamp terminals 

1. The unit has to be disconnected. 

2. Insert a screwdriver in the side recess of the front plate. 

## **Application** 

Time-dependent controllers 

3. Turn the screwdriver to the right and left. 

## **Indicators** 

4. Please note that the terminal blocks can only be mounted on the **Indicators** belonging plug in terminations. green LED: on when voltage connected yellow LED "R/t": shows status of output relay and time delay: 

ey -Continuously off: output relay not active; no time delay 

-Continuously on: output relay active; no time delay 

-Flashing (short on, long off) output relay not active; time delay 

-Flashing (long on, short off) output relay active; 

aN time delay 

» 

~~EEE~~ All technical data in this list relate to the state at the moment of edition. We reserve the right for technical improvements and changes at any time. 1 MK 7850N/200 / 11.09.06 e 

MK 7850N/200 / 11.09.06 e ~~ET~~ 

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**Function diagram** 

## **Function diagram** 

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UH UN<br>A1-A2<br>0<br>USt UN<br>B1-A2<br>0<br>ta tb tc td<br>15-18<br>1 AV t t=ta+tb+tc<br>15-16<br>2 EW t t=ta+tb+tc 15-18<br>15-16<br>3 IE t 0,5s t=ta+tb+tc 0,5s + td 15-18<br>15-16<br>te tf<br>4 BI t t t=ta+tb+tc t=te + tf 15-18<br>15-16<br>UH UN<br>A1-A2<br>0<br>USt UN<br>B1-A2<br>0<br>15-18<br>5 RV t t t<br>15-16<br>6 IF t t t t 15-18<br>15-16<br>7 AW t t t 15-18<br>15-16<br>8 AV/RV t t t t 15-18<br>15-16<br>M8290<br>position function switch<br>**----- End of picture text -----**<br>


MK 7850N/200 � ... � = position of function switch 

- AV = Delay on energisation � RV = Delay on de-energisation 

- � EW = Fleeting on make � IF = Pulse forming function � IE = Delayed pulse � AW = Fleeting on break � BI = Flasher, � AV/RV = Delay on energisation and start with pulse de-energisation 

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UH UN<br>A1-A2<br>0<br>USt UN<br>B1-A2<br>0<br>ta tb tc td<br>15-18<br>1 AV t1 t1=ta+tb+tc<br>15-16<br>2 EW t1 t1=ta+tb+tc 15-18<br>15-16<br>IE t1 0,5s 15-18<br>S1: A* t1=ta+tb+tc 0,5s + td 15-16<br>3 te tf<br>IE t1 t2 15-18<br>S1: B* t1=ta+tb+tc t2=te+tf 15-16<br>TI t1 t2 t1 15-18<br>S1: A* t1=ta+tb+tc t2=te+tf 15-16<br>4 tg th ti<br>TP t2 t1 t2 15-18<br>S1: B* t2=ta+tb+tg t1=th+ti 15-16<br>UH UN<br>A1-A2<br>0<br>USt UN<br>B1-A2<br>0<br>5 RV t1 t1 t1 15-18<br>15-16<br>6 IF t1 t1 t1 t1 15-18<br>15-16<br>AW t1 t1 t1 15-18<br>S1: A* 15-16<br>7<br>EW/AW t2 t1 t2 t1 t2 15-18<br>S1: B* 15-16<br>8 AV/RV t1 t2 t1 t2 15-18<br>15-16<br>M8291<br>position function switch<br>**----- End of picture text -----**<br>


*) A and B indicate the position of function slide switch S1 

MK 7850N/500 �... � = position of function switch 

� AV = Delay on energisation � RV = Delay on de-energisation � EW = Fleeting on make � IF = Pulse forming function � IE = Delayed pulse � AW = Fleeting on break S1 in positon A: S1 in position A t1: adjustable, t2 = 0,5 s fixed EW/AW = Fleeting on make S1 in position B: and break t1 and t2 adjustable S1 in position B � TI = Cyclic timer, � AV/RV = Delay on energisation start with pulse and de-energisation S1 in position A TP = Cyclic timer, start with break S1 in position B 

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**Circuit diagrams** 

## **Notes** 

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t<br>Z1 Z2<br>25 B1 25 B1<br>A1 15 A1 15<br>21 (+) 21 (+)<br>X3 Z1 Z2 X3<br>A1 B1 15 25 A1 B1 Z1 15 25<br>21 21<br>26 28 26 28<br>A2 16 18 22 24 A2 Z2 16 18 22 24<br>26 28 26 28<br>X1 X2 X1 X2<br>22 24 M8100_a 22 24 M8676_a<br>16 18 A2 16 18 A2<br>MK 7850N.82/200 MK 7850N.82/300<br>t1<br>Z1<br>Z2<br>Z3<br>t2<br>25 B1<br>A1 15<br>21 (+)<br>Z1 Z2 Z3 X3<br>A1 B1 Z1 15 25<br>21<br>26 28<br>A2 Z2 Z3 16 18 22 24<br>26 28<br>X1 X2<br>22 24 M8101_a<br>16 18 A2<br>**----- End of picture text -----**<br>


MK 7850N.82/200 MK 7850N.82/300 

MK 7850N.82/500 

## **Notes** 

## **Control of A1-A2 with proximity sensors** 

The input can be controlled by DC 3 wire or AC/DC 2 wire proximity sensors. For operating voltage > 24 V and usage of sensors without built-in short circuit protection a protection resistor on A1 is recommendend to reduce the inrush current. The dimension is as follows: 

Rv ≈ operating voltage / max. switching current of sensor 

The series resistor must not be selected higher than necessary. Max. values are: Operating voltage: 48 V 60 V 110 V 230 V Series resistor Rv max: 270 Ω 390 Ω 680 Ω 1,8 kΩ   (1 W) 

## **Instantaneous contact** 

By external wire links the output function of the device can be altered from 2 delayed contacts to 1 delayed **and** 1 instantaneous contact. The instantaneous contact switches when the operating voltage is connected. To terminals X1 and X2 no other voltage potentials must be connected, as the unit might be damaged. 

## **Adjustment assistance** 

The flashing period of the yellow LED is 1 s ± 4 % and can be used to adjust the time. Especially on the lower end of scale and for long times it is suitable as the multiplication factors between the different time ranges are exact without tolerance. Example: The required time is 40 min. It has to be adjusted within range 3 ... 300 min.The time check takes too long as several timing cycles would be necessary for a precise value. For faster adjustment the setting is made to 0.03 ... 3 min. On this range the potentiometer should be set to 0.4 min (= 24 sec.). With the right potentiometer setting the LED must show 24 flashing cycles. After that the time range is switched over to 3 ... 300 min. and the setting is complete. 

## **Control input B1** 

The functions RV, IF, AW, AV / RV have to be controlled via input B1 (+) with voltage against A2. The control signal could be the same as the auxiliary/control voltage of A1 or any other voltage between 12 and 240 V AC or DC. Operating a parallel load between B1 and A2 is also possible. 

If with function IF the inputs A1 and B1 are controlled simultaneously a pulse with the adjusted length is started. With the variant MK7850N/ 500 the output pulse can be disabled by setting the slide switch in Position "B". 

## **Time interruption and time addition with X3** 

On all functions, also with RV,IF, AW (EW/AW) and AB/RV the time delay can be interrupted during timing by bridging the terminals X2 - X3. By opening the bridge the time continues (time addition). While X2 and X3 are bridged the control input is disabled and the yellow LED remains in the state it had at stop. No external voltage must be connected to X2 and X3 as the unit may be damaged. 

## **Remote potentiometers** 

Both settings on variant  MK 7850N/500  can also be made by remote potentiometers of 10 kOhms: 

- terminals Z1 - Z2: potentiometer for time t1 

- terminals Z2 - Z3: potentiometer for time t2 

When connecting a remote potentiometer the corresponding potentiometer has to be set to min. If no remote potentiometers are required the terminals Z1-Z2 resp. Z2-Z3 have to be linked. The wires to the remote potentiometers should be installed separately from the lines with mains voltage. If this is not possible, a screened cable is recommendet where the shield is connected to Z2. 

To terminals Z1, Z2 and Z3 no external voltage must be connected, as the unit might be damaged. 

## **Additional function** 

With the variant MK7850N/500 additional features can be selected for the functions position 3, 4 and 7 using the slide switch S1 on the relay front in position "B". At the same time a second time setting t2 is available on the lower potentiometer (see function diagram) the time range is the same as for t1. 

## **Setting** 

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green LED<br>on when voltage<br>connected<br>yellow LED<br>function see range selector switch<br>indicators<br>time setting t1<br>function setting<br>slide switch S1 time setting t2<br>(only with MK7850N/500) (only with MK7850N/500)<br>M8302_a<br>**----- End of picture text -----**<br>


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M8302_a<br>**----- End of picture text -----**<br>


## **Time interruption / time adding with B1** 

With the functions AV, EW, IE and BI the time delay can be interrupted by controlling input B1 (+) with control voltage. Removing the control signal will continue the timing cycle (time addition). 

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**Time circuit** 

## **Technical data** 

## **Technical data** 

## **Clearance and creepage distances** 

**Time ranges:** 

**Time ranges:** 8 time ranges in one unit, settable via rotational switch 0.02 ... 1 s 0.3 ... 30 min 0.06 ... 6 s 3 ... 300 min 0.3 ... 30 s 0.3 ... 30 h 0.03 ... 3 min 3 ... 300 h **Time setting t1, t2:** continuous, 1:100 on relative scale (t2 only at MK 7850N/500) **Recovery time:** at DC 24 V: approx. 15 ms at DC 240 V: approx. 50 ms at AC 230 V: approx. 80 ms **Repeat accuracy:** ± 0.5 % of selected end of scale value + 20 ms **Voltage and temperature influence:** < 1 % with the complete operating range 

## **Input** 

AC/DC 12 ... 240 V 0.8 ... 1.1 UN Delayed contact approx. 7,5 V approx. 7 V Instantaneous contact approx. 3 V approx. 3.3 V 

**Nominal voltage UN: Voltage range: Release voltage (A1/A2)** 

AC  50 Hz: DC: 

AC 50 Hz: DC: 

**Max. permitted residual current with 2-wire proximity sensor control (A1-A2)** up to AC/DC 150 V: AC resp. DC 5 mA up to AC/DC 264 V: AC resp. DC 3 mA **Control current B1:** approx. 1mA, over complete voltage range **Min. on/off time of control input B1(+):** AC 50 Hz: approx. 15 ms / ca. 60 ms DC: approx.   5 ms / ca. 60 ms **Release voltage (B1/A2)** AC  50 Hz: approx. 3.5 V DC: approx. 3 V **Nominal power consumption** AC 12 V: approx. 1.5 VA AC 24 V: approx. 2 VA AC 240 V: approx. 3 VA DC 12 V: approx. 1 W DC 24 V: approx. 1 W DC 240 V: approx. 1 W **Nominal frequency:** 45 ... 400 Hz 

## **Output** 

**Contacts** MK 7850N.82: 2 changeover contacts, one programmable as instantaneous contact: 

without bridge X1-X2: 25-26-28 delayed changeover contact with bridge X1-X2: 21-22-24 instantaneous contact at UN on A1-A2 **Thermal current Ith: :** 2 x 4 A 

**Thermal current Ith:** 

overvoltage category / contamination level: **EMC** 

4 kV / 3 IEC 60 664-1 (4 kV / 2 at MK 7850N.82/61) 

Electrostatic discharge: 8 kV (air) IEC/EN 61 000-4-2 HF-irradiation: 30 V / m IEC/EN 61 000-4-3 Fast transients: 2 kV IEC/EN 61 000-4-4 Surge voltages between wires for power supply: 2 kV IEC/EN 61 000-4-5 between wire and ground: 4 kV IEC/EN 61 000-4-5 HF-wire guided: 10 V IEC/EN 61 000-4-6 Interference suppression: Limit value class B EN 55 011 **Degree of protection** Housing: IP 40 IEC/EN 60 529 Terminals: IP 20 IEC/EN 60 529 **Housing:** Thermoplastic with V0 behaviour according to UL subject 94 **Vibration resistance:** Amplitude 0,35 mm, frequency 10 ... 55 Hz,IEC/EN 60 068-2-6 **Climate resistance:** 40 / 060 / 04 IEC/EN 60 068-1 **Terminal designation:** EN 50 005 **Wire connection** DIN 46 228-1/-2/-3/-4 **Screw terminals (integrated):** 1 x 4 mm[2] solid or 

1 x 2.5 mm[2] stranded ferruled or 

2 x 1.5 mm[2] stranded ferruled or 

2 x 2.5 mm[2] solid 

Insulation of wires or sleeve length: 

8 mm 

**Plugin with screw terminals** max. cross section for connection: 

1 x 2.5 mm[2] solid or 

1 x 2.5 mm[2] stranded ferruled 

Insulation of wires or sleeve length: 8 mm **Plugin with cage clamp terminals** max. cross section for connection: 1 x 4 mm[2] solid or 

1 x 2.5 mm[2] stranded ferruled 

min. cross section for connection: Insulation of wires or sleeve length: **Wire fixing:** 

0.5 mm[2] 

12[±0.5] mm 

Plus-minus terminal screws M 3.5 box terminals with wire protection or cage clamp terminals Box terminals with wire protection DIN rail IEC/EN 60 715 approx. 150 g 

**Wire fixing: Mounting: Weight:** 

## **Dimensions** 

**Width x heigth x depth** MK 7850N/200: MK 7850N/200 PC: MK 7850N/200 PS: 

22.5 x 90 x 97 mm 22.5 x 111 x 97 mm 22.5 x 104 x 97 mm 

**Switching capacity** to AC 15 NO contact: 3 A / AC 230 V IEC/EN 60 947-5-1 NC contact: 1 A / AC 230 V IEC/EN 60 947-5-1 to DC 13: 1 A / DC 24 V IEC/EN 60 947-5-1 **Electrical life** IEC/EN 60 947-5-1 to AC 15 at 1 A, AC 230 V: 1,5 x 10[5] switching cycles **Short circuit strength max. fuse rating:** 4 A gL IEC/EN 60 947-5-1 **Mechanical life:** ≥ 30 x 10[6] switching cycles 

## **General data** 

**Operating mode:** Continuous operation **Temperature range:** - 40 ... + 60 °C 

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## **Standardtype** 

MK 7850N.82/200   AC/DC 12 ... 240 V Article number: 0054050 • Output: 2 changeover contacts, one programmable as instantaneous contact • Nominal voltage UN: AC/DC 12 ... 240 V • Time ranges: from 0.02 s ... 300 h • Width: 22.5 mm 

## **Variants** 

MK 7850N.82/61: With UL-approval (Canada/USA) MK 7850N.82/500: With 2 additional functions selectable via slide switch S1: 

- Cyclic timer, start with break (TP) - Fleeting on make and break (EW/AW) second time setting t2, connection facility for 2 remote potentiometers 10 kΩ to adjust t1 and t2 

MK7850.82/300: connection facility for 1 remote potentiometer 10 kΩ 

## **Ordering example for variant** 

MK 7850N .82 PS   /_ _ _   AC/DC 12 ... 240 V 

Nominal voltage Variant Type of terminals without indication: terminal blocks fixed, with screw terminals PC (plugin cage clamp): plugable terminal blocks with cage clamp terminals PS (plugin screw): plugable terminal blocks with screw terminals Contacts Type 

## **Accessories** 

AD 3: External potentiometer 10 kΩ 

The external potentiometer is used for remote setting of the time delay. The internal potentiometer of the timer must be set to min. time delay. 

Degree of protection front side: 

## IP 60 

## **Connection examples** 

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L(+) S1<br>A1 X2<br>AC/DC12...240V voltfree<br>A2<br>MK7850N control contact<br>N(-) S2 (stop function)<br>B1(+) X3<br>M5794<br>L(+)<br>S1 S2<br>A1 B1(+)<br>MK7850N<br>A2<br>N(-)<br>M8127<br>**----- End of picture text -----**<br>


Control with parallel connected load 

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L(+) AC/DC12...240V<br>DC24V<br>S1<br>e.g. PLC<br>semi-<br>conductor<br>A1 B1(+) output<br>MK7850N<br>A2<br>N(-)<br>M8292<br>**----- End of picture text -----**<br>


Connection with 2 different control voltages. 

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**E. DOLD & SÖHNE KG • D-78114 Furtwangen** 

~~TTT~~ e-mail dold-relays@dold.com  • internet http://www.dold.com 

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