ELK924

## **Sensitive Relay** 

## **ELK-924 & 924-4** 

The ELK-924 Sensitive Relay module features DPDT (Form “C”) dry contacts for general purpose switching of devices or high current loads. It operates on 12 or 24 Volts D.C. and can be triggered with a negative or positive input at an incredible low current of only 1 milliamp. Also available in a 4 pack (ELK-924-4) which is packaged as 4 relay modules grouped on a prescored break-off circuit board. 

## **Features** 

- Super Low 1.2 mA Trigger Current. 

- Positive (+) Or Negative (-) Trigger Input. 

- Double Form “C” Contacts DPDT. 

- Heavy Duty Contact Rating. 

- On Board LED Status Indicator. 

- Includes Double Sided Mounting Tape. 

- Mounts in Standard 2.75" Snap Track. 

- Packaged in Reusable Poly Storage Box. 

- Lifetime Limited Warranty. 

## **Specifications** 

- Operating Voltage:  12 or 24 Volts D.C., jumper selectable. 

- Current Draw:  60mA (both relays on). 

- Relay Contacts:  Form “C”, 7A @ 30 VDC, 10 A @125 VAC. 

- Size:  1.5” x 2.75”. 

- Trigger Voltage:  5 - 24 Volts D.C. 

- Trigger Current:  1.2mA @12 VDC. 

PO Box 100 • Hildebran, NC 28637 • 800-797-9355 • 828-397-4200 Fax 828-397-4415 • www.elkproducts.com • info@elkproducts.com 

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**Instructions** 

## **ELK-924** 

## **APPLICATIONS AND WIRING DIAGRAMS** 

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Wire Jumper:<br>Cut for 24V operation Relay "B" Contacts:<br>COM and N/C are connected<br>Power Terminals: when ELK-924 is off (no trigger).<br>Connect to Aux. Power. COM and N/O are connected<br>POS = "+", NEG = "-" when ELK-924 is on.<br>Trigger Terminals:<br>For positive (+) outputs, use +T. Relay "A" Contacts:<br>For negative (-) outputs, use -T. ELK-924 COM and N/C are connected<br>when ELK-924 is off (no trigger).<br>COM and N/O are connected<br>when ELK-924 is on.<br>RED LED (D3):<br>On:  The ELK-924 is triggered and BOTH relays are<br>energized (COM and N/0 are connected).<br>Off:  The ELK-924 is not triggered and BOTH relays<br>are de-energized (COM and N/C are connected).<br>B<br>N/C<br>POS 24V OPEN COM<br>NEG N/O<br>-T N/C<br>+T COM<br>D3 N/O<br>A<br>**----- End of picture text -----**<br>


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Control Panel +12V Dual Switch 120VAC Control Panel Parallel Contacts for High<br>Low current"+" Alarm GND (SimultaneouslySwitches 12V DC and Floodlight GND+12V Current Switching High Current<br>Output 120V AC) Low current "+"alarm output Load (12A max)<br>+ -<br>Heavy-<br>gauge<br>Wires<br>+ Siren or ELK-924 + -<br>ELK-924 - Bell Heavy-Duty<br>Power Supply<br>+ -<br>12V Power<br>Supply<br>POS 24V OPEN B N/CCOM POS 24V OPEN B N/C<br>NEG-T N/ON/C NEG+T-T N/O COMN/C<br>+T COM<br>D3 COMN/O D3 A N/O<br>A<br>**----- End of picture text -----**<br>


**Example 1:** The relays are used to switch two different voltages.  The ELK-924 is powered by the control panel and triggered by a low-current, positive alarm output. 

**Example 3:** Wire jumpers are used to tie Relays "A" and "B" in parallel for high current switching.  Currents as high as 12A can be switched with this hookup. **Note:  Use heavy-gauge wire for all high current runs.** 

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Hookup Examples for Disabling Sensitive Trigger<br>Control Panel +12V Access-Activated 24-Hour Control Panel<br>GND Zone Shunt "+" AlarmOutput<br>24 hr.zone "-" AccessOutput GND<br>Not Jumper between<br>Used POS and +T<br>ELK-924<br>Control Panel<br>ELK-924 +12V<br>"-" Alarm<br>Output<br>NC<br>Switch Jumper between<br>NEG and -T<br>ELK-924<br>B<br>N/C<br>POS 24V OPEN<br>NEG N/O COM<br>B N/C +T-T N/CCOM<br>POS 24V OPEN D3 N/O<br>NEG N/O COM A<br>-T N/C<br>+T COM<br>D3 N/O B<br>A N/C<br>POS 24V OPEN COM<br>NEG N/O<br>-T N/C<br>+T COM<br>D3 N/O<br>A<br>**----- End of picture text -----**<br>


**Example 2:** Relay "A" is used to bypass a 24 hour zone when an access code is entered on the control's keypad.  The "-" Access Output is connected to **-T** on the ELK-924. 

**Example 4:** If sensitive trigger is not desired, place a wire jumper between POS and +T (for positive output controls) or between NEG and -T (for negative output controls). 

05/03