ADI RELA-SRV-1 User Manual Download Page 1

Installation Sheet 

16DEC07 

 P/N: 3101055 REV: 2.0 

RELA-SRV-1 Service Disconnect Switch - RELA-ABT Abort Switch 

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RELA-SRV-1 Service Disconnect Switch 

RELA-ABT Abort Switch 

 

RELA-SRV-1 Service Disconnect Switch 

 

 

The RELA-SRV-1 Service Disconnect Switch is 
a key operated, manual switch station. It has 
both a normally closed and normally open dry 
contact relay. The switch is used to disconnect 
the releasing module for servicing. 

Specifications 

Voltage and rated average current 

30 Vdc at 2 A, 250 Vdc at 1 A, 600 Vac at 3 A 

Wire: 12 to 18 AWG 
Dimensions: 3.25 x 4.87 x 3.87 in (82 x 124 x 98 mm) (W x H x D) 

Installation instructions 

To install the RELA-SRV-1: 

1. 

Install the ground screw in the back of the back plate assembly. 

2. 

Connect the lock assembly to the back plate. Pass the threaded 
portion of the lock assembly through the back plate and secure it 
with the lock nut. Make sure the keyhole is in a vertical position. 

3. 

Push the relay holder onto the back of the lock assembly until it 
snaps into place. Make sure the releasing lever is pointed up. 

4. 

Wire the relays. See the “Wiring diagram” for details. 

5. 

Mount the back plate assembly to an existing single gang 
electrical box using the #6-32 screws provided. 

6. 

Push the octagon-shaped switch housing piece onto the lock 
assembly with “Normal” at the top of the keyhole. 

7. 

Connect the housing cover to the back plate assembly using the 
housing screw provided. 

Ground screw

Back plate assembly

Back plate mounting

screws

Housing mounting screw

Housing cover

Single gang box

Lock nut

Relay terminal

assembly

Terminal holder

releasing lever

Lock assembly

Octagon-shaped

switch housing piece

 

You may need to remove the relay holder or a relay to make wiring 
easier or you may need to install a different relay. Use the installation 
instructions that follow to perform these tasks. 

To remove the relay holder: 

1. 

Hold the housing firmly in one hand. 

2. 

Apply downward pressure on the relay holder releasing lever. 

3. 

Remove the relay holder and relays. 

To remove a relay: 

1. 

Insert a small screwdriver where the relay connects into the relay 
holder. 

2. 

Pry upward to release the relay from the holder. 

Relay holder
releasing lever

   

 

To install a relay: 

1. 

Insert the bottom of the relay in the bottom slot on the relay 
holder. 

2. 

Push upward to lock the relay in place in the top of the relay 
holder. 

 

Wiring diagram 

A normally closed (NC) and a normally open (NO) relay are provided. 
Wire the normally closed relay to the releasing module circuit. Wire the 
normally open relay to a supervisory module. 

Note: 

UL requires that the supervisory module must be configured as 

a supervisory point and must report to the control panel. 

Releasing

module

Supervisory

module

NO relay

NC relay

EOL device

To control

panel

 

Operation 

A key is required to operate the RELA-SRV-1. Two keys are provided 
with the switch. The key is used to activate and reset the switch. The 
key can be removed from the switch in either mode. The switch 
disconnects the releasing module for servicing. When activated, an 
open event and a supervisory event are indicated at the control panel. 

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