FARADAY, LLC
447073 ISSUE I REV. C
PAGE 1 OF 2
INSTALLATION INSTRUCTIONS AND WIRING FOR
SERIAL RELAY UNIT
CAT. NO. SRU-1 P/N 12507 AND
SERIAL RELAY EXTENDER
CAT. NO. SRE-8 P/N 12508
The 12507 Serial Relay Unit is an optional accessory for the 12100, 12120, 12500, 12530 or 12540 Fire
Alarm System Control Unit. The 12507 includes a processor board and a relay board. The processor board
receives commands from the control unit for activating the relays and transmits supervision and control
functions to the control unit. The processor board can control up to 3 relay boards. Each relay board
provides 8 relays with form C contacts. The control unit can address up to 8 Serial Relay Units and/or
Serial Annunciator Units. Auxiliary power supplies will be required to power units beyond the control unit
capability.
12507 PARTS SUPPLIED
1
413320
Processor Board Assembly
1
413321
Relay Board Assembly
1
446653
34 pin Cable Assembly, 3 1/2”
1
447042
PCB Track, 14 1/2”
1
447080
10 pin Cable Assembly, 6”
1
443269
Screwdriver
3
18965
Keps Nut, #6-32
1
447073
Instruction Sheet
12508 PARTS SUPPLIED
1
413321
Relay Board Assembly
1
446652
34 pin Cable Assembly, 15”
1
446653
34 pin Cable Assembly, 3 1/2”
1
447042
PCB Track, 14 1/2”
3
18965
Keps Nut, #6-32
1
447073
Instruction Sheet
12507 DIMENSIONS
12508 DIMENSIONS
Step 1.) Installation is to be done by qualified personnel
who have thoroughly read and understood this
instruction sheet.
Step 2.) Disconnect all power into system, including
batteries.
Step 3.) Mount enclosure as required.
Note:
Enclosure must be UL Listed for Fire Protective
Signaling Use (Faraday P/N 401403 Fire Alarm
Accessory Enclosure).
Step 4.) Attach conduit and run wires as required.
Step 5.) Set processor board dip switch for proper
remote address (1- 8).
Step 6.) Set each relay board dip switch for proper relay
set number (1- 8, 9-16, 17-24).
Note:
Relays are numbered from left to right:
Relay Set
TB1
TB2
TB3
TB4
(1-8)
1
2
3
4
5
6
7
8
(9-16)
9
10
11
12
13
14
15
16
(17-24)
17
18
19
20
21
22
23
24
Step 7.) Set jumper P6 for desired buzzer operation.
J6 – BUZZER ACTIVATION
•
REMOTE (Header P2)
•
•
LOCAL (Processor Board Buzzer)
Step 8.) Mount PCB Track(s) using #6-32 keps nuts (P/N
18965) and snap in PCB assemblies.
Step 9.
Plug in the cable assembly(s) to the PCB
assemblies as required.
Step 10. Connect ground wire(s) to chassis ground using
#6-32 keps nut(s) (P/N 18965).
Step 11.) Connect IN wires from fire alarm system control
unit or previous remote as required.
Step 12.) Connect OUT wires to next remote or 120 ohm
terminating resistor (Faraday P/N 942664), if last
remote.
Step 13.) Connect relay contacts, as required.
Step 14.) Apply power to system.
Step 15.) Program control unit for required relay operation.
Step 16.) Check for proper operation of functions.
