FARADAY, LLC
446992 ISSUE I REV. A
PAGE 1 OF 1
INSTALLATION INSTRUCTIONS AND WIRING FOR
CONVENTIONAL EXPANSION BOARD
CAT. NO. CEB-1 P/N 12503
The 12503 Conventional Expansion Board is an optional module for the 12500, 12530 or 12540 Fire Alarm
System Control Unit. The Conventional Expansion Board provides 4 Class B (Style B) IDCs and 2 Class B
(Style Y) NACs. A 12401A Class A Adapter may be added to convert to 4 Class A (Style D) IDCs and 2
Class A (Style Z) NACs. Up to two Conventional Expansion Boards may be mounted in the enclosure above
the Main Termination Board. If more than one expansion board is used, the extended enclosure is required.
PARTS SUPPLIED
1
12503
Conventional Expansion Board
6
29529-11
Screws, 6x32 ¼”
1
446651
Cable Assembly, 34 pin 12”
4
942665
Resistors, 3.9K Ohm 1/2W
2
942676
Resistors 4.7K Ohm 1/2W
1
446992
Instruction Sheet
12503 WIRING
NAC
IDC
Smoke/Manual
Initiating Device
Circuit
Class B, Style B
Supervised,
Typical
Powerlimited
Faraday
P/N 10808
3.9K 1/2W
Waterflow
/Supervisory
Initiating Device
Circuit
Class B, Style B
Supervised,
Typical
Powerlimited
Faraday
P/N 10823
2.2K 1/2W
Faraday
P/N 10822
1.8K 1W
Tamper
Waterflow
Faraday
P/N 10812
4.7K 1/2W
Notification
Appliance Circuit
Class B, Style Y
Supervised,
Typical
Powerlimited
Notification Appliance Circuit #1
See wiring below
Coventional Expansion Board
1+
1-
2+
2-
3+
3-
4+
4-
1+
1-
2+
2-
+
-
Initiating Device Circuit #3
See wiring above
Initiating Device Circuit #4
See wiring above
Optional External 24VDC nominal input for
NACs 1&2, 3 Amp. Max.
Use Faraday 12408 Auxiliary Power Supply
Supervised, Powerlimited
Cut Jumpers WJ1 & WJ2 to enable
(Must be in the same
room and in conduit)
WJ2
WJ1
NOTES:
1.)
Units to be installed in accordance with all local
electrical codes.
2.)
Terminal block will accept a maximum of #12
AWG wiring.
3.)
See Owners Manual for compatible devices.
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 Conventional Expansion Board(s) with six
screws (P/N 29529-11) as shown.
NOTE:
The Conventional Expansion Board
connector P10 must be aligned with the circuit
board connector below.
Step 4.) Connect cable assembly(s) (P/N 446651) from
the Main Logic Board connector P1 to the
Conventional Expansion Board connector P4.
Step 5.) Attach conduit and run wires as required.
Step 6.) Connect wires to the fire alarm system control
unit as required.
NOTE:
The circuit shown for the combination
Waterflow and Supervisory devices CAN NOT be
w ired for Class A. Waterflow devices can be
wired Class A as shown for a conventional IDC.
Step 7.) Apply power to system.
Step 8.) Check for proper operation of functions.
12503 MOUNTING
P 1
P 5
P 4
IN
OUT
IDC
NAC
P 3
P 1 0
Screws (6)
Conventional
Expansion
Board
IDC Ratings:
Zone Identifier H
Standby Voltage: 16-27 VDC
Max Standby Current: 10 mA
Max Alarm Current: 48 mA
Max Ripple: 1.5 VAC
Max Wire Loop Resistance: 100 ohms
NAC Ratings:
Alarm Voltage: 24VDC nominal
Ma Standby Current: 3.4 mA
Max Alarm Current: 1.5 A
Max Ripple: 1.5 VAC
Max Wire Loop Voltage Drop: 1.0 VDC
Main
Termination
Board
