
1 2 5 3 0 / 1 2 5 4 0 O W N E R ' S M A N U A L
P/N 447203 Issue I
II-2
MINIMUM CONTROL UNIT CONFIGURATION
Power Supply
A 4A, 24V nominal power supply provides all operating power to the control unit for both standby and
alarm conditions. Sufficient battery charging capability is available to charge sealed lead-acid batteries
within code requirements for 60 hour quiescent plus 5 minutes alarm. The cabinet will hold batteries only
up to 10 AH. The back-up battery is 24V, maintained by floating on the power supply. The power supply
is physically contiguous with the main board.
Addressable Device Circuits
The main termination board has an addressable loop driver board supporting two addressable device
circuits, that is programmed for connection to Faraday or System Sensor addressable devices.
Faraday Addressable Devices:
Each addressable device circuit drives up to 60 addressable devices, detectors and/or modules.
System Sensor Addressable Devices:
Each addressable device circuit drives up to 99 addressable sensors and 99 addressable
modules.
Notification Appliance Circuits
The base control unit has four notification appliance circuits (NACs). Each circuit can be selected to give
continuous output or one of eight sounding patterns available in the control unit. There is also a system
coder capable of zone coded operation. All of the NACs are power limited and can be wired for Class B
(Style Y) operation or Class A (Style Z) operation with the Faraday 12504 Class A Adapter.
RS485 Communications Circuit
The control unit has a RS485 Communications Circuit that will drive up to 16 remote LCD annunciators
and 8 Serial Relay Units and Serial Annunciator Units on the RS485 communication line.
Status Relays
Five dry relay contacts are provided. These contacts are dedicated to alarm, trouble, supervisory, AC
failure and processor failure indications. The relay contacts are form C and are rated 2A@30VDC or
0.5A@30VAC, resistive.
City Tie Connection
The city tie connection provi des reverse polarity, local energy or shunt operation. The polarity reversal
connections provide an alarm circuit with trouble and/or supervisory output.
RS232 Printer Connection
The RS232 printer connection will allow event data to a serial printer, terminal or computer or data from
and to a Network Interface Board.