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14
Installation
To install the ISC, perform the installation procedures described in the following sections, in the order in
which they are presented.
1.
Wire the unsupervised alarm inputs for power fault and cabinet tamper monitoring.
2.
Wire the upstream host communication.
3.
Wire the downstream device communication.
4.
Wire the power input.
5.
Remove the plastic safety strip from the memory backup battery.
14.1
Wiring
14.1.1
Unsupervised Alarm Inputs: Power Fault and Cabinet Tamper
Monitors
The ISC features two unsupervised alarm inputs that can be used for power fault and cabinet tamper
monitoring. These inputs are connected using the Input 2 (IN2) and Input 1 (IN1) contact terminals on the
ISC board.
Input 2 and Input 1 are both simple N/C (normally closed) contact closure monitors.
Wire the Input 2 and Input 1 contacts using twisted pair cable, 30 ohms maximum. (No EOL resistors are
required.)
Note:
If either of these inputs is not used, a shorting wire should be installed.
14.1.2
Upstream Host Communication
The ISC uses Port 1 to communicate to the host system. Port 1 can be wired as an RS-232 interface for direct
one-to-one (or modem) communication, or as an RS-485 interface for multi-drop or extended distance
communication.
Unsupervised Alarm Input Wiring.
CABINET
TAMPER
POWER
FAULT
Hardware Installation Guide
GND
IN 2
GND
IN 1
79
revision 7 —
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