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78
Wiring
For UL installations, refer to section
78.1
Supervised (Software Configurable) Alarm Inputs
Wire the I1 and I2 inputs across pins 1 & 2 and 3 & 4 of J15 using a twisted pair cable, 30 ohms maximum.
Terminate each of these inputs with two (2) 1k (1000) ohm resistors (1% tolerance - 0.25 watt).
Note:
Resistors must be installed as shown in the SDC wiring diagram if the installation requires
supervision.
The two (2) inputs available on the SDC are software configurable alarm inputs that can be used for alarm
device monitoring. Each of these inputs can be configured, via the Access Control software, as either N/O
(normally open) or N/C (normally closed) in combination with either supervised or unsupervised wiring.
These alarm inputs are connected using Inputs 1 and 2.
Each input that is configured as a supervised alarm must also be terminated with two (2) 1K (1000) ohm
resistors (1% tolerance - 1/4 (0.25) watt. N/O and N/C alarms are terminated identically). Resistors are
provided with the module.
Install the resistors as close to input device as possible. For cable length limitations, refer to the
Specifications
section on page 401.
UL Listed Installations
on page 400.
SDC input wiring
Hardware Installation Guide
393
revision 7 —
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