Version 5.8 61 July 2009
Installation Manual 3. Installation
¾ To cable the PEM modules for BITS synchronization mode:
1. Connect the Trunk from BITS source A to the RJ-48 port (labeled BITS/SETS), located
on the lower PEM module (A).
2. Connect the Trunk from BITS source B to the RJ-48 port (labeled BITS/SETS), located
on the upper PEM module (B).
Figure 3-14: Cabling BITS Trunk Sources on PEM
3.3.5 Connecting the Alarm Terminal Block Closures
The Alarm Terminal Block closure on the PEM module contains four groups of terminals for
connecting external Telco alarm devices according to Critical, Major, and Minor severity
levels. Devices can be controlled using the Common (COM) and Normally Open (NO)
method. The IN connector is for user-defined connections (currently not supported).
The PEM module provides three dry contact relays for connecting to Telco alarm
equipment. Each alarm output is a dry relay contact. Each contact can withstand up to a
maximum of 30 VDC when open and carries up to a maximum of 2 A DC when closed.
¾ To cable the PEM alarm terminal block closures:
Using 20-AWG copper wires, connect the PEM module's alarm terminal block closures
to an external Telco alarm device. Connect the closures of the PEM using the normal
logic method in which the equipment has NO and COM terminals (refer to the table
and figure below).
Figure 3-15: Spring-Cage Alarm Terminal Block Pins
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