ACS-160 Series & STL-160 Series T1 Multiplexer Installation & Operation 3 – Installation & Wiring
Version 2.11, August 2011
3-2 Harris Corporation
Intraplex Products
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Warning! Follow all of your company’s rules regarding AC or DC powered equipment installation. If
there is a conflict between any procedure in this manual and your company’s safety rules,
your company’s safety rules must take priority.
3.3 Multiplexer Shelf Installation
ACS-160 Series multiplexers are normally shipped pre-configured, with common and channel modules
already installed. All modules and module adapters can remain in place while bolting each shelf into its
equipment rack.
1. Bolt the shelf into its equipment rack. Allow at least a 1RU (that is 1.75" high) of space between
shelves when using DC supplies or 2RU of space (a total of 3.5") when using AC supplies to avoid
possible heat problems.
2. Make sure all modules, module adapters, and module interface units are seated properly.
Note: If the shelf is AC-powered, make sure that the power cable is accessible for maintenance
purposes.
Each 3RU Intraplex shelf can contain a second power supply for redundancy. If the main supply fails,
the system uses the redundant supply to continue operating. Simply insert the second power supply
into the redundant supply slot on the front (indicator light turns on exactly as those on the main
supply). Due to space limitations, 1RU shelves do not have the capacity for redundant power supplies.
Power supply modules require no special setup. As long as they are plugged into their respective slots
and system power is applied, they operate normally. If a 3RU shelf is equipped with two power
supplies (main and redundant) and one of the supplies fails, it may be removed and a new supply
inserted without turning off the system.
3.4 Redundant CM-5RB Modules
3.4.1 Redundant CM-5RB Installation
The CM-5RB redundancy feature can be used with the MA-235-1 and MA-235-2 module adapters. A
multiplexer equipped with redundant CM-5RB modules automatically switches from the primary
module over to the backup module when it detects a line or hardware failure. When the line or
hardware failure is repaired, the backup CM-5RB module can revert (automatically or manually) to the
primary CM-5RB module.
Install the primary CM-5RB module in the same slot number as the MA-235-1 module adapter. Install
the backup CM-5RB module in the slot adjacent to the primary module and connect it to the MA-235-2
module adapter.
Redundant CM-5RB modules do not function with CM-5 common modules. CM-5RB (or CM-5R-TD)
modules have a version of REV B8 or higher stamped on the circuit boards.
Note: CM-5RB modules are fully interchangeable. Any CM-5RB module can be used as a primary
terminal, DI-A, or DI-B multiplexer. Any CM-5RB module can also be used as a backup
terminal, backup DI-A, or backup DI-B multiplexer.
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