Configuring Redundancy; External Alarm Connections - Cisco Prisma II Installation And Operation Manual

Configuring Redundancy

You can configure the receiver module for redundancy in one of two ways:
Use the ICIM or LCI to place both receiver channels in either Master or Slave

operating mode, and then use a redundancy interface panel to hard-wire the
desired Master-Slave relationships between receiver modules.
Use the ICIM or LCI to place the receiver module in Independent operating

mode, configure each receiver channel individually for either Master or Slave
operation, and define the desired Master-Slave relationships between receiver
channels.
This section explains the hardware configurations required to support each of the
methods described above. Procedures for using the ICIM or LCI to configure the
module for redundancy are provided in Operation Using ICIM (on page 39) and
Operation Using LCI (on page 75).
Important: The two methods described in this section are not compatible with each
other. Do not connect the redundancy interface panel to the receiver module when
using Independent mode operation to provide redundancy.

External Alarm Connections

The Prisma II Standard and XD Chassis can be configured for local hard-wired
redundancy using the ALARM IN and ALARM OUT connectors located on the
connector interface panel. A pair of application modules can be configured in a
Master-Slave relationship so that, if the Master fails, the Slave takes over in response
to ALARM IN and ALARM OUT signaling.
This module ships from the factory configured for Single mode operation. In Single
mode, the module acts as a stand-alone device unaffected by the alarm status of any
other application module. When used in pairs in a redundant configuration, one
module in the pair is set to Master mode operation and the other is set to Slave
mode.
With this configuration, the Master communicates its critical alarm status to the
Slave. When the Master module is not in alarm, the Master is enabled and the Slave
is disabled. When the Master is in alarm, the Master is disabled and the Slave is
enabled.
The ICIM2 front panel, LCI, TNCS or ROSA, CLI, or ICIM Web Interface can be used
to select Master, Slave, or Single mode operation of the module as needed.
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Configuring Redundancy

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