Cisco Prisma II Installation And Operation Manual page 31

Master/Slave Connections
Master/Slave Operation
The Prisma II Reverse Receiver ships from the factory configured as a "Master". LCI,
TNCS, or the ICIM can be used to reconfigure the module as a "Slave." The Prisma
II Chassis allows for local hard-wired redundancy by using the ALARM IN and
ALARM OUT connectors located on the chassis. You can configure a pair of
modules so that if the master fails, the slave will take over.
MASTER MODULE
A high
OFF
enables the
ON
module (e.g.
turns on the
ENABLE
transmitter) CONTROL
To make a module a MASTER, set the
Master/Slave control to "Master" (the default).
The state of the slave input is ignored.
Notes:
• The ALARM RELAYS are shown in their NORMAL (non-alarmed) state.
When a CRITICAL FAULT occurs, the relay changes to the open state.
Then ENABLE CONTROL is shown in its OFF position. LCI, TNCS, or the
•
ICIM can be used to change its position.
Alarm In/Out Connector Reference
For ALARMS IN/OUT pin connector reference, see Alarm I/O and Master/Slave
Chassis Connections in Chapter 2 of Prisma II Chassis Installation and Operation Guide,
part number 713375.
2-14
Inter-module connections are made on
the back of the chassis using
"ALARMS IN" and "ALARMS OUT"
ALARM
RELAY
CRITICAL FAULT
NORMAL
M
S
MASTER/
SLAVE
CONTROL
Installation
connectors.
Part of
ALARMS IN
connector
Part of
ALARMS OUT
connector
ALARM
Part of
RELAY
ALARMS IN
connector
Part of
To make a module a SLAVE, set the
ALARMS OUT
Master/Slave control to "Slave". The slave
connector
w ill not turn on unless the master module
SLAVE MODULE
MASTER/
SLAVE
CONTROL
S OFF
ON
M
ENABLE
CONTROL
CRITICAL FAULT
NORMAL
is removed or has a critical fault.
78-713378-01 Rev C
A high
enables the
module
(turns on the
receiver)