Prisma II 1310 nm High Density Transmitter and Host Module ...

Chapter 2 Module Installation
For detailed information on ALARM IN and ALARM OUT connectors, see the
Prisma II Chassis Installation and Operation Guide, part number 713375 or the Prisma
II XD Platform System Guide, part number 4021339.
When a critical alarm occurs in a Master module, the Master turns off and the Slave
(redundant module) is enabled. To make this happen, the pin representing the
Master module slot in the ALARM OUT connector must be externally wired to the
pin representing the Slave module slot in the ALARM IN connector. After wiring
these contacts, take care to ensure that the Master and Slave modules are not moved
to other slots. Otherwise, the ALARM IN and ALARM OUT connectors will need to
be rewired to the appropriate pins.
Note:
Any device configured as Single or Master ignores its ALARM IN contacts.
To verify proper wiring and redundant configuration, simply unplug the Master
module and observe that the Slave module turns on.
Master/Slave Illustration
Redundancy Interface Panel
The Prisma II Redundancy Interface Panel is an accessory to the Prisma II platform.
It is intended to be used with the master/slave feature and the contact closure alarm
feature of the Prisma II platform.
The Prisma II Redundancy Interface Panel serves as an extension to the two DB-37
connectors labeled ALARM IN and ALARM OUT on the connector interface panel
of the chassis. The terminals on the redundancy interface panel are extensions of
pins on the ALARMS OUT and ALARMS IN connectors on the chassis.
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