ABB CSA463AE Analog module industrial system controller

Description

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ModuleBus Extension and Termination
A terminator, TB807, must always be mounted on the last I/O-unit on the
ModuleBus. A ModuleBus terminator is delivered with the PM8xx processor unit.
For additional information about the ModuleBus, refer to the Product Guide for
S800 I/O.
RCU Link Cable and Termination
TB852 RCU Link Terminator Plug
The TB852 RCU Link Terminator Plug is required when the processor unit
PM858/PM861/PM862/PM864/PM865/PM866/PM867 operates in single
configuration. This is plugged to the RCU Link port on the processor unit.
TB853 RCU Control Link Terminator Plug
The TB853 RCU Control Link Terminator Plug is required when the PM891
processor unit operates in single configuration. This is plugged to the RCU Control
port at the top of the PM891 unit.
TK851 RCU Link Cable for PM8xx
The Redundant Control Unit Link Cable, TK851, is used to transfer log data from
the Primary CPU to the Backup CPU and to exchange status and control
information between the Primary and the Backup CPUs, see Figure 19 on page 61.
The RCU Link uses 68-pole connectors. One of the connectors has a label marked
“UPPER”. The CPU connected to this connector will be defined as the upper CPU
in the Control Builder and Operator Station.
The RCU Link Cable is also used as interconnection cable between two BC810
modules.
TK855 RCU Data Link Cable for PM891
The TK855 Redundant Control Unit Data Link Cable, connected between
redundant PM891 units, transfers the data required to keep the backup PM891
synchronized with the primary PM891.