ABB AC 800M Manual page 91

Section 2 Installation
5.
Note that the RCU Link Cable TK851 must be used and can not be replaced by a
similar cable. Using another cable will disable the identification of the CPUs in
the CB and Operator Station. When running in single configuration the RCU
Link Cable TK851 might temporarily be used to perform the function of a
termination plug.
The CPU connected to the RCU Link Cable connector marked "UPPER" will be
defined as "UPPER" in the Control Builder and Operator Station. The marking
has no relevance to the physical placement of the CPUs. Any CPU can become
the Primary CPU.
6.
Both CPUs should be powered from the same supply (single or redundant). For
redundant power supply, see
7.
Connection to the optical ModuleBus is identical to that for the processor unit
and for the FCI in S800 I/O
3BSE036351-510 A
Installing the PM86x/TP830 Processor Unit in Redundant Configuration
Connect the RCU Link Cable TK851 to both CPUs. Note that in redundant
CPU configuration, COM3 and the electrical ModuleBus on the baseplate can
not be used.
Baseplates cable connections:
a. Connect the power leads to both CPUs and the power supervision signals
from SS8xx to screw terminals SA and SB (see
b. Connect the Control Network cables to CN1 (single bus connection) or
CN1 + CN2 (redundant bus connection). The Control Network is
connected to both CPUs.
c. Connect the Control Builder to COM4 with cable TK212 of the Primary
CPU (if required for changing an IP address etc.). Otherwise connect the
Control Builder to the Control Network.
Connect the optical ModuleBus to the optical contacts on the processor units
(see Figure 2 on page 32 and
optical cable selection and cable length is provided in the S800 I/O
documentation.
Figure 46 on page 140.
Figure 40 on page 131). Information regarding
(Figure 55 on page 161).
Figure 28 on page 83).
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