Rockwell Automation 1785-BCM_BEM, D17856.5.4 PLC-5 Backup Communication Module User Manual User Manual
Page 35
Installing Your PLC-5 Backup System
Chapter 3
3-12
Connecting the 1785-BCM Modules
Connect the High Speed Serial Link (HSSL) to establish communication
between the 1785-BCM modules of the primary system and the secondary
system. The cable for these connections can be a maximum of 15 feet. To
do this, connect a 1770-CD or Belden 9463 cable to terminals 1, 2, and 3
on the wiring arm of each 1785-BCM module as shown in Figure 3.6.
Figure 3.6
1785-BCM Module Connections for High-Speed Serial Link
1 7 9 8 0
PLC-5 processor
PLC-5 processor
Connections show default configuration with Channel 1A as Data Highway Plus
and Channel 1B as Remote I/O Scanner.
1785-BCM module
1771-P4S
power supply
1785-BCM module
1771-P4S
power supply
High Speed Serial Link (HSSL)
1770-CD Cable or Belden 9463
(15 feet maximum)
Blue
Shield
Clear
Blue
Shield
Clear
Local I/O Chassis
Local I/O Chassis
ATTENTION: The 1785-BCM series B module communicates
with the 1785-BCM series A module only if switch 1 of the
SW1 switch assembly is set to ON and if SW2 switch assembly
is properly configured.
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