User Manual PLC-3 BACKUP CONC(OR.DU1 Owner's manual

Installing a Backup System
Chapter 2
2-21
Connecting an I/O Channel for Backup Communication
Any I/O channel can be used for backup communication. Figure 2.16
shows the connections when using I/O channel 1.
Figure 2.16
Connecting
an I/O Channel for Backup Communication
Twinaxial Cable (cat. no. 1770-CD)
10394
Primary Processor Backup Processor
Shield
Clear
Channel No. 1 Shown
Blue
Blue
Terminator
(cat. no. 1770-XT)
Channel No. 1 Shown
Clear
Shield
Terminator
(cat. no. 1770-XT)
(Refer to page 223)
(Refer to page 223)