Rockwell Automation 1779-KP3R DATA HIGHWAY II - Manual (Page 34)

Installing the 1779-KP3
Communication Interface
Chapter 2
2Ć18
Backup Cable Wiring for Linking a KP3 to an S4A, S5, or MX
The following diagram shows the recommended wiring for a backup cable
linking a KP3 module to an S4A or MX module.
Figure 2.11
Recommended Wiring for Backup Cable Linking a KP3 to an S4A, S5, or MX Module
1
2
3
4
1
2
3
4
11011-I
If the PLC–3 processor is communicating on more than one link, connect
the KP3s in each chassis by routing a 1775–CBB cable from backup port
A on the first KP3 to backup port B on the next KP3 (figure 2.12).
Figure 2.12
Backup Cable With More Than One Data Highway II Link
S4A KP3
Pin 1 Backup A
Backup B
KP3 S4A
Backup A
Backup B
Pin 1 Pin 1
Pin 1
Pin 1
KP3 KP3
Backup A
Pin 1
Backup B
Pin 1
Backup B
Pin 1
Backup A
Pin 1 Pin 1
Important: Because of the various options for this cable, refer to the
backup cable configuration information in the PLC–3 Backup
Concepts Manual (publication 1775–6.3.1).
11012-I
1775-CBB or
1779-CBC Cable
1775-CBB or
1779-CBC Cable
1775-CBB or
1779-CBC Cable
Creating a Backup System for
a PLC-3 Communicating on
Multiple Links