Rockwell Automation Publication 1715-UM001J-EN-P - December 2020
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Chapter 1 Redundancy System Overview
Figure 3 - 1715 Redundant I/O System Star Topology Attached to a 1756 ControlLogix Enhanced
Redundancy System
To prevent ground loops caused by shielded cables, RJ45 shields on the
ethernet ports on the 1715 adapter base unit are connected to earth through a
parallel resistance /capacitance circuit arrangement as shown in
below:
1756-RM2
1756-EN2T
IO BASE
1715-A310
CH1
CH1
CH1
CH1
CH1
CH1
CH1
CH1
TERMINAL IDENTITY
AOTA
Dual.
CH1
CH1
CH1
CH1
CH1
CH1
CH1
CH1
TERMINAL IDENTITY
AOTA
Dual.
CH1
CH1
CH1
CH1
CH1
CH1
CH1
CH1
TERMINAL IDENTITY
AOTA
Dual.
IO BASE
1715-A310
CH1
CH1
CH1
CH1
CH1
CH1
CH1
CH1
TERMINAL IDENTITY
AOTA
Dual.
CH1
CH1
CH1
CH1
CH1
CH1
CH1
CH1
TERMINAL IDENTITY
AOTA
Dual.
CH1
CH1
CH1
CH1
CH1
CH1
CH1
CH1
TERMINAL IDENTITY
AOTA
Dual.
1715-AENTR
1756-EN2T
1756-RM2
1715-AENTR
1715-I/O
1715-I/O
1715-I/O
1715-I/O
1715-I/O
1715-I/O
1756 ControlLogix
Secondary Chassis
1756 ControlLogix
Primary Chassis
1715 Redundant I/O
System
1756 RM Cable
Ethernet
Switch
45239