Rockwell Automation 1753-IB16XOB8 GuardPLC 16-Digital Inputs and 8-Digital Outputs Installation Instructions - Manual (Page 18)

18 GuardPLC 16-Digital Inputs and 8-Digital Outputs Module
Publication 1753-IN011A-EN-P - October 2005
3-pole Connection With Line Monitoring
Two 2-pole channels can support dual channel devices with only a single reference
connection. If line monitoring is required, the channels must be configured in pairs,
using the DO[xx][xx].in pairs system parameter. There are four pairs allowed:
• channels 1 and 2,
• channels 3 and 4,
• channels 5 and 6,
• and channels 7 and 8.
Line monitoring is accomplished by switching off one channel while the second
channel is tested for wiring faults.
A detected line fault is reported by the module’s error codes.
ATTENTION
Inductive loads must be connected with a protection diode on the
load in 3-pole connection.
Load
(drive, valve)
1753-IB16XOB8