5
Operation
Figure 5-1
Limiting inductive reaction voltage............................................................................................................. 5-2
Figure 5-2
Limiting capacitive reaction current............................................................................................................ 5-2
Figure 5-3
Model 7001 channel status display.............................................................................................................. 5-3
Figure 5-4
Model 7022 channel status display (slot 1) ................................................................................................. 5-3
Figure 5-5
Channel display organization ...................................................................................................................... 5-3
Figure 5-6
Model 7037 programming channel assignments......................................................................................... 5-4
Figure 5-7
Path isolation resistance .............................................................................................................................. 5-8
Figure 5-8
Voltage attenuation by path isolation resistance ......................................................................................... 5-8
Figure 5-9
Power line ground loops.............................................................................................................................. 5-9
Figure 5-10
Eliminating ground loops ............................................................................................................................ 5-9
6
Service Information
Figure 6-1
Channel resistance testing ........................................................................................................................... 6-3
Figure 6-2
Offset current testing ................................................................................................................................... 6-4
Figure 6-3
Contact potential testing.............................................................................................................................. 6-5
Figure 6-4
Channel to channel testing........................................................................................................................... 6-6
Figure 6-5
Common-mode isolation testing.................................................................................................................. 6-8
Figure 6-6
Testing an input or output channel .............................................................................................................. 6-9
Figure 6-7
Model 7037 block diagram........................................................................................................................ 6-10
Figure 6-8
Start and stop sequences............................................................................................................................ 6-11
Figure 6-9
Transmit and acknowledge sequence ........................................................................................................ 6-11
vi
Summary of Contents for 7037
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