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8
Input Connections (J2, J3, J4)
Input connections on Terminals J2, J3 and J4 are all Contact closure inputs. The Inputs can be individually
configured (via DIL switch SW1) to be Normally Open or Normally Closed. Figures 4 and 5 show how to
make Input connections. All Input connections are power limited and supervised.
The maximum cable length between the input device and the IRM must not exceed 3 metres.
Note: The triggering resistor used can be a 470Ω resistor (shown) or a 680Ω resistor.
Figure 4
–
Normally Open Input Connection
Figure 5
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Normally Closed Input Connection
