Honeywell DPR180 Product Manual page 26

2. INSTALLATION
2.5.1 Digital input signals. (DI)
If an optional digital input board is installed, connect the wiring as shown in Figure 2-1.
Slot location X = J to P
Figure 2-1 Digital input signal wiring (DI)
If 2 digital input boards are fitted, repeat the above procedure for the second board.
Note: Use dry contacts, voltage free, designed to switch 5 mA at 5 V.
Up to 36 digital inputs allowed.
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