Sixteen inputs in two groups of eight: DI1–DI8, general purpose, and LIM1–LIM8 for limit and home functions. The two groups are electrically identical and differ only in which fused supply feeds them and in how the firmware uses them.

Parameter

Value

Type

Optocoupler input, sinking: active when the terminal is pulled to field ground

Isolation domain

Field

Input voltage

12–24 Vdc nominal, 26.4 V maximum

Input current

3.6 mA at 12 V, 7.6 mA at 24 V (design value)†

Series resistance

3 kΩ per input

Suitable sources

Dry contacts, NPN (sinking) sensors, open-collector outputs

Active polarity

Set in software

Isolation rating

2500 Vrms, 1 minute (optocoupler component rating)

Wiring: connect the field supply positive to J7.29 (or J7.3 for the limit/home group) and the field supply return to J7.30. Connect each input terminal through the switch or sensor to field ground. Two-wire sensors with significant leakage current are not suitable.