AC310 Universal AC Drive Service Manual
3.3 Detection and Maintenance Optocoupler Unit Circuits
1. Circuit descriptions
⚫ Function: External multi-function terminal inputs and outputs are optically isolated
from the internal signals of the control board.
⚫ Ordinary Optocoupler: EL3H7 (relay, Y output); EL3H4 (5-way X input), PUL
input and ordinary input X5 multiplexed.
Note 1: At this time, the maximum support for 5KHZ output, external PG card PUL
input support for a maximum of 50KHZ)
Note 2: When PLC connects to 24V, X input is active low; when PLC connects to COM,
X input is active high.
The following are the multi-function terminal input, Y terminal output, and relay output
circuits.
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