OPTO 22 G4LC32, User Manual

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G4LC32 User’s Guide
Pin RS-485 2-Wire Mode Only
1
Transmit/Receive plus
(TX/RX +)
2
Transmit/Receive Minus
(TX/RX -)
3 Common Ground (GND)
4 No Connection (NC)
5 No Connection (NC)
6 Interrupt Plus (IRQ +)
7 Interrupt Minus (IRQ -)
Pin
RS-485 4-Wire Mode
Only
1 Transmit Plus (TX +)
2 Transmit Minus (TX -)
3
Common Ground
(GND)
4 Receive Plus (RX +)
5 Receive Minus (RX -)
6 Interrupt Plus (IRQ +)
7 Interrupt Minus (IRQ -)
Pin RS-232 Only
1 Fused +5V
2 Transmit (TX)
3 Receive (RX)
4
Request-to-Send
(RTS)
5 Clear-to-Send (CTS)
6 DTR (pullup to +9V)
7 Ground (GND)
COMMUNICATIONS AND CABLES
5-4