Pro-face GP-3500L - Shapes of Com Ports

4.2 Shapes of COM ports
GP-3500S/L ST-3501T/C GP-4501T/TW
D-Sub 9 pin (plug)
RS-232C/422/485
D-Sub 9 pin (plug)
RS-232C
COM1
D-Sub 9 pin (socket)
RS-422/485
D-Sub 9 pin (plug)
RS-422/485
COM2
NOTE
・ If you use the connecting cable that was used for GP/ST-3500 series, see [4.5
Cable Diagram at the time of replacement].
・ When the both COM1 and COM2 ports on GP-3500S/L have RS-422/485 setting,
devices with RS-422/485 cannot be connected to the COM1 port after
replacement with GP-4501T/TW. See [4.5 Cable Diagram at the time of
replacement] as a countermeasure for this.
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