User Manual version 2.1

OPEN (660) 120/140/150 5-51

5.2. COM Ports x 4

The OPEN (660) 120/140/150 (+) II features with four

onboard COM ports located at the rear side of the chassis,

ready to connect to a wide range of serial devices. COM1,

COM3 and COM4 are RS-232 and COM2 is RS-232/485,

selected via jumper setting. Each COM port is with

+5V/+12V power capabilities on pin 9, providing easy

accommodation to a broad range of serial devices.

The COM port 5V/12 power is selected via jumper setting

on the I/O board.

Please refer to the following for the 5V/12 power selection.

COM2
+5V+12VRI
4 26
135
(Default)
J8
COM2
6
COM1
4 2
J7
531
COM4COM3 COM1
J10J9 J12J11
J10
J14
COM4
Pin 1
Pin 9
J11
J7
COM1 COM3
J12
J8
COM2
J13
J9
COM3 COM4
J14J13
5 3 1
6 4 2
5 3 1
6 4 2
531
642
531
642
531
642
5 3 1
6 4 2
5 3 1
6 4 2
5 3 1
6 4 2
5 3 1
6 4 2

Pin# COM1 COM2 COM3 COM4

#1 J11 J12 J13 J14

#9 J7 J8 J9 J10

RI(default) +12V +5V

5 3 1
6 4 2
5 3 1
6 4 2
5 3 1
6 4 2