Serial Connector - Com4; Pinout - Honeywell Thor VX8 Reference Manual

Serial Connector - COM4

COM4 provides +12v on pin 9 when enabled.
Do not connect a serial bar code scanner to COM4 as this may damage the scanner, the Thor VX8 or both.
The COM4 serial connector is an industry-standard RS-232 9-pin "D" connector. The connector and its pin assignments are
shown below.

Pinout

Note: Pin 9 of the COM port can be switched between +12V and RI. See
2-14
Pin Signal Description
1 DCD Data Carrier Detect – Input
2 RXD Receive Data – Input
3 TXD Transmit Data – Output
4 DTR Data Terminal Ready – Output
5 GND Signal/Power Ground
6 DSR Data Set Ready – Input
7 RTS Request to Send – Output
8 CTS Clear to Send – Input
RI Ring Indicator – Input (default)
9 or or
+12VDC Power – 400mA max
VMT Manager.