Rs-232 Protocol; Description; Rs-232 Hardware Specification - ViewSonic ViewBoard IN01 Series User Manual

RS-232 Protocol

This document describes the hardware interface and software protocols of RS-232
interface communication between the ViewSonic LED Display and computers or
other control units with RS-232 protocol.
The protocol contains three command sections:
• Set-Function
• Get-Function
• Remote control pass-through mode
NOTE: Below, "PC" represents all the control units that can send or receive the
RS-232 protocol command.

Description

RS-232 Hardware Specification

ViewSonic LFD communication port on the rear side:
1. Connector type: DSUB 9-Pin Male (female or 3.5 mm barrel connector)
2. Use of crossover (null modem) cable for connection
3. Pin Assignment:
Male DSUB 9-Pin
(preferred)
Female DSUB 9-Pin
3.5 mm barrel connector
(alternative for limited
space)
Pin # Signal
1 NC
2 RXD Input to Display
3 TXD Output from Display
4 NC
5 GND
6 NC
7 NC
8 NC
9 NC
frame GND
Item Signal
Tip TXD Output from Display
Ring RXD Input to Display
Sleeve GND
124
Remark
Remark