Rs-232 Protocol; Introduction; Description; Hardware Specification - ViewSonic CDE7500 Guia Del Usuario

8. RS-232 Protocol

8.1 Introduction

This document describes the hardware interface spec and software protocols
of RS232 interface communication between ViewSonic Commercial TV / Digital
Signage and PC or other control unit with RS232 protocol.
The protocol contains three sections command:
• Set-Function
• Get-Function
• Remote control pass-through mode
※ In the document below, "PC" represents all the control units that can sent or
receive the RS232 protocol command.

8.2 Description

8.2.1 Hardware specification

Viewsonic TV communication port on the rear side:
(1) Connector type: DSUB 9-Pin Male
(2) Pin Assignment
Male DSUB 9-Pin
(outside view)
[Special case]
3.5mm barrel connector
Pin # Signal
1 NC
2 RXD
3 TXD
4 NC
5 GND
6 NC
7 NC
8 NC
9 NC
frame GND
* Use of crossover (null modem) cable required for
use with PC
Pin # Signal
Tip TXD
Ring RXD
Sleeve GND
34
Remark
Input to Commercial TV or DS
Output from Commercial TV or
DS
Remark
Output from Commercial TV or
DS
Input to Commercial TV or DS