ViewSonic IFP9850 IFP9850 User Guide - Page 93

RS-232 Protocol, Description, RS232 Hardware Specification

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RS-232 Protocol This document describes the hardware interface spec and software protocols of RS232 interface communication between ViewSonic LFD and PC or other control units with RS232 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 RS232 protocol command. Description RS232 Hardware Specification ViewSonic LFD communication port on the rear side: 1. Connector type: DSUB 9-Pin Male (or 3.5 mm barrel connector) 2. Use of crossover (null modem) cable for connection 3. Pin Assignment: Female DSUB 9-Pin Male DSUB 9-Pin Pin # 1 2 3 4 5 6 7 8 9 Signal NC RXD TXD NC GND NC NC NC NC frame GND Remark Input to Display Output from Display Provide +5V/2A power for external specific dongle *3.0 3.5 mm barrel connector (alternative for limited space) Item Tip Ring Sleeve Signal TXD RXD GND Remark Output from Display Input to Display 93

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93
93
RS-232 Protocol
This document describes the hardware interface spec and soſtware protocols of
RS232 interface communica°on between ViewSonic LFD and PC or other control
units with RS232 protocol.
The protocol contains three command sec°ons:
•
Set-Func°on
•
Get-Func°on
• Remote control pass-through mode
NOTE:
Below, “PC” represents all the control units that can send or receive the
RS232 protocol command.
Descrip°on
RS232 Hardware Specifica°on
ViewSonic LFD communica°on port on the rear side:
1.
Connector type: DSUB 9-Pin Male (or 3.5 mm barrel connector)
2.
Use of crossover (null modem) cable for connec°on
3.
Pin Assignment:
Female DSUB 9-Pin
Male DSUB 9-Pin
Pin #
Signal
Remark
1
NC
2
RXD
Input to Display
3
TXD
Output from Display
4
NC
5
GND
6
NC
7
NC
8
NC
9
NC
Provide +5V/2A power for external
specific dongle *3.0
frame
GND
3.5 mm barrel
connector (alternative
for limited space)
Item
Signal
Remark
Tip
TXD
Output from Display
Ring
RXD
Input to Display
Sleeve
GND