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RS-232 Protocol
This document describes the hardware interface and software protocols of RS-232
serial communication between the ViewSonic LED Display and computers or control
systems.
RS-232 Hardware Specification
ViewSonic RS-232 serial port on the lower left side:
1. Connector type: DB 9-Pin Female
2. Use of straight-through parallel cable for connection
3. Pin Assignment:
Female DB 9-Pin
RS-232 Communication Setting
- Baud Rate Select:
- Data bits:
- Parity:
- Stop Bits:
Pin # Signal
1
NC
2
TXD
3
RXD
4
NC
5
GND
6
NC
7
NC
8
NC
9
NC
frame
GND
115200bps (fixed)
8 bits (fixed)
None (fixed)
1(fixed)
134
Remark
Output from Display
Input to Display
GND
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