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How to Use External Control (cont.)
7 Using the serial communication
You can control the monitor from a personal computer or a dedicated controller via the RS-485 or RS-232C terminal. For
details on operating the monitor from the personal computer or the dedicated controller, consult your dealer.
Input terminal Cable Specifi cation Communications specifi cations
RS-485 Prepare a straight cable with
a RJ-45 connector.
See the table
below.
Baud Rate: 4800/9600/19200 (factory pre-set; 4800)
Data Bits: 8 bits
Parity: No parity
Stop Bits: 1 bit
Communication Cord: ASCII Cord
RS-232C Prepare a straight cable with
a RS-232C connector.
<RS-485 terminal>
This is a female terminal.
Pin No. IN terminal signal OUT terminal signal
1 TXD + TXD +
2 TXD – TXD –
3 RXD + RXD +
4 NC NC
5 NC IR. OUT
6 RXD – RXD –
7 5 V power* NC
8 GND GND
* The 5V power supply of the 7th terminal is for the controller
exclusively for this monitor. Do not use it for other devices.
1234 5678
<RS-232C terminal>
Pin No. Signal
1 —
2 RD (Receive Data)
3 TD (Transmit Data)
4 —
5 GND (Ground)
6 —
7 —
8 —
9 —
This is a female terminal.
05-39_GM-H40L1G-f.indd 3205-39_GM-H40L1G-f.indd 32 05.10.6 1:13:45 PM05.10.6 1:13:45 PM