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Specifications
Serial Interface (RS-232C and RS-422/RS-485) for COM1/COM2
Introduction
NOTE: For information on how to connect controllers and other types of equipment, refer to the
corresponding device driver manual of your screen editing software.
You can switch the communication method between RS-232C and RS-422/RS-485 via the
software.
The serial interface is not isolated. The SG (signal ground) and FG (functional ground) terminals
are connected inside this product. When the serial interface connector is D-Sub, connect the FG
wire to the shell.
ELECTRIC SHOCK AND FIRE
When using the SG terminal to connect an external device to this product:
Verify that a short-circuit loop is not created when you set up the system.
Connect the SG terminal to remote equipment when the external device is not isolated.
Connect the SG terminal to a known reliable ground connection to reduce the risk of damaging
the circuit.
Failure to follow these instructions will result in death or serious injury.
LOSS OF COMMUNICATION
All connections to the communication ports must not put excessive stress on the ports.
Securely attach communication cables to the panel wall or cabinet.
Failure to follow these instructions can result in injury or equipment damage.
NOTE: Use within the rated current.
RS-232C
D-Sub 9 pin plug connector
Product side
74
CAUTION
Pin No. RS-232C
Signal Name
1
CD
2
RD (RXD)
3
SD (TXD)
4
ER (DTR)
5
SG
6
DR (DSR)
7
RS (RTS)
8
CS (CTS)
9
CI (RI)/VCC
Shell
FG
DANGER
Direction
Input
Input
Output
Output
–
Input
Output
Input
Input/–
–
Meaning
Carrier Detect
Receive Data
Send Data
Data Terminal Ready
Signal Ground
Data Set Ready
Request to Send
Send possible
Called Status Display
*1*2
+5V±5% Output 0.25 A
Functional Ground (Common
with SG)
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