Industrial HMI Touch Panel Hardware Manual
M2I Corporation
11-35, Simin-daero 327beon-gil, Dongan-gu, Anyang-si, Gyeonggi-do 14055, Korea, Tel: +82-70-465-3366, Fax: +82-31-465-3355, www.m2i.co.kr
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Chapter 5 External Device Interface
In order for the main unit to communicate with an external device, it is necessary to connect the two devices
by referring to the following.
5.1 Serial Communication Specifications
5.1.1 RS-232C
Items
Contents
Protocol
Full Duplex
Synch
Asynchronous
Communication Distance
About 15m
Type of Connection
1:1
Control Code
ASCII Code or HEXA Code
Transmission Speed
2400,4800,9600,19200,38400,57600,76800,115200 bps
Data Type
Data Bit
7, 8 bit
Parity Bit
NONE, ODD, EVEN Parity
Stop Bit
1, 2 bit
Modular Jack
DSUB 9pin
5.1.2 RS-422/485
Items
Contents
Protocol
Full Duplex/Half Duplex
Synch
Asynchronous
Communication Distance
About 500m
Type of Connection
1:N(N ≤ 31)
Control Code
ASCII Code or HEXA Code
Transmission Speed
2400,4800,9600,19200,38400,57600,76800,
115200 bps
Data Type
Data Bit
7, 8 bit
Parity Bit
NONE, ODD, EVEN Parity
Stop Bit
1, 2 bit
Modular Jack
DSUB 9pin
5.1.3 COM1 Connector pin number and Signal name
Type
Pin No.
Signal
Direction
Meaning
9Pin Female
1
NC
-
Not Available
2
RD(RxD)
Input
RS-232C Receive Data
3
SD(TxD)
Output
RS-232C Send Data
4
NC
-
Not Available
5
SG
-
Signal Ground
6
NC
Not Available
7
*1)
Power
-
+5V, 0.2A
8
*2)
GND
-
Power Ground
9
NC
Not Available
*1, *2)
When need VCC for external equipment, use 7.VCC and 8.VCC GND that output is 0.2A
