Interface Specifications (Standard) - A&D BA-T Series Instruction Manual

15. Interface Specifications (Standard)

RS-232C specifications
Connector
Transmission system
Transmission form
Transmission rate
Signal format
1 character format
0
LSB
Start bits
D-Sub 9-pin assignments
Signal
Pin No. Direction
name
1 -
2 TXD
3 RXD
4 -
5 SG
6 DSR
7 RTS
8 CTS
9 -
Signal names other than TXD and RXD are names on the DTE side.
Wiring diagram
(when connected to a
personal computer)
*1 Used with some A&D peripherals. When connecting to other companies' products such as personal
computers and PLCs, do not connect the wires. Make sure a compatible cable is used, as using the
wrong connection cable may damage the device.
D-Sub 9-pin (male)
EIA RS-232C
Asynchronous, bi-directional, half duplex
approx. 5 times/second (5.21 Hz), approx. 10 times/second (10.42Hz)
Baud rate
Data bits
Parity
Stop bits
Code
1 2 3 4
Data bits
Description
Same potential as
-
SG *1
Output Transmit data
Input Transmit data
- N.C.
- Signal ground
Output Data set ready
Input Request to send
Output Clear to send
Output 12V output *1
Balance (DCE)
TXD
RXD
RTS
CTS
DSR
600, 1200, 2400, 4800, 9600, 19200, 38400 bps
7 bits or 8 bits
EVEN or ODD .................... At a data bit length of 7 bits
NONE ................................. At a data bit length of 8 bits
1 bit
ASCII
5 6 P
MSB
Parity bits
Pin No.
2
3
7
8
6
SG 5
125
At a data bit length of 7 bits
1 ..... -5 V to -15 V
0 ..... +5 V to +15 V
Stop bits
Inch screw #4-40UNC
RS-232C connector
Display unit (right side)
PC (DTE)
RXD
TXD
RTS
CTS
DSR
SG