A&D GF-2002A - 2 Interface Specifications; Rs-232 C

GX-A Series/GF-A Series Communication Manual 4 / 41
Connector: D-Sub9-pin（male）
Method of transmission: EIA RS-232C
Format of transmission: Asynchronous, two-way, half-duplex transmission
Data transmission rate: 5 times per second（ca. 5.21Hz）, 10times per second（ca. 10.42Hz）、
20 times per second（ca. 20.83Hz）
Linked with the setting value of the internal setting’s display rewrite cycle
Signal format Baud rate 600, 1200, 2400, 4800, 9600, 19200, 38400 bps
Data bits 7 or 8 bits
Parity EVEN、ODD （Data length 7 bits）
NONE （Data length 8 bits）
Stop bits 1 bit
Code ASCII
Format of 1 character
D-Sub9, pin arrangement
Pin No. Signal
name
Direction Meaning, remarks
1 - - N.C. (same potential
with SG)
2 RXD Output Transmitted data
3 TXD Input Received data
4 - - N.C.
5 SG - Signal ground
6 DSR Output Data Set Ready
7 RTS Input Request to Send
8 CTS Output Clear to Send
9 - Output N.C. (12V Output)
Connection diagram（when connecting to a PC）
2. Interface specifications
2-1. RS-232C
0 1 2
LSB
3546P
MSB
SpSt
Start bit
Data bits
Parity bit
Stop bit
0 +5V ~ +15V
1 -5V ~ -15V
Balance（DCE）
RXD
TXD
RTS
CTS
DSR
SG
PC（DTE）
RXD
TXD
RTS
CTS
DSR
SG
Inch screw #4-40UNC
1 2 3 4 5
6 7 8
9