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RS-232C Interface
1. Hardware specifications
1) Interface specifications
Connector: D-SUB, 25P, DCE specifications (straight cable supported)
Pin No.
Signal
Description
1
FG
Protective ground
2
SD (TXD)
Transmitted data
3
RD (RXD)
Received data
4
RS (RTS)
Request to send
5
CD (CTS)
Clear to send
6
DR (DSR)
Data set ready
7
SG
20
ER (DTR)
Signal ground
Data terminal ready
Example of wiring connections
Personal computer
Frame FG
3
SD
(TXD)
2
RD
(RXD)
7 RS
(RTS)
8
CD
(CTS)
6
DR
(DSR)
5
SG
4
ER
(DTR)
VTR
1
FG
2
SD (TXD)
3 RD
(RXD)
4
RS
(RTS)
5
CD
(CTS)
6 DR
(DSR)
7 SG
20
ER
(DTR)
2) Communication parameters
The VTR’s communication parameters are shown below. To change any of these parameters, make the
changes using the menu.
Baud rate : 9600 bps
Bit length : 8 bits
Stop bit : 1 bit
Parity
: None
31