Specifications

5. Optional interface
49
RS-232C interface(option)
The RS-232C is an interface to take in RS-232C spec data, codes and command signals to the M252A.
RS-232C pin assignment
Signal level RS-232C spec
Transmission distance Approx. 15m
Transfer system
Start/stop synchronous system，full duplex communications
Transfer speed 1200, 2400, 4800 or 9600 bps selection
Bit configuration Start bit: 1
Character length: 7 or 8 bit selection
Stop bit: 1 or 2 bit selection
Parity bit: Non, odd or even selection
Code ASCII
Connector D-Sub 9pin male (CN33)
Necessary settings 46: RS-232C transmission rate
47: RS-232C parity bit
48: RS-232C data/stop bit
49: RS-232C terminator
50: RS-232C answer mode
1
2
3
4
5
6
7
8
9
RxD
RTS
CTS
SG
DTR
TxD
1
2
3
4
5
6
7
8
9
RxD
RI
CTS
RTS
DSR
SG
DTR
TxD
PC or
Crossing cable
D-Sub9pin
female
D-Sub9pin
female
DCD
* This connection diagram shows cables in the case where the PC in use is DTE (data
terminal equipment). If the M252A is connected to DCE (data circuit terminator
equipment) such as a modem, use straight type cables.
* Also, recheck the connector shape and signal lines (pin assignment) of the equipment you
use before preparing cables.
No. I/O Description
1
‐
(Unused)
2INRxD
3OUTTxD
4 OUT DTR
5*SG
6
‐
(Unused)
7OUTRTS
8OUTCTS
9
‐
(Unused)
(Unused)
(Unused)
(Unused)
the like
M252A