Rs-232C Interface (Only Rs-232C Model); Terminal Pin Assignment - Sony LT20A-101 Anleitung

9. RS-232C Interface (only RS-232C model)

The counter unit is connected to a personal computer to
use the computer to control the counter unit. (See "5-1-3.
RS-232C model".)

9-1. Terminal pin assignment

Rear panel of counter unit
8 7 6
5 4 3
2 1
RS-232C
7 6 5 4 3 2 1
A
RC-232C
FG +V 0V
DC IN
LT20A / LT30 Series
7 6 5 4 3 2 1
B
SIG. IN A
SIG. IN B
(Common)
I/O connector
1 2 3 4 5 6 7
Signal
• RS-232C
Pin
I/O Signal
No.
1 N.C
2 SG (Signal GND)
3 I RXD (Received data)
4 O TXD (Transmit data)
5 I CTS (Clear to send)
6 O RTS (Request to send)
7 +10 V
8 N.C
• RS-TRG (I/O connector (Common))
An "L" (ON) input 1 causes the measured values to be
output via the RS-232C connector.
Connected
equipment side
Signal
—
SG
TXD
＜
RXD
＞
RTS
＜
CTS
＞
DSR
33
(E)