5 connecting rs-232c – KEYENCE BL-700 Series User Manual
Page 25
Chapter 2 Connection and Installation
2
11
■ Connecting OK/NG output
The OK/NG output is used to differentiate between acceptable and unacceptable
results based on the comparison with the preset data, and to indicate whether or
not the BL-700 series successfully read bar codes.
➮ See P.44.
The OK/NG output is an open-collector output.
■ I/O circuit diagram
• Input circuit diagram
• Output circuit diagram
2.2.5 Connecting RS-232C
Pin assignment
COM
OK
NG
Load
Load
+
*Rated load: 30 V max. (100 mA)
TIM
2.4
kΩ
3.3 kΩ
Internal circuit
Load
OK/NG
COM
+
Internal circuit
13
1
25
14
D-sub 25-pin (female)
DCE specification (defined as terminal)
M2.6 screw (female)
Pin No.
Symbol
Function
Signal direction
1
FG
Frame ground
—
2
SD (TXD)
Sends RS-232C data
Output
3
RD (RXD)
Receives RS-232C data
Input
4
RS (RTS)
Ready to send RS-232C data
Output
(always ON)
5
CS (CTS)
Request to send RS-232C data
Input
6
DR (DSR)
Connected to pin No. 20 inside.
Input
7
GND (SG)
Signal ground
—
20
ER (DTR)
Connected to pin No. 6 inside.
Output