KEYENCE BL-700 Series - 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