KEYENCE BL-700 Series - Manual (Page 21)

Chapter 2 Connection and Installation
2
7
2.1.3 Wiring I/O
■ Trigger input
The trigger input is used to signal the BL-700 to start reading (start laser emission).
The trigger input is a non-voltage input (TTL input is also available with negative
logic).
■ OK/NG output
This output signals whether the readout data is the same as the preset data. When
no preset data has been entered, the signal indicates bar code read status. It is an
NPN open-collector output.
➮ See P. 44
2.1.4 RS-232C connection
Wire the RS-232C as indicated below when connecting the BL-700 to a PC.
■ Connecting the computer with 25-pin
GND
TIM
1
5
5 VDC
10 kΩ
4.7
kΩ
Internal circuit
BL-700
Contact or
solid-state
3
2
8
7
5
9
BL-700
SD
CS
RS
GND
+5V
PC
2
3
4
7
6
5
20
SD RD
RD
RS
CS
SG
DR
ER
D-sub 25-pin (male)
M2.6 screw
D-sub 9-pin (male)
# 4-40 screw
GND
OK/NG
4/6
5
Load
BL-700
10 kΩ
* Rated load: 24 VDC
(30 mA) max.
+
Internal circuit