KEYENCE BL-600 Series - Manual (Page 37)

Chapter 3 Connection and Installation
27
3
Connecting trigger input
The trigger input allows the BL-600 to start reading bar codes (turn on the laser
beam). To turn ON the trigger input, supply 15 to 26 V DC between the trigger input
terminals.
■ Connection to a photoelectric sensor manufactured by KEYENCE
Connecting the OK/NG output
The OK/NG output is used to differentiate between acceptable and unacceptable
results based on a comparison with preset data.
( ➮ See page 101.) It can also be used
to indicate whether or not the BL-600 Series successfully reads bar codes when
there is no preset data entered.
The OK/NG output is an NPN open-collector output.
■ Connection to a programmable logic controller (PLC) manufactured by
KEYENCE
15 to 26 V DC
+
+
TIM
BL-U2, N-42
COM OK
Contact or
solid-state
Circuit diagram
TIM
COM
Internal circuit
+
+
TIM COM OK
+
Photoelectric sensor
BL-U2, N-42
Brown (Red)
Black (White)
Blue (Black)
+
COM OK NG
Load
Load
Internal circuit
+
Load
OK/NG
COM
0001
0000
C
COM OK NG
+
PLC
Circuit diagram BL-U2, N-42
BL-U2, N-42
* Rated load: 30V DC max.
(100 mA)