4
3 Operating and display elements
2
3
4
5
6
7
1
PNP
NPN
TEACH
Magnet
Reflection
Induction
1: LED display ‘PNP’
2: LED display ‘NPN’
3: ON/OFF button with status LED
4: Teach button
5: Test surface magnetic operating princi-
ple
6: Test surface reflector
7: Test surface inductive operating princi-
ple
3.1 Status LED
A permanent flashing of the green status LED (3) indicates low batteries. If the
output voltage drops to < 16 V DC, the unit automatically switches off.
When switching on while the batteries are low, the green status LED flashes twice
and the unit switches off.
u
Change the batteries or rechargeable batteries.
4 Set-up
u
Insert batteries or rechargeable batteries.
u
Alternatively, connect a standard 12 V DC power supply.
To switch the unit on, press the [ON/OFF] button briefly.
4.1 Insert batteries
u
Remove all connected units.
