78
E
2.2 Rear of unit
2.3 Functions of connectors (rear panel)
ON / OFF switch
Pin 1
Ground
Pin 2
Input + 9 V
Pin 3
External contact input, signal = 0 Volt
Pin 1
Ground
Pin 2
Input + 9 V
Pin 3
External contact input, signal = 0 Volt
USB connector
Probes input
RS232 connector
Digital output connector
Socket for charging unit
Socket for external contact
ON / OFF Switch