IFM Electronic VNB001, Operating Instructions Manual, Page: 7 / 27

7
UK
M12
Pin 1: L+ 9�6���30 V DC
Pin 2: Out 1 switching output or current output 4���20 mA
(configurable)
Pin 3: L -
Pin 4: Out 2
switching output
Pin 5: IN current input 4���20 mA
M8
Pin 1: VCC (5 V)
Pin 2: USB D-
Pin 3: L-
Pin 4: USB D+
5.1 M8/USB interface
► First connect the interface cable to the device and then to the USB interface of
the computer�
• The units have a serial number which can be read out using the PC software�
• The sensor can also be supplied via the USB interface�
• Read out and reset the history values�
Switching and analogue outputs are not supported if an USB power supply is used�
5.2 History values
The unit records history values� The memory interval is 5 min,� the maximum V
rms
value in this time range is recorded with a time stamp�
Recording period about 3 years, the oldest values will then be overwritten (ring
memory)�
The history can be read out and reset using the software VES004�
5.3 Real-time clock
The unit has an integrated real-time clock including a buffer battery for the time
stamp in the history memory� The time is synchronised with the system clock via
the PC software when the history is reset�