Electrical Connection; Turbine Flow Sensor With Pulse Output - Sika Turbotron VTH 15 Serie Betriebsanleitung

5 Electrical Connection

Attention: We recommend to use only screened cables. Connect the shield on one side (the wire ends) on
ground.
Electrical connection with 4-pin-plug M12x1
Screw on 4-pin-plug M12x1 to sleeve and tighten plug with a starting torque of max. 1 Nm.

5.1 Turbine flow sensor with pulse output

The output signal of Turbotron is a flow-proportional frequency signal. The shape of the signal is a square
and its amplitude corresponds approximately with the supply voltage. It is an open collector signal, NPN- or
PNP-switching. The connected electronic instrument should have a loading resistance (pull-up or pull-down
resistor) of 5 kΩ in the inlet.
Schematic representation
A connection is made with three leads, the supply voltage must be connected between +U and GND
(earth), the output signal can be tapped between
or the pin allocation of the plug can be taken from the sketch on the type plate.
VTH with connecting cable
VTI (PNP-switching) with
connecting cable
VTI (NPN- switching) with
connecting cable
VTP with connecting cable
and GND. The color assignment of the supply cables
VTH with plug M12x1
VTI (PNP-switching) with plug M12x1
VTI (NPN-switching) with plug M12x1
BK = black
BN = brown,
BU = blue
GN = green,
WH = white,
R = resistor
13 EA-2700-d-e 03/2006