21
CONTOIL
®
DFM
Electrical Connections and Specifications
For the DFM-8D
Explanation of the wires:
White Input voltage 12-24 VDC from the DFM-BC or from another source. If you use another source, make sure the
voltage is stable and filtered (that means,always between 12VDC and max. 28VDC, noise free)
Brown Ground (take the same ground like the 12-24 VDC source).
Green “Supply Line ” (SL). On this line a signal is send only if the rotary piston is rotated the correct way.
Yellow “ReturnLine” (RL). On this line a signal is send only if the rotary piston is rotated the correct way.
For the DFM 20S / 25S
Explanation of the wires:
White Input voltage 12-24 VDC from the DFM-BC or from another source. If you use another source, make sure the
voltage is stable and filtered (that means, always between 12VDC and max. 28VDC, noise free)
Brown Ground (take the same ground like the 12-24 VDC source).
Green “Supply Line ” (SL). On this line a signal is send only if the rotary piston is rotated the correct way.
Yellow Not used for this flow meter
Attention:
the signal is a pull down transistor, that means, whenever a signal should be generated, this line will go to ground (Open Drain).
For the DFM-BC
Explanation of the wires:
Pin 1:
Power supply for the flow meter. This connection is used to feed the following flow meters: DFM-8D, DFM-20S, DFM-25S
or
others.
Pin 2:
Ground for the flow meter. This connection is used as ground for the following flow meters: DFM-8D, DFM-20S,
DFM-25S and others.
Pin 3:
Input for Supply Line (SL).
This connection is used for the DFM-8D, DFM-20S, DFM-25S and other.
Pin 4:
Not used
Pin 5:
Input for Return Line (RL).
This connection is used exclusively. for the DFM-8D.
Pin 6:
Not used
Pin 7:
Power supply for the second flow meter. This connection is used to feed the following flow meters: DFM-20S, DFM-25S
and others. Use this connection for the Return-Line flow meter.
Pin 8:
Ground for the second flow meter. This connection is used as ground for the following flow meters: DFM-20S, DFM-25S
and others. Use this connection for the Return-Line flow meter.
Pin 9:
Input for Return Line (RL).
This connection is used for the following flow meters: DFM-20S, DFM-25S and others. Use this connection for the
Return-Line flow meter.
Pin 10:
Not used
Pin 11:
Signal for the external device
Connect the cable from the Fleet-Manager or GPS-Tracking-System.
Attention: the signal is a pull down transistor, that means, whenever a signal should be generated, this line will go to
ground (Open Drain).
Pin 12:
Ground for the external device.
Connect here the ground cable from the Fleet-Manager or GPS-Tracking-System.
Pin 13:
Plus Power Supply connection from the vehicle battery (12-24 VDC)
Pin 14:
Minus Power Supply connection from the vehicle battery
