22
CONTOIL
®
DFM
Flow Meter
l/pulse
Hz
Pulse interval Pulse width
mA
VDC
(ml/pulse) (max)
(min.)
(max)
(Nominal)
Double flow meter DFM 8D
0.0125 (12.44) 15
46 ms
20 ms
10
12-24
Single flow meter DFM 20S
0.036 (36)
15
46 ms
20 ms
10
12-24
Single flow meter DFM 25S
0.100 (100)
15
46 ms
20 ms
10
12-24
Explanation of the power on the DFM-BC pins:
Pin number
VDC
mA max
1 (+)
12-24
10
2 (-)
GND
7 (+)
12-24
10
8 (-)
GND
Connection of non Aquametro flow meters
Pin number
Flow meter 1
2
GND
Connection for the “supply line” flow meter or for the flow meter for
3
+
direct consumption measurement
Flow meter 2
8
GND
Connection for the “return line” flow meter only if you have a
9
+
differential consumption measurement
Connection of the output signal
Pin number
External device
11
+
Connection of pulse output to other external device
12
GND
(Fleet Manager oder GPS-Tracking System)
Electrical scheme of the DFM signal
If you do not use the Board Computer (DFM-BC), please look at
your Fuel Counter Manual
you have purchased for a correct connection
of the DFM- flow meter wires.
