Dwyer HFT - Manual (Page 3)

0-2000 Hz pulse output connections:
Wiring Instructions:
(Refer to Illustrations 6 & 7)
1) Move the programmable jumper on the circuit board
into the position closest to the meter’s inlet, as
shown in Illustration 7.
2) Connect the positive voltage source (+12 to +35
VDC) to terminal #1 of the DIN connector.
3) Connect terminal #2 of the DIN connector to the
negative side of the DC voltage source.
4) Connect the “G” terminal of the DIN connector to the
pulse input of the receiving device.
5) If the power source does not originate at the
receiving device, a wire will need to be connected
between the negative side of the voltage source and
the signal ground of the receiving device.
6) If the transmitter is operating properly, the green
LED on the circuit board will illuminate brightly when
power is applied to the unit.
1-5 VDC output connections:
Wiring Instructions:
(Refer to Illustrations 8 & 9)
1) Move the programmable jumper on the signal
conditioning board into the position closest to the
meter’s outlet, as shown in Illustration 9.
2) Connect the positive voltage (+17 to +35 VDC) to
terminal #1 of the DIN connector.
3) Connect terminal #2 of the DIN to the 1-5 VDC input
of the receiving device.
4) Connect one lead of a 249 Ω resistor to Terminal #2
as shown in Illustration 8. Connect to the other lead
to signal ground.
5) If the power source does not originate at the
receiving device, a wire will need to be connected
between the negative side of the voltage source and
the signal ground of the receiving device.
6) If the transmitter is operating properly, the green
LED on the circuit board will illuminate dimly at zero
flow and will increase in intensity as flow rate
increases.
NO CONNECTION
G
2
3
1
PIN #1
+12-35 VDC
PIN #2
DC GROUND
ELECTRICAL CONNECTIONS - 0-5 VDC
Illustration 4
PIN #3
0-5 VDC OUTPUT
PROGRAMMABLE JUMPER
IN POSITION CLOSEST
TO METER INLET
JUMPER POSITION - 0-5 VDC
Illustration 5
G
2
3
1
NO CONNECTION
PIN #2
1-5 VDC OUT
ELECTRICAL CONNECTIONS - 1-5 VDC
Illustration 8
PIN #1
+17-35 VDC
NO CONNECTION
249 OHMS
TO SIGNAL
GROUND
PROGRAMMABLE JUMPER
IN POSITION CLOSEST
TO METER OUTLET
JUMPER POSITION - 1-5 VDC
Illustration 9
"G" PIN
0-2000 Hz OUTPUT
G
2
3
1
PIN #1
+12-35 VDC
PIN #2
DC GROUND
ELECTRICAL CONNECTIONS - 0-2000 Hz PULSE OUT
Illustration 6
NO CONNECTION
PROGRAMMABLE JUMPER
IN POSITION CLOSEST
TO METER INLET
JUMPER POSITION - 0-2000 Hz PULSE OUT
Illustration 7