Aalborg GFM User Manual
Page 7
3
Based on the GFM transducer’s serial number it may require a different power
sup-ply voltage. GFM flow meters with serial numbers below 340621-1 may
require 12 or 24 Vdc power supplies. Before connecting power supply check the
meter power supply requirements label located on the flow meter back cover. If
the power supply requirements label states that the power supply requirement is
12 Vdc, do not connect power supply with voltage above 15 Vdc. Exceeding spec-
ified maximum power supply voltage limit will result in device permanent damage.
The GFM flow meters with serial numbers above 340621-1 have universal power
input and can be used with any power supply voltage between +12 and +26 Vdc.
CAUTION: BEFORE CONNECTING POWER SUPPLY CHECK YOUR METER
SERIAL NUMBER AND POWER SUPPLY REQUREMENTS LABEL LOCATED ON
THE FLOW METER BACK COVER. DO NOT CONNECT 24Vdc POWER SUPPLY
UNLESS YOUR GFM METER WAS ORDERED AND CONFIGURED FOR 24Vdc.
EXCEEDING SPECIFIED MAXIMUM POWER SUPPLY VOLTAGE LIMIT MAY
RESULT IN DEVICE PERMANENT DAMAGE.
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PIN FUNCTION
1
Remote LCD display signal
2
0 to 5 VDC output indication
3
0 to 5 VDC common
4
Power supply, positive
5
Power supply, common
6
Remote LCD display reference
7
(unassigned)
8
4 to 20 mA output indication
self-powered (sourcing type,
non-isolated)
9
4 to 20 mA common (return)
FIGURE 2.a - 9-PIN “D” CONNECTOR PINOUTS FOR GFM TRANSDUCER.