Omega FMA1800A User Manual page 7

The FMA1700A & FMA1800A flow meters 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 POWER SUPPLY WITH
VOLTAGE ABOVE 26 VDC. EXCEEDING SPECIFIED MAXIMUM POWER SUPPLY
VOLTAGE LIMIT MAY RESULT IN DEVICE PERMANENT DAMAGE.
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 FMA1700A/1800A TRANSDUCER
IMPORTANT NOTES:
In general, "D" Connector numbering patterns are standardized. There are, how-
ever, some connectors with nonconforming patterns and the numbering sequence
on your mating connector may or may not coincide with the numbering sequence
shown in our pin configuration table above. It is imperative that you match the
appropriate wires in accordance with the correct sequence regardless of the par-
ticular numbers displayed on your mating connector.
Make sure power is OFF when connecting or disconnecting any cables in the
system.
When connecting power to the FMA1700A/1800A mass flow meter via the DC
power jack, do not connect any power supply to the 9-pin "D" Connector. The DC
power jack has a center positive polarity.
When battery use is required to power the FMA1700A/1800A, use only the
optional battery and accompanying charger available from OMEGA7.
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