Omega FMA 4000 - Manual (Page 9)

5
PIN FMA 4000 FUNCTION
1 Common, Signal Ground For Pin 2
(4-20 mA return).
2 0-5 Vdc or 4-20mA Flow Signal Output.
3 Relay No. 2 - Normally Open Contact.
4 Relay No. 2 - Common Contact.
5 Common, Power Supply
(- DC power for 11 to 26 Vdc).
6 Relay No. 1 - Common Contact.
7 Plus Power Supply
(+ DC power for 11 to 26 Vdc).
8 RS485 (-) (Optional RS232 TX).
9 RS232 Signal GND (RS485 GND Optional).
10 Do not connect (Test/Maintenance terminal).
11 Relay No. 2 - Normally Closed Contact.
12 Relay No. 1 - Normally Open Contact.
13 Relay No. 1 - Normally Closed Contact.
14 Do not connect (Test/Maintenance terminal).
15 RS485 (+) (Optional RS232 RX).
Shield Chassis Ground.
Figure b.1 - FMA 4000 15 PIN “D” CONNECTOR CONFIGURATION
IMPORTANT NOTES:
Generally, “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 particular numbers displayed on the mating connector.
Make sure power is OFF when connecting or disconnecting any cables in
the system.
The (+) and (-) power inputs are each protected by a 300mA M (medium time-lag)
resettable fuse. If a shorting condition or polarity reversal occurs, the fuse will cut
power to the flow transducer circuit. Disconnect the power to the unit, remove the
faulty condition, and reconnect the power. The fuse will reset once the faulty con-
dition has been removed. DC Power cable length may not exceed 9.5 feet (3
meters). Use of the FMA 4000 flow transducer in a manner other than that spec-
ified in this manual or in writing from Omega, may impair the protection provided
by the equipment.
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