AW Gear Meters FEM-03 - Manual (Page 12)

FEM-03 Flow Monitor
Operation and Programming Manual
11
Lower Connector Terminal Designations
DN 1 +15VDC OUT – power supply for the transmitter. Approx. 15VDC (power supply dependent),
approx. 20mA. max.
DN 2 DC COMMON – power supply common for the transmitter and serial port.
DN 3 FREQ. B INPUT – (model FEM-03A2 or -03Ax only). Frequency input from a transmitter. 0-4KHz,
4 volts minimum, 10KOhm maximum input impedance. Used as second frequency input, or for B
channel of A and B pickup sensor (B = 90° phase shifted signal) to detect flow direction.
DN 4 RS232 TX OUTPUT – transmit line of serial communication port. Connect to Pin 2 (RX in) on
DB9 serial port connector of PC. See Serial Communications on page 34 or PRINT Functions/Operations
on page 31 for more information regarding the use of the FEM-03 Serial Port.
DN 5 RS232 RX INPUT – receive line of serial communication port. Connect to Pin 3 (TX out) on DB9
serial port connector of PC. See Serial Communications on page 34 or PRINT Functions/Operations on
page 31 for more information regarding the use of the FEM-03 Serial Port.
DN 6 RESET TOTAL (labeled PREN) – momentary closure of RESET TOTAL terminal DN 6 with
terminal DN 7 DC COMMON resets the Job Total on closure and resumes totalizing upon opening the
connection.
DN 7 DC COMMON – common terminal used with RESET TOTAL terminal DN 6.
DN 8 LIMIT 1 COMMON – common contact of Limit 1 Relay (Form C). See NOTE below. See the FEM-
03 Connection Diagram on page 12 for limit connection details. See Relay Contact Ratings table on page
9 for contact ratings.
DN 9 LIMIT 1 N.C. – normally closed contact for Limit Relay 1 without power applied to FEM-03.
NOTE: The N.C. contacts become N.O. whenever the FEM has power applied with limit status OFF and
will CLOSE when limit status is ON. See LIMITS Display Mode on Page 18 and LIMITS Programming on
page 28 for information regarding limit display and programming.
DN 10 LIMIT 1 N.O. – normally open contact for Limit Relay 1 without power applied to the FEM-03.
NOTE: The N.O. contacts become N.C. whenever the FEM-03 has power applied with limit status OFF
and will OPEN when limit status is ON. See LIMITS Display Mode on Page 18 and LIMITS Programming
on page 28 for information regarding limit display and programming.