3
2.2
Electrical Connections
XFM is supplied with a 15 pin "D" connector. Pin diagram is presented in
Figure b-1
.
2.2.1 Power Supply Connections
The power supply requirements for XFM transducers are: 11 to 26 Vdc, (unipo-
lar power supply)
DC Power (+) --------------- pin 7 of the 15 pin "D" connector
DC Power (-)
--------------- pin 5 of the 15 pin "D" connector
CAUTION: Do not apply power voltage above 26Vdc.
Doing so will cause XFM damage or faulty operation.
2.2.2 Output Signals Connections
CAUTION: When connecting the load to the output terminals, do not exceed
the rated values shown in the specifications. Failure to do so might cause
damage to this device. Be sure to check if the wiring and the polarity of the
power supply is correct before turning the power ON. Wiring error may cause
damage or faulty operation.
XFM series Mass Flow Meters are equipped with either calibrated 0-5 or cali-
brated 4-20 mA output signals (jumper selectable). This linear output signal rep-
resents 0-100% of the flow meter’s full scale range.
WARNING: The 4-20 mA current loop output is self-powered (non-isolated).
Do NOT connect an external voltage source to the output signals.
Flow 0-5 VDC or 4-20 mA output signal connection:
Plus (+) --------------------------- pin 2 of the 15 pin "D" connector
Minus (-)--------------------------- pin 1 of the 15 pin "D" connector
To eliminate the possibility of noise interference, use a separate cable entry for
the DC power and signal lines.
