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Series 340 BN/MB Transmitter
Sensor Wiring
All flow sensor types connect to the four terminal headers labeled “Sensor Input”.
Comm LED
Sensor Inpu
t
Shield
Signal
Power Out
-
RE
F
+
_
Fa
ct
or
y Po
rt
NT
PD
PU
D.I.C.
Comm
Port
+
-
Po
wer In
AC C /DC
AC L /DC
Output
Pulse Out +
Pulse Out -
1
2
3
Temp
1
1
3
Temp
2
2
Input LED
Red
or
Black
or Signal -
Shield
(if applicable)
Series 200
or SDI Sensor
Model: 340
S/N 340-
XXXXXX
Figure 9: Sample Sensor Wiring Diagram
200 Series
Connect the red wire to sensor signal (+), black wire to sensor signal (-) and the bare wire to shield.
SDI Series
Connect the plus (+) terminal of the sensor to sensor signal (+) on the transmitter and the minus (-) terminal of the sensor to
sensor signal (-) on the transmitter. Connect the shield terminal of the sensor to the shield terminal of the transmitter.
Other Flow Sensors
The sensor input Power Out terminal supplies nominal 12V DC excitation voltage for 3 wire sensors. Connect sensor
and sensor signal - wires to transmitter terminals.
The 340BN/MB is very versatile, and can accept both Pulse and Zero Crossing Sine Wave flow sensors. Excitation voltage is also
provided for Three Wire Powered Sensors (Example: Hall Effect, of Badger 4000 Series).
See the Programming Section for configuration instructions.
Temperature Element Wiring
Appropriate wire types and proper shielding is required for accurate temperature readings.
Since Btu calculations are based on Delta T cable, in order to maintain a balanced system, T1 and T2 wire runs should be kept
to approximately the same length, and no to exceed 500 feet.