340 BN
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Series 340 BN/MB Btu Transmitter
Hydronic Energy Transmitter with RS-485 BACnet™ & Modbus® and
Scaled Pulse Output
Output
Pulse Out -
AC L /DC
AC C /DC
+
Power In
-
Pulse Out +
Output LED
Data
Industrial
Btu ENERGY METER
Temp 2
Temp 1
-
Input LED
Sensor Input
Model: 340 BN/MB
S/N 340-
Comm LED
005100
D.I.C.
Comm
Port
Factory Port
NT PDPU
REF
_
+
Power Out
Signal +
Signal
Shield
1
2
3
3
2
1
PN: 872035 (3-11)
IMPORTANT:
This manual contains important information.
READ AND KEEP FOR REFERENCE.
Installation & Operation Manual
Series 340 BN/MB Transmitter
Page ii
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Installation & Operation Manual
CONTENTS
Introduction .............................................................................................................................................. 5
Installation ................................................................................................................................................ 5
Mechanical installation ............................................................................................................................................... 5
Location ........................................................................................................................................................................ 5
Surface Mount Installation .......................................................................................................................................... 6
Wall Mounting .............................................................................................................................................................. 6
Din Rail Mounting ........................................................................................................................................................ 7
Temperature Sensor Installation ........................................................................................................................... 7
Direct Insert.................................................................................................................................................................. 7
Thermowell................................................................................................................................................................... 7
Hot Tap ......................................................................................................................................................................... 8
Electrical Installation................................................................................................................................ 8
Power Supply Wiring ................................................................................................................................................... 9
Sensor Wiring .......................................................................................................................................................... 10
200 Series ..................................................................................................................................................................... 10
SDI Series ..................................................................................................................................................................... 10
Other Flow Sensors..................................................................................................................................................... 10
Temperature Element Wiring ................................................................................................................................. 10
Thermistors .................................................................................................................................................................. 11
Resistance Temperature Detectors (RTDs) ............................................................................................................... 11
Pulse Output Wiring ............................................................................................................................................... 11
Connecting the RS-485 Buss .................................................................................................................................. 12
Communications Cable Wiring .............................................................................................................................. 13
Programming ........................................................................................................................................... 14
Making Connection Via DIC COM Port .................................................................................................................. 14
Flow Sensor Section ................................................................................................................................ 18
Temperature Sensor Section ................................................................................................................................. 18
Energy Calculation ................................................................................................................................................. 19
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Series 340 BN/MB Transmitter
Filter Coefficients.................................................................................................................................................... 19
Pulse Output ........................................................................................................................................................... 19
RS-485 Network Configurations ............................................................................................................................ 20
RS-485 Network Configuration – PULSE ONLY ..................................................................................................... 20
RS-485 Network Configuration – Modbus ................................................................................................................. 20
Modbus Register Map ................................................................................................................................................. 21
RS-485 Network Configuration – BACnet ............................................................................................................. 21
BACnet Object Map ..................................................................................................................................................... 22
BACnet Protocol Implementation Conformance Statement .................................................................................... 23
RS-485 Network Test .............................................................................................................................................. 24
Factory Default Settings ........................................................................................................................................ 25
Specications ........................................................................................................................................... 26
Power ....................................................................................................................................................................... 26
Flow Sensor Input ................................................................................................................................................... 26
Pulse type sensors ...................................................................................................................................................... 26
Sine wave sensors: ..................................................................................................................................................... 26
Temperature Sensor Input ..................................................................................................................................... 26
Pulse Output ........................................................................................................................................................... 26
Operating Temperature ......................................................................................................................................... 26
Weight ..................................................................................................................................................................... 26
SENSOR CALIBRATION ........................................................................................................................................... 26
UNITS OF MEASURE ................................................................................................................................................ 26
Flow measurement ...................................................................................................................................................... 26
Energy measurement .................................................................................................................................................. 26
PROGRAMMING ...................................................................................................................................................... 26
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Installation & Operation Manual
Introduction
The Badger Meter Series 340 BN/MB Btu transmitter is an economical, compact device for hydronic sub-metering applications.
It utilizes an RS-485 connection for Modbus® and BACnet™ communication protocols and a solid state switch for pulse output
representing either flow or energy.
The Series 340 BN/MB calculates thermal energy by integrating the liquid flow in a closed pipe system and the differential
temperature between the supply and return. The Series 340 BN/MB requires one flow sensor and two temperature sensors.
The temperature sensors can be two-wire 10 kΩ Type II Thermistors or 100 or 1000 Ohm RTDs that follow the IEC 751 curve.
The flow input may be provided by many of the Badger Meter line of flow sensors and other manufacturers' devices that
generate pulses or sine waves.
The onboard microprocessor and digital circuitry make precise measurements and produce accurate drift-free output. The
Series 340 BN/MB is programmed using the Badger Meter Windows® software and a Badger Meter Model A301 programming
cable. Calibration information for the flow sensor, units of measurement, communication protocol settings, and output
scaling may be downloaded prior to installation or in the field.
The RS-485 Modbus settings include Baud Rate, Address and RTU/ASCII.
The RS-485 BACnet is a MS/TP Slave device and includes address, Baud Rate, DeviceName, Device Instance Number and Max
Master Valve.
While the unit is connected to a PC or laptop computer real-time flow rate, flow total, both temperature readings, energy rate,
and energy total are available.
The Series 340 BN/MB transmitter features three LED’s to indicate flow sensor activity, RS-485 activity, and the pulse output.
The Series 340 BN/MB transmitter has an isolated solid state switch closure that is user programmed for units of energy or
flow. The output pulse width is adjustable from 10 mS to 5 sec.
The Series 340 BN/MB Btu transmitter operates on AC or DC power supplies ranging from 12 to 24 volts.
The compact cast epoxy body measures 3.65”(93mm) x 2.95”(75mm) and can be easily mounted on panels, DIN rails or
enclosures.
Installation
Mechanical installation
The Series 340 BN/MB transmitter may be surface mounted onto a panel, attached to DIN rails using adapter clips or wall
mounted using two optional enclosures.
Location
Although the Series 340 BN/MB device is encapsulated, all wiring connections are made to exposed terminals. The unit
should be protected from weather and moisture in accordance with electrical codes and standard trade practices.
In any mounting arrangement, the primary concerns are ease of wiring and attachment of the programming cable.
The unit generates very little heat so not consideration need be given to cooling or ventilation.
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Series 340 BN/MB Transmitter
Surface Mount Installation
The Series 340 BN/MB may be mounted to the surface of any panel using double sided adhesive tape or by attaching
fasteners through the holes in the mounting flanges of the unit.
1.60”
(40.6mm)
3.65”
(92.7mm)
Output
2.95”
(74.9mm)
+
AC L /DC
-
AC C /DC
Btu ENERGY METER
Sensor Input
Power Out
Signal +
Signal
-
Shield
Input LED
1
Temp 2
2
3
3
Temp 1
2
1
Power In
Model: 340 BN/MB
S/N 340-
Comm LED
Pulse Out -
Pulse Out +
Output LED
Data
Industrial
005100
D.I.C.
Comm
Port
+
Factory Port
NT PDPU
REF
_
.88”
(22mm)
.60”
(15mm)
.20”
(5mm)
Figure 1: Series 340 Dimensions
Wall Mounting
Optional metal and plastic enclosures are available to mount the Series 340 BN/MB to a wall when no other enclosure is used.
The enclosure is first attached to the wall using fasteners through its mounting holes.
After wiring, the transmitter may be attached to the enclosure with the terminal headers facing in using the slots in the
mounting flanges. As an alternate mounting arrangement, the Series 340 BN/MB may be fastened to the box cover using
double-sided adhesive tape.
5.125"
Top
4.50"
4.50"
Top
4.60"
3.25" 4.60"
Side
Page 6
Side
2.00"
Bottom
Figure 2: 340 Metal (left) and Plastic (right) Box Dimensions
2.25"
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Installation & Operation Manual
Din Rail Mounting
Optional clips snap onto the mounting flanges allowing the Series 340 BN/MB to be attached to DIN 15, 32, 35 mm DIN rail
systems.
Figure 3: Din Rail Mounting
Temperature Sensor Installation
Badger offers several styles of 10k Thermistors and 100 Ohm Platinum RTDs in both direct immersion and Thermowells. The
style selected depends on system requirements and pipe size.
Direct Insert
Generally for smaller pipe sizes direct insert sensors are used.
Figure 4: Direct Insert
Thermowell
For larger pipes that are more difficult to drain for service, thermowells are recommended.
Figure 5: Thermowell
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Series 340 BN/MB Transmitter
Hot Tap
For pipes that cannot be drained even for initial installation, we offer a Hot Tap version.
Model THT – available as 10k Thermistor version only.
Figure 6: Hot Tap
Electrical Installation
All connections to the Badger® Series 340 BN/MB are made to screw terminals on removable headers.
Wire
3/32" Flathead
Screwdriver
Series 300
Connector
Figure 7: Side View - Typical 300 Series Removable Connector Wiring
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Installation & Operation Manual
Power Supply Wiring
The Series 340 BN/MB requires 12-24 Volts AC or DC to operate. The power connections are made to the ORANGE header. The
connections are labeled beside the header. Observe the polarity shown on the label.
If a Badger Meter plug-in type power supply (Model A-1026 or A-503) is used, connect the black/white striped wire to the
terminal marked positive (+) and the black wire to the terminal marked negative (-).
DC -
or
AC Common
AC or DC
Power Supply
DC +
or
AC Load
AC L /DC
AC C /DC
Input LED
Power Out
Signal +
Signal
-
Shield
1
Temp 2
2
3
3
Temp 1
2
1
+
-
Sensor Input
Power In
Output LED
Model: 340
S/N 340-
Data
Industrial
Comm LED
Earth
Ground
Output
XXXXXX
Pulse Out -
Pulse Out +
Comm
Port
D.I.C.
REF
_
+
Figure 8: Sample Power Supply Wiring
NOTE: Included with every Series 340 BN/MB is a 340IK kit containing a screw, lock washer and nut to connect the Series
340 BN/MB to earth ground. Connect the earth ground lug of the Series 340 BN/MB to a solid earth ground with as short
a wire as possible. This will help prevent electrical interference from affecting the Series 340 BN/MB’s normal operation.
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