62-0391-01
Class 3400 Meter
ADVANCED KWH/DEMAND METER
WITH COMMUNICATIONS
INSTALLATION INSTRUCTIONS
E-Mon
850 Town Center Drive
Langhorne, PA 19047
(800) 334-3666
www.emon.com
info@emon.com
CLASS 3400 METER
Dear Valued Customer,
We are pleased that you chose to buy one of our products, and want you to be just as
pleased with owning it. Before installing your new E-Mon product, please read the
information on the following pages carefully.
We believe that you will find the E-Mon D-Mon meters easy to install and to use for
monitoring and evaluating your electrical usage.
To be sure that you are 100% satisfied with your products, we provide toll-free
technical and sales support Monday through Friday, 8:00 am to 7:30 pm, EST:
(800) 334-3666. You may also reach us via email at info@emon.com.
If you have questions, we can handle them quickly and effectively with a telephone call.
Please let us try to help you BEFORE you remove your meter. And to help us help you,
we ask that you have all relevant information on hand when you call (model or part
numbers, nature of difficulty, etc.)
Be sure to forward this manual to the owner after installation is complete, so that they
may use it as a reference guide when reading the E-Mon D-Mon meter.
Thank you.
62-0391-01 2
CLASS 3400 METER
TABLE OF CONTENTS
Section 1.0 Introduction 4
Section 2.0 Internal Electronic Assemblies 5
Section 2.1 Main Power Board 5
Section 2.2 Display Board 6
Section 3.0 Meter Technical Specifications 7
Section 4.0 Safety Label Definitions and Information 10
Section 5.0 Precautionary/Safety Information 11
Section 6.0 Meter Installation 12
Section 6.1 Mounting the Class 3400 Meter 12
Section 6.2 Main Power Board Connections 12
Section 6.3 Phasing of Line Voltage 14
Section 6.4 Current Sensor Installation & Wiring 14
Section 6.5 Main Power & Current Sensor Wiring Diagram 17
Section 6.6 Line Voltage/Current Sensor Diagnostics 17
Section 6.7 RS-485 Wiring 19
Section 6.8 RS-232 Communications 20
Section 6.9 Modem Wiring 23
Section 6.10 Modbus RTU Wiring 26
Section 6.11 BACnet Wiring 27
Section 6.12 Connecting Class 3400 Meters to USB Key using RS485 27
Section 6.13 Ethernet Communications 28
Section 7.0 Multiple-Load Monitoring 30
Section 8.0 Preventative/Scheduled Maintenance 32
Section 9.0 Lithium Battery Replacement 32
Section 10.0 Class 3400 Meter Features 34
Section 11.0 Reading The Class 3400 Meter Display 37
Section 12.0 Class 3400 Meter Expansion Board 38
Section 12.1 Expansion Board Connections 39
Section 12.2 Pulse Type and Valve 39
Section 12.3 Load Control 41
Section 13.0 Frequently Asked Questions 42
Section 14.0 Protocol Descriptions 44
Section 15.0 Meter Limited Warranty 49
3 62-0391-01
CLASS 3400 METER
CAUTION
WARNING
1.0 INTRODUCTION
The E-Mon D-Mon® Class 3400 meter is a 3-element meter with communications. The
device is used to monitor electric power usage of individual loads after the utility meter
and store kW and kVAR data for automatic meter reading. The Class 3400 meter is
dual protocol capable and provides both RS485 and Ethernet communications.
Installation must only be performed by qualified personnel and in accordance with
these instructions and all applicable local and national electrical codes. E-Mon and its
representatives assume no responsibility for damages or injury resulting from the
improper installation of this meter.
Verify the input voltage rating and configuration on the unit panel label to ensure that it
is suitable for the intended electrical service. Class 3400 meters labeled for 120/208V
service MUST NOT be installed on service feeds of 277/480 volts or 347/600 and vice
versa.
Verify that the Class 3400 meter’s current sensors are sized suitably for the load to be
monitored. Compare the color of the arrows on the current sensors to the chart below
to confirm the correct current sensor is being used.
Sensor Arrow Color Code Sensor Rating
Brown 100 A
Red 200 A
Yellow 400 A
Black 800 A
Blue 1600 A
White/Black 3200 A
Internal circuit card components are extremely sensitive to electrostatic
discharge. Prior to handling or touching internal circuitry, discharge any static
buildup on your person. To discharge yourself, touch a grounded metal object
such as conduit or an earth grounded metal enclosure.
Use of this instrument, the E-Mon D-Mon Class 3400, in a manner inconsistent
with this manual or not specified by the manufacturer in writing, can cause
permanent damage to the unit and/or serious injury to the operator. The
protection and safety features provided by this equipment may become
impaired or otherwise compromised.
NOTE: If any trouble arises during installation or functional verification operations, do
not immediately remove unit. Before removing the unit, contact E-Mon’s technical support department at (800) 334-3666. E-Mon’s technical department
will assist you in detailed troubleshooting of the Class 3400 installation and
assist you in getting the unit operating correctly.
62-0391-01 4
CLASS 3400 METER
MAIN POWER
BOARD
DISPLAY
BOARD
M33315
M33271
TB1
POSITIONS
POSITIONS
6-10
PHASE LOSS
TB42
J3
J4
J8
2.0 INTERNAL ELECTRONIC ASSEMBLIES
The units are comprised of two major subassembly boards, the main power board and
the display board. Both circuit boards are mounted inside a NEMA 4X enclosure.
Fig. 1. Internal Electronic Assemblies.
2.1 Main Power Board
Connections to this board include the MAIN Power Input and current sensors.The
MAIN Power Input terminals are positions one through four on the four position screw
terminal block, TB1. These terminals are covered with a protective shield for safety
purposes. The current sensor assemblies interface to the TB1 positions 6 thru 10; care
must be exercised to ensure that each current sensor is connected to the correct
terminals. One three terminal screw connector (RS485) is for RS-485 communications.
One two terminal screw connection (output) is for a pulse output. One RJ-45 jack (J8)
is provided for 10/100-baseT Ethernet.
Fig. 2. Main Power Board Connections.
5 62-0391-01
CLASS 3400 METER
M33320
DOWN
UP
SELECT
MENU
2.1 Main Power Board (continued)
There are also two headers present for adding option cards. Header J3 is 20 positions
for use with an I/O board with up to two relays, two pulse inputs and two pulse out puts.
2.2 Display Board
The display board connects to the main power board via a flex ribbon cable and the
board mounts on the inside of the housing door.
No additional connections to the display board are required. The display board’s LCD
readout indicates the metered values as well as errors associated with the Class 3400
meters, such as phase loss or sensor error conditions.
62-0391-01 6
Fig. 3. Display Board.
CLASS 3400 METER
M33317
EXAMPLE:
E 34 208 400 R 05 X
CLASS 3400 METER
INPUT VOLTAGE (208V)
CURRENT RATING (400A)
ENCLOSURE (4X)
EZ7/BACnet IP/NO MODEM
E-MON
EXPANSION PACKAGE
KIT
SPLIT CORE SENSORS
3.0 METER TECHNICAL SPECIFICATIONS
Ordering Information: Define brand, class, input voltage, current sensor rating,
enclosure, protocols/options, expanded feature package, and sensor type in the format
A-BB-CCC-DDDD-E-FF-G-HHH, where:
A = Brand: E for E-Mon, H for Honeywell
BB = designates Class: 3200 (32), 3400 (34), or 5000 (50) meter
CCC = input voltage: (208, 480, 600)
DDDD = current sensor rating: (100, 200, 400, 800, 1600, 3200)
E = enclosure: J = metal (type 1), R = non-metallic (type 4X)
FF= protocol/options:
RS-485 Ethernet Option
01 EZ7 EZ7 Ethernet None
02 Modbus RTU EZ7 Ethernet None
03 BACnet MS/TP EZ7 Ethernet None
04 EZ7 Modbus TCP/IP Ethernet None
05 EZ7 BACnet IP Ethernet None
06 Modbus RTU Modbus TCP/IP Ethernet None
07 Lonworks FT-10 EZ7 Ethernet None
08 Lonworks FT-10 Modbus TCP/IP Ethernet None
09 EZ7 EZ7 Ethernet Modem
10 EZ7 Modbus TCP/IP Ethernet Modem
11 EZ7 BACnet IP Ethernet Modem
G = Expanded Feature Package: package = X, no package = “blank”
(on Class 3400 only)
HHH= Sensor Type: kit=split-core, scs= solid-core, non-supplied blank”
7 62-0391-01
CLASS 3400 METER
3.0 METER TECHNICAL SPECIFICATIONS
(CONTINUED)
Input Voltage
Configuration
Mains Voltage Input Up To 600 VAC RMS Available
Input Power 6 VA Maximum Rating
Current Sensor
Rating
Power Factor 0.5 Leading Or Lagging
Line Frequency 50-60 Hz
Metering Accuracy ANSI C12.20
Voltage Operating
Range
Temperature Range -20 C To +50 C (Standard indoor enclosure):
Relative Humidity
Range
Altitude 2000 Meters Maximum
Voltage Overload +25% Continuously: +100% For 20 Cycles
Current Sensor
Overload
Pollution Degree Degree 2 In Accordance With IEC 664
Installation
(Overvoltage)
Category
Measurement
Category
Enclosure Material UL Type 1 or Type 4X
Display Readout 4-line LCD
Standard Ranges 4-Wire Wye 208 VAC: 100, 200, 400, 800,1600 Amp
Modem Interface Cable: UL-listed/rated telephone
3-wire (Delta) Or 4-wire (Wye)
Up To 3200 Amps RMS AC Available
+/-10% Of Rated Load
0-95% Non-condensing
100% For 1 Minute Without Damaging Meter
Category III
Category III
3-Wire Delta240 VAC: 100, 200,400,800,1600 Amp
4-Wire Wye 480 VAC: 100, 200, 400, 800,1600 Amp
3-Wire Delta480 VAC: 100, 200,400,800,1600 Amp
4-Wire Wye 600 VAC: 100, 200, 400, 800,1600 Amp
cord, 4-conductor, 300 VAC,
stranded conductors 22-26
AWG.
Cable Connector: RJ-11 IDC termination
Ckt Input Isolation 5.3K VAC
Baud Rate: 9600
62-0391-01 8
CLASS 3400 METER
3.0 METER TECHNICAL SPECIFICATIONS
(CONTINUED)
RS-485 Serial
Communications
Ethernet
Communications
Cable
Load Control
Contacts:
Recommended
In-line Fuse
Battery Cell Description: Non-rechargeable cell used for
Cable: UL-listed stranded conductors,
22-26 AWG.
Input/Output Voltage: Ground-isolated +/-5.4VDC
Cable Connector: Screw terminal termination
Circuit Input Isolation: 5.3kVAC
Max Cable Distance: 4000 feet
Max Network Nodes: 64 cabling nodes (including
master)
Baud Rate: 9600
Cable: UL-Listed CAT-5e cable, 8-
conductor, stranded 24 AWG
Cable Connector: RJ-45 termination
protocol: 10/100 base T
Cable Distance: 450 feet
Contact Closure: Set by user
Contact Rating: 28Vdc@10A; 240VAC@10A
Mating Connector: Weidmuller PN 1526510000
Isolation Voltage: 1.5K VAC for 1 minute
Manufacturer: Littlefuse
Mfg. Part No: KLDR.100
Rating: 100mA, time-delay, 600VAC
cartridge fuse
memory retention
Manufacturer: Panasonic
Mfg Part No: CR2032
Working Voltage: 3 Vdc
Current Capacity: 225 mAHr
Electrolyte: Manganese Dioxide Lithium
9 62-0391-01
CLASS 3400 METER
4.0 SAFETY LABEL DEFINITIONS AND
INFORMATION
The Class 3400 meter may contain one or more of the following labels. Operator(s)
should familiarize themselves with the meaning of each label to minimize risk.
The presence of this label is a cautionary indicator identifying a
danger risk. The manual should be consulted prior to proceeding.
The presence of this label indicates an electrical shock hazard exists
in the location or area where the label is placed. Prior to proceeding,
the MAINS power must be disconnected and the manual consulted for
safety information.
62-0391-01 10
CLASS 3400 METER
CAUTION
WARNING
WARNING
WARNING
5.0 PRECAUTIONARY AND SAFETY
INFORMATION
Internal circuit card components are extremely sensitive to electrostatic
discharge. Be careful not to touch internal circuitry prior to discharging any
static buildup on your person. To discharge yourself, touch a grounded metal
object such as conduit or an earth-grounded metal enclosure.
High voltages present on main PCB terminal block TB1 screw terminals. Risk
of serious injury and/or electrical shock exists. Prior to performing any wiring
operations, review all contents of the user manual and de-energize the MAINS
power switch. Only qualified personnel should perform installation wiring.
Installation wiring must comply with all local and national electrical codes.
Failure to ground the enclosure creates a possible shock hazard. Do not
operate the Class 3400 meter without a protective earth wire attached securely
to the PE terminal screw. After installing protective earth wiring, secure the
screw tightly (7 N-m torque.)
NEVER open front panel of unit while unit has MAINS power applied. Failure to
comply can increase the risk of serious injury and/or electrical shock.
11 62-0391-01
CLASS 3400 METER
WARNING
6.0 METER INSTALLATION
6.1 Mounting the Class 3400 Meter
Use appropriately sized mounting hardware to fasten the meter enclosure to the
selected mounting surface. The four housing mounting holes are centered 8.75” H x 4”
W for the CL3400.
NOTE: Units housed in UL Type 1 enclosures must only be installed in indoor envi-
ronments, where they will not be affected by the elements.
6.2 Main Power Board Connections
1.
Installing a temporary ground for ESD protection:
With all circuits de-energized, connect a temporary protective earth ground connection for ESD protection. Prior to performing any unit wiring, be sure to discharge any static on your person.
2.
Installing the Class 3400 protective earth ground:
Connect an earth ground wire to the Class 3400 protective earth ground lug with
a torque of 7 N-m.
Failure to attach the protective earth ground wire securely to the meter creates
a potential shock hazard. Do not operate the meter without a protective earth
ground connection securely installed.
Wire Entry:
3.
CL3400 meters are supplied with two 3/4” conduit K.O.s on the bottom of the 4X
enclosure for all wiring. The Type1 enclosures are supplied with three 3/4” conduit K.O.s.
Route the appropriate cabling to and through the respective enclosure opening.
After installing the conduit fitting and conduit, verify that each conduit slip nut is
securely tightened to its respective conduit fitting. Any unused openings must be
sealed with a UL rated plugging device suitable for the rating of the enclosure.
Unit MAINS Wiring:
4.
The first four positions of terminal block TB1, located at the bottom left corner of
the main power board, are clearly labeled Phase A, B, C, N (neutral). Earth
Ground MUST be connected to the PCB mounting screw in the lower right corner.
Connect the NEUTRAL wire to the appropriate terminal block position.
62-0391-01 12
CLASS 3400 METER
6.2 Main Power Board Connections (continued)
Fig. 4. Terminal Block TB1.
NOTE: For 3-wire delta-type meters, Do NOT connect the NEUTRAL wire. Remove
the terminal block screw for this position.
a. Connect the NEUTRAL wire to the appropriate terminal block position.
b. Earth Ground: Connect the Earth Ground to the PCB mounting screw in the
lower right corner.
c. External Switch Mechanism/In-Line Fuse Installation
To ensure a safe installation, the Class 3400 meter requires an external
switch mechanism, such as a circuit breaker, be installed on the meter’s
MAINS input wiring. The switch mechanism must be installed in close proximity to the meter and easily reachable for the operator. This device must
also be marked as the disconnecting device for the Class 3400 meter. Install
1/10 Amp Slow Activation in-line fuses with the suitable voltage rating for
each conductor phase at the MAINS input to the meter. The fuses must be
labeled to indicate voltage and current rating as well as element characteristics.The fuse element must be slow activating type.
d. Connect the three AC main power wires (Phases A, B and C) to their respec-
tive positions as labeled on terminal block TB1 and tighten to 7 in-lb. After all
conductors are connected to each of their respective terminal block positions
and tightened down, verify that each terminal block screw is securely fastened by gently tugging on each conductor.
Verify that no conductor wires are frayed or shorting to adjacent terminal
block positions.
e. Turn ON the AC main power input. The meter display will light up and scroll
through 7 displays. Each display is visible for 5 seconds. Display screens are
as follows:
Screen 1 - Total kilowatt-hours (kWh) consumed
Screen 2 - Peak demand (kW) with date & time stamp
Screen 3 - Actual load (kW)
Screen 4 - Average current (amps) per phase
Screen 5 - Average voltage (volts) per phase
Screen 6 - Average voltage phase to phase
Screen 7 - Power factor (PF) per phase
13 62-0391-01
CLASS 3400 METER
6.2 Main Power Board Connections (continued)
f. Verify the voltage readings on Screen 5 using an AC voltmeter. Typical read-
ings shown below are measured phase to neutral for 4 wire and phase to
phase for 3 wire. Readings should be +/- 10% of nominal.
Meter Type Nominal Voltage Limits (+/- 10%)
208/240V, 3ø, 4 Wire 120 VAC (L-N) 108 to 132 VAC
480V, 3ø, 4 Wire 277 VAC (L-N) 249 to 305 VAC
600V, 3ø, 4 Wire 347 VAC (L-N) 312 to 380 VAC
208/240V, 3ø, 3 Wire 240 VAC (L-L) 216 to 264 VAC
480V, 3ø, 3 Wire 480 VAC (L-L) 432 to 528 VAC
NOTE: Meters are powered by phases A and B. The displayed voltages will be the
measured AC voltage between phases.
6.3 Phasing of Line Voltage
The 3-phase AC power input must be in proper phase sequence. If the sequence is
incorrect or a phase is missing, there will be a message on the meter’s display: “PH
Sequence Error” or “PH Missing:. (Refer to the section on Line Voltage Diagnostics if
this message is present.) When the line voltage is connected correctly, the meter’s
display will be blank (no message.)
Wait for the meter display to scroll to the voltage display. Verify that the meter reads
correct voltages on all three phases. Repeat Step F.
Once the meter displays the correct line voltages and there are no error messages,
you are ready to connect the current sensors to the meter. Before continuing with the
installation, verify that the six screens display as follows:
Screen 1 (kWh): Should read 0.0 kWh; if not, should be reset.
Screen 2 (kW Peak Demand): kW peak should read 0.0 kW. There will not be a date/
time stamp yet. If there is a kW peak recorded, it
should be reset later
Screen 3 (kW Load): Should read 0.0 kW load.
Screen 4 (Amps per Phase): There should be 0.0 on all three phases.
Screen 5 (Average AC Volts): See Step F.
Screen 6 (Average AC Volts): See Step F.
Screen 7 (Power Factor): There should be 0.0 PF on all three phases.
NOTE: The meter will be reset later via the software during “startup” procedures.
6.4 Current Sensor Installation & Wiring
Once the AC voltages have been confirmed to be within acceptable limits, you are
ready to install the current sensors. TB1, positions 5 and 6 are the inputs for Phase A,
TB1 positions 7 and 8 are the inputs for Phase B and TB1 positions 9 and 10 are the
Phase C inputs.
62-0391-01 14
CLASS 3400 METER
M33213
LOAD
SOURCE
The Class 3400 meter can be used with two types of current sensors:
1. Split-core current sensor. This sensor opens so that it can be attached around
the circuit being monitored without interrupting power. Unless otherwise specified, all Class 3400 meters are supplied with this sensor type.
2. Solid-core current sensor. This sensor does not open and requires the monitored
conductor to be removed from the circuit to install the current sensor. This type is
only supplied when specified at time of order.
6.4.1 Installing the Split-Core Current Sensor Assembly
1. Each phase being monitored will require one two-piece current sensor assembly.
Open the two-piece current sensor assembly by releasing the nylon clamp using
a flathead screwdriver.
Fig. 5. Split Core Sensor.
2. Reassemble the current sensor assembly around the conductor(s) to be monitored. Ensure the current sensor halves marked “Load” are both facing the load
side of the conductor. The colored arrow will be on the source side of the conductor being monitored and MUST be pointed in a clockwise direction around the
conductor being monitored. Tighten the nylon clamp to complete the assembly.
IMPORTANT:
Fig. 6. Split Core Sensor.
When looking from the source side of the conductor(s) being monitored, you
should see the arrow on the current sensor assembly. The arrow should be
pointing in a clockwise direction around the conductor(s) being monitored. If
the arrow is not positioned on the source side, inaccurate readings will result.
15 62-0391-01
CLASS 3400 METER
6.4.2 Current Sensor Wiring
Once the current sensors are installed onto their appropriate phase conductors, you
can begin terminating the current sensors onto the Class 3400 main board. The
current sensors can be extended up to 500 feet for remote monitoring applications. To
extend the length of the wires, use #22 AWG twisted-pair wire with one white and one
black wire.
The easiest way to connect the current sensors is to use the meter’s built-in current
sensor diagnostics. To do this, there must be at least 1% of the meter’s current rating
(amps) flowing in each of the conductors being monitored. The Class 3400 meter’s
diagnostic program will provide data to ensure that the current sensor installation is
done properly.
The current sensor connection points are located at the bottom right of the main power
board. These are terminals 5 through 10 of terminal block TB1. Each sensor connects
to two terminals one labeled “Black” and the other “White.” Current sensors should be
connected to the meter one at a time and verified using the current sensor diagnostic
program.
Connect one of the current sensors to TB1 terminals 5 and 6 (Phase A). Wait 5
seconds and look at the meter display.
If the meter displays an error message (see below), remove the wires from terminals 5
and 6 and install them on terminals 7 and 8 (Phase B). if an error message occurs with
the sensor attached to terminals 7 and 8, try again on terminals 9 and 10 (Phase C).
The “CT Error: * “message will disappear when the current sensor is connected to the
correct terminals (phase).
Error Messages: CT ERROR: A
CT ERROR: A B
CT ERROR: A C
Refer to the section on Current Sensor Diagnostics for assistance in troubleshooting
these errors.
6.4.3 Main Power
After the meter circuit wiring has been examined for correctness, power may be
applied to the circuit board. There are three LEDs located in the upper right corner of
the Meter Board labeled BEAT, STATUS and LOAD. The BEAT and STATUS LEDs will
blink once per second when the meter is operating normally, twice per second if there
is a problem.If the monitored circuit is under load the LOAD LED will actively blink. A
heavy load will cause the LED to blink faster than a light load. Very light loads will
result in an extended blink time.
62-0391-01 16
CLASS 3400 METER
6.5 Main Power & Current Sensor Wiring Diagram
3-PHASE INSTALLATION DIAGRAM
NOTES:
LINE VOLTAGE CONNECTIONS: #14-22 AWG
SENSOR CONNECTIONS: W = WHITE LEAD B = BLACK LEAD
NEUTRAL NOT USED IN DELTA SYSTEM.
LITTLEFUSE PART NUMBER KLDR 100.
1/10A 600 VAC INLINE FUSE PER CONDUCTOR. LITTLEFUSE PART
1
NUMBER KLDR, 100.
LINE VOLTAGE
∅A∅B∅
LOAD SOURCE
C
1
1
W B W B W B N
1
CURRENT SENSORS
A
∅
B
∅
C
∅
A
∅
B
∅
C
∅
N
M33194
Fig. 7. Current Sensor Wiring Diagram.
6.6 Line Voltage/Current Sensor Diagnostics
Following is a list of diagnostic messages that may appear on the meter display.
DIAGNOSTIC MESSAGES SHOULD NOT BE ON CONTINUOUSLY WHEN THE
METER IS INSTALLED PROPERLY AND IS IN WORKING ORDER.
6.6.1 Line Voltage Diagnostics
The diagnostics program detects line voltage faults by displaying one of two
messages:
PH Missing: B C or Phase sequence error.
Phase sequence error
proper phase sequence. This message should never be seen continuously on the
display during normal operation. The meter will not display correct electrical data in
this condition. The phase sequence problem must be remedied in order for the meter
to work properly.
indicates that the 3-phase line voltage is not hooked up in the
PH Missing: B C
indicates that the line voltage is missing on Phase B and/or Phase C.
This message will appear whenever the power on either Phase B or Phase C is off.
Screen 5 (Voltage per Phase) will also indicate a loss of line voltage.
17 62-0391-01
CLASS 3400 METER
6.6.2 Current Sensor Diagnostics
The load current must be at least 1% of the meter’s rated load in order to use the
diagnostic function. Current sensor diagnostics can detect:
1. Reversed current sensors
2. Incorrect phase correspondence
3. Unusually low power factor (0.642 or lower)
CT Error: (ABC) is used to detect the swapping of current sensor phases. This
message could (in some rare cases) indicate a low (<65%) power factor condition. This
message may appear intermittently due to changes in line conditions. It should not be
on continuously. (See Section 6.4.1.)
NOTE: If you have connected the current sensor to all three terminals and the error
message is still appearing, reverse the black and white wires and repeat the
previous steps until the correct connection is found.
If the
CT Error:
however, the current sensor was not installed properly around the conductor, or the
sensor wires were extended and not spliced together correctly. Correct the sensor
installation, reconnect the black wire to the black terminal and the white wire to the
white terminal on the plug and reinstall the plug into the correct phase terminal for that
current sensor. The error message should disappear and the current sensor is now
installed properly.
If the
CT Error:
ways, check the AC voltage input from the current sensor between the black and white
wires using an AC voltmeter. It will read approximately zero volts indicating that the
load current is very small (or zero) or the current sensors are not secured properly
(tight connection between core halves or lead splices not secure.)
message disappears, you have found the correct sensor connection;
message does not disappear at any time while trying all 3 inputs both
Once the first current sensor is connected properly and the error message disappears,
repeat the previous procedure for the remaining two current sensors. When all error
messages have disappeared and all sensors are installed correctly, the meter is
operational.
62-0391-01 18
CLASS 3400 METER
M32776
RS-485
TERMINAL
M33274
6.7 RS-485 Wiring
RS-485 communication allows a computer or modem to communicate with one or
more Class 3400 meters. You can connect as many as 52 meters along a 4000-foot
RS-485 cable run.
There are three communication protocols available through the Class 3400 RS-485
connection. They are EZ7, Modbus RTU, BACnet MS/TP, and Lonworks FT-10
(Lonworks FT-10 available only through an optional module). The protocol is chosen
when ordering the Class 3400 meter. A second protocol is available through the
Ethernet port. The Ethernet protocol is also chosen when the meter is ordered. See
ordering information for the available choices.
Daisy-Chain Method
This is the simplest method for connecting meters together.
Fig. 8. Daisy-chain Configuration.
1. Connect the +(high) terminal of PORT 1 of each 3400 meter together so that the
+ terminals on all meters are linked, + to + to +...
2. Connect the -(low) terminal of PORT 1 of each 3400 meter together so that the terminals on all meters are linked, - to - to -...
3. Connect the GND terminals of PORT 1 to meter 1 ONLY. The GND terminals
should not be linked to each meter.
Fig. 9. RS-485 Terminal.
19 62-0391-01
CLASS 3400 METER
6.7 RS-485 Wiring (continued)
After performing these steps, all of the meters will be connected in a daisy chain
configuration. This network of meters can then be connected to the RS-485 network
and communication can be established.
Internal Modem
An optional internal modem inside one meter will communicate with the others via the
RS-485 network. Simply connect one of the two telephone jacks on the modem to the
telephone line to complete the installation.
Local Computer
A local computer installed in the building can communicate with the RS-485 network.
The computer must be connected to an RS-232 key. The RS-232 key is then
connected to an available RS-485 jack in the meter using an RJ-11 cable.
NOTE: Don’t confuse the modem’s telephone jacks with the RS-485 jacks!!!
NOTE: When using one meter with an internal modem, only the telephone line is
connected. RS-485 is not needed.
6.8 RS-232 Communications
6.8.1 Hardwired System using the RS-232 Communication Key
The RS-232 communications key allows you to connect Class 3400 meters to a
personal computer that has the E-Mon Energy™ software installed. The computer
communicates with the meters through the RS-232 key.
The RS-232 key must be located within 15 feet of the host computer.
62-0391-01 20
CLASS 3400 METER
CHANNEL 2
~
~
~
~
CHANNEL 3
UP TO 4000
FEET TOTAL
RS-232
KEY*
RS-232 SERIAL
PORT COM1
OR COM2
UP TO 52
CLASS 3400
METERS
M33318
UP TO 4000
FEET TOTAL
UP TO 52
CLASS 3400
METERS
CHANNEL 1
AC ADAPTER
PC
15 FEET MAX
6.8.1 Hardwired System using the RS-232 Communication Key
(continued)
Fig. 10. RS-232 Configuration.
6.8.2 Connecting the RS-232 Key to the Computer
The RS-232 key is supplied with:
a. (1) 8-conductor cable fitted with RJ-45 plugs
b. (1) DB-9 serial COM port adapter
c. (1) AC adapter that converts 120VAC to 9VDC for powering the RS-232 key
Connection Steps:
1. Connect the 8-conductor cable to the left-side jack (labeled “RS232”) on the rear
panel of the RS-232 key.
2. Connect the appropriate COM port adapter (DB-9) to the serial port on the back
of the computer. Plug the 8-conductor cable from the RS-232 key into the COM
port adapter.
3. Connect the provided AC adapter into the rear panel input on the RS- 232 key.
NOTE: When the E-Mon Energy™ software is accessed on the computer, a third
Plug the adapter into a 120VAC outlet. On the front panel of the RS-232 key, two
LEDs (POWER ON and AC ON) will light up.
LED (RS232 READY) will turn on. This indicator will light up as soon as the
E-Mon Energy software is booted up and the correct COM port is set up via
the settings provided in the software’s Locations menu.
21 62-0391-01
CLASS 3400 METER
RJ−11
PLUG
FRONT VIEW
M33196
1 - NC
2 - GND
3 - HIGH
4 - LOW
GND (GREEN)
HIGH (BLACK)
LOW (RED)
2 3 4
6.8.3 Connecting Class 3400 Meters to the RS-232 Key using
RS-485
On the rear panel of the RS-232 key, there are three jacks labeled as channels A, B
and C. These are RS-485 serial communications ports used to connect the meters.
Each of these channels can be connected to as many as 64 individual meters over a
total cable distance of 4,000 feet. The channels are independent and must not be
connected to each other.
*Do not use any pre-made telephone cables.
1. Plug the 4-wire RJ-11 cable/plug assembly into Channel A (or B, or C) on the
RS-232 key. Connect the other end of this cable to the meter via the RS-485
port, at the bottom right of the Class 3400 meter main power board. “DATA Link”
supplied with each RS-232 key should be utilized to connect key to meters.
Additional “DATA Link” terminal blocks can be purchased as necessary.
NOTE: The total combined cable length must not be more than 4000 feet.
2. Each meter has one yellow (TX) and one green (RX) LED located on the right
side of meter board just below the ribbon cable. If the system is properly wired,
these two LEDs will be OFF. These LEDs will flash when the computer and
meter are communicating.
Local Computer
A local computer installed in the building can communicate with the RS-485 network
utilizing E-Mon’s RS-232 conversion key. The RS-232 key is connected to the RS-485
terminals in the closest meter using a cable with an RJ-11 plug terminating the end
that is plugged into the key and is open wiring on the other end for attachment to the
meter’s 3-screw RS-485 terminal block.
62-0391-01 22
Fig. 11. RS-485 Wiring.
6.9 Modem Wiring
CHANNEL 2
~
~
~
~
CHANNEL 3
UP TO 4000
FEET TOTAL
RS-232
KEY RM
RS-232 SERIAL
PORT COM1
THROUGH COM3
MAXIMUM 15 FEET
UP TO 52
CLASS 3400
METERS PER
CHANNEL
M33319
UP TO 4000
FEET TOTAL
UP TO 52
CLASS 3400
METERS PER
CHANNEL
CHANNEL 1
AC ADAPTER
PC OR WINDOWS
COMPATIBLE
LOCAL
MODEM
~
~
TELEPHONE
LINK
CLASS 3400 METER
Fig. 12. Modem Configuration.
6.9.1 Built-In Modem (RS-232 KEY RM)
The RS-232 key with built-in modem connects the entire RS-485 network of Class
3400 meters to a telephone line.
** Refer to Section 6.7 for RS-485 network connections.
On the back panel of the RS-232 key/modem, the left jack (RS232) is not used in most
cases since there is no local host computer.
The two jacks at the top center of the rear panel on the RS-232 key/modem are for
connecting the phone line. Connect either one of these two jacks to the telephone line.
IMPORTANT:
The telephone line should be dedicated exclusively to the automatic meter
reading system. Never connect to a telephone line used by other modems or
fax machines. If there are telephones connected to this phone line, the proprietor must be aware that all phones must be on “hook” in order for the modem
to work. A dedicated phone line is suggested for system reliability.
23 62-0391-01
CLASS 3400 METER
6.9.2 External Modem
1. All meters should be connected to the RS-232 key as described in 6.8.2.
2. DISCONNECT POWER TO THE RS-232 KEY. Remove the cover by removing
the 2 screws from the bottom of the enclosure.
3. On the circuit board, locate the blue jumpers J7 (MODEM) and J8 (ex-MODEM).
If these jumpers are set in the DIRECT position, you must move the jumpers so
they are set in the MODEM position. Replace the cover and secure the enclosure.
4. Connect the RS-232 key to the external modem using the supplied 8-conductor
flat modular cable.
5. Connect the 9VDC adapter to the power input on the back of the RS-232 key
and plug it into a 120VAC outlet.
IMPORTANT:
The modem should use a phone line that is dedicated exclusively to the AMR
system. Do not use a phone line that is shared by another modem or fax
machine.
6.9.3 Baud Rate Selection
The communication baud rate is selected by means of DIP switch S2 positions 3 and 4
on the circuit board. There are four (4) selections: 9600 (factory default), 19200,
38400, and 76800.
1. Select 9600 when using the Class 3400 meter with a modem.
2. The baud rate on the meter must always match the baud rate selected in the EMon Energy software; otherwise, communications will not work.
3. After a baud rate change, press CPU Reset to register the change.
4. All meters in the daisy-chain circuit must be set at the same baud rate.
5. The DIP switch is located above the RS-485 terminals.
NOTE: USE ONLY POSITIONS 3 AND 4 - DO NOT CHANGE ANY OTHER
62-0391-01 24
POINTS.
CLASS 3400 METER
M33277
3 4 BAUD RATE
ON ON 9600
OFF ON 19200
ON OFF 38400
OFF OFF
The selections are noted below.
Fig. 13. Baud Rate.
6. Using other than 9600 BAUD will reduce the maximum cable length allowed for
communication.
25 62-0391-01
CLASS 3400 METER
RS-485
TERMINAL
6.10 Modbus RTU Wiring
The Class 3400 Modbus meter communicates with building automation equipment
over a 2-wire (3-conductor) RS-485 network using Modbus RTU protocol. The meters
are networked in a daisy-chain configuration (Section 6.7) with BELDEN 1120A cable
or equivalent. The cable rating of 600V allows the RS-485 network to be connected to
480-volt meters. Up to 52 meters can be installed on a network string. The maximum
combined length of all daisy-chained cables must not exceed 4000 feet.
The meter-to-network connection is through the 3-screw terminal which is located on
the Main Power Board of the meter.
Fig. 14. Modbus RTU Wiring.
The meter is shipped with a Modbus ID number of 01. This must be changed if the
network has more than one meter installed. The change must be done before the
meter is introduced into the network. The meter can be numbered from 1 to 247. There
can be no duplicate numbers on a network, so caution must be taken when assigning
a meter ID number prior to its installation on the RS-485 network.
SEE SECTIONS 10 AND 11 FOR INSTRUCTIONS ON CHANGING I.D. AND IP
ADDRESSES.
62-0391-01 26
CLASS 3400 METER
6.11 BACnet MS/TP Wiring
BACnet MS/TP wiring is the same as Modbus and EZ7 wiring. See Sections 10 and 11
for instructions on changing I.D. and IP addresses.
6.12 Connecting Class 3400 Meters to the USB Key
using RS485
The USB Key plugs into the PC’s USB port and provides a termination point for the
RS485 wiring from the meters. Up to 52 meters can be “Daisy chained” with up to 4000
feet total RS485 wiring. The USB Key is labeled for “plus (+)”, “minus (-)“, and ground
and the wiring must match the same positions on the meters. If more than 52 meters
are to be monitored, additional USB Keys can be utilized to connect them to the PC.
Fig. 15. Connecting Class 3400 Meters to the USB Key using RS485
27 62-0391-01
CLASS 3400 METER
6.13 Ethernet Communications
Ethernet/IP communications connections are provided through an RJ-45
connector(J8) in the lower right corner of the main power board. This port can be
connected directly to a network port of a PC using a Cat. 5e crossover cable.
Two LEDs are provided directly above the connector. The LINK LED is yellow and
when lit, indicates ethernet connectivity. The ACT led is green and when lit, indicates
communication activity.
The communication protocol for the Ethernet port is selected when ordering the meter.
The available choices are EZ7, Modbus TCP/IP and BACnet IP. See the ordering
information for the available choices in combination with the RS-485 output.
Class 3400 Ethernet/IP Addressable meters can be tied into a local Ethernet network
individually. Multiple RS-485 meters to Ethernet requires optional “EKME” device.
Each device that is connected directly to the ethernet network requires a unique IP
address.
62-0391-01 28
CLASS 3400 METER
M32786
EMS OR
CONTROL UNIT
WITH MODBUS
COMMUNICATION
M32787
ETHERNET
NETWORK
RS-485 DAISY CHAIN (SECTION 5.7)
SEE SECTION 10 FOR INSTRUCTIONS ON CHANGING ID AND IP ADDRESSES.
Fig. 16. EMS or Control Unit with Modbus Communication RS-485 Daisy Chain
Ethernet Network.
29 62-0391-01
CLASS 3400 METER
7.0 MULTIPLE-LOAD MONITORING
The E-Mon D-Mon Class 3400 meter provides extreme flexibility by allowing additional
sets of current sensors to be used in parallel so multiple load locations can be
monitored by one meter. This feature allows a totalized display readout from two or
more load circuits.
You may use parallel sensors to monitor specific breakers from one panel, specific
breakers from more than one panel, two or more complete panels, etc.
When paralleling current sensors, the following rules must be followed for accurate
readings:
1. Current sensors must be installed in complete sets of three, with a maximum of
three sensors installed in parallel per phase.
2. All sensors used in parallel must be of the same amperage rating (all 100-amp,
all 400-amp, etc.) The rating is determined by the current rating of the meter. For
example, a 200-amp meter must use extra sets of 200-amp current sensors.
3. All locations being monitored must have the same power source. A 480-volt
meter cannot monitor a 208-volt load, nor can a meter monitor two-480 volt loads
if they are from different originating power sources or from different transformers.
4. Multiply the meter display readings by the number of sets of current sensors
installed. Example: Meter readings of 5 kWh with 2 sets of current sensors - 10
kWh is the actual usage. (5 x 2=10.)
62-0391-01 30
CLASS 3400 METER
NOTE: One set of current sensors equates to three sensors, one per phase. The
multiplier only applies when extra sets of current sensors are installed on one
meter. If you are using only one set of three current sensors, the multiplier is
not required.
LOAD SOURCE
LOAD A
LOAD SOURCE
LOAD B
Fig. 17. Multiple-load Wiring Diagram.
Ø
Ø
ØC
N
Ø
Ø
ØC
N
A
B
A
B
LINE VOLTAGE
AØBØC
Ø
CURRENT SENSORS
A
Ø
W B W B W BN
ØBØ
C
M31603
31 62-0391-01
CLASS 3400 METER
WARNING
8.0 PREVENTATIVE/SCHEDULED
MAINTENANCE
The unit is shipped in a calibrated and fully functional tested condition. Since the unit is
factory-calibrated using proprietary firmware algorithms, no internal unit adjustments
are necessary.
This unit contains no internal adjustments, so no preventative or scheduled
maintenance is required.
No cleaning or decontamination procedures are required for this instrument.
9.0 LITHIUM BATTERY REPLACEMENT
The Class 3400 kWh/Demand meter has a Lithium Battery Cell, which is used to retain
the contents of SRAM and the RTC during power outages. The battery has a life
expectancy of greater than 5 years.
Nominal Working Voltage 3 Vdc Output
Nominal Current Capacity 225 mAHr
Cell Chemical Manganese Dioxide Lithium
Operating Temperature Range -30 to +60 Degrees Celsius
Manufacturer Panasonic
Manufacturer’s Part Number CR2032
Fig. 18. Battery Specifications at 25 Degrees Celsius.
Only replace battery with Panasonic part number CR2032 only. Use of another
battery may present a risk or explosion. See owners manual for safety
instructions. Internal circuit card components are extremely sensitive to
electrostatic discharge. Be careful not to touch internal circuitry prior to
discharging any static buildup on your person. To discharge yourself, touch a
grounded metal object such as conduit or a metal enclosure exterior.
The battery cell is mounted in a coin cell on the upper right side of the main
power board. Replace the battery if the low battery warning is on display.
62-0391-01 32
Fig. 19. Lithium Battery Cell.
M33278
BATTERY
+
–
Use the following procedure to replace the battery cell
CLASS 3400 METER
1. Disconnect power from the meter at the unit external circuit breaker.
2. Remove the battery from its holder and place on a non-conductive surface.
3. Install new battery into the battery holder.
NOTE: Care should be taken to insure that the replacement battery is installed the
same polarity as the battery that was removed. No damage to unit or battery
will occur if battery is inadvertently installed in the wrong direction.
4. Dispose of the used battery in accordance with the manufacturers’ (Panasonic)
instructions.
33 62-0391-01
CLASS 3400 METER
M33320
DOWN
UP
SELECT
MENU
10.0 CLASS 3400 METER FEATURES
DISPLAY BOARD PUSH BUTTONS
Fig. 20. Push Buttons.
Four push button switches (DOWN, UP, SELECT, MENU) can be used to configure the
following:
Load Control (with expansion board only)
Date & Time
Device ID
IP Settings
BACnet Settings
Reset KW/KWH Read
62-0391-01 34
CLASS 3400 METER
10.0 CLASS 3400 METER FEATURES (CONT)
To access any of these items press the MENU button. The list will be displayed and an
arrow will appear to the left of LOAD CONTROL. To scroll down the list press the
MENU button until the desired item is indicated by the arrow. Then push the SELECT
button to enter the configuration screen for that item. The UP and DOWN buttons can
then be used to change the configuration field that is flashing. To change to a different
field push the SELECT button again. After all changes have been made the display will
return to scrolling after approximately 20 seconds.
Load Control
Load control parameters can be entered using the Load Control menu.
Date & Time
Select this field to set month, day, year and time
Device ID
Select Device ID to change the default setting. The default setting is 1A for EZ7 and 1
for ModBus.
IP Settings
The IP Settings menu allows you to select DHCP or static IP address. The static IP
address, mask and gateway information can be entered using this menu.
BACnet Settings
The BACnet settings menu allows you to select and change the BACnet setting. To
reset, press the MENU button. Press the Up/Down Buttons until the BACnet Settings
line is selected.Press the SELECT button to enter the BACnet setting screen. Then,
use the up/down keys to change the setting. Then press the Select button to enter the
new setting.
Peak Demand Reset
To reset the recorded peak kW demand, press the MENU button until “Reset kW/kWh
Read” is indicated by the arrow on the display.
Press the SELECT button.
Reset kW only? N
Reset all? N
Will appear on the display. Press the UP button to change the N to a Y after “Reset kW
only?”.
The peak demand will be reset to zero and the meter will return to its normal scrolling
display mode.
Reset all will reset kWh as well as kW.
35 62-0391-01
CLASS 3400 METER
10.0 CLASS 3400 METER FEATURES
(CONTINUED)
Display Hold Feature
You can “lock” the scrolling display so that it will stay locked on any one of the 7
screens. On the inside of the door, locate the 4 buttons at the top of the Display Board:
Down, Up, Select and Menu.
To stop the display from scrolling, follow these instructions:
The Select button is used to lock the meter’s display so that it stops scrolling and the
display remains on one screen.
Use the Up and Down buttons to choose which of the 7 screens you would like to
display.
Press the Select button. At the top of the display, you will see the message
HOLD1. This will lock the display for 1 HOUR.
Note: The display hold feature has different selectable time periods.
Pressing Select again will show the message HOLD6. This will lock the display for 6
HOURS.
Continuing to press the Select button will provide additional timing choices:
HOLD12: Locks the display for 12 HOURS
HOLD24: Locks the display for 24 HOURS
HOLD: Locks the display indefinitely
To exit the HOLD mode:
Press the Select button as many times as needed until the HOLD message disappears
from the display, or simply press the CPU RESET button located near the right center
of the CPU board.
** Be sure to exit from the HOLD mode when you are done using this feature.
62-0391-01 36
CLASS 3400 METER
Screen 1: Total Kilowatt-Hours (kWh)
Delivered
Screen 2: Peak Demand (kW)
with Date & Time Stamp
Screen 3: Actual Load (kW)
with Present Time
Screen 4: Average Current (amps)
Per Phase
Screen 5: Average Voltage (volts)
Per Phase
Screen 6: Average Voltage (volts)
Phase to Phase
Screen 7: Power Factor (pf)
Per Phase
11.0 READING THE CLASS 3400 METER
DISPLAY
The Class 3400 meter features seven different displays showing information in 5
second scrolling intervals. Explanations of these displays are as follows:
Fig. 21. Class 3400 Meter Display Screens.
37 62-0391-01
CLASS 3400 METER
12.0 CLASS 3400 METER EXPANSION
BOARD
The Class 3400 Meter Expansion Board option adds a number of new features to the
meter.
Pulse Input
The board contains two pulse inputs for connection to external metering devices which
have a dry-contact type of output pulse. The maximum frequency of pulses accepted
by the Class 3400 meter is 10Hz.
Pulse Output
The board contains two pulse outputs for use by Building Automation Systems, etc.
One pulse is in watt-hours, the second pulse is in VAR-hours. They are not polarity
dependant. The maximum current allowed is 400ma and the maximum voltage allowed
is 40 VAC or VDC.
Alarm Relay / Load Control
There are two form “C” relays on the expansion board. They are designed to be used
for alarming or load control functions on circuits up to 250VAC and 3 amps.
62-0391-01 38
12.1 Expansion Board Connections
M33321
+
–
INP1
+
–
+
–
+
–
INP2 OUT1
OUT2
NC
COM2
NO
NC
COM1
NO
IO - Terminals
Relay - Terminals
CLASS 3400 METER
* The input terminals are used with “dry” contacts from third party metering devices.
They can be used with mechanical or electronic contacts. If using electronic contacts,
be sure to maintain polarity as shown. Maximum pulse frequency is 10Hz. The output
terminals are rated for a maximum of 40 volts AC or DC. The maximum load is 400 ma.
** The relay terminals are rated for a maximum of 250 VAC and a load of 3 amps.
Relay #1 is set through the push buttons on the display board. Relay #2 is only
accessed through special software commands. See Section 12.3 for details on setting
relay #1.
39 62-0391-01
CLASS 3400 METER
12.2 Pulse Type and Value
The pulse outputs provided by the Class 3400 meter are watt-hours and var-hours.
Output 1 is the watt-hour pulse and Output 2 is the var-hour pulse. The pulse value is
dependant on the amperage size of the meter. See the chart below for the values.
Meter Amps Welt-hours / pulse Var-hours / pulse
100 1.95313 1.95313
200 3.90625 3.90625
400 7.8125 7.8125
800 15.625 15.625
1800 31.25 31.25
3200 62.5 62.5
62-0391-01 40
CLASS 3400 METER
12.3 Load Control
The Class 3400 Load Control relay is used to activate alarming or load control. The
relay contacts are rated for 250 VAC and a maximum of 3 amps load. It can be used for
direct control of alarms under 3 amps or as a pilot duty device for high loads.
The relay set points are accessed through push buttons on the meter’s display board.
The meter’s display screen indicates the load settings.
a. LOAD: Present load on the
meter
b. LIMIT: Load Control set
point
c. VAR: Deactivation variation
d. R/H: Ramp and Hold set-
tings
Fig. 22. Load Control.
a. The present load (LOAD) on the meter indicates the actual KW load in real-
time.
b. The load control set point (LIMIT) is set to the desired point for the relay to
activate. Depending on the alarm/control requirements, this can be used for
either high or low load activation.
c. The relay deactivation setting (VAR) is the point where the relay is deacti-
vated. The “+” sign indicates that the deactivation point will occur when the
load rises above the set point. This is used when the relay is to be activated
on a low load condition. The “-” sign indicates that the deactivation point will
occur when the load drops below the set point. This is used when the relay is
to be activated on a high load condition. The kw setting indicates the differ-
ence from the set point where the relay will deactivate.
In the example above, the relay is set to activate on a low load condition. The relay will
deactivate when the load rises (+) above the set point by 3.5 kw. (deactivates at 9 kw).
d. The Ramp (R) setting indicates the time delay for activation when the set-
point is reached. This is to prevent relay function on short term load
changes, such as a motor start. The example shows a 5 second delay before
The Hold (H) setting indicates the time delay for relay deactivation when the load
variation is reduced from the variation that was set. The example shows that there is a
20 second delay before the relay deactivates. This is designed to prevent short cycling
of loads when the relay functions.
Section 10.0 describes the pushbuttons and their functions.
the relay activates.
41 62-0391-01
CLASS 3400 METER
13.0 FREQUENTLY ASKED QUESTIONS
Q. When providing line voltage to the meter, can I tap off of the same breaker I am
monitoring?
A. Yes, the voltage can be pulled from the same breaker being monitored.
Q. Can the meter’s line voltage wires be run in the same conduit as the sensor leads?
A. Yes. There will be no effect if the sensor leads and line voltage wires are run in the
same conduit.
Q. Can the meter’s communication wires and line voltage be run in the same conduit?
A. It is not recommended to run these wires together due to noise concerns and their
effects on the communications signal integrity. Communications wires can be routed
separately using the 3/4” conduit port.
Q. How do I find the cost for kWh and kW to bill my tenants?
A. Your local utility bill should list the cost per kWh and kW. If not, simply call your utility
and ask them to provide you with the cost per kWh and kW.
Q. What size wire do I use for the line voltage leads?
A. These wires are normally sized at #14 AWG, but be sure to confirm this requirement
with your local and national electrical code requirements.
Q. What size wire should I use to extend the current sensor leads?
A. These wires are normally 14-22 AWG, twisted-pair arrangement. Consult your
electrical code for proper wiring requirements.
62-0391-01 42
CLASS 3400 METER
13.0 FREQUENTLY ASKED QUESTIONS
(CONTINUED)
Q. The load I need to monitor has parallel feeds. How do I install the current sensors
for this application?
A. There are two ways you can monitor parallel feeds. The easiest and preferred
method is to clamp the sensors around all feed wires for each phase. The second way
to monitor parallel feeds is to clamp the sensor around one of the feed wires for each
phase. When you read the meter, the final reading must be multiplied by the number of
feed wires for each phase.
Q. I have two subpanels I would like to monitor with one Class 3400 meter. These
subpanels are fed by different transformers in the building. Can I parallel sensors and
monitor both panels with one meter?
A. No. These panels cannot be monitored with one meter because they are different
power sources. When you parallel current sensors, all loads being monitored must be
from the same voltage source.
Q. I have 5 breakers in one subpanel I would like to monitor with one class 3400 meter.
Can this be done without having to parallel current sensors?
A. Yes. Simply run all the breaker wires through one set of current sensors. Make sure
all A-phase circuits are run through the A-phase sensor, and the same for B & C
phases. The meter should be sized by the highest amount of current being monitored
by one sensor.
Q. I’ve gone through the troubleshooting guides and I still can’t get my class 3400
meter to work. What should I do?
A. Before removing the unit, contact E-Mon’s technical services department at (800)
334-3666. E-Mon’s technical department will assist you in detailed troubleshooting of
the meter installation and assist you in getting the unit running without having to
remove and/or return it.
43 62-0391-01
CLASS 3400 METER
14.0 PROTOCOL DESCRIPTIONS
Modbus Integer Registers:
Address Reg Description Units CL 3400
40001* 2 Energy delivered kWh Pulse R/W
40003 2 Energy received kWh Pulse R/W
40005 2 Reactive energy delivered kVARh Pulse R/W
40007 2 Reactive energy received kVARh Pulse R/W
* To clear single meter kWh/kVARh, set multiple points at 40001 for 8 points with data
set to 0000 0000 0000 0000 0000 0000 0000 0000. Jumper J6 must be closed.
Modbus Float Registers:
Address Reg Description Units CL 3400
41001** 2 Energy delivered kWh R/W
41003** 2 Energy received kWh R/W
41005** 2 Reactive energy delivered kVARh R/W
41007** 2 Reactive energy received kVARh R/W
41009 2 Real power kW R
41011 2 Reactive power kVARh R
41013 2 Apparent power kVARh R
41015 2 Power factor % PF R
41017 2 Current total Amps R
41019 2 Current average Amps R
41021 2 Voltage line-neutral Volts-N R
41023 2 Voltage line-line Volts-L R
41025 2 Frequency Hz R
41027 2 Phase angle Degree R
41029 2 Real power, phase A kW R
41031 2 Real power, phase B kW R
41033 2 Real power, phase C kW R
41035 2 Reactive power, phase A kVAR R
41037 2 Reactive power, phase B kVAR R
41039 2 Reactive power, phase C kVAR R
41041 2 Apparent power, phase A kVA R
41043 2 Apparent power, phase B kVA R
41045 2 Apparent power, phase C kVA R
62-0391-01 44
CLASS 3400 METER
Modbus Float Registers:
Address Reg Description Units CL 3400
41047 2 Power factor, phase A % PF R
41049 2 Power factor, phase B % PF R
41051 2 Power factor, phase C % PF R
41053 2 Current, phase A Amps R
41055 2 Current, phase B Amps R
41057 2 Current, phase C Amps R
41059 2 Voltage, line to neutral, phase A-N Volts-N R
41061 2 Voltage, line to neutral, phase B-N Volts-N R
41063 2 Voltage, line to neutral, phase C-N Volts-N R
41065 2 Voltage, line to line, phase A-B Volts-L R
41067 2 Voltage, line to line, phase B-C Volts-L R
41069 2 Voltage, line to line, phase C-A Volts-L R
41071 2 Phase angle, phase A Degree R
41073 2 Phase angle, phase B Degree R
41075 2 Phase angle, phase C Degree R
41077 2 Reserved
41079 2 Reserved
41081 2 Reserved
41083*** 2 External Input 1 Pulse R/W
41085*** 2 External Input 2 Pulse R/W
** To clear single meter kWh/kVARh, set multiple points at 41001 for 8 points with data set to 0000 0000
0000 0000 0000 0000 0000 0000. Jumper J6 m
External inputs are standard on Class 5000 meters and optional on Class 3400 meters (Part of
***
Expanded Feature Package).To clear Auxiliary Inputs, set multiple points at 41083 or 41085 for 2 points
with data set to 0000 0000. Jumper J6 must be closed.
BACnet Object Descriptors:
ID
BACnet
Object Description Units
BACnet
Property
1 Analog Input Energy delivered kWh Present Value R
2 Analog Input Energy received kWh Present Value R
3 Analog Input Reactive energy delivered kVARh Present Value R
4 Analog Input Reactive energy received kVARh Present Value R
5 Analog Input Real power kW Present Value R
6 Analog Input Reactive power kVARh Present Value R
7 Analog Input Apparent power kVARh Present Value R
45 62-0391-01
CL
3400
CLASS 3400 METER
BACnet Object Descriptors:
ID
BACnet
Object Description Units
BACnet
Property
8 Analog Input Power factor % PF Present Value R
9 Analog Input Current total Amps Present Value R
10 Analog Input Current average Amps Present Value R
11 Analog Input Voltage line-neutral Volts-N Present Value R
12 Analog Input Voltage line-line Volts-L Present Value R
13 Analog Input Frequency Hz Present Value R
14 Analog Input Phase angle Degree Present Value R
15 Analog Input Real power phase A kW Present Value R
16 Analog Input Real power phase B kW Present Value R
17 Analog Input Real power phase C kW Present Value R
18 Analog Input Reactive power phase A kVAR Present Value R
19 Analog Input Reactive power phase B kVAR Present Value R
20 Analog Input Reactive power phase C kVAR Present Value R
21 Analog Input Apparent power phase A kVA Present Value R
22 Analog Input Apparent power phase B kVA Present Value R
23 Analog Input Apparent power phase C kVA Present Value R
24 Analog Input Power factor phase A % PF Present Value R
25 Analog Input Power factor phase B % PF Present Value R
26 Analog Input Power factor phase C % PF Present Value R
27 Analog Input Current phase A Amps Present Value R
28 Analog Input Current phase B Amps Present Value R
29 Analog Input Current phase C Amps Present Value R
30 Analog Input Voltage line-neutral phase A-N Volts-N Present Value R
31 Analog Input Voltage line-neutral phase B-N Volts-N Present Value R
32 Analog Input Voltage line-neutral phase C-N Volts-N Present Value R
33 Analog Input Voltage line-line phase A-B Volts-L Present Value R
34 Analog Input Voltage line-line phase B-C Volts-L Present Value R
35 Analog Input Voltage line-line phase C-A Volts-L Present Value R
36 Analog Input Phase angle phase A Degree Present Value R
37 Analog Input Phase angle phase B Degree Present Value R
38 Analog Input Phase angle phase C Degree Present Value R
39 Analog Input Reserve A
40 Analog Input Reserve B
CL
3400
62-0391-01 46
CLASS 3400 METER
BACnet Object Descriptors:
ID
BACnet
Object Description Units
BACnet
Property
CL
3400
41 Analog Input Reserve C
42* Analog Input External Input 1 Pulse Present Value R
43* Analog Input External Input 2 Pulse Present Value R
*External inputs are standard on Class 5000 meters and optional on Class 3400 meters (Part of Expanded
Feature Package).
Lonworks SNVT Types Point Map:
Network Variable
Name SNVT Type Description Units CL3400
nvoKWh_Del SNVT_count_inc_f Energy delivered kWh R
nvoKWh_Rec SNVT_count_inc_f Energy received kWh R
nvoKVarh_Del SNVT_count_inc_f Reactive energy
kVARh R
delivered
nvoKVarh_Rec SNVT_count_inc_f Reactive energy
kVARh R
received
nvoReal_Pwr SNVT_count_inc_f Real power kW R
nvoReact_Pwr SNVT_count_inc_f Reactive power kVARh R
nvoAppar_Pwr SNVT_count_inc_f Apparent power kVARh R
nvoPwr_Fact SNVT_pwr_fact_f Power factor % PF R
nvoCurrent_Total SNVT_amp_f Current total Amps R
nvoCurrent_Avg SNVT_amp_f Current average Amps R
nvoVolt_LN SNVT_volt_f Voltage line-neutral Volts-N R
nvoVolt_LL SNVT_volt_f Voltage line-line Volts-L R
nvoFrequency SNVT_freq_f Frequency Hz R
nvoPhase_Angle SNVT_angle_f Phase angle Degree R
nvoReal_Pwr_PhA SNVT_count_inc_f Real power, phase A kW R
nvoReal_Pwr_PhB SNVT_count_inc_f Real power, phase B kW R
nvoReal_Pwr_PhC SNVT_count_inc_f Real power, phase C kW R
nvoReact_Pwr_PhA SNVT_count_inc_f Reactive power,
kVAR R
phase A
nvoReact_Pwr_PhB SNVT_count_inc_f Reactive power,
kVAR R
phase B
nvoReact_Pwr_PhC SNVT_count_inc_f Reactive power,
kVAR R
phase C
47 62-0391-01
CLASS 3400 METER
Lonworks SNVT Types Point Map:
Network Variable
Name SNVT Type Description Units CL3400
nvoAppar_Pwr_PhA SNVT_count_inc_f Apparent power,
kVA R
phase A
nvoAppar_Pwr_PhB SNVT_count_inc_f Apparent power,
kVA R
phase B
nvoAppar_Pwr_PhC SNVT_count_inc_f Apparent power,
kVA R
phase C
nvoPwr_Fact_PhA SNVT_pwr_fact_f Power factor, phase A % PF R
nvoPwr_Fact_PhB SNVT_pwr_fact_f Power factor, phase B % PF R
nvoPwr_Fact_PhC SNVT_pwr_fact_f Power factor, phase C % PF R
nvoCurrent_PhA SNVT_amp_f Current, phase A Amps R
nvoCurrent_PhB SNVT_amp_f Current, phase B Amps R
nvoCurrent_PhC SNVT_amp_f Current, phase C Amps R
nvoVolt_LN_PhA_N SNVT_volt_f Voltage, line to
neutral, phase A-N
nvoVolt_LN_PhB_N SNVT_volt_f Voltage, line to
neutral, phase B-N
nvoVolt_LN_PhC_N SNVT_volt_f Voltage, line to
neutral, phase C-N
nvoVolt_LL_PhA_B SNVT_volt_f Voltage, line to line,
phase A-B
Volts-N R
Volts-N R
Volts-N R
Volts-L R
62-0391-01 48
CLASS 3400 METER
15.0 METER LIMITED WARRANTY
Subject to the exclusions listed below, E-Mon will either repair or replace (at its option)
any product that it manufactures and which contains a defect in material or
workmanship.
The following exclusions apply:
1. This Limited Warranty is only effective for a period of (5) five years following the
date of manufacture when installed in accordance with manufacturer’s instructions by qualified personnel.
2. E-Mon must be notified of the defect within ninety (90) days after the defect
becomes apparent or known.
3. Buyer’s remedies shall be limited to repair or replacement of the product or component which failed to conform to E-mon’s express warranty set forth above.
4. Buyer shall be responsible for all freight costs and shall bear all risk of loss or
damage to returned goods while in transit.
5. This Limited Warranty does not cover installation, removal, reinstallation, or labor
costs, and excludes normal wear and tear. Buyer shall provide labor for the
removal of the defective component or item and installation of its replacement at
no charge to E-Mon.
6. This Limited Warranty does not cover any product if: (i) a product is altered or
modified from its original manufactured condition, (ii) any repairs, alterations or
other work has been performed by Buyer or others on such item, other than work
performed with E-Mon’s authorization and according to its approved procedures;
(iii) the alleged defect is a result of abuse, misuse, improper maintenance,
improper installation, accident or the negligence of any party; (iv) damaged as a
result of events beyond E-Mon’s control or other force majeure events or (v) used
in conjunction with equipment, components, accessories, parts or materials not
supplied or approved by E-Mon.
7. This Limited Warranty is limited to the obligation to repair or replace the manufactured product. This is the sole and exclusive remedy for any breach of warranty. IN NO EVENT SHALL E-MON BE LIABLE FOR ANY INDIRECT,
INCIDENTAL, SPECIAL, CONSEQUENTIAL OR PUNITIVE DAMAGES
(INCLUDING ANY DAMAGE FOR LOST PROFITS) ARISING OUT OF OR IN
CONNECTION WITH THE FURNISHING OF PRODUCTS, PARTS OR SERVICES, OR THE PERFORMANCE, USE OF, OR INABILITY TO USE ANY
PRODUCTS, PARTS OR SERVICES, SALE OF OR OTHERWISE, WHETHER
BASED IN CONTRACT, WARRANTY, TORT, INCLUDING WITHOUT LIMITATION, NEGLIGENCE, OR ANY OTHER LEGAL OR EQUITABLE THEORY.
8. EXCEPT AS EXPRESSLY PROVIDED HEREIN, E-MON MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED WITH RESPECT TO ANY
PRODUCTS, PARTS OR SERVICES PROVIDED BY E-MON INCLUDING, BUT
NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
FITNESS FOR A PARTICULAR PURPOSE. PRODUCTS OR COMPONENTS
DISTRIBUTED, BUT NOT MANUFACTURED, BY E-MON ARE NOT WARRANTED BY E-MON AND BUYER MUST INSTEAD RELY ON THE REPRESENTATIONS AND WARRANTIES, IF ANY, PROVIDED DIRECTLY TO THE
BUYER BY THE MANUFACTURER OF SUCH PRODUCT OR COMPONENT.
49 62-0391-01
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62-0391-01 50
CLASS 3400 METER
51 62-0391-01
CLASS 3400 METER
E-Mon
850 Town Center Drive
Langhorne, PA 19047
www.emon.com
info@emon.com
® U.S. Registered Trademark
© 2012 E-Mon
62-0391-01 JPG Rev. 01-12
Printed in United States
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