62-0397-02
Class 320 Meter
ADVANCED KWH/DEMAND METER
INSTALLATION INSTRUCTIONS
CLASS 320 METER
TABLE OF CONTENTS
Section 1.0 Introduction 3
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 and Safety Information 11
Section 6.0 Meter Installation 12
Section 6.1 Mounting the Class 320 Meter 12
Section 6.2 Main Power Board Connections 12
Section 6.3 Phasing of Line Voltage 16
Section 6.4 Current Sensor Installation & Wiring 17
Section 6.5 Main Power & Current Sensor Wiring Diagram 19
Section 6.6 Line Voltage/Current Sensor Diagnostics 20
Section 6.7 RS-485 Wiring 21
Section 6.8 RS-232 Communications 24
Section 6.9 Modem Wiring 26
Section 6.10 Modbus RTU Wiring 29
Section 6.11 BACnet MS/TP Wiring 30
Section 6.12 Connecting Class 320 Meters to USB Key using RS485 30
Section 6.13 Ethernet Communications 31
Section 7.0 Multiple-Load Monitoring 32
Section 8.0 Preventative/Scheduled Maintenance 33
Section 9.0 Lithium Battery Replacement 34
Section 10.0 Class 320 Meter Operating Modes 36
Section 10.1 Start Up Screens 36
Section 10.2 Normal Mode Display Screens 37
Section 10.3 How to Program the Display Screens 38
Section 11.0 High Voltage Metering 43
Section 12.0 Class 320 Protocol Definitions 46
Section 13.0 Meter Limited Warranty 53
62-0397-02 2
CLASS 320 METER
1.0 INTRODUCTION
The Honeywell Class 320 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. 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. For example, Class 320 meters labeled
for 120/208V service MUST NOT be installed on service feeds of 277/480 volts or 347/
600 and vice versa.
Meter Labeled: Works On:
120V 120V, Single Phase
120/240V 120/240V, Single Phase
277V 277V, Single Phase
208V 208V, Three Phase
240V 240V, Three Phase
400V (380V,415V) 400V, Three Phase
480V 480V, Three Phase
600V 600V, Three Phase
Verify that the Class 320 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
3 62-0397-02
CLASS 320 METER
CAUTION
WARNING
Internal circuit 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 enclosure.
Use of this instrument, the Honeywell Class 320 meter, 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 the installation or functional verification opera-
tions, do not immediately remove the unit. Before removing the unit, contact
Honeywell’s technical support and/or engineering department. Honeywell’ s
technical department will assist you in detailed troubleshooting of the Class
320 meter installation and assist you in getting the unit operating correctly.
62-0397-02 4
CLASS 320 METER
M33308
RS-485
MAIN
POWER
INPUT
CURRENT
SENSOR
INPUT
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 UL Type 1 (steel) or Type
4X (rain tight) enclosure.
MAIN
POWER
BOARD
DISPLAY
BOARD
M33307
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 TB2, TB3 and TB4. Each
terminal block corresponds to an input voltage phase; care must be exercised to
ensure that each current sensor is connected to the correct terminal block. One three
terminal screw connector is provided for RS-485 communications.
Fig. 2. Main Power Board Connections.
5 62-0397-02
CLASS 320 METER
M33279
DOWN
UP
SELECT
MENU
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.
The Class 320 meter features a 4-line LCD display that indicates multiple meter data
points.
Fig. 3. Display Board.
62-0397-02 6
CLASS 320 METER
3.0 METER TECHNICAL SPECIFICATIONS
Brand
Example H 32- 208 100- J RTU KIT
H32-208100-JRTUKIT
Brand Honeywell
Class 320
Voltage 120, 208, 400 (380-415), 480, 600
Amperage 2HV, 100, 200, 400, 800, 1600, 3200
Enclosure J (JIC Steel), I (Interior only), M (MMU Style), R (Rain tight)
Communication
Protocol
Current Sensors/
Options
Ordering Information: Define brand, class, input voltage, amperage, protocol, and
sensor type in the format A-BB-CCC-DDDD-E-FFF-GGG, where:
A = Brand: H for Honeywell
BB = designates Class 320 (32), or Class 500 (50) meter
CCC = input voltage: (208, 400, 480, 600, 120 volt for High Voltage)
DDDD = current rating: (100, 200, 400, 800, 1600, 3200, 25HV)
E = enclosure: J = metal (type 1), R = non-metallic (rain tight) (type 4X), M = MMU
FFF= protocol: RTU = Modbus, BAC = BACnet, EZ7 = proprietary
“-SP”= Single or Two Phase
GGG = Sensors: KIT = split-core, SCS = solid-core, “blank” = none supplied
RTU (Modbus RTU), BAC (BACnet MS/TP), EZ7
KIT (Split Core), SCS (Solid-Core), -SP (Single or Two Phase - 2
element)
Class
Voltage
Amperage
Enclosure
Communication
Protocol
Current
Sensor/Option
Current
Sensor/Option
Current
Sensor/Option
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
3-wire (delta) Or 4-wire (wye)
Up To 3200 amps RMS AC available
7 62-0397-02
CLASS 320 METER
Temperature Range -20C to +50C
Relative Humidity
0-95% non-condensing
Range
Altitude 2000 meters maximum
Voltage Overload +25% continuously: +100% For 20 cycles
Current Sensor
100% for 1 minute
Overload
Pollution Degree Degree 2 in accordance with IEC 664
Standards
Installation
EN 61326-1:2006 IEC 61010-1:2001, 2nd Edition
Category III
(Overvoltage)
Category
Measurement
Category III
Category
Enclosure Material Type 1 JIC steel or Type 4X Rain Tight
Display Readout LCD
Standard Ranges
RS-485 Serial
Communications
Cable
2-Wire Delta 120 VAC: 100, 200, 400, 800,1600, 3200 Amp
4-Wire Wye 120/208 VAC: 100, 200, 400, 800,1600, 3200 Amp
3-Wire Delta 120/240 VAC: 100, 200, 400, 800,1600, 3200 Amp
4-Wire Wye 277/480 VAC: 100, 200, 400, 800,1600, 3200 Amp
2-Wire Wye 277 VAC: 100, 200, 400, 800,1600, 3200 Amp
4-Wire Wye 400 VAC: 100, 200, 400, 800,1600, 3200 Amp
3-Wire Delta 480 VAC: 100, 200, 400, 800,1600, 3200 Amp
4-Wire Wye 600 VAC: 100, 200, 400, 800,1600, 3200 Amp
Cable: UL-listed/rated/3-conductor,
300 VAC, 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, 19200, 38400, 76800
Recommended
In-Line Fuse
Manufacturer: Littlefuse
Mfg. Part No: KLDR.100
Rating: 100mA, time-delay, 600VAC
cartridge fuse
62-0397-02 8
CLASS 320 METER
Battery Cell: Description: Non-rechargeable cell used for
memory retention
Manufacturer: Panasonic
Mfg Part No: CR2032
Working Voltage: 3Vdc
Current Capacity 225 mAHr
Electrolyte: Manganese Dioxide Lithium
9 62-0397-02
CLASS 320 METER
4.0 SAFETY LABEL DEFINITIONS AND
INFORMATION
The 320 meter may contain one or more of the following labels. Operator(s) should
familiarize themselves with the meaning of each label to minimize risk.
FCC Notice
This equipment has been tested and found to comply with the limits for a Class B
digital device, pursuant to part 15 of the FCC Rules. These limits are designed to
provide reasonable protection against harmful interference in a residential installation.
This equipment generates, uses and can radiate radio frequency energy and, if not
installed there is no guarantee that interference will not occur in a particular
installation. If this equipment does cause harmful interference to radio or television
reception, which can be determined by turning the equipment off and on, the user is
encouraged to try to correct the interference by one or more of the following measures:
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and receiver
- Connect the equipment into an outlet on a circuit different from that to which the
receiver is connected.
- Consult the dealer or an experienced radio/TV technician for help.
Standards Compliance:
BACnet MS/TP and IP protocol is BTL listed.
LonWorks TP/FT-10 protocol is LonMark® certified.
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.
62-0397-02 10
CLASS 320 METER
CAUTION
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.
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 62-0397-02
CLASS 320 METER
6.0 METER INSTALLATION
6.1 Mounting the Class 320 Meter
6-35/64
(166)
3-25/64
(86)
6-35/64 (166)
3-17/64 (83)
1-5/8
(41)
Ø 1-3/32 (28) THROUGH
NEAR SIDE ONLY
5/8 (16)
7-51/64
(198)
M34684
Fig. 4. Meter Dimensions.
Use appropriately sized mounting hardware to fasten the Class 320 enclosure to the
selected mounting surface. The four housing mounting holes are centered 6.75” H x 4”
W. When the meter is provided in the 4X rain tight plastic enclosure, the hub must be
mounted to the conduit first before connecting it to the enclosure.
NOTE: Units housed in UL type 1 steel enclosures must only be installed in indoor
locations, where they will not be affected by the elements.
62-0397-02 12
CLASS 320 METER
WARNING
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 320 protective earth ground: Connect an earth ground wire
to the Class 320 (Type 1 enclosure) 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 loosen or remove the screw securing the
ground lug.
Fig. 5. Main Power Board Connections.
13 62-0397-02
CLASS 320 METER
6.2 Main Power Board Connections (continued)
3.
Wire Entry:
enclosures. This opening is used for bringing in MAINS power and for current
sensor wiring. One 1/2” conduit opening on the top of the metal enclosure
CL320 can be utilized as an interface for the low- voltage signals, pulse input, or
RS-485 communications wiring to the unit. CL320 meters are available in an
MMU (Multiple Meter Unit) enclosure that holds eight (8) meters (see MMU
installation manual for additional details).This enclosure comes without knockouts and allows the user to choose entry points for the wiring.
Any unused openings must be sealed with a UL rated plugging device or hub
suitable for the rating of the enclosure - such as NEMA 1 or 4X
4. Unit MAINS wiring:
The four positions on 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.
A. Connect the NEUTRAL wire to the appropriate terminal block position.
One 3/4” conduit opening is located on the bottom of the CL320
.
Fig. 6. Terminal Block TB1, TB2, TB3, and TB4.
NOTE: For 3-wire delta-type applications, do NOT connect the NEUTRAL wire.
Remove the terminal block screw for this position.
B. Earth Ground
Connect the Earth Ground to the PCB mounting screw in lower right corner.
C. External Switch Mechanism/In-Line Fuse Installation
To ensure a safe installation, the Class 320 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 320 meter. 1/10 Amp Slow
Activation in line fuses (KLDR.100, UL listed, Littelfuse rated 600V/100ma)
must be installed 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.
62-0397-02 14
CLASS 320 METER
6.2 Main Power Board Connections (continued)
D. Connect the three AC main power wires (Phases A, B and C) to their respec-
tive positions as labeled on terminal block TB1. After all conductors are connected to each of their respective terminal block positions and tightened to 7
in-lb, 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. For single phase connection: connect
two ac main power wires to phases a and b and a jumper wire from b to c factory installed for the Single Phase option.
E. Turn ON the AC main power input. The meter display will light up and scroll
through 6 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 - RMS Amps
Screen 5 - RMS Volts Phase to Neutral
Screen 6 - RMS Volts Phase to Phase
Screen 7 - Power factor (PF) per phase
F. Verify the voltage readings on Screen 5 using an AC voltmeter. Typical read-
ings shown below are measured phase to neutral (L-N) for 4 wire and phase
to phase (L-L) for 3 wire. Readings should be +/- 10% of nominal.
Meter Type Nominal Voltage Limits (+/- 10%)
120/208V, 3ø, 4 Wire
120/240V, 1ø, 3 Wire
120V, 1ø, 2 Wire
277/480V, 3ø, 4 Wire
277V, 1ø, 2 Wire
240V, 3ø, 3 Wire 240 VAC (L-L) 216 to 264 VAC
400V, 3ø, 4 Wire
(380V, 400V, 415V)
480V, 3ø, 3 Wire 480 VAC (L-L) 432 to 528 VAC
600V, 3ø, 4 Wire (WYE
only)
NOTE: Meters are powered by phases A and B. The displayed voltages will be the
measured AC voltage between phases.
120 VAC (L-N) 108 to 132 VAC
277 VAC (L-N) 249 to 305 VAC
230 VAC (L-N) 207 to 253 VAC
347 VAC (L-N) 312 to 380 VAC
15 62-0397-02
CLASS 320 METER
6.3 Phasing of Line Voltage
The 3-phase AC power input or single phase option 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 4-line meter display to scroll to the voltage display. Verify that the meter
reads correct voltages on all three phases. Repeat Step 6.2.4F.
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. Or
Screen 5 (Volts RMS Phase to Neutral): See the section 6.2.4.F.
Screen 6 (Volts RMS Phase to Phase): See the section 6.2.4.F.
Screen 7 (Power Factor Per Phase): There should be 0.0 PF on all three phases.
NOTE: The meter will be reset later via the software during “startup” procedures.
in the Single Phase option - 0.0 in A and B
phases.
Or in the Single Phase option - 0.0 in A and B
phases.
62-0397-02 16
CLASS 320 METER
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. TB2 is the input for Phase A, TB3 is the input for
Phase B and TB4 is the Phase C input. For the Single Phase option: use TB1 pos 5&6
are for the A Phase - TB1 pos 7&8 are for the B phase -factory installed jumper wire on
positions 9&10. Factory installed Jumper should not be removed.
The Class 3200 meter is supplied with two types of 0-2V split or solid-core
current sensors (specified when ordered):
1. Split-core current sensor. This sensor opens so that it can be attached around
the circuit being monitored without interrupting power.
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. 7. 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.
LOAD
SOURCE
M33213
Fig. 8. Split Core Sensor.
IMPORTANT:
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.
17 62-0397-02
CLASS 320 METER
6.4.1 Current Sensor Wiring
Once the current sensors are installed onto their appropriate phase conductors, you
can begin terminating the current sensors onto the Class 320 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 320 meter’s
diagnostic program (on the 4-line display) 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 TB2, TB3, and TB4. 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 the TB2 terminals (Phase A). Tighten the
terminal to 4.5 in-lb. Wait 5 seconds and look at the meter display.
If the meter displays an error message (see below), remove the wires from TB2 (Phase
A) and install them on TB3 (Phase B). if an error message occurs with the sensor
attached toTB3, try again on TB4 (Phase C). The wiring will be correct when the error
indication message is gone.
NOTE: If the power factor being monitored is <65%, the error message may be acti-
The “CT Error: * “message will disappear when the current sensor is connected to the
correct terminals (phase).
Error Messages: CT ERROR: A
NOTE: The Single Phase option will only display errors for A and B.
Refer to the section on Current Sensor Diagnostics for assistance in troubleshooting
these errors.
vated until improved. This is normal and indicates poor power factor.
CT ERROR: A B
CT ERROR: A C
6.4.2 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.
62-0397-02 18
CLASS 320 METER
LINE VOLTAGE
CURRENT SENSORS
N
LOAD SOURCE
1
1
1
2
C
W B W B
N
W B
2
3
3
4
3
4
6.5 Main Power & Current Sensor Wiring Diagram
3-PHASE, 4-WIRE INSTALLATION DIAGRAM
NOTES:
LINE VOLTAGE CONNECTIONS: #14-22 AWG
SENSOR CONNECTIONS: B = BLACK LEAD W = WHITE LEAD
NEUTRAL NOT USED IN DELTA SYSTEM. REMOVE NEUTRAL TERMINAL
BLOCK SCREW FOR DELTA SYSTEMS.
1/10A 600 VAC INLINE FUSE PER CONDUCTOR. LITTLEFUSE PART
1
NUMBER KLDR, 100.
Fig. 9. 3-phase- 4 Wire Installation Diagram
LINE VOLTAGE
A B C
1
1
LOAD SOURCE
N
1
CURRENT SENSORS
A B
W B W B
C
W B
A
B
C
N
M34642
Fig. 10. Single-Phase, 3-Wire, Installation Diagram
19 62-0397-02
CLASS 320 METER
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.
Missing: B 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.
Phase sequence error
not hooked up in the 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 line voltage is missing on Phase B and/or Phase C.
: Indicates that the Single Phase or the 3-phase line voltage is
62-0397-02 20
CLASS 320 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.
6.7 RS-485 Wiring
RS-485 communication allows a computer or modem to communicate with one or
more Class 320 meters. You can connect as many as 52 meters along a 4000 foot RS485 cable run.
Class 320 Smart meters are available with your choice of communication options:
Modbus, BACnet, E-Mon Energy (EZ7) standard. There are two communication
protocols supported by the RS-485 connection; EZ7 and Modbus RTU. The protocol is
selectable via DIP switch S2, located on the Main Power Board. If S2 position 1 is in
the ON position, EZ7 is active. If S2 position 1 is in the OFF position, Modbus RTU* is
active. S2 position 2 is not used on the Class 320. DIP switch S2 positions 3 and 4 to
select the Baud rate for the RS-485 communications. See section 6.9.3 for details on
Baud rate selection. After changing the DIP switch positions, the CPU must be
rebooted by pressing S1 to activate the changes.
21 62-0397-02
CLASS 320 METER
M33195
RS-485
TERMINAL
6.7 RS-485 Wiring (continued)
* An alternate version of firmware is available that replaces Modbus RTU with BACnet
MS/TP.
Modbus.
There are two connection methods, daisy-chain and wire terminal, for RS-485
communications.
Daisy-Chain Method
This is the simplest method for connecting meters together.
The meter must be ordered with this option if BACnet is desired instead of
M32776
Fig. 11. Daisy-chain Configuration.
1. Connect the +(high) terminal of PORT 1 of each meter together so that the + terminals on all meters are linked, + to + to +...
2. Connect the -(low) terminal of PORT 1 of each 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.
4. Torque screws to 2.2 in-lb.
Fig. 12. RS-485 Terminal.
62-0397-02 22
CLASS 320 METER
RJ−11
PLUG
FRONT VIEW
M33196
1 - NC
2 - GND
3 - HIGH
4 - LOW
GND (GREEN)
HIGH (BLACK)
LOW (RED)
2 3 4
6.7 RS-485 Wiring (continued)
6.7.1 RS-485 Bias Resistors
When interfacing the Class 320 meter to certain RS-485 communication equipment, it
may be necessary to add bias resistance to the circuit. If this is required, there is a 2position DIP switch on the meter’s door mounted (display) circuit board. With both
positions in the “ON” position, bias resistance is added to the RS-485 circuit. When
both positions are in the “OFF” position, no bias is added to the RS-485 circuit.
Fig. 13. Bias Resistors DIP Switch.
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.
Local Computer
A local computer installed in the building can communicate with the RS-485 network
utilizing Honeywell’s RS-232 conversion key. The RS-232 key is connected to the RS485 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.
Fig. 14. RS-485 Wiring.
23 62-0397-02
CLASS 320 METER
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 320 meters to a
personal computer that has the Honeywell 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.
UP TO 4000
FEET TOTAL
~
~
~
~
CHANNEL 2
M33309
PC
RS-232 SERIAL
PORT COM1
OR COM2
15 FEET MAX
AC ADAPTER
CHANNEL 1
RS-232
KEY*
CHANNEL 3
UP TO 52
CLASS 3200
METERS
UP TO 4000
FEET TOTAL
UP TO 52
CLASS 3200
METERS
Fig. 15. 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.
62-0397-02 24
CLASS 320 METER
6.8.2 Connecting the RS-232 Key to the Computer (continued)
3. Connect the provided AC adapter into the rear panel input on the RS- 232 key.
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.
NOTE: When the Honeywell Energy™ software is accessed on the computer, a third
LED (RS232 READY) will turn on. This indicator will light up as soon as the
Honeywell Energy software is booted up and the correct COM port is set up
via the settings provided in the software’s Locations menu.
6.8.3 Connecting Class 320 Meters to the RS-232 Key using RS485
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 52 individual meters over a
total cable distance of 4,000 feet. The channels are independent and must not be
connected to each other.
Modular Plug Method
This simple method requires using 4 stranded conductors inside a cable that is fitted
with an RJ-11 type plug for 4-conductor modular systems at the key end of the cable
and open conductors on the meter end.
*Do not use any pre-made telephone cables.
1. Plug the 4-wire RJ-11 cable/plug assembly into Channel A 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 320 meter main power board.
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.
25 62-0397-02
CLASS 320 METER
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 3200
METERS PER
CHANNEL
M33310
UP TO 4000
FEET TOTAL
UP TO 52
CLASS 3200
METERS PER
CHANNEL
CHANNEL 1
AC ADAPTER
PC OR WINDOWS
COMPATIBLE
LOCAL
MODEM
~
~
TELEPHONE
LINK
6.9 Modem Wiring
Fig. 16. Modem Configuration.
62-0397-02 26
CLASS 320 METER
6.9.1 Modem (RS-232 KEY RM)
The RS-232 key with modem connects the entire RS-485 network of Class 320 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.
27 62-0397-02
CLASS 320 METER
M33195
BAUD RATE
SELECTION
SWITCHES
3 4 BAUD RATE
ON ON 9600
OFF ON 19200
ON OFF 38400
OFF OFF 76800
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 on the Class 320 meter is set through positions 3 and 4
on DIP switch S2 on the meter circuit board. The default is 9600 Baud.
1. Select 9600 when using the Class 320 meter with a modem.
2. The Baud rate on the meter must always match the Baud rate selected in the
Honeywell Energy software; otherwise, communications will not function.
3. After a Baud change, press the CPU reset button to register the change.
4. All meters in the daisy-chain circuit must be set at the same Baud rate.
Fig. 17. Baud Rates.
62-0397-02 28
CLASS 320 METER
6.10 Modbus RTU Wiring
The Class 320 Modbus option 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 with BELDEN 1120A cable or
equivalent required. 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. Tighten the terminals to 2.2 in-lb.
Fig. 18. RS-485 Terminal.
The meter is shipped with a Modbus ID number of 02. NOTE: Modbus address must
be changed to 01 for open protocol for BACnet (Optional) to function as specified. 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.
29 62-0397-02
CLASS 320 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 320 Meters to 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. 19. Connecting Class 320 Meters to the USB Key using RS485.
62-0397-02 30
CLASS 320 METER
M33311
ETHERNET
NETWORK
RS-485 DAISY CHAIN (SECTION 6.7)
EKM-E
ETHERNET
KEY
6.13 Ethernet Communications
Ethernet communications connections are available through an optional EKM-E key,
which converts the meter’s RS-485 output to an ethernet connection. The key provides
data only with the EZ-7 protocol and is not designed to support Modbus or BACnet.
NOTE: The meter is not designed to connect directly through an Ethernet connec-
tion, but must utilize an appropriate RS485/Ethernet converter module/
modem.
Class 320 Ethernet/IP Addressable meters can be tied into a local Ethernet network
individually, or a single Ethernet-connected meter can communicate with multiple RS485 daisy-chained conventional (EZ-7) class 320 meters using a single IP address.
Each device (EKM-E) that is connected directly to the ethernet network requires a
unique IP address. With a public IP address, the system can be addressed with
Honeywell Energy software through the internet for remote reading capabilities.
Fig. 20. Ethernet Communications.
31 62-0397-02
CLASS 320 METER
LINE VOLTAGE
Ø
A
Ø
B
LOAD SOURCE
N
LOAD A
LOAD B
CURRENT SENSORS
LOAD SOURCE
Ø
A
Ø
B
N
M31603
ØC
ØC
Ø
AØBØC
Ø
A
ØBØ
C
W B W B W BN
7.0 MULTIPLE-LOAD MONITORING
The Honeywell Class 320 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.
NOTE:-In Single Phase option - sensors must be installed in set of 2 with maximum of three sensors 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.)
Fig. 21. Three Phase Multiple-load Wiring Diagram.
62-0397-02 32
CLASS 320 METER
Ø
AØBØC
Ø
A
ØBØ
C
W B W B W BN
LINE VOLTAGE
Ø
A
Ø
B
LOAD SOURCE
N
LOAD A
LOAD B
CURRENT SENSORS
LOAD SOURCE
Ø
A
Ø
B
N
M33204A
7.0 MULTIPLE-LOAD MONITORING
(CONTINUED)
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.
Fig. 22. Single Phase Multi-Load Wiring Diagram.
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.
33 62-0397-02
CLASS 320 METER
WARNING
CAUTION
M33197
BATTERY
+
–
9.0 LITHIUM BATTERY REPLACEMENT
The Class 320 meter has a lithium coin cell battery, which is used to retain the
contents of SRAM and the RTC during power outages. The battery’s life expectancy is
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
Table 1. Battery specifications at 25 degrees Celsius.
Replace battery with Panasonic part number CR2032 only. Use of another
battery may present a risk of fire or explosion. See owner’s manual for safety
instructions.
The battery cell is mounted in a coin cell holder on the upper right side of the main
power board. The internal unit firmware will set a flag to indicate the low battery
condition. When the unit data is next downloaded, the monitoring facility will be alerted
of the low battery condition and will schedule a service call.
Battery may explode if mistreated. Do Not recharge, disassemble, or dispose
of in fire.
62-0397-02 34
Fig. 23. Lithium Battery Cell.
CLASS 320 METER
CAUTION
CAUTION
9.0 LITHIUM BATTERY REPLACEMENT
(CONTINUED)
Use the following procedure to replace the lithium battery cell.
The battery is not completely discharged; therefore, DO NOT short the
terminals on the battery with any conductive material.
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. T o discharge yourself, touch a grounded metal
object such as conduit or a metal enclosure interior.
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 PCB battery holder.
NOTE: Care should be taken to ensure that the replacement battery is installed with
the same polarity as the battery that was removed. No damage to the unit or
battery will occur if battery is inadvertently installed in the wrong polarity.
4. Dispose of the used battery in accordance with the manufacturer’s (Panasonic’s)
instructions.
35 62-0397-02
CLASS 320 METER
*Note: Single Phase option will state: MD 2P 208V 200A 60H
*
*
10.0 CLASS 320 METER
OPERATING MODES
The Honeywell Class 320 meter is used to monitor electric power usage of individual
loads after the utility meter and store kW and kVAR data for automatic meter reading.
Fig. 24. Class 320 Stand Alone Meter with 4 Line Display.
10.1 Start Up Screens
When the meter starts up, the screen displays firmware image type.
CL320 and M, After approximately 4 seconds, the screen displays active
configurations: EZ7 ID, Meter configurations – phase, voltage, amperage, Calibration
factors or serial number, Date/time and firmware version.
Fig. 25. Start Up Screens.
62-0397-02 36
CLASS 320 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.
Note: Single Phase option will only state:
PH-A and PH-B.
Screen 5: Average Voltage (volts)
Per Phase.
Note: Single Phase option will only state:
PH-A and PH-B.
Screen 6: Average Voltage (volts)
Phase to Phase.
Note: Single Phase option will only state:
P-AB and P-BA.
Screen 7: Power Factor (pf)
Per Phase.
Note: Single Phase option will only state:
PH-A and PH-B.
10.2 Normal Mode Display Screens
The Class 320 meter features seven Normal Mode Display Screens for monitoring the
meter. Each screen is displayed for 5 second intervals, before scrolling onto the next
screen. You can “lock” the scrolling display on any one of the seven screens. This will
be explained in detail on following pages.
Explanations of the Normal Mode Display Screens are as follows:
Fig. 26. Class 320 Meter Display Screens.
37 62-0397-02
CLASS 320 METER
M33279
DOWN
UP
SELECT
MENU
Fig. 27. Push Buttons.
10.3 How to Program the Display Screens
The display information can be programed using four push buttons switches. The push
buttons (DOWN, UP, SELECT, MENU) are located at the bottom of the display board
on the inside front door of the meter. The buttons are used to program the following:
• Date & Time (This field sets the month, day, year, and time.)
• Device ID (This field changes the default setting, which is 1A for EZ7 and 1 for
ModBus.)
• Reset KW/KWH Read (This field resets the Peak kW Demand to zero.)
62-0397-02 38
CLASS 320 METER
Date & Time
Device ID
Reset KW/KWH Read
Exit
DATE: 02-16-2012
TIME: 01:57:36
10.3.1 Date & Time
To change the date and time, complete the following steps:
1. Press the MENU button.
2. The following screen will appear:
3. Press the SELECT button. The date and time screen will appear, and the 2 digit
month will be blinking.
4. Use UP or DOWN button to make changes, press SEL button to advance to the
next field. Press MENU button to return to main menu.
5. If changes were made, you’ll be asked to save, press UP or DOWN to select Y or
N; press SEL to proceed returning to main menu. In main menu, select EXIT to
get out of programming mode and return to normal display mode.
39 62-0397-02
CLASS 320 METER
Date & Time
Device ID
Reset KW/KWH Read
Exit
EZ7 ID: 1A
MODBUS ID: 2
Save Change? Y
10.3.2 Device I.D.
To change Device I.D., complete the following steps:
1. Press the MENU button.
2. The following screen will appear:
3. Use the UP and DOWN buttons to select the Device ID line.
Press the SELECT button. The Device I.D. screen will appear.
4. Locate the number to be changed in the menu, press and hold Button 4 (Down
Button) for 3 seconds, release the button, the last digit for this number blinks,;
5. To change the number of the digit, use Button 3 (Up Button) to cycle
through 0 to 9.
6. Press Button 4 to move to the next digit, and repeat Step 5.
7. To exit the mode of changing number by digit, press Select Button;
To save the new number, press Main Menu Button and select “Y” to save.
62-0397-02 40
CLASS 320 METER
Date & Time
Device ID
Reset KW/KWH Read
Exit
Reset kW only? N
Reset all? N
10.3.3 Peak Demand Reset
To reset the recorded peak kW demand, complete the following steps:
1. Press the MENU button until “Reset kW/kWh Read” is indicated by the arrow on
the display.
2. Press the SELECT button. The following screen will appear on the display.
3. Press the UP button to change the N to a Y after “Reset kW only?”.
4. The peak demand will be reset to zero and the meter will return to its normal
scrolling display mode.
41 62-0397-02
CLASS 320 METER
10.3.4 Display Hold Feature
You can “lock” the scrolling display so that it will stay locked on any one of the seven
screens.
To stop the display from scrolling, complete the following steps:
1. Press the UP and DOWN buttons to choose which of the six screens you would
like to display.
2. 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.
3. Pressing Select again will show the message HOLD6. This will lock the display
for 6 HOURS.
4. 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.
** Be sure to exit from the HOLD mode when you are done using this feature.
62-0397-02 42
CLASS 320 METER
11.0 HIGH VOLTAGE METERING
kWh Meter Installation Instructions for Use with
Honeywell Meters in High Voltage Applications
The Honeywell model # E32-12025HV kWh meter is designed to be used for
monitoring high voltage (2400, 4160, 13200, etc) circuits, either “stand alone” or in an
AMR application.
This meter is intended to be used with the appropriate high voltage Potential
Transformers (PTs) and Current Transformers CTs) supplied by others. The meter
application is centered around a 120 VAC secondary output from the high voltage PTs
and a 5 amp secondary output from the high voltage CTs.
Items addressed by this document include the installation of the E32-12025HV kWh
meter on high voltage circuits as well as the calculations to provide the correct meter
multiplier based on the PT and CT sizes used on the high voltage conductors.
Installation should be performed by qualified personnel and only according to all
applicable electrical codes.
High Voltage CTs (supplied by others) reduce the primary current (amps) to a directly
proportional 0~5 amp secondary output. As an example, a 0~400 amp primary
becomes a 0~5 amp proportional signal from the secondary output. In our application,
the high voltage CT secondary is installed as a continuous “loop”, with a single
conductor connected to both secondary terminals.
To convert the 0~5 amp signal to a 0~ 2 volt signal, Honeywell’s Current Sensors are
installed on the CT secondary conductor. A set of 25 amp sensors is used in this
application. These sensors have the high voltage CT secondary conductor passed
through them five (5) times (see below) by looping the secondary conductor as shown
in the drawing. The reason for this is so that the 5 amp secondary now appears to the
current sensor as a 0~25 amp signal. This creates a conversion of the CT’s primary
current to a directly proportional 0~ 2 volt signal which is utilized by the Honeywell
meter. The example from the first paragraph has now become a 400 amp to 2 volt
device, by this technique.
43 62-0397-02
CLASS 320 METER
M34227
PASS #2
PASS #3
PASS #4
PASS #5
PASS #1
Fig. 28. High Voltage CTs.
Fig. 29. Wiring Diagram For 3-wire High Voltage Circuits.
62-0397-02 44
M34228
CLASS 320 METER
This special high voltage meter installation shows the correct wiring procedure for 4wire high voltage circuits. In this application, the 3 element meter connection is used
on the secondary circuits of the user supplied high voltage PTs and CTs.
The Honeywell meter used in this application is the model E32-12025HV kWh meter.
Installation of these meters requires the use of three (3) current sensors mounted on
the secondaries of the high voltage Current Transformers. See the drawing above for
proper wiring. For correct operation, the meter must be installed correctly.
This special high voltage meter installation utilizes high voltage PTs (Potential
Transformers) and CTs (Current Transformers) supplied by others. The Honeywell
meter is installed using the secondary outputs of these devices.
High voltage PTs reduce the primary voltage (4160v, 13200v, etc.) to a Secondary
output of 120v. This secondary is connected to the Honeywell meter voltage inputs as
shown in the wiring diagram. High voltage CTs reduce the primary current (amps) to a
directly proportional 0~5 amp output. As an example, a 0~400 amp primary becomes a
0~5 amp proportional signal from the secondary output. This allows much smaller
wiring to be utilized in the meter hookup. The high voltage CT secondary is installed as
a continuous “loop”, with a single lead connected to both secondary terminals.
Honeywell meters accept a 0~2 volt signal from their Current Sensors. To convert the
0~5 amp signal, the Current Sensors are installed on the CT secondary lead. A set of
25 amp sensors is used in this application. These sensors have the high voltage CT
secondary lead passed through them five (5) times by looping the wire as shown in the
drawing. This allows a direct conversion of the CTs primary current to a directly
proportional 0~2 volt signal, which is used by the meter.
Since there is a signal ratio introduced by the high voltage CTs and PTs, it will be
necessary to multiply the number on the meter’s display for a correct reading. The
meter multiplier is calculated by using the CT ratio and the PT Ratio. [PTr x CTr /
Number of Secondary Lead Passes Through Sensor]. The Honeywell 25 amp HV kWh
meter with 5 wraps of the high voltage CT secondary will have its multiplier calculated
by the formula shown below.
EXAMPLE: CT = 400:5 = 80:1 (CTr = 80)
PT = 4200:120 = 35:1 (PTr = 35)
Wraps (Passes) = 5
METER MULTIPLIER
= PTr x (CTr/Wraps)
35 x (80/5)
35 x (16) = 560
45 62-0397-02
CLASS 320 METER
12.0 CLASS 320 PROTOCOL DEFINITIONS
ModBus Customer Point Map: CL320
Address Registers Format Description Units
1
40001
40001
40005
40007
41001
41003
41005
41007
41009 2 Float Real power kW R
41011 2 Float Reactive power kVAR R
2 Integer Energy delivered Wh Pulse R/W
1
2 Integer Energy received Wh Pulse R/W
1
2 Integer Reactive energy delivered VARh Pulse R/W
1
2 Integer Reactive energy received VARh Pulse R/W
1
2 Float Energy delivered kWh R/W
1
2 Float Energy received kWh R/W
1
2 Float Reactive energy delivered kVARh R/W
1
2 Float Reactive energy received kVARh R/W
CL
320
41013 2 Float Apparent power kVA R
41015 2 Float Power factor % PF R
41017 2 Float Peak demand kW R
41019 2 Float Current average Amps R
41021 2 Float Voltage line-neutral Volts-N R
41023 2 Float Voltage line-line Volts-L R
41025 2 Float Frequency Hz R
41027 2 Float Phase angle Degree R
41029 2 Float Real power, phase A kW R
41031 2 Float Real power, phase B kW R
62-0397-02 46
CLASS 320 METER
ModBus Customer Point Map: CL320
Address Registers Format Description Units
41033 2 Float Real power, phase C kW R
41035 2 Float Reactive power, phase A kVAR R
41037 2 Float Reactive power, phase B kVAR R
41039 2 Float Reactive power, phase C kVAR R
41041 2 Float Apparent power, phase A kVA R
41043 2 Float Apparent power, phase B kVA R
41045 2 Float Apparent power, phase C kVA R
41047 2 Float Power factor, phase A % PF R
41049 2 Float Power factor, phase B % PF R
41051 2 Float Power factor, phase C % PF R
41053 2 Float Current, phase A Amps R
CL
320
41055 2 Float Current, phase B Amps R
41057 2 Float Current, phase C Amps R
41059 2 Float Voltage, line to neutral, phase A-N Volts-N R
41061 2 Float Voltage, line to neutral, phase B-N Volts-N R
41063 2 Float Voltage, line to neutral, phase C-N Volts-N R
41065 2 Float Voltage, line to line, phase A-B Volts-L R
41067 2 Float Voltage, line to line, phase B-C Volts-L R
41069 2 Float Voltage, line to line, phase C-A Volts-L R
41071 2 Float Phase angle, phase A Degree R
41073 2 Float Phase angle, phase B Degree R
41075 2 Float Phase angle, phase C Degree R
47 62-0397-02
CLASS 320 METER
ModBus Customer Point Map: CL320
Address Registers Format Description Units
3
44001
44007
45501
46025
46049
6 Custom Interval Day Block R/W
4
1 per
Integer Interval Data Pulse R
interval
5
2 per day Custom Interval Data Headers R
6
8 Custom RTC Date/Time R/W
7
8 Custom EZ7 ID, ModBus ID, Serial Number R/W
CL
320
46057 8 Custom Recorder Info., Demand Interval R/W
46513 8 Custom Flags L1: Power Failure, Battery R
46521 8 Custom Flags L2: Power Failure Date R
1. To clear single meter kWh/kVARh, set multiple points at 40001 or 41001 for 8 points
with data set to 0000 0000 0000 0000 0000 0000 0000 0000.
2. External inputs are standard on Class 500 meters.
To clear external inputs, set multiple points at 41083 or 41085 for 2 points with data
set to 0000 0000. Jumper J6 must be closed.
3. To set the interval data day block, set multiple points at 44001 for 6 points with data
set to 0C0I 0000 MMDD YYYY 0000 0000.
0C = Channel, 0I = Interval (0F = 15 minute intervals, 05 = 5 minute intervals)
4. Each register represents a 15 or 5 minute kWh pulse value based on the interval
day block. 96 registers max with 15 minute intervals. 288 registers max with 5 minute
intervals. The first interval data register 44007 represents the pulse count for the first
15 or 5 minute interval beginning at midnight.
5. The interval data headers represent days with available interval data. Each day
represents 2 registers. Format: MMDD YYYY.
6. To set the date and time, set multiple points at 46025 for 4 points with data set to
HHMM SSDW MMDD YYYY (DW=day of week)
7. To change the ModBus ID, set single point at 46050 with data set to new ModBus
ID (e.g. 1 to 247). Jumper J6 must be closed.
62-0397-02 48
Instance IDBACnet
Object Description Units
1
1
1
2
1
3
1
4
5Analog
Analog
Input
Analog
Input
Analog
Input
Analog
Input
Energy delivered kWh Present Value R
Energy received kWh Present Value R
Reactive energy delivered kVARh Present Value R
Reactive energy received kVARh Present Value R
Real power kW Present Value R
Input
6Analog
Reactive power kVAR Present Value R
Input
7Analog
Apparent power kVA Present Value R
Input
8Analog
Power factor % PF Present Value R
Input
9Analog
Peak demand kW Present Value R
Input
10 Analog
Current average Amps Present Value R
Input
11 Analog
Voltage line-neutral Volts-N Present Value R
Input
12 Analog
Voltage line-line Volts-L Present Value R
Input
13 Analog
Frequency Hz Present Value R
Input
14 Analog
Phase angle Degree Present Value R
Input
15 Analog
Real power phase A kW Present Value R
Input
16 Analog
Real power phase B kW Present Value R
Input
17 Analog
Real power phase C kW Present Value R
Input
18 Analog
Reactive power phase A kVAR Present Value R
Input
19 Analog
Reactive power phase B kVAR Present Value R
Input
CLASS 320 METER
BACnet Object Descriptors: CL320
BACnet
PropertyCL320
49 62-0397-02
CLASS 320 METER
Instance IDBACnet
Object Description Units
20 Analog
Input
21 Analog
Input
22 Analog
Input
23 Analog
Input
24 Analog
Input
25 Analog
Input
26 Analog
Input
27 Analog
Input
28 Analog
Input
29 Analog
Input
30 Analog
Input
31 Analog
Input
32 Analog
Input
33 Analog
Input
34 Analog
Input
35 Analog
Input
36 Analog
Input
37 Analog
Input
38 Analog
Input
BACnet Object Descriptors: CL320
BACnet
PropertyCL320
Reactive power phase C kVAR Present Value R
Apparent power phase A kVA Present Value R
Apparent power phase B kVA Present Value R
Apparent power phase C kVA Present Value R
Power factor phase A % PF Present Value R
Power factor phase B % PF Present Value R
Power factor phase C % PF Present Value R
Current phase A Amps Present Value R
Current phase B Amps Present Value R
Current phase C Amps Present Value R
Voltage line-neutral phase A-N Volts-N Present Value R
Voltage line-neutral phase B-N Volts-N Present Value R
Voltage line-neutral phase C-N Volts-N Present Value R
Voltage line-line phase A-B Volts-L Present Value R
Voltage line-line phase B-C Volts-L Present Value R
Voltage line-line phase C-A Volts-L Present Value R
Phase angle phase A Degree Present Value R
Phase angle phase B Degree Present Value R
Phase angle phase C Degree Present Value R
62-0397-02 50
CLASS 320 METER
BACnet Object Descriptors: CL320
Instance IDBACnet
Object Description Units
39 Analog
Reserve A No units Present Value R
BACnet
PropertyCL320
Input
40 Analog
Reserve B No units Present Value R
Input
41 Analog
Reserve C No units Present Value R
Input
2
42
43
Analog
Input
2
Analog
Input
External Input 1 Pulse Present Value
External Input 2 Pulse Present Value
1. To clear single meter kWh/kVARh, select reset kW/kWh on the display menu of the
meter. This function will also reset external inputs. Jumper J6 must be closed.
2. External inputs are standard on Class 5000 meters and optional on Class 3400
meters (Part of Expanded Feature Package). To clear external inputs, select reset kW/
kWh on the display menu of the meter. This function will also reset kW/kVARh. Jumper
J6 must be closed.
51 62-0397-02
CLASS 320 METER
Instance ID BACnet Object BACnet Property CL320
BACnet Device ID Device Object identifier R
BACnet Device ID Device Object name R
BACnet Device ID Device Object type R
BACnet Device ID Device System status R/W
BACnet Device ID Device Vendor name R
BACnet Device ID Device Vendor Identifier R
BACnet Device ID Device Model name R
BACnet Device ID Device Firmware revision R
BACnet Device ID Device Application software version R
BACnet Device ID Device Location R/W
BACnet Device ID Device Description R/W
BACnet Device ID Device Protocol version R
BACnet Device ID Device Protocol services supported R
BACnet Device ID Device Protocol object types supported R
BACnet Device ID Device Protocol revision R
BACnet Device ID Device Object list R
BACnet Device ID Device Max APDU length supported R
BACnet Device ID Device Segmentation supported R
BACnet Device ID Device Local time R
BACnet Device ID Device Local date R
BACnet Device ID Device APDU time out R/W
BACnet Device ID Device Number of APDU retries R/W
BACnet Device ID Device Device address binding R
62-0397-02 52
CLASS 320 METER
13.0 LIMITED METER WARRANTY
Subject to the exclusions listed below, Honeywell 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. Honeywell 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 Honeywell’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 Honeywell.
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 Honeywell’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 Honeywell’s control or other force majeure events or (v)
used in conjunction with equipment, components, accessories, parts or materials not supplied or approved by Honeywell.
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 HONEYWELL 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, HONEYWELL MAKES NO
WARRANTY OF ANY KIND, EXPRESS OR IMPLIED WITH RESPECT TO ANY
PRODUCTS, PARTS OR SERVICES PROVIDED BY HONEYWELL INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. PRODUCTS OR
COMPONENTS DISTRIBUTED, BUT NOT MANUFACTURED, BY HONEYWELL ARE NOT WARRANTED BY HONEYWELL 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.
53 62-0397-02
CLASS 320 METER
62-0397-02 54
CLASS 320 METER
55 62-0397-02
CLASS 320 METER
Automation and Control Solutions
Honeywell International Inc.
1985 Douglas Drive North
Golden Valley, MN 55422
customer.honeywell.com
® U.S. Registered Trademark
© 2013 Honeywell International Inc.
62-0397-02 JPG Rev. 07-13
Printed in United States
Loading...