Emerson Energy Meter Operation Manual

Energy Meter Installation and
Operation Manual

026-1726 Rev 2

Emerson Digital Solutions

1065 Big Shanty Road NW, Suite 100

Kennesaw, GA 30144 USA

770-425-2724 • 1-800-829-2724

www.climate.emerson.com

Email: [e-mail]

Contents

1 INTRODUCTION.......................................................................................................................................................... 1

1.1 S

PECIFICATIONS............................................................................................................................................................. 2

1.2 N

OTICE .......................................................................................................................................................................... 3

1.2.1 FCC Part 15 Information ...................................................................................................................................... 3

2 OVERVIEW ................................................................................................................................................................... 4

2.1 D

IMENSIONS .................................................................................................................................................................. 4

2.2 P

RODUCT DIAGRAM ...................................................................................................................................................... 4

3 INSTALLATION ........................................................................................................................................................... 5

3.1 T

YPES OF MOUNTING .................................................................................................................................................... 5

3.1.1 DIN Rail Mounting................................................................................................................................................. 5

3.1.2 Screw Mounting ..................................................................................................................................................... 5

3.2 S

UPPORTED SYSTEM TYPES........................................................................................................................................... 5

4 WIRING.......................................................................................................................................................................... 7

4.1 W

IRING DIAGRAMS ...................................................................................................................................................... 7

4.2 C

ONTROL POWER .......................................................................................................................................................... 9

4.2.1 Fuse Recommendations.......................................................................................................................................... 9

4.3 W

IRING CONNECTION TO SITE SUPERVISOR ............................................................................................................... 10

4.4 W

IRING CONNECTION TO E2....................................................................................................................................... 11

5 DISPLAY SCREEN DIAGRAM................................................................................................................................ 12

5.1 LCD S

5.2 B

CREEN .............................................................................................................................................................. 12

UTTONS ..................................................................................................................................................................... 12

6 NETWORK SETUP AND COMMISSIONING ....................................................................................................... 13

6.1 S

ET UP NETWORK PORTS ............................................................................................................................................ 13

6.2 A

DDING AN ENERGY METER....................................................................................................................................... 14

6.3 RS-485 C

OMMUNICATIONS ......................................................................................................................................... 15

6.3.1 Daisy-chaining Devices to the Energy Meter ...................................................................................................... 15

7 QUICK SETUP INSTRUCTIONS............................................................................................................................. 17

8 SOLID-STATE PULSE OUTPUT ............................................................................................................................. 18

8.1 S

ET PULSE ................................................................................................................................................................... 18

8.2 S

ET PULSE ENERGY – WH/P ....................................................................................................................................... 18

8.3 M

INIMUM DURATION TIME – MILLISECONDS PER PULSE (MS/P)............................................................................... 18

8.4 M

ULTIFLEX I/O BOARD PULSE LIMITS - STANDALONE VERSION ONLY.................................................................... 19

9 UI MENU ABBREVIATIONS ................................................................................................................................... 20

10 USER INTERFACE FOR DATA CONFIGURATION ...................................................................................... 21

11 ALERT/RESET INFORMATION........................................................................................................................... 22

12 USER INTERFACE FOR SETUP ......................................................................................................................... 23

13 ENERGY METER STANDARD MODBUS DEFAULT SETTINGS ................................................................. 25

14 TROUBLESHOOTING ............................................................................................................................................ 26

APPENDIX OF COMPATIBLE CURRENT TRANSDUCERS ................................................................................. 27

Contents • v

1 Introduction

The Energy Meter (P/N 250-5000) provides a solution for
measuring energy data with a single device. Inputs include
Control Power, CT, and 3-phase voltage. The Energy
Meter supports multiple output options, including solid
state relay contacts, Modbus, and pulse. The LCD screen
on the faceplate allows instant output viewing.

The meter is housed in a plastic enclosure suitable for
installation on T35 DIN rail according to EN50022. The
Energy Meter can be mounted with any orientation over
the entire ambient temperature range, either on a DIN rail
or in a panel. The meter is not sensitive to CT orientation
to reduce installation errors.

For use in a Pollution Degree 2 or better environment
only. A Pollution Degree 2 environment must control
conductive pollution and the possibility of condensation or
high humidity. Consider the enclosure, the correct use of
ventilation, thermal properties of the equipment, and the
relationship with the environment. Installation category:
CAT II or CAT III.

Provide a disconnect device to disconnect the Energy
Meter from the supply source. Place this device in close
proximity to the equipment and within easy reach of the
operator, and mark it as the disconnecting device. The
disconnecting device shall meet the relevant requirements
of IEC 60947-1 and IEC 60947-3 and shall be suitable for
the application. In the US and Canada, disconnecting fuse
holders can be used. Provide over-current protection and
disconnecting device for supply conductors with approved
current limiting devices suitable for protecting the wiring.
If the equipment is used in a manner not specified by the
manufacturer, the protection provided by the device may
be impaired.

WARNING! HAZARD OF ELECTRIC
SHOCK, EXPLOSION, OR ARC FLASH

• Follow safe electrical work practices. See NFPA
70E in the USA, or applicable local codes.

• This equipment must only be installed and
serviced by qualified electrical personnel.

• Read, understand and follow the instructions
before installing this product.

• Turn off all power supplying equipment before
working on or inside the equipment.

• Any covers that may be displaced during the
installation must be reinstalled before powering
the unit.

• Use a properly rated voltage sensing device to
confirm power is off.

DO NOT DEPEND ON THIS PRODUCT FOR
VOLTAGE INDICATION.

Failure to follow these instructions will result in death
or serious injury.

Introduction • 1

1.1 Specifications

Measurement Accuracy

Real Power and
Energy

Reactive Power
and Energy

Current

Voltage

Sample Rate 2520 samples per second

Data Update Rate 1 sec

Type of
Measurement

Input Voltage Characteristics

Measured AC
Voltage

Metering Over­Range

Impedance

Frequency Range 45 to 65 Hz

Input Current Characteristics

CT Scaling Primary: Adjustable from 5A to 32,000A

Measurement Input
Range

Impedance 10.6kΩ (1/3 V mode) or 32.1kΩ (1 V mode)

Control Power

AC

DC* 3W max.; UL and CE: 125 to 300VDC

Ride Through Time 100 msec at 120VAC

Output

Alarm Contacts
(all models)

Table 1-1 - Energy Meter Specifications

IEC 62053-22 Class 0.5S, ANSI C12.20

0.5%

IEC 62053-23 Class 2, 2%

0.4% (+0.015% per °C deviation from
25°C) from 5% to 100% of range;

0.8% (+0.015% per °C deviation from
25°C) from 1% to 5% of range

0.4% (+0.015% per °C deviation from
25°C) from 90V

to 600VAC

L-L

L-L

True RMS up to the 21st harmonic 60 Hz
One to three phase AC system

Minimum 90V

L-N

(156V

) for stated

L-L

accuracy;
UL Maximums: 600V

CE Maximums: 300V

L-L

L-N

(347V
(520V

L-N

L-L

)
)

+20%

2.5 MΩ

L-N

/5 MΩ

L-L

0 to 0.333VAC or 0 to 1.0VAC (+20% over­range)

5VA max.; 90V min.
UL Maximums: 600V

CE Maximums: 300V

L-L

L-N

(347V
(520V

L-N

L-L

)
)

N.C., static output
(30VAC/DC, 100mA max. @ 25°C,
derate 0.56mA per °C above 25°C)

Real Energy Pulse
Contacts (all

N.O., static output

models) AND

Reactive Energy
Pulse Contacts

(30VAC/DC, 100mA max. @ 25°C,
derate 0.56mA per °C above 25°C)

RS-485 Port 2-wire, 1200 to 38400 baud, Modbus RTU

Mechanical Characteristics

Weight 0.62 lb (0.28 kg)

IP Degree of
Protection (IEC

IP40 front display; IP20 Meter

60529)

Display
Characteristics

Terminal Block
Screw Torque

Terminal Block
Wire Size

Back-lit blue LCD

0.37 ft-lb (0.5 N.m) nominal/0.44 ft-lb (0.6
N.m) max.

2

26 to 14 AWG (0.13 to 2.08 mm

)

Rail T35 (35mm) DIN Rail per EN50022

Environmental Conditions

Operating
Temperature

Storage
Temperature

-30°C to 70°C (86°F to 158°F)

-40°C to 85°C (-40°F to 185°F)

Humidity Range <95% RH (non-condensing)

Altitude of
Operation

3 km max.

Metering Category

US and Canada

CE

Dielectric
Withstand

Conducted and
Radiated Emissions

Conducted and
Radiated Immunity

CAT III; for distribution systems up to
347 V

/600VAC

L-N

L-L

CAT III; for distribution systems up to
300 V

/480VAC

L-N

L-L

Per UL 508, EN61010

FCC part 15 Class B, EN55011/EN61000
Class B
(residential and light industrial)

EN61000 Class A (heavy industrial)

Safety

US and Canada
(cULus)

UL508 (open type device)/CSA 22.2 No.
14-05

Europe (CE) EN61010-1:2001

Table 1-1 - Energy Meter Specifications

*External DC current limiting is required,
see Section 4.2.1, Fuse Recommendations.

2 • Energy Meter Installation and Operation Manual 026-1726 Rev 2

1.2 Notice

• This product is not intended for life or safety applications.

• Do not install this product in hazardous or classified locations.

• The installer is responsible for conformance to all applicable codes.

• Mount this product inside a suitable fire and electrical enclosure.

1.2.1 FCC Part 15 Information

NOTE: This equipment has been tested by the manufacturer 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 when the equipment is operated in a residential
environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used
in accordance with the instruction manual, may cause harmful interference to radio communications. Operation
of this equipment in a residential area may cause harmful interference in which case the user will be required to
correct the interference at his own expense. Modifications to this product without the express authorization of
Emerson nullify this statement.

Notice Introduction • 3

2 Overview

2.1 Dimensions 2.2 Product Diagram

Figure 2-1 - Energy Meter Dimensions

Figure 2-2 - Bottom View (DIN Mount Option)

Figure 2-4 - Energy Meter Interface

Figure 2-5 - Four Output Options

Figure 2-3 - Bottom View (Screw Mount Option)

4 • Energy Meter Installation and Operation Manual 026-1726 Rev 2

3 Installation

WARNING! Disconnect power prior to
installation.

Any covers that may be displaced during the
installation must be reinstalled before powering the
unit.

Mount the Energy Meter in an appropriate electrical
enclosure near equipment to be monitored.

Exposure to VFD harmonics may cause permanent
damage to this device.

3.1 Types of Mounting

The Energy Meter can be mounted in two ways: on
standard 35 mm DIN rail or screw-mounted to the
interior surface of the enclosure.

3.1.1 DIN Rail Mounting

2. Use three #8 screws (not supplied) to mount the
Energy Meter to the inside of the enclosure. See
diagram of the underside of the Energy Meter
(below).

Figure 3-2 - Screw Mounting

1. Attach mounting clips to the underside of the
Energy Meter by sliding them into the slots from
the inside. The outside edge of the clip must be
flush with the outside edge of the Energy Meter.

2. Snap the clips onto the DIN rail. See diagram of
the underside of the Energy Meter (below).

Figure 3-1

- DIN Rail Mounting

3. To prevent horizontal shifting across the DIN
rail, use two AV02 end stop clips.

3.1.2 Screw Mounting

3.2 Supported System
Types

The Energy Meter Series has a number of different
possible system wiring configurations (see Section 4,
Wiring). To configure the meter, set the System Type via
the User Interface or Modbus register 130 (if so equipped).
The System Type tells the meter which of its current and
voltage inputs are valid, which are to be ignored, and if
neutral is connected. Setting the correct System Type
prevents unwanted energy accumulation on unused
inputs, selects the formula to calculate the Theoretical
Maximum System Power, and determines which phase
loss algorithm is to be used. The phase loss algorithm is
configured as a percent of the Line-to-Line System
Voltage (except when in System Type 10) and also
calculates the expected Line to Neutral voltages for system
types that have Neutral (12 & 40).

1. Attach the mounting clips to the underside of the
Energy Meter by sliding them into the slots from
the outside. The screw hole must be exposed on
the outside of the housing.

Types of Mounting Installation • 5

Values that are not valid in a particular System Type will display as “----” on the User Interface or as QNAN in the
Modbus registers.

CTs Voltage Connections System Type Phase Loss Measurements

Number
of wires

Single-Phase Wiring

2 1 A 2 A,N L-N 10 1L+1n AN 1

2 1 A 2 A,B L-L 11 2L AB 2

3 2 A,B 3 A,B,N L-L with N 12 2L+1n AB AN,BN AN-BN 3

Three-Phase Wiring

3 3 A,B,C 3 A,B,C Delta 31 3L

4 3 A,B,C 4 A,B,C,N

Qty ID Qty ID Type

Grounded
Wye

Modbus
Register
130

40 3L+1n

User
Interface:
SETUP>S
SYS

VLL VLN Balance

AB, BC,
CA

AB, BC, CAAN, BN,

CN

AB-BC-CA 4

AN-BN-CN
&
AB-BC-CA

Table 3-1 - System Types

Wiring

Diagram

Diagram
number

5, 6

6 • Energy Meter Installation and Operation Manual 026-1726 Rev 2

4 Wiring

To avoid distortion, use parallel wires for control power
and voltage inputs.

The following symbols are used in the wiring diagrams on
the following pages.

Symbol Description

Voltage Disconnect Switch

Fuse (installer is responsible for
ensuring compliance with
local requirements. No fuses are
included with the Energy Meter.)

Earth ground

Current Transducer

4.1 Wiring Diagrams

Potential Transformer

Protection containing a voltage
disconnect switch with a fuse or
disconnect circuit breaker. The
protection device must be rated for
the available short-circuit current at
the connection point.

Table 4-1 -Diagram Symbols

WARNING! This product is designed only for
use with 1V or 0.33V current transformers
(CTs).

DO NOT USE CURRENT OUTPUT
(For example, 5A) CTs ON THIS PRODUCT.

Failure to follow these instructions can result in
overheating and permanent equipment damage.

Figure 4-1 - 1-Phase Line-to-Neutral 2- Wire System 1 CT

Figure 4-2 - 1-Phase Line-to-Line 2-Wire System 1 CT

Wiring Diagrams Wiring • 7

Figure 4-3 - 1-Phase Direct Voltage Connection 2 CT

Figure 4-5 - 3-Phase 4-Wire Wye Direct Voltage Input

Connection 3 CT

Figure 4-4 - 3-Phase 3-Wire 3 CT no PT

Figure 4-6 - 3-Phase 4-Wire Wye Connection 3 CT 3 PT

WARNING! CTs are referenced to the meter’s
neutral (N).

8 • Energy Meter Installation and Operation Manual 026-1726 Rev 2

4.2 Control Power

Figure 4-7

Figure 4-8 - Direct Connect Control Power (Phase to Neutral)

- Direct Connect Control Power (Phase to Phase)

Figure 4-10 - Control Power Transformer (CPT) Connection

4.2.1 Fuse Recommendations

Keep the fuses close to the power source (obey local and
national code requirements).

For selecting fuses and circuit breakers, use the following
criteria:

• Current interrupt capacity should be selected based
on the installation category and fault current
capability.

• Over-current protection should be selected with a
time delay.

• The voltage rating should be sufficient for the input
voltage applied.

• Provide over-current protection and disconnecting
devices appropriate for the wiring.

• The earth connection is required for
electromagnetic compatibility (EMC) and is not a
protective earth ground.

Figure 4-9 - Control Power Transformer (CPT) Connection

Control Power Wiring • 9

4.3 Wiring Connection to Site Supervisor

Figure 4-11 - Site Supervisor Wiring

10 • Energy Meter Installation and Operation Manual 026-1726 Rev 2

4.4 Wiring Connection to E2

RS

485 MODBUS

CON

NECTORS

E2 Power Interface
Board (PIB)

+485

-485
0V

ECT MODBUS
CONNECTOR on the
Energ y Meter

BLACK

WHITE

SHIELD

+485 -4850V

W

H

I

T

E

B

LA

C

K

S

H

I

E

L

D

+ - S

REVERSE POLARITY
Energy Meter +Data to the E2 RS485 ­Energy Meter -D ata to the E2 RS485 +

Figure 4-12 - E2 MODBUS connection

Connect the network cable to the three-terminal connector on the COM port that has been configured for the
Energy Meter. The Energy Meter polarity markings are the inverse of E2; connect the Energy Meter +Data wire
to the E2 RS485 - terminal and connect the Energy Meter -Data wire to the E2 RS485 + terminal. The shield
cable should be connected to the right most terminal.

When the E2 is at one end of the daisy chain, terminate the E2 with all three jumpers in the terminated (UP)
position.

Wiring Connection to E2 Wiring • 11

5 Display Screen Diagram

5.1 LCD Screen

Figure 5-1 - Energy Meter Screen

5.2 Buttons

Figure 5-2 - Energy Meter Buttons

12 • Energy Meter Installation and Operation Manual 026-1726 Rev 2

6 Network Setup and Commissioning

E2 PIB COM PORT ASSOCIATIONS

COM1

COM4

COM6

COM2

Serial Device
RS485 COM Port
(2 Connectors)

RS485 COM Card
(2 Connectors)

Serial Device
RS232 Port

POWER INTERFACE BOARD
(PIB)

E2 Modem/Expansion
COM Card Mounted
Above PIB

Plug-In
Modem
Card

COM3

E2 Enclosure (Right Side)

RS485

RS232

6.1 Set Up Network Ports

Before communicating to an Energy Meter, the port on the
E2 that has the cable connected to the Energy Meter must
be configured to use the Energy Meter.

1. Log in to the E2 with Level 4 access.

Figure 6-1

- Location of E2 COM Ports

Connecting an Energy Meter to an E2 requires the E2 to
be version 3.0 or above. Contact Emerson for upgrade
information if the controller is a version before 3.0.

An E2 has up to three COM ports that can be assigned for
MODBUS communication: COM2, an RS485 port on the
E2 power interface board, and COM4 and COM6, which
are optional ports requiring expansion cards.

COM ports can only be used for one function; in other
words, if COM2 is set up as the I/O network, you
cannot connect MODBUS devices to COM2. Ensure your
E2 is equipped with an RS485 COM Card (P/N 637-4890)
and configured in E2 General Services (731, Serial tab) to
enable COM4 or an E2 Expansion COM Card
(P/N 637-4871) to enable COM6.

Connect the MODBUS network cable to the
three-terminal connector on the COM port you wish to
assign as MODBUS. Reverse polarity of +/- on RS485
cable from E2 to device.

2. Press

( followed by 731 - General Controller

Info.

3. Press

c+3 to open the Serial tab of the General

Controller Info setup screens:

Figure 6-2 - Serial Communications Manager Screen

4. This screen will have a “Connection” field for all
COM ports on the E2. Highlight the COM port
connection field that will be used for MODBUS,
and press $ - LOOK UP. From the list of
network types, select MODBUS (1-3).

5. Four fields will become visible underneath the
COM port connection field, which pertain to the
way the device communicates:

6. Baud - Default setting is 19.2k. The baud rate
setting should be set to match the baud rate dip
switch settings of all Energy Meter devices. (All
devices connected to the same COM port should
be set to the same baud rate.)

Set Up Network Ports Network Setup and Commissioning • 13

• Data Size - Leave this field at the default value (8).

• Parity - Leave this field at the default value (None).
The parity settings should be set to match the parity
dip switch settings of all Energy Meter devices.
Refer to Table 2.

• Stop Bits - Leave this field at the default value (1).

7. Press ) to save changes and exit.

6.2 Adding an Energy
Meter

To enable communications between E2 and the Energy
Meter units, the devices must be added and addressed in
E2.

1. Log in to the E2 with Level 4 access.

2. Press

(772 - Connected I/O Boards and

Controllers.

6.

Figure 6-4 - Network Summary Screen

7. By default, each Energy Meter’s board number in
the network list is indicated by a - (dash). To set

the address and begin communication, press
Commission. (If you have more than one
MODBUS network, specify which network you
want the device to belong to.) A screen will open
that will allow you set the address:

$ to

Figure 6-3

14 • Energy Meter Installation and Operation Manual 026-1726 Rev 2

- Connected I/O Screen

3. In the Connected I/O screen, under the ECT tab,
Enter the number of devices in the Energy Meter
number field.

4. Press

5. Locate the Energy Meter units you added to the

) to return to the Network Setup menu, then

select

1 - Network Summary.

network list (press
list). The default name for an Energy Meter

increments up starting with Energy001. The two
and three-letter designator does not apply here.

k and j to scroll through the

Figure 6-5

- Set the Address of the Energy Meter

8. In the list of MODBUS devices, choose the
address number corresponding to the Energy

Meter’s dip switch/jumper setting, and press
select it. If a network ID has already been

selected, its name will be shown next to the
network ID in this list. If the network ID you are
trying to assign has already been used, you must
set the network ID dip switch/jumper on this
device to a different number that is not being
used.

e to

Figure 6-6

E2

MODBUS

device

#1 #3

REVERSE POLARITY
Energy Meter +Data to the E2 RS485 ­Energy Meter -Data to the E2 RS485 +

MODBUS

device

MODBUS

device

- List of MODBUS Devices

9. Repeat Steps 5 and 6 until each Energy Meter
device has been commissioned.

Figure 6-7 - Network Summary Screen

10. When finished, press ) to return to the Network

Setup menu, then press

1 - Network Summary

(Figure 6-4). Locate the Energy Meters you set
up, and look at each device’s status in the Status
field. You will see one of the following
messages:

11. Online - The Energy Meter is communicating
normally.

12. Offline - The Energy Meter is not
communicating, has not been commissioned, is
not functional, or is not powered up. Verify the
Energy Meter is powered up, wired correctly, and
has the proper network
address, baud rate, and parity.

13. Unknown - The Energy Meter is not
communicating or has not been commissioned.
Verify the Energy Meter is powered up, wired
correctly, and has the proper network address,
baud rate, and parity.

14. No Port - No port is set up in the E2 Serial
Configuration Manager to be a MODBUS port.

15. Wrong FW Rev - This message is likely caused
by the Energy Meter having a firmware version
older than the minimum revision required by E2
for
communication. Replace the Energy Meter with a
new controller that has the latest version of
firmware.

6.3 RS-485
Communications

6.3.1 Daisy-chaining Devices to
the Energy Meter

The RS-485 slave port allows the Energy Meter to be
connected in a daisy chain with up to 63 two-wire
devices. In this manual, communications link refers to
a chain of devices that are connected by a
communications cable.

Figure 6-8

NOTES:

- Energy Meter Daisy Chain

• The Energy Meter polarity markings are the inverse
of E2; connect the Energy Meter +Data wire to the
E2 RS485 - terminal and connect the Energy Meter

-Data wire to the E2 RS485 + terminal. The shield
cable should be connected to the right most
terminal.

• The terminal’s voltage and current ratings are
compliant with the requirements of the EIA RS-485
communications standard.

RS-485 Communications Network Setup and Commissioning • 15

• The RS-485 transceivers are ¼ unit load or less.

• RS-485+ has a 47 kOhm pull up to +5V, and RS-485- has a 47 kOhm pull down to Shield (RS-485 signal ground).

• Wire the RS-485 bus as a daisy chain from device to device, without any stubs. Use a 150 ohm termination resistor
at the end of the bus between the Energy Meter’s + and
termination block P/N 535-2711).

• Shield is not internally connected to Earth Ground.

• Connect Shield to Earth Ground somewhere on the RS-485 bus.

• When tightening terminals, ensure that the correct torque is applied: 0.37-0.44 ft·lb (0.5-0.6 N·m).

- terminals (not included, or use Emerson MODBUS

Figure 6-9

- Energy Meter Wiring

16 • Energy Meter Installation and Operation Manual 026-1726 Rev 2

7 Quick Setup Instructions

These instructions assume the meter is set to factory
defaults. If it has been previously configured, all
optional values should be checked.

1. Press the + or - button repeatedly until
SETUP screen appears.

2. to the PASWD screen.

3. through the digits. Use the + or - buttons
to select the password (the default is 00000). Exit
the screen to the right.

4. Use the + or - buttons to select the parameter
to configure ( - works best).

5. If the unit has an RS-485 interface, the first Setup
screen is S COM (set communications).

a. to the ADDR screen and through the

address digits. Use the + or - buttons to select
the Modbus address.

b. to the BAUD screen. Use the + or -

buttons to select the baud rate.

c. to the PAR screen. Use the + or -

buttons to select the parity.

d. back to the S COM screen.

6. - to the S CT (Set Current Transducer) screen.
If this unit does not have an RS-485 port, this will
be the first screen.

a. to the CT V screen. Use the + or -

buttons to select the voltage mode Current
Transducer output voltage.

9. - to the S V (Set System Voltage) screen.

a. to the VLL (or VLN if system is 1L-1n)

screen and through the digits. Use the + or ­buttons to select the Line to Line System Voltage.

b. back to the S V screen.

10. Use the to exit the setup screen and then
SETUP.

11. Check that the wrench is not displayed on the
LCD.

a. If the wrench is displayed, use the + or -

buttons to find the ALERT screen.

b. through the screens to see which alert is on.

For full setup instructions, see the configuration
instructions in Section 10, User Interface for Data

Configuration, Section 11, Alert/Reset Information, and
Section 12, User Interface for Setup.

b. to the CT SZ screen and through the digits.

Use the + or – buttons to select the CT size in
amps.

c. back to the S CT screen.

7. - to the S SYS (Set System) screen.

a. to the SYSTM screen. Use the + or -

buttons to select the System Type (see wiring
diagrams).

b. back to the S SYS screen.

8. (Optional) - to the S PT (Set Potential
Transformer) screen. If PTs are not used, then
skip this step.

a. to the RATIO screen and through the

digits. Use the + or – buttons to select the
Potential Transformer step down ratio.

b. back to the S PT screen.

RS-485 Communications Quick Setup Instructions • 17

8 Solid-State Pulse Output

The Energy Meter has one normally open (NO) KZ Form
A output and one normally closed (NC) KY solid-state
output. One is dedicated to energy (Wh), and the other to
Alarm. The Energy Meter also provides an additional NO
reactive energy (VARh) contact. See the Setup section for
configuration information.

Figure 8-2 - Setting Pulse Energy

8.2 Set Pulse Energy –
Wh/P

In Watt Hour (and VAR Hours, if present) per pulse.
When moving down to a smaller energy, the meter will not
allow the selection if it cannot find a pulse duration that

Figure 8-1

The solid state pulse outputs are rated for 24VAC/DC
max.

Maximum load current is 100mA at 25°C. Derate 0.56mA
per °C above 25°C.

* The over-current protective device must be rated for the
short circuit current at the connection point.

** All pulse outputs and communication circuits are only
intended to be connected to nonhazardous voltage circuits
(SELV or Class 2). Do not connect to hazardous voltages.

- Solid-State Pulse Output

8.1 Set Pulse

The System Type, CT size, PT Ratio and System Voltage
must all be configured before setting the Pulse Energy. If
any of these parameters are changed, the meter will hunt
for a new Pulse Duration, but will not change the Pulse
Energy. If it cannot find a solution, the meter will display
the wrench icon, show “ConF” in the ALARM -> PULSE
screen, and enable Energy pulse output configuration error
bit in the Modbus Diagnostic Alert Bitmap (if equipped).

will allow the pulse output to keep up with Theoretical
Maximum System Power. When moving up to a larger
energy, the meter will jump to the first value where it can
find a valid solution.

8.3 Minimum Duration
Time – Milliseconds
per Pulse (mS/P)

This read-only value is set by the meter to the slowest
duration (in mS per closure) that will keep up with the
Theoretical Maximum System Power. The open time is
greater than or equal to the closure time. The maximum
Pulses Per Second (PPS) is shown in yellow.

18 • Energy Meter Installation and Operation Manual 026-1726 Rev 2

8.4 MultiFlex I/O Board Pulse Limits - Standalone Version
Only

The MultiFlex board can read pulses at a maximum of 5HZ or 5PPS. The Energy Meter is capable of pulsing faster than
the 5PPS maximum that the MultiFlex board can read.

Pulses should be greater than 80mS in length at a maximum rate of 5HZ: Do not exceed 5PPS.

For Example:

• Values of 100, 250, or 500 will be read by the MultiFlex board.

• Values of 50, 25, or 10 will not be read by the MultiFlex board.

MultiFlex I/O Board Pulse Limits - Standalone Version Only Solid-State Pulse Output • 19

9 UI Menu Abbreviations

Main Menu

IEC IEEE Description

D D Demand

MAX M Maximum Demand

P W Present Real Power

Q VAR Present Reactive Power

S VA Present Apparent Power

A A Amps

UAB, UBC, UAC VAB, VBC, VAC Voltage Line to Line

V VLN Voltage Line to Neutral

PF PF Power Factor

U VLL Voltage Line to Line

HZ HZ Frequency

KSh KVAh Accumulated Apparent Energy

KQh KVARh Accumulated Reactive Energy

KPh KWh Accumulated Real Energy

PLOSS PLOSS Phase Loss

LOWPF LOWPF Low Power Factor Error

F ERR F ERR Frequency Error

I OVR I OVR Over Current

V OVR V OVR Over Voltage

PULSE PULSE kWh Pulse Output Overrun (configuration error)

_PHASE _PHASE Summary Data for 1, 2, or 3 active phases

ALERT ALERT Diagnostic Alert Status

INFO INFO Unit Information

MODEL MODEL Model Number

OS OS Operating System

RS RS Reset System

SN SN Serial Number

RESET RESET Reset Data

PASWD PASWD Enter Reset or Setup Password

ENERG ENERG Reset Energy Accumulators

DEMND DEMND Reset Demand Maximums

Table 9-1 - UI Abbreviations

20 • Energy Meter Installation and Operation Manual 026-1726 Rev 2

10 User Interface for Data Configuration

MultiFlex I/O Board Pulse Limits - Standalone Version Only User Interface for Data Configuration • 21

11 Alert/Reset Information

22 • Energy Meter Installation and Operation Manual 026-1726 Rev 2

12 User Interface for Setup

MultiFlex I/O Board Pulse Limits - Standalone Version Only User Interface for Setup • 23

24 • Energy Meter Installation and Operation Manual 026-1726 Rev 2

13 Energy Meter Standard MODBUS

Default Settings

Setting Value

Setup Password 00000 –

Reset Password 00000 –

System Type 40 (3 + N) Wye 130

CT Primary Ratio (if CTs are not included) 100A 131

CT Secondary Ratio 1V 132

PT Ratio 1:1 (none) 133

System Voltage 600 V LL 134

Max. Theoretical Power (Analog Output: full
scale (20mA or 5V))

Display Mode 1 (IEEE) 137

Phase Loss 10% of System Voltage (60V), 25% Phase to Phase Imbalance 142, 143

Pulse Energy 1kWh/pulse 144

Demand: number of sub-intervals per interval 1 (block mode) 149

Demand: sub-interval length 900 sec (15 min) 150

Modbus Address 001 –

Modbus Baud Rate 19200 baud –

Modbus Parity None –

Log Read Page 0 158

Logging Configuration Register 0 159

Log Register Pointer 1 1 (Real Energy MSR) 169

Log Register Pointer 2 2 (Real Energy LSR) 170

Log Register Pointer 3 29 (Reactive Energy MSR) 171

Log Register Pointer 4 30 (Reactive Energy LSR) 172

Log Register Pointer 5 37 (Real Demand) 173

Log Register Pointer 6 38 (Reactive Demand) 174

Log Register Pointer 7 39 (Apparent Demand) 175

Log Register Pointer 8 155 (Month/Day) 176

Log Register Pointer 9 156 (Year/Hour) 177

Log Register Pointer 10 157 (Minutes/Seconds) 178

104 kW 135

Modbus
Register

Table 13-1 -MODBUS Default Settings

MultiFlex I/O Board Pulse Limits - Standalone Version Only Energy Meter Standard MODBUS Default Settings • 25

14 Troubleshooting

Problem Cause Solution

The maintenance wrench icon
appears in the Energy Meter
display.

The display is blank after
applying control power to the
meter.

The data displayed is
inaccurate.

Cannot communicate with
Energy Meter from a remote
personal computer.

There is a problem with the inputs
to the Energy Meter.

The meter is not receiving
adequate power.

Incorrect setup values

Incorrect voltage inputs

Energy Meter is wired improperly.

Energy Meter address is incorrect.

Energy Meter baud rate is
incorrect.

Communications lines are
improperly connected.

See the Alert sub-menu or the Diagnostic Alert Modbus Register
146

Verify that the meter control power is receiving the required
voltage. Verify that the heart icon is blinking. Check the fuse.

Verify the values entered for Energy Meter setup parameters (CT
and PT ratings, system type, etc.). See the
Quick Setup Instructions section.

Check Energy Meter voltage input terminals to verify adequate
voltage.

Check all CTs and PTs to verify correct connection to the same
service, PT polarity, and adequate powering. See the Wiring
section for more information.

Verify that the meter is correctly addressed. See the
User Interface for Setup section.

Verify that the baud rate of the meter matches that of all other
devices on its communications link. See the
Quick Setup Instructions section.

Verify the Energy Meter communications connections
(see Network Setup and Commissioning).
Verify the terminating resistors are properly installed on both ends
of a chain of units. Units in the middle of a chain should not have
a terminator. Verify the shield ground is connected between all
units.

Table 14-1 - Troubleshooting

26 • Energy Meter Installation and Operation Manual 026-1726 Rev 2

Appendix of Compatible Current Transducers

Split Core Current Transducers

Part Number Inside Diameter Amperage

251-7010 0.75" 100 AMP

251-7020 1.25" 200 AMP

251-7021 0.75" 200 AMP

251-7030 1.25" 300 AMP

251-7040 2.00" 400 AMP

251-7080 2.00" 800 AMP

251-7120 2.00" 1200 AMP

251-1000 0.75" 5 AMP

251-1001 0.75" 15 AMP

251-1002 0.75" 30 AMP

251-1003 0.75" 50 AMP

251-1004 1.25" 70 AMP

251-1005 1.25" 100 AMP

251-1006 1.25" 150 AMP

251-1007 1.25" 250 AMP

251-1008 1.25" 300 AMP

251-1009 1.25" 400 AMP

Solid Core Current Transducers

Part Number Inside Diameter Amperage

251-1020 0.30" 5 AMP

251-1021 0.50" 15 AMP

251-1022 0.50" 30 AMP

251-1023 0.75" 50 AMP

251-1024 0.75" 70 AMP

251-1025 1.00" 50 AMP

251-1026 1.00" 70 AMP

251-1027 1.00" 100 AMP

251-1028 1.00" 150 AMP

251-1029 1.00" 200 AMP

251-1030 1.25" 70 AMP

251-1031 1.25" 100 AMP

251-1032 1.25" 200 AMP

251-1033 1.25" 250 AMP

251-1034 1.25" 300 AMP

Table 14-2 - Compatible Transducers

MultiFlex I/O Board Pulse Limits - Standalone Version Only Appendix of Compatible Current Transducers • 27

For Technical Support call 833-409-7505 or email [e-mail]

The contents of this publication are presented for informational purposes only and they are not to be construed as warranties or guarantees, express or implied, regarding the products or
services described herein or their use or applicab ility. Emerson Climate Technologies Retail Solutions, Inc. and/or its affiliates (collectively “Emerson”), reserves the right to modify the designs or
specifications of such products at a ny time without notice. Emerson does not assume responsibility for the selection, use or maintenance of any prod uct. Responsibility for proper selection, use
and maintenance of any product remains solely with the purchaser and end-user.