EM49xxx
EM49xxx Series multi-circuit meters. EM49xxA models are open-board
on mounting bracket with Modbus RTU protocol; EM49xxE models are
in a metal case with both Ethernet and serial protocols.
To download user manuals and other documentation, visit
www.schneider-electric.com.
Refer to the user guide when you see this icon.
EM49xxA
EM49xxE
1
EM4904A/08A/14A
EM4904E/08E/14E
A
A Ferrite / Ferrita / Ferrite / Ferrit / Феррит / 铁氧体
EM4928A
EM4928E
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A
B
A Ferrite / Ferrita / Ferrite / Ferrit / Феррит / 铁氧体
B Cable ties /
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Safety Precautions /
DANGER
HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH
• This product must be installed inside a suitable fire and electrical enclosure.
• 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.
• Do not use this device for critical control or protection applications where human
or equipment safety relies on the operation of the control circuit.
• Do not install this product in hazardous or classified locations.
• Read, understand and follow the instructions before installing this product.
• Turn off all power supplying equipment before working on or inside the
equipment.
• Product may use multiple voltage/power sources. Disconnect all sources before
servicing.
• Use a properly rated voltage sensing device to confirm that power is off.
• Do not use data from this device to confirm power is off.
• Replace all doors, covers and protective devices before powering the
equipment.
• Do not exceed the product's ratings or maximum limits.
• Treat communications and I/O wiring connected to multiple devices as
hazardous live until determined otherwise.
Failure to follow these instructions will result in death or serious injury.
If this product is used in a manner not specified by the manufacturer, the protection
provided by the product may be impaired.
The installer is responsible for conformance to all applicable codes.
The safety of any system incorporating this equipment is the responsibility of the
assembler of the system.
Note: See IEC 60950-1:2005, Annex W for more information on communications and
I/O wiring connected to multiple devices.
Protective bonding: electrical connection of accessible conductive parts or protective
screening to provide electrical continuity to the means for connection of an external
protective conductor.
Control system design must consider the potential failure modes of control paths and,
for certain critical control functions, provide a means to acheive a safe state during
and after a path failure. Examples of critical control functions are emergency stop and
over-travel stop.
WARNING
LOSS OF CONTROL
• Ensure that the system will reach a safe state during and after a control path
failure.
• Separate or redundant control paths must be provided for critical control functions.
• Test the effect of transmission delays or failures of communication links.
• Each implementation of equipment using communication links must be individually
and thoroughly tested for proper operation before placing it in service.
Failure to follow these instructions can result in injury, death or equipment
damage.
For additional information about anticipated transmission delays or failures of the
link, refer to NEMA ICS 1.1 (latest edition). Safety Guidelines for the Application,
Installation, and Maintenance of Solid-State Controls or its equivalent in your specific
country, language, and/or location.
Provide a disconnect device to disconnect the 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
overcurrent protection and disconnecting device for supply conductors with
approved current limiting devices suitable for protecting the wiring.
FCC PART 15 INFORMATION
EM49xxA Models: 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 and used in accordance with the instructions,
may cause harmful interference to radio communications. However, 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 to an outlet on a circuit different from that of the receiver.
– Consult the dealer or an experienced radio/TV technician for help.
The user is cautioned that any changes or modifications not expressly approved by
Schneider Electric could void the user’s authority to operate the equipment.
EM49xxE Models: This equipment has been tested and found to comply with the
limits for a Class A 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 commercial 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 is likely to cause
harmful interference in which case the user will be required to correct the
interference at his own expense.
CAN ICES-3 (B) /NMB-3(B)
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Safety Precautions /
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Safety Precautions /
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Dimensions /
EM49xxA
8.3”
(211 mm)
Data acquisition board and
mounting bracket. Mounting
hardware not included.
7.9”
(200 mm)
5.8”
(146 mm)
3.9”
(100 mm)
4.8”
(122 mm)
1.75”
(45 mm)
Ø = 0.2”
(5 mm)
7.3”
(184 mm)
1.74”
(44 mm)
8.9”
(226 mm)
EM49xxE
Housing and mounting
brackets. Mounting hardware
not included.
Dotted lines indicate dimensions if the two brackets are placed for
horizontal mounting. At the factory, the brackets are placed for vertical
mounting.
12.1”
(307 mm)
2x: 5.9”
(150 mm)
12.8”
(325 mm)
13.9”
(353 mm)
8.9”
(225 mm)
10.0”
(253 mm)
8.2”
(210 mm)
2.8”
(71 mm)
28-Meter CT Adapter Assembly /
CT adapter board and
mounting bracket. Mounting
hardware not included.
9.50”
(241 mm)
0.56” (14.3 mm)
1.60” (40.5 mm)
5.53” (140.5 mm)
6.56” (167 mm)
7.13” (181 mm)
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Mounting /
NOTICE
ESD-SENSITIVE DEVICES
Observe handling precautions for static sensitive devices.
Failure to follow this instruction can result in damaged circuitry and loss of
factory warranty.
DANGER
HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH
• This product must be installed inside a suitable fire and electrical enclosure.
• 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.
• Do not use this device for critical control or protection applications where human
or equipment safety relies on the operation of the control circuit.
• Do not install this product in hazardous or classified locations.
• Read, understand and follow the instructions before installing this product.
• Turn off all power supplying equipment before working on or inside the
equipment.
• Product may use multiple voltage/power sources. Disconnect ALL sources
before servicing.
• Use a properly rated voltage sensing device to confirm that power is off.
• Replace all doors, covers and protective devices before powering the
equipment.
• Do not exceed the product's ratings or maximum limits.
• Treat communications and I/O wiring connected to multiple devices as
hazardous live until determined otherwise.
• Use the protective ground connection on the mounting bracket if the device is
not mounted to a suitable ground surface.
Failure to follow these instructions will result in death or serious injury.
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Mounting /
Install main board in breaker panel
if there is room. If not, install in a
separate enclosure. /
Panel 1
Panel 2
Ground /
EM49xxA
5
Wiring /
EM4828A & EM4828E: Connect CT
adapter board to main unit using ribbon
cables provided. /
28 Meter CT Adapter /
EM4928A
EM4928E
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Wiring /
Cable ties are provided for strain relief,
if desired. /
A
B
DANGER
HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH
• While removing or installing panels and covers, ensure that they do not contact
an energized bus.
• NEVER bypass external fusing.
• NEVER short the secondary of a potential transformer.
• Before closing covers and doors, carefully inspect the work area and remove
any tools, wire scraps or other objects that may
have been left inside the equipment.
• Do not exceed the product’s ratings or maximum limits.
• Turn off all power supply equipment before working on or inside equipment.
• Use a properly rated voltage sensing device to cofirm that power is off.
• Treat all measurement circuits and CT connections as energized live.
Failure to follow these instructions will result in death or serious injury.
NOTICE
ESD-SENSITIVE DEVICES
Observe handling precautions for static sensitive devices.
Failure to follow this instruction can result in damaged circuitry and loss of
factory warranty.
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Wiring /
Connecting CT Wires to the Terminals /
For black wires (x2) /
X2
Button /
Wire receptacle /
For white wires (x1) /
X1
CT connections for Meter 1 /
9 mm
Strip wire /
Voltage Connections /
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Wiring /
EM49xxA
EM49xxE
V2/N
90 to 277 Vac
V1/L
Control Power /
Voltage Inputs /
V1
V2
V3
Control Power /
N
Voltage Inputs /
N
L-L
V3
V2
V1
V1
V2/N
V1
V2/N
L-N
L-N
L-L
For voltage inputs V1-V3: L-L voltage: 150 to 480 Vac, nominal,
L-N voltage: 90 to 300 Vac. Voltage taps are shared by poth panels.
Voltage Wiring Configurations /
V3
V3
V3
V3
V2
N
N
N
V2
N
V1
120V/240V Delta High Leg /
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V2
V1
X
3-Wire (Ungrounded) Delta /
V2
V1
Corner-Grounded Delta /
V2
V1
4-Wire Wye /
V1
3-Wire Split Phase /
V1
N
2-Wire Single Phase /
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Wiring /
Connecting RS-485 /
EM49xxA
EM49xxE
SHIELD
S
–
RX- TX-
+
RS-485
S
–
+
RX+ TX+
TXTX+
EM49xxA 2-Wire Configuration /
TX+
TX+ TXTX– RX+ RX- SHLD
SHIELD
SHIELD
See user manual for 4-wire configurations /
RS-485
RS-485 cable /
120 Ω terminator at each end
of daisy chain /
S
–
+
RS-485
S
RS-485 cable /
120 Ω terminator at each end
of daisy chain /
–
+
–
+
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User Interface /
DANGER
HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH
• Turn off all power supply equipment before working on or inside equipment.
• Use a properly rated voltage sensing device to cofirm that power is off.
Failure to follow these instructions will result in death or serious injury.
NOTICE
ESD-SENSITIVE DEVICES
• Observe handling precautions for static sensitive devices.
Failure to follow this instruction can result in damaged circuitry and loss of
factory warranty.
Communications Setup
EM49xxA: Configure communication
and addressing parameters using DIP
switches.
Z207386-0A
LED Blink Codes for EM49xxA /
Green, once per second /
Normal operation /
Amber, once per second /
Volts or amps clipping /
Amber, twice per second /
Invalid firmware image /
Red, solid or blink /
Diagnostic event detected /
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User Interface /
Example: 2-wire 19200 Baud No Parity /
Address switch examples /
0
1
2
3
4
5
6
B0
B1
Off/On Parity
Odd/Even
Parity
2/4 wire
7
8
3
......
246
Reserved
Default Modbus address DIP switch settings /
LSB
2
Switch settings /
1
=
1
2
3
4
5
6
7
8
off
off
X
X
X
9600
on
off
X
X
X
19200
off
on
X
X
X
38400
on
on
X
X
X
Reserved /
off
off
X
X
X
No Parity /
on
off
X
X
X
Odd Parity /
off
on
X
X
X
No Parity /
on
on
X
X
X
Even Parity /
on
X
X
X
4-wire RS-485 /
off
X
X
X
2-wire RS-485 /
1
MSB
1
2
4
8
16
32
64
128
DIP Switch Values /
EM49xxE: To set the
communications parameters, use
the web GUI.
Meter Configuration
(EM49xxA, EM49xxE): Use ION
Setup software for configuration.
https://schneider-electric.box.com/
ionsetuplatest.
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Specifications /
VOLTAGE INPUTS
•Measurement Voltage: 90 to 300 Vac
line-to-neutral
•Control Power:
EM49xxA: 90 to 277 Vac line-to-neutral;
EM49xxE: 100 to 277 Vac line-toneutral
•Frequency: 50/60 Hz
ACCURACY
•Power/Energy: IEC 62053-21 Class
0.5, ANSI C12.20 class 0.5
•Voltage: ±0.5% of reading 90 to 277 V
line-to-neutral
•Current: ±0.5% of reading from 2% to
100% of full-scale
OPERATION
•Sampling Frequency: 2560 Hz
•Update Rate: 1.8 seconds (both
panels)
•Overload Capability: 22 kAIC
SERIAL COMMUNICATION
(EM49XXA)
•Type: Modbus RTU
•Connection: DIP switch selectable
2-wire or 4-wire, RS-485
•Address: DIP switch selectable
address 1 to 247 (in pairs of 2)1
•Baud Rate: DIP switch-selectable
9600, 19200, 38400
•Parity: DIP switch-selectable NONE,
ODD, EVEN
•Communication Format: 8 data bits,
1 start bit, 1 stop bit
•Termination: 5-position plug-in
connector
(TX+ TX- SHIELD TX+/RX+ TX-/RX-)
SERIAL COMMUNICATION (EM49XXE)
•Physical Interface: 2-wire RS-485
•Serial Protocols Supported: Modbus
RTU or BACnet MS/TP
•Address Range: 1 to 247 for Modbus
RTU; 0 to 127 for BACnet MS/TP
•Baud Rate: 9600, 19200, 38400
•Parity: Modbus RTU: NONE, ODD,
EVEN; BACnet MS/TP: NONE (fixed)
•Communication Format: 8 data bits,
1 start bit, 1 stop bit
•Termination: 2x3 position connector
ETHERNET COMMUNICATION
(EM49XXE)
•Physical Interface: RJ45 connector
with 10/100 Mbit Ethernet
•Protocols Supported: Modbus TCP,
BACnet IP, SNMP V2c
WIRE SIZE RANGE
•Removable Connectors on Main
Board: 24 to 12 AWG
•CT Terminals and EM49xxE Serial
Connector Terminals: 26 to 16 AWG
Z207386-0A
TERMINAL BLOCK TORQUE
•Removable Connectors: 4.4 to 5.3 in-lb
(0.5 to 0.6 N-m)
MECHANICAL
•Ribbon Cable Support (28-meter
models only): 4 ft. (0.9 m) round ribbon
cable ships standard; up to 20 ft. (6 m)
flat or round available
OPERATING CONDITIONS
•Operating Temperature Range:
0 to 60 °C (32 to 140 °F)
(<95% RH non-condensing)
•Storage Temperature Range:
-40 to 70 °C (-40 to 158 °F)
•Altitude of Operation: 3000 m
•Mounting Location: Not suitable for wet
locations. For indoor use only.
COMPLIANCE INFORMATION
•Agency Approvals: UL508 open type
device2, IEC/EN61010-1
•Installation Category3: Cat III, Pollution
Degree 2
•Conducted Emissions: EM49xxA
Models: FCC part 15 Class B,
EN61000-6-3, EN61326-1 Class B
(residential and light industrial)
•Radiated Emissions: EM49xxE Models:
FCC part 15 Class A, EN6100-6-4,
EN61326-1 Class A
•Conducted and Radiated Immunity:
EN 61000-6-2 and EN 61326-1
1. See Configuration section for details.
2. The EM49xxx must be installed in an
appropriate electrical and fire enclosure per local
regulations. If EM49xxx products are used in
installations with circuits higher than the product
ratings, the circuits must be kept segregated
per UL508A Sec. 17.5. Note: EM49xxx internal
circuitry (cables and CTs) are not circuits as
defined by UL508A, as they do not extend beyond
the EM49xxx itself without further safety/fire
isolation.
3. A Pollution Degree 2 environment must
control conductive pollution and the possibility
of condensation or high humidity. Consideration
must be given to the enclosure, the correct use of
ventilation, thermal properties of the equipment
and the relationship with the environment.
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Specifications /
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Specifications /
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China RoHS Compliance Information /
部件名称
Part Name
电子件
Electronic
铅 (Pb)
汞 (Hg)
X
O
有害物质 - Hazardous Substances
镉 (Cd)
六价铬 (Cr (VI))
多溴联苯 (PBB)
O
O
O
多溴二苯醚 (PBDE)
O
本表格依据SJ/T11364的规定编制。
O: 表示该有害物质在该部件所有均质材料中的含量均在GB/T 26572规定的限量要求以下。
X: 表示该有害物质至少在该部件的某一均质材料中的含量超出 GB/T 26572规定的限量要求。
(企业可在此处,根据实际情况对上表中打 的技术原因进行进一步说明。)
This table is made according to SJ/T 11364.
O: indicates that the concentration of hazardous substance in all of the homogeneous materials for this part is below
the limit as stipulated in GB/T 26572.
X: indicates that concentration of hazardous substance in at least one of the homogeneous materials used for this part
is above the limit as stipulated in GB/T 26572
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9
Notices /
Read these instructions carefully and look at the equipment to become familiar with
the device before trying to install, operate, service or maintain it.
Electrical equipment should be installed, operated, serviced and maintained only
by qualified personnel. No responsibility is assumed by Schneider Electric for any
consequences arising out of the use of this material. A qualified person is one who
has skills and knowledge related to the construction, installation, and operation of
electrical equipment and has received safety training to recognize and avoid the
hazards involved.
PowerLogic and Schneider Electric are trademarks or registered trademarks of
Schneider Electric in France, the USA and other countries.
•This product must be installed, connected and used in compliance with prevailing
standards and/or installation regulations.
•If this product is used in a manner not specified by the manufacturer, the protection
provided by the product may be impaired.
•The safety of any system incorporating this product is the responsibility of the
assembler/installer of the system.
As standards, specifications and designs change from time to time, always ask for
confirmation of the information given in this publication.
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Notices /
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PowerLogic and Schneider Electric are trademarks or registered trademarks of
Schneider Electric in France, the USA and other countries.
•This product must be installed, connected and used in compliance with prevailing
standards and/or installation regulations.
•If this product is used in a manner not specified by the manufacturer, the protection
provided by the product may be impaired.
•The safety of any system incorporating this product is the responsibility of the
assembler/installer of the system.
As standards, specifications and designs change from time to time, always ask for
confirmation of the information given in this publication.
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Schneider Electric
35, rue Joseph Monier
CS 30323
F - 92506 Rueil Malmaison Cedex
www.schneider-electric.com
Z207386-0A
© Copyright 2017 Schneider Electric. All rights reserved.
0717
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