Schneider Electric METSEEM4235 Power Logic Instruction Manual

Schneider Electric METSEEM4235 Power Logic

Product Information

The EM4200 Series Enercept FLEX TM is a compact power and energy meter that comes in various configurations including uni-directional, bi-directional, Modbus, and BACnet. It is designed to measure power and energy consumption. The meter supports features such as Modbus Point Map, BACnet Object List, and Configuration Tool. For additional documentation and resources, visit the website www.se.com.

The EM4200 Series Enercept FLEX TM is equipped with an RJ-45 connector, strain relief, and jumper for easy installation and connectivity.

Product Usage Instructions

1. Retain the installation sheet throughout the lifecycle of the product.
2. Ensure that a qualified person, who has the necessary skills and knowledge related to electrical equipment and installations, installs and operates the meter. This person should also have received safety training to recognize and avoid hazards.
3. Use the meter in a Pollution Degree 2 or better environment. This means controlling conductive pollution and preventing condensation or high humidity. Consider the enclosure, ventilation, thermal properties of the equipment and its relationship with the environment.
4. Follow the safety instructions provided on page 15 of the user manual to avoid risks of electric shock, explosion, or arc flash.
5. Do not use the meter in a manner not specified by the manufacturer, as it may impair the protection provided by the product.
6. The EM4200 Series Enercept FLEX TM has been tested and complies with class A digital standards according to FCC PART 15.
7. Refer to the dimensions diagram for physical measurements of the meter.
8. Choose the appropriate mounting method: DIN rail mount or screw mount, as per your installation requirements.
9. Do not install the meter on the load side of a Variable Frequency Drive (VFD).
10. Follow the CT installation instructions provided in the user manual.
11. Ensure proper wiring for load connections using the specified wire gauge (18 – 12 AWG).
12. The meter does not include fuses. The installer is responsible for ensuring compliance with local requirements and providing appropriate fuses.

Retain this installation sheet throughout the lifecycle of the product.

EM4200 Series compact power and energy meters (uni-directional, bi- directional, Modbus and BACnet). To download the Modbus Point Map, BACnet Object List, Configuration Tool and additional documentation, visit www.se.com.

What’s In The Box

RS-485 connector, strain relief multi-tool, 100Ω terminating resistor.

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 product for life or safety applications.
• 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.
• The 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 depend on this product for voltage indication.
• Products rated only for basic insulation must be installed on insulated conductors.
• Replace all doors, covers, and protective devices before powering the equipment.
• The installer is responsible for conformance to all applicable codes.

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

A qualified person is one who has skills and knowledge related to the construction and operation of this electrical equipment and installations and has received safety training to recognize and avoid the hazards involved. NEC Article 100
If this product is used in a manner not specified by the manufacturer, the protection provided by the product may be impaired. No responsibility is assumed by the manufacturer for any consequences arising out of the use of this material. 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.

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, the thermal properties of the equipment, and the relationship with the environment.

FCC PART 15 INFORMATION

NOTE:
This equipment has been tested by the manufacturer 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. Modifications to this product without the express authorization of the manufacturer nullify this statement.

Dimensions

in. (mm)

Mounting

DIN rail mount

Strap Tunnel

Screw mount

Wiring

Do not install on the load side of a Variable Frequency Drive (VFD).

CT Installation

• The arrow label on the CT must always point toward the load, as shown in the diagram below.
• Make sure to correctly associate CTs with voltage inputs.
• To avoid unwanted energy accumulation, short unused CT inputs or, on communicating models, configure the correct system type to disable unused inputs.
• Insert the optional strain relief tool into the two-hole opening above the RS-485 connector. Both CT and communications wires may be zip-tied to the tool for additional wire strain relief.

The following symbols are used in the diagram on the next page.

Voltage disconnect switch| Fuse

Note: The installer is responsible for ensuring compliance with local requirements. No fuses are included with the meter.

| Current transducer| Potential transformer| Winding| 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.
---|---|---|---|---|---
| | | | |

System Types

Install fuses, disconnect devices, and power connections as shown in the diagram. Select the section applicable to your meter from the column at left.

Notes:
Neutral (N) may be clipped and capped if not needed. Meter control power is derived from voltage between phases L1 and L2. The meter will not operate using phases L1 and N only. Fuse kits: EMFP1, EMFP2, EMFP3 (ANSI applications only).

I/Os

RS-485

Protocols| Baud rates| Parity|
---|---|---|---
Modbus RTU BACnet MS| 9600, 19200, 38400, 57600, 78600, 115200| None, Odd, Even|

The meter listens on the RS-485 bus to determine the baud rate, parity, and protocol and then configures itself to match (auto-baud and auto-protocol). This typically takes a dozen packet receptions. When the meter is listening to determine the baud rate and protocol, the Rx LED will flash yellow. If the meter is power-cycled when the meter has been communicating in Modbus RTU mode, it will remember the baud rate, parity, and Modbus protocol when power is restored. If the meter is power-cycled when communicating in BACnet MS/TP mode, it will come up in listen mode. If the meter sees numerous CRC or framing errors, it will return to the listening mode (Rx LED flashing yellow).

User Interface

Initial Setup

1. Use the CT Amperage rotary switch to select the rating (in amps) of the ⅓-volt CTs or the CTR Rogowski rope-style CTs to be attached to the meter. If the correct size is not on the list, use the next higher value, or a precise value may be configured over the communications port (if equipped).
2. Use the Address rotary switches to configure the meter to an address in the range of 1 to 99 for Modbus or 0 to 99 for BACnet (MAC) that is unique on the bus. The left rotary is the most significant digit, and the right is the least significant.
3. Insert the long end of the strain relief tool into the rotary pots and turn to the desired setting.

More Configuration Options
Download the configuration tool or configure using the Modbus Point Map and BACnet Object List. Available at www.se.com.

Meter Status|  |

|  Meter has received a communication error (typically bad CRC or framing error).|
---|---|---|---|---
Normal operation.
 Error condition.
| Meter has received a valid frame.|  |
Firmware download mode.
 | The meter is transmitting.|  |
Settings Override
The meter operating normally; parameters set on the front panel.
Phase Status|  |
Phase Blink Count|  |
 The number of blinks between pauses indicates the Power Factor in tenths. A blink count of 7 would be a Power Factor of approximately 0.70 (in the range of 0.65 and 0.75).|  |
One or more of the user interface controls (rotary dials) on the meter has been overridden though Communications. Rotary dials on the front of the meter are no longer accurate.  Uno o más de los controles de la interfaz del usuario (mandos giratorios) en el medidor han sido anulados a través de Comunicaciones. Los mandos giratorios del frente del medidor ya no son precisos.
Phase Color|  |
| Power factor greater than 0.70.|  |
Communications Status| |

Power factor less than 0.70 but greater than 0.50.

|
Meter is in autobaud mode and has not yet locked onto a baud rate, parity and protocol.
|  Power factor less than 0.50.|  |

Phase Blink Length1, 2

Phase Blink Length1, 2

Blink ¾ second| Power is being imported (i.e., taken from the grid).
Blink ¼ second| Power is being exported (i.e., sent to the grid).

1. Bi-directional applications only.
2. The length of a blink can also indicate that a CT has been installed incorrectly. If two phases have a long blink and one phase has a short blink and power is being pulled from the grid, this indicates that a CT on the phase with the short blink is likely installed backward.

Specifications

MEASUREMENT ACCURACY1

• Real Power and Energy, 1/3 Volt Current Input Mode: IEC 62053-22 Class 0.2S, ANSI C12.20, 0.2%
• Real Power and Energy, Rogowski Current Input Mode: IEC 62053-22 Class 0.5S, ANSI C12.20, 0.5%
• Reactive Power and Energy: IEC 62053-24 Class 1, 1%

INPUT VOLTAGE CHARACTERISTICS

• Measured AC Voltage: Min. 90 VL-N
  • (156 VL-L) for stated accuracy;
  • UL max.: 480 VL-L (277 VL-N); CE max.: 300 VL-N
• Impedance: 2.5 MΩL-N / 5 MΩL-L
• Frequency Range: 45…65 Hz

INPUT VOLTAGE CHARACTERISTICS

• Measurement Range: 0…0.333 Vac (+20% over-range)
• Impedance: 33 kΩ

CONTROL POWER

• AC: Drawn from phase A-B line-to-line voltage input; 4 VA max.: 90 VL-N min.; UL max.: 480 VL-L (277 VL-N); CE max.: 300 VL-N
• Ride-through Time: 50 ms at 120 Vac

MECHANICAL CHARACTERISTICS

• Ingress Protection (IEC 60529): IP20
• Plug Wire Size (I/O, Communications, CT): 24 to 16 AWG (0.2 to 1.5 mm2)
• Optional Bracket: Rail Mounted: T35 (35 mm) DIN rail per EN 50022
• Optional Bracket: Wall Mounted: Two #10 or M5 screws, 2.953” (75mm) center-to-center

ENVIRONMENTAL CONDITIONS

• Operating Temperature: -30…70 °C (-22…158 °F)
• Storage Temperature: -40…85 °C (-40…185 °F)
• Humidity Range: <95% RH (non-condensing)
• Altitude of Operation: 3 km max.
• Pollution Degree: 2
• Mounting Location: Not suitable for wet locations. For indoor use only.

METERING CATEGORY

• UL: CAT III; for distribution systems up to 277 VL-N / 480 VacL-L
• CE: CAT III; for distribution systems up to 300 VL-N
• Dielectric Withstand: Per UL 61010-1, IEC 61010-1
• Conducted and Radiated Emissions: FCC part 15 Class A, EN 61000-6-4, EN 61326-1 Class A (industrial)
• Conducted and Radiated Immunity: EN 61000-6-2, EN 61326-1 (industrial)

AGENCY APPROVALS

• US and Canada (cULus): UL 61010-1
• Europe (CE): IEC 61010-1

The meters were tested compliant to the norms:

• ANSI C12.20, Class 0.2, from 1% to 100% rated current
• IEC 62053-22, Class 0.2S, from 1% to 100% rated current
• IEC 62053-22, Class 0.5S for Rogowski coils, from 1% to 100% rated current
• IEC 62053-24 Class 1, from 1% to 100% rated current

Troubleshooting

meter has the required voltage between phase A and B voltage inputs.

Verify the Status LED is blinking green. Check the fusing.

Data returned from the meter is inaccurate.| Incorrect setup values.| Verify that the CT size entered on the CT Amps rotary control is correct.

On communicating meters, check the power meter setup parameters (CT and PT ratings, system type, etc.). See the Configuration Tool, Modbus Point Map or BACnet Objects List.

Incorrect voltage inputs| Check power meter voltage input terminals to verify adequate voltage and correct phase connections.
Power meter is wired improperly.| Check all CTs and PTs to verify correct connection to the same service, PT polarity, and adequate

powering.

Check that the CT and voltage inputs are properly associated (Phase A voltage is connected to the Phase A CT, etc.).

See the Wiring section for more information.

Cannot communicate with power meter from a remote computer.| Power meter address is incorrect.| Verify that the meter is correctly addressed on the address rotary controls (see the Wiring section for more information).
Baud rate is not supported.| Verify that the baud rate used on the bus is supported by the meter (see “RS-485” on page 7). If the meter cannot determine which baud rate is being used, it will stay in auto-baud mode, blinking amber on the Rx LED.
Protocol is not supported.| Verify that the protocol used on the bus is supported by the meter (see “User Interface” on page 8).

The meter supports Modbus and BACnet MS/TP protocol.

Communications lines are improperly connected.| Verify the power meter communications connections (see “RS-485” on page 7).

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 biasing resistors are installed on a single place on the bus. Verify the shield ground is connected between all units.

Verify the shield ground is connected to earth at a single point on the bus.

Incorrect CT polarity (bi-directional applications only)| CT orientation is not correctly installed toward the load.| The user sets bits to invert the polarity of individual CT inputs (see Modbus register 4174). Inverting the CT polarity changes the sign (direction of energy flow) of real (active) power (in watts) reported for that phase in the bi-directional data set. It will also change the lead or lag indication reported by the sign of reactive power (VAR) in the bi-directional data set.
Incorrect voltage to

CT orientation

| The phase CT is not on the same wire that is connected to the voltage input for that phase. The reported real (active) power will be inaccurately low and the reactive

power high, resulting in a low Power Factor warning or alarm (see LED section and Error Bitmap Modbus register 4196).

| The CT inputs may be re-assigned to different phases (see Modbus registers 4175 to 4177).

Both the power and energy calculations in the uni- and bi-directional data sets will be rendered inaccurate by incorrect voltage-to-CT association. Note that the order of the phases does not affect the total energy calculated for the circuit, so it is not necessary to fix phase order, just voltage-to-CT association to obtain a correct power and energy calculation.

China RoHS Compliance Information

Hazardous Substances

Part Name| lead(Pb)| (Hg)| Cadmium(Cd)| Hexavalent chromium (Cr (VI))| polybrominated biphenyls (PBB)| Polybrominated diphenyl ethers (PBDE)
Electronic Copy

Electronic

| X| O| O| O| O| O

This table is made according to SJ/T 11364.

• O: indicates that the concentration of hazardous substances in all of the homogeneous materials for this part is below the limit as stipulated in GB/T 26572.
• X: indicates that the concentration of a hazardous substance in at least one of the homogeneous materials used for this part is above the limit as stipulated in GB/T 26572.

Safety Instructions

Read these instructions carefully and look at the equipment to become familiar with the device before trying to install, operate, service, or maintain it. The following special messages may appear throughout this bulletin or on the equipment to warn of potential hazards or to call attention to information that clarifies or simplifies a procedure.

• The addition of either symbol to a “Danger” or “Warning” safety label indicates that an electrical hazard exists which will result in personal injury if the instructions are not followed.
• This is the safety alert symbol. It is used to alert you to potential personal injury hazards. Obey all safety messages that follow this symbol to avoid possible injury or death.

DANGER
DANGER indicates an imminently hazardous situation that, if not avoided, will result in death or serious injury.

Schneider Electric Limited

• Stafford Park 5 Telford TF3 3BL United Kingdom.
• Schneider Electric 35, rue Joseph Monier CS 30323
• F – 92506 Rueil Malmaison Cedex www.se.com.

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References

• Schneider Electric Global | Global Specialist in Energy Management and Automation

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