FREESCALE MCF51EM256_1

Freescale Semiconductor
Reference Design Data Sheet
MCF51EM256110RDDS
Rev. 0, 10/2009
MCF51EM256-based Poly Phase
Energy Meter Reference Design
110V Technical Specifications
Electrical
Connection type
Direct connected (whole current)
Wiring configuration
3 phase 4 wire, 1 phase 3 wire & 1 phase 2 wire
Voltage rating
120 V +/-20% (L-N)
Current range
15-100 A
Accuracy
Class 0.5
Frequency range
57 Hz to 63 Hz
Pulse constant
800 impulses/kWh & 800 impulses/kVArh
Standard compliance
IEC 62053-11, IEC 62053-22, IEC 62053-23 & IEC62056-21
© Freescale Semiconductor, Inc., 2009. All rights reserved.
Mechanical
Dimensions (WxHxD)
168 x 242 x 84 mm
Weight
1.745kg
Enclosure
Plastic (PC/ABS blends)
Sealing
Sealing screws provision
Environmental
Compliance
IEC 60529
Ingress protection
IP 51 (Indoor type meter)
Operating Temperature
-25˚C to +55˚C
Storage Temperature
-25˚C to +70˚C
Humidity
95%
Features
Measurement parameters
Voltage, Current, Frequency, kWh import/export, kVArh
import/export/lead/lag, kW, kVAr, Power factor.
Tamper Recording
Logging of tampers with time stamp for Voltage Failure, Current
Failure, Voltage unbalance, Current Unbalance and Cover open.
LED indication for tamper
Tamper counter showing number tampers from last reset of counter.
Load profile
Load profile interval period: 5, 10, 15, 30, 60 minutes and 1 day.
Maximum demand
Programmable MD interval period of 30 minutes and 60 minutes
MD can be reset by using Reset key.
Display
Custom built metering specific LCD with backlight. Eight digits 7
segment display for parameters with symbol identifiers.
Auto scroll
Manual scroll using UP and DOWN keys
Communication
Optical port as per standard IEC 62056-21
RS 232 port for debug and BDM port for programming.
Data security
Data storage in non-volatile memory
2 Levels of password: for programming, configuration and for auto
calibration.
Output device
LED pulses proportional to kWh, kVArh
LED for Power on indication
MCF51EM256-based Poly Phase Energy Meter Reference Design 110V Technical Specification, Rev. 0
2
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© Freescale Semiconductor, Inc. 2009. All rights reserved.
MCF51EM256110RDDS
Rev. 0
10/2009