Main Documents
Description
PMC-D721MD DC Multifunction Meter
Device Introduction
- The PMC-D721MD DC Multifunction Meter is CET’s latest offer for the low-cost DC metering market. Housed in an industry standard DIN form factor measuring 72x72x71.8mm, it is perfectly suited for industrial, commercial and utility DC metering applications.
- The PMC-D721MD complies with Class 0.5 kWh Accuracy Standard and features quality construction, multifunction measurements and a bright, easy to read LCD display. The PMC-D721MD comes standard with two Front Panel LED indicators for Energy Pulsing and Communication. It provides two Digital Inputs for status monitoring and two Solid State Pulse Outputs for kWh Energy Pulsing applications. The standard SOE Log records meter events such as power-off, setup changes and DI operations in 1ms resolution. With a standard RS-485 port and Modbus protocol support, the PMC-D721MD becomes a vital component of an intelligent, multifunction monitoring solution for any DC Power and Energy Management systems.
Product Highlight
- Low-Cost DC Multifunction Meter
- Class 0.5 kWh Compliant
- DIN72 (68x68mm Cutout)
- Backlit B&W LCD Display
- DC V&I, kW and Event Log
- Modbus RTU
- 1xRS-485
- 2xDI, 2xSS Pulse Output
Typical Application
- Industrial, Commercial and Utility Substation Metering
- Building, Factory and Process Automation
- Sub-metering and Cost Allocation
- Energy Management and Power Quality Monitoring
Related Products
PMC-53A Intelligent Multifunction Meter
PMC-53A-E Ethernet Multifunction Meter
PMC-53M-A Digital Multifunction Meter
PMC-D726M Digital Multifunction Meter
PMC-S963-C Intelligent Multifunction Meter
PMC-S963-E Intelligent Multifunction Meter
Specification
Technical Specification
Voltage Inputs | |
|---|---|
| Standard Un | 1000V DC |
| Measurement Range | 1% to 120% Un |
| Starting Voltage | 10V DC |
| Overload | 1.2xUn continuous, 2xUn for 1s |
| Measurement Category | CAT III up to 600ULL |
Current Inputs | |
| Nominal Input (In) | 100mV DC (via Shunt Output), configurable for Shunts rated at 50,60,75 and 100mV |
| Measurement Range | 1% to 120% In |
| Starting Current | 0.2% of In |
| Max.Shunt Current | 10,000A |
| Overload | 1.2xIn continuous, 10xIn for 10s, 20xIn for 1s |
Power Supply(L+,N-) | |
| In | 5A(5A/1A Auto-Scale) |
| Range | 0.1% to 200% In |
| Starting Current | 0.1% In |
Power Supply(L+,N-) | |
| Standard | 95-250VAC/DC,±10%,47-440Hz |
| Optional | 20-60VDC |
| Burden | <2W |
| Overvoltage Category | CAT III up to 300VLN |
Digital Inputs(DI1,DI2,DI3,DI4,DIC) | |
| Type | Dry contact,24VDC internally wetted |
| Sampling | 1000Hz |
| Hysteresis | 1ms minimum |
Digital Outputs(DO11,DO12,DO21,DO22) | |
| Type | Form A Mechanical Relay |
| Loading | 5A@250VAC or 30VDC |
| Load Type | Resistive |
Pulse Outputs(E1+,E1-,E2+,E2-) | |
| Type | Form A Solid State Relay |
| Isolation | Optical |
| Load Type | Resistive |
| Output | Optocoupler output as ON-OFF |
| Max.Load Voltage | 50VDC |
| Max.Forward Current | 50mA |
Installation Torque | |
| Current Inputs | 12 Ib-in(1.3N.m) |
| Power Supply,Voltage Inputs,RS-485 and I/O | 5 Ib-in(0.5N.m) |
Environmental Conditions | |
| Operating Temp. | -25 °C to + 70°C |
| Storage Temp. | -40 °C to + 85°C |
| Humidity | 5% to 95% non-condensing |
| Atmospheric Pressure | 70 kPa to 106 kPa |
| Altitude | <2000m |
| Location/Mounting | For indoor use only |
Mechanical Characteristics | |
| Panel Cutout | 92x92mm(3.62”x3.62”) |
| Unit Dimensions | 96x96x88mm |
| IP Rating | IP65 |
Communications | |
| Protocol | Modbus RTU, BACnet MS/TP, Metasys N2 and DNP3.0 |
| RS-485 Port | 1+(1 Opt.) |
Features Summary | |
| Display (Backlit) | Dot-Matrix LCD (Backlit) |
| Type of Measurement | ULN per Phase &Avg. ULL per Phase&Avg. Current per Phase &Avg. Neutral Current (Meas./Calc.) Frequency kW per Phase & Total kvar per Phase & Total kVA per Phase& Total PF per Phase& Total kWh lmport/Export kvarh Import/Export kVAh Total |
| Power Quality | THD Voltage & Current TOHD Voltage & Current TEHD Voltage & Current 2nd-31st Harmonics K-Factor Voltage/Current Unbalance |
| Battery-backed Real-time Clock | √ |
| Demands | Present , Predicted Demands and Max.Demands for This Month & Last Month |
| Multi-Tariff TOU capability | Two TOU schedules, each providing: 12 Seasons 90 Holidays 20 Daily Profiles, each with 12 Periods in 15-minute interval 8 Tariffs |
| Diagnostics | √ |
| Setpoints | 9 Setpoints |
Logs | |
| Max./Min.Log | This month & Last Month |
| Freeze Logs(Optional) | 60 Daily Freeze Logs, 36 Monthly Freeze Logs |
| Data Recorder(Optional) | 5 Data Recorders Max. Recording Depth @ 10000 records |
| SOE Log | 100 entries |
| On-board Log Memory | (4MB Opt.) |
Accuracy
| Parameters | Accuracy | Resolution |
|---|---|---|
| Voltage | ±0.2% | 0.001V |
| Current | ±0.2% | 0.001A |
| I4(measurement) | ±0.2% | 0.001A |
| P,Q,S | ±0.5% | 0.001kx |
| kWh,kVAh | IEC 62053-22 Class 0.5S ANSI C12.20 Class 0.2 EN 50470-1/3:2006 Class C | 0.1kXh |
| kvarh | IEC 62053-24 Class 0.5S IEC 62053-23 Class 2 | 0.1kvarh |
| PF | ±0.5% | 0.001 |
| Frequency | ±0.02Hz | 0.01Hz |
| THD | IEC 61000-4-7 Class B | 0.001% |
| K-Factor | IEC 61000-4-7 Class B | 0.001 |
| Phase Angle | ±1° | 0.1° |
Standards of Compliance
Safety Requirements | |
|---|---|
| CE LVD 2014/35/EU | EN 61010-1: 2010 EN 61010-2-030: 2010 |
| Electrical Safety in Low Voltage Distribution Systems up to 1000Vac and 1500Vdc | IEC 61557-12:2018(PMD) |
| Insulation AC Voltage: 2kV@1 minute Insulation Resistance: >100MΩ Impulse Voltage: 6kV,1.2/50µs | IEC 62052-31:2015 |
Electromagnetic Compatibility CE EMC Directive 2014/30/EU(EN 61326:2013) | |
Immunity Tests | |
| Electrostatic Discharge | EN 61000-4-2:2009 |
| Radiated Fields | EN 61000-4-3:2006+A1:2008+A2:2010 |
| Fast Transients | EN 61000-4-4:2012 |
| Surges | EN 61000-4-5:2014+A1:2017 |
| Conducted Disturbances | EN 61000-4-6:2014 |
| Magnetic Fields | EN 61000-4-8:2010 |
| Voltage Dips and Interruptions | EN 61000-4-11:2004+A1:2017 |
| Ring Waves | EN 61000-4-12:2017 |
Emission Tests | |
| Limits and Methods of Measurement of Electromagnetic Disturbance Characteristics of Industrial,Scientific and Medical(ISM) Radio-Frequency Equipment | EN 55011:2016 |
| Limits and Methods of measurement of Radio Disturbance Characteristics of Information Technology Equipment | EN 55032:2015 |
| Limits for Harmonic Current Emissions for Equipment with Rated Current≤16A | EN 61000-3-2:2014 |
| Limitation of Voltage Fluctuations and Flicker in Low-Voltage Supply Systems for Equipment with Rated Current≤16A | EN 61000-3-3:2013 |
| Emission Standard for Residential, Commercial and Light-Industrial Environments | EN 61000-6-4:2007+A1:2011 |
RED (Radio Equipment Directive) | |
| Assessment of Electronic and Electrical Equipment Related to Human Exposure Restrictions for Electromagnetic Fields (0Hz - 300 GHz) | EN/IEC 62311: 2020 |
| Short Range Devices (SRD) Operating in the Frequency Range 25 MHz to 1000MHz | ETSI EN 300 220-1V3.1.1: 2017 ETSI EN 300 220-2 V3.1.1: 2017 |
| Audio/Video, Information and Communication Technology Equipment -Part 1: Safety Requirements | IEC 62368-1: 2018 |
Mechanical Tests | |
| Spring Hammer Test | IEC 62052-11:2003 |
| Vibration Test | IEC 62052-11:2003 |
| Shock Test | IEC 62052-11:2003 |
Wiring Mode
Wiring Mode | |
|---|---|
| 3P4W | 3-Phase 4-Wire Wye Direct Connection with 3CTs 3-Phase 4-Wire Wye Direct Connection with 4CTs 3-Phase 4-Wire Wye with 3PTs and 3CTs 3-Phase 4-Wire Wye with 3PTs and 4CTs |
| 3P3W | 3-Phase 3-Wire Direct Delta Connection With 3CTs 3-Phase 3-Wire Direct Delta Connection with 2CTs 3-Phase 3-Wire Delta with 2PTs and 3CTs 3-Phase 3-Wire Delta with 2PTs and 2CTs |
| 1P3W | 1-Phase 3-Wire Direct Connection with 2CTs |
| 1P2W L-N | 1-Phase 2-Wire, Uln Direct Connection with 1CT |
| 1P2W L-L | 1-Phase 2-Wire, Ull Direct Connection with 1CT |