Selec MRJ4M-QUAD Multifunction Energy Meter
Selec MRJ4M-QUAD Multifunction Energy Meter | 4-Channel & 12-Channel
Advanced multi-channel true-RMS multifunction meter with RS-485 Modbus RTU, configurable CT/PT ratios, DIN-rail mounting, and energy measurement for up to 12 single-phase loads or 4 three-phase loads.
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The Selec MRJ4M-QUAD is an advanced multifunction energy meter designed for monitoring up to 4 three-phase loads or 12 single-phase loads. With true-RMS measurement, configurable CT/PT ratios, RS-485 Modbus RTU, and a high-clarity LCD with backlight, it delivers reliable power and energy data for industrial automation, panels, and energy management systems.
Key Features
True RMS measurement for accurate readings
Supports 4-channel (3Ø) or 12-channel (1Ø) configurations
RS-485 Modbus RTU communication (up to 19200 bps)
Programmable CT: 1A–10,000A and PT: 100V–10kV ratios
1-second display update rate
Multi-parameter display: V, A, PF, Hz, kW, kVAR, kVA
Energy measurement: kWh, kVARh, kVAh
LCD display with auto/manual scrolling
Photoelectric isolation & advanced surge protection
DIN-rail mounting, compact and robust design
Supports 128 devices in multi-point networks
CT polarity error detection & mounting validation
Technical Specifications (Table)
(All data directly extracted from manual pages 1–6)
| Parameter | Specification |
|---|---|
| Display | LCD with backlight; 1 line (4 digits) + 2 lines (7 digits) |
| Channels | 4-channel (3Ø) or 12-channel (1Ø) |
| Voltage Input | 60–300V AC (L-N), 104–520V AC (L-L) |
| Frequency Range | 45–65 Hz |
| CT Primary | 1A–10,000A (programmable) |
| CT Secondary | 330 mV |
| PT Primary | 100V–10kV (programmable) |
| PT Secondary | 100–500V AC |
| Communication | RS-485, Modbus RTU (Half Duplex) |
| Baud Rate | 300 to 19200 bps |
| Data Types | Float, Integer |
| Transmission Distance | Up to 500 m |
| Accuracy | V/A/P: ±0.5%; PF: ±0.01; Energy: ±1% |
| Operating Temp | –10°C to 55°C |
| Humidity | Up to 85% non-condensing |
| Mounting | DIN rail |
| Power Consumption | < 8 VA |
| Weight | 290 g |
Applications
Industrial energy audits
Multi-load monitoring in panels
Factory power distribution monitoring
HVAC & utility management
SCADA/PLC energy monitoring
Commercial building energy tracking
Solar and renewable systems
What’s in the Box
Selec MRJ4M-QUAD Meter
DB9-RJ45 communication cable
User instruction manual
Warranty card
FAQ
Q1: How many loads can the MRJ4M-QUAD measure?
A: It can monitor 4 three-phase circuits or 12 single-phase circuits simultaneously.
Q2: Does it support Modbus communication?
A: Yes, it supports RS-485 Modbus RTU with baud rates up to 19200 bps.
Q3: Can I configure CT/PT ratios?
A: Yes, both CT (1–10,000A) and PT (100V–10kV) are fully programmable.
Q4: What accuracy class does the meter meet?
A: Voltage, current, and power accuracy is ±0.5%, and energy accuracy is ±1%.
Q5: Is the meter DIN-rail mountable?
A: Yes, it is designed for DIN-rail mounting.
Q6: Does it support CT polarity check?
A: Yes, it features CT mounting validation (OK/Not OK/Invalid).