Power & Energy Monitoring
Energy Meter
Schneider Conzerv EM6433H / EM6436H / EM6459H
A family of 3-phase digital energy meters that deliver Class 1.0 and Class 0.5 accuracy across all major power parameters. With native RS-485 Modbus RTU communication and a standard 96 × 96 mm DIN form factor, these meters integrate directly with IntelliKran PLCs to bring energy visibility to any crane or industrial panel.
Cl 0.5
Best Accuracy
RS-485
Communication
480 V
Max L-L Input
UL / CE
Certifications
Features
Complete Energy Visibility in a Standard Panel Format
Full Power Metering
Measures kWh, kVAh, kVARh, kW, kVA, kVAR, voltage (L-N and L-L), current, power factor, and frequency simultaneously across all three phases.
Class 1.0 / 0.5 Accuracy
EM6433H and EM6436H offer Class 1.0 energy accuracy; the EM6459H steps up to Class 0.5 for precision billing and energy audit applications.
RS-485 Modbus RTU
Native RS-485 port connects directly to IntelliKran PLCs and SCADA systems using the industry-standard Modbus RTU protocol. Supports straight-line topology with up to 32 devices per segment.
UL, CE, RCM & EAC Certified
Carries international approvals — UL for North America, CE for Europe, RCM for Australia/New Zealand, and EAC for Eurasian markets — simplifying compliance across regions.
Wide Input Range
Control power accepts 48–277 V AC or DC (±10%), making the meter compatible with virtually all panel supply configurations without an additional power supply.
Compact DIN Panel Mount
Standard 96 × 96 mm front panel footprint fits any IEC 61554 cutout. Minimum side clearance of 28 mm allows meters to be mounted side by side in high-density panels.
Model Variants
Choose the Right Model
| Model | Type | Accuracy | RS-485 | Certifications |
|---|---|---|---|---|
| EM6433H | Digital Energy Meter | Class 1.0 | Optional | CE, RCM, EAC |
| EM6436H | Digital Multi-Function Meter | Class 1.0 | Standard | UL, CE, RCM, EAC |
| EM6459H | Digital VAF PF Meter | Class 0.5 | Standard | UL, CE, RCM, EAC |
Measured Parameters
What It Measures
Active energy (kWh) import/export
Reactive energy (kVARh) import/export
Apparent energy (kVAh)
Active power (kW) per phase and total
Reactive power (kVAR) per phase and total
Apparent power (kVA) per phase and total
Power factor per phase and total
Voltage L-N and L-L per phase
Current per phase and neutral
Frequency (Hz)
Demand (kW, kVA)
Voltage and current THD (EM6459H)
Applications
Where It Is Used
Crane motor energy consumption tracking and shift-level reporting
Sub-metering of individual crane panels in multi-crane bays
Energy audit baselines for ISO 50001 compliance programmes
Peak demand monitoring and demand charge reduction
Predictive maintenance via energy pattern analysis
Integration with IntelliKran PLC for unified load + energy data on the web dashboard
Technical Data
Specifications
| Model Range | Conzerv EM6433H / EM6436H / EM6459H |
| Accuracy Class (Energy) | Class 1.0 (EM6433H, EM6436H) / Class 0.5 (EM6459H) |
| Voltage Inputs | V1, V2, V3, VN — up to 277 V L-N / 480 V L-L (CAT III) |
| Current Inputs | Via external CTs — I1+/I1−, I2+/I2−, I3+/I3− |
| Control Supply | AC 48–277 V ±10% / DC 48–277 V ±10% |
| Communication | RS-485 Modbus RTU (D1+, D0−) |
| Recommended RS-485 Cable | Belden 3105A or 3106A |
| Termination Resistor | 120 Ω / 0.5 W (end of line, optional accessory) |
| Digital I/O | D0−, D1+ configurable |
| Panel Cutout | 92.0 +0.8 mm × 92.0 +0.8 mm |
| Overall Dimensions | 96 mm × 96 mm × 101.5 mm (H × W × D) |
| Minimum Side Clearance | 28 mm between adjacent meters |
| Power System Types | 5 via display; 13 via ION Setup software |
| Certifications | UL (EM6436H, EM6459H), CE, RCM, EAC |
| Wiring (Voltage terminals) | 0.82–3.31 mm² (18–12 AWG), strip 7 mm, torque 0.9–1.0 N·m |
| Wiring (CT terminals) | 2.08–3.31 mm² (14–12 AWG) |
| Fusing | 500 mA on L1 (and L2 for ungrounded neutral) |
Source: Schneider Electric QSG QGH1336801-02 — Conzerv EM6433H / EM6436H / EM6459H Quick Start Guide.
Safety & Installation Notes
- •Always turn off power before working on the meter or its wiring.
- •Fuse L1 with a 500 mA fuse. Fuse L2 when connecting an ungrounded neutral.
- •Always use grounded external CTs for current inputs.
- •RS-485 supports straight-line topology only — loop or ring topology is not supported.
- •Use Belden 3105A or 3106A shielded cable for RS-485. Terminate end-of-line with a 120 Ω / 0.5 W resistor.
- •Do not exceed 277 V L-N or 480 V L-L (CAT III) at any input terminal.
- •Apply appropriate PPE and follow NFPA 70E or applicable local electrical safety standards.
Get Started
Ready to add energy monitoring to your crane panel?
Contact our team with your panel voltage, CT ratio, and communication requirements and we will recommend the right EM6400 model and integration approach.