SATEC PM135 multifunction power meter

The SATEC PM135 multifunction power meter is a compact, 3-phase device designed for reliable industrial energy metering and straightforward integration into control and monitoring systems. It measures voltage, current, power, energy and frequency, with RS-485 (EIA-485) as standard and optional Ethernet for integration with PLC and SCADA systems. The PM135 is commonly specified for plant switchboards, MCCs and utility metering panels where accurate kWh and demand data is required. The PM135 range covers both straightforward 3-phase energy metering and extended measurement where harmonics are required, without moving up to a full power quality analyser.

Models

• PM135P – Power Meter
• PM135E – Energy Meter
• PM135EH – Energy Meter with Harmonic Measurement

SATEC PM135 Datasheet

Key functions

• 3-phase energy metering (kWh, kvarh, kVAh) for LV/MV panels and feeders
• Class 0.5 / 0.5S accuracy (IEC 62053-22, model dependent)
• Voltage, current, power and frequency measurement (real, reactive and apparent)
• Demand and load profiling for trend analysis and energy monitoring
• Harmonics option (PM135EH) for harmonic measurements and basic power quality insight
• Modular communications: built-in RS-485 (Modbus RTU), with optional Ethernet (TCP/IP), PROFIBUS DP, DNP3 and IEC 60870-5-101/104
• Expandable I/O via plug-in modules: digital inputs/outputs and analogue outputs for alarms, status and simple control
• Local HMI (display and keypad) for commissioning checks and on-site diagnostics

Measurement inputs and I/O

The SATEC PM135 multifunction power meter is built for 3-phase metering in LV and MV panels, using external current transformers (CTs) to match the feeder or sub-metered circuit. It measures phase-to-phase and phase-to-neutral voltages, line currents, power (active, reactive and apparent), energy (kWh, kvarh, kVAh) and frequency, so trends remain consistent across balanced and unbalanced loads.
For integration, the PM135 supports plug-in modules for communications and I/O expansion. Depending on configuration, this includes digital inputs/outputs and analogue outputs for status, alarms and simple control in industrial monitoring systems.

Digital event logging and waveform capture

The PM135 supports digital event logging and basic waveform capture for monitoring, diagnostics and commissioning. It stores time-stamped records of status changes, configuration actions and abnormal conditions, helping engineers trace what happened and when during troubleshooting. Captured waveforms provide visibility of voltage and current behaviour around selected events for installation checks and verification tasks. These functions add operational context to routine energy monitoring, rather than replacing a dedicated power quality analyser or protection device.

Communication & I/O

The PM135 multifunction power meter integrates cleanly with PLC and SCADA systems. RS-485 (Modbus RTU) is provided as standard, with optional interfaces available depending on the build. PM135 communication options include Ethernet, PROFIBUS DP, DNP3 and IEC 60870-5-101/104, supporting common industrial and utility architectures without relying on protocol converters. I/O is provided via plug-in modules, enabling digital inputs and outputs for status and alarms, plus analogue outputs for interfacing with existing plant systems and controllers.

Applications

The PM135 is used where accurate 3-phase energy metering and dependable communications are required, without the complexity of a full power quality analyser. Typical applications include industrial sub-metering in manufacturing plants, process facilities and commercial buildings, and metering in MCCs and distribution boards. In utility and infrastructure projects, PM135 is integrated into LV and MV monitoring schemes via Modbus RTU, IEC 60870-5-101/104, DNP3 or PROFIBUS DP. It is also specified for energy monitoring and cost allocation in data centres, hospitals and multi-tenant facilities.