Single-Phase AC Power Controller

Multi-Mode Closed-Loop Control

Seamlessly switch between constant voltage, constant current, and constant power modes to suit diverse load requirements — all configurable via the digital panel.

True RMS Sampling

Fully isolated voltage and current sampling system ensures highly accurate true RMS measurement with safe isolation between the control and power circuits.

Advanced Digital Interface

Intuitive digital panel displays real-time output voltage (V), current (A), power (kW), and RS-485 station number; all parameters are easily viewable and modifiable.

Comprehensive Multi-Layer Protection

Built-in overvoltage (E017), overcurrent (E018), and overheat protection (95°C threshold), plus load open-circuit detection and AC input loss monitoring.

RS-485 Modbus RTU Communication

Standard RS-485 Modbus RTU protocol (up to 115200 baud, address 1-247) enables remote monitoring, data logging, and seamless PLC/SCADA integration.

Integrated Thermal Management

Controller and heatsink are combined into a single compact unit; the SCR20CA-S variant adds a configurable cooling fan for demanding high-duty-cycle applications.

Flexible Installation

Pluggable, spring-loaded control terminals facilitate quick wiring and equipment replacement; supports both DIN rail and screw mounting for versatile panel integration.

Independent PID Control Loops

Three independent PID control loops (voltage, current, and power) with individually tunable P, I, and D parameters for precise and stable closed-loop performance.

Main Circuit Input Voltage

AC 220V / 380V (Selectable via parameter F033)

Output Current

40A (Rated)

Working Power Supply

24VDC, Power ≤ 3W

Control Signals

0-10V Analog (CON port) / 4-20mA Analog (CON1 port) — Switchable

Work Modes

Mode 0: Constant Voltage | Mode 1: Constant Current | Mode 2: Constant Power | Mode 3: Open-Loop

Operating Frequency

50/60Hz Adaptive

Output Voltage Asymmetry

< 2%

Voltage Instability

< 0.5%

Peak Withstand Voltage

≥ 1,400V (Forward and reverse)

di/dt

100 A/μS

dv/dt

500 V/μS

Sampling Method

True RMS (Fully isolated voltage and current sampling)

Communication Protocol

RS-485 Modbus RTU

Baud Rate Options

4800 / 9600 / 19200 / 38400 / 115200 (Default: 115200)

RS-485 Address Range

1 – 247 (Default: 1)

Overvoltage Protection

250V (at 220V input) / 450V (at 380V input)

Overcurrent Protection

Default 64.82A (Maximum 64.82A)

Overheat Alarm Threshold

95°C (Default); Auto-clear at 60°C; Output not shut down

Operating Ambient Temperature

-25°C to +45°C

Mounting Method

DIN rail or screw mounting

Dimensions (W×H×D) — with fan

109.8mm × 162mm × 51.6mm

Dimensions (W×H) — without fan

42mm × 148.4mm