Features of the SCR Controller
This SCR controller is designed for precise power regulation and compatible with various thyristor diode modules power semiconductors used in industrial heating, motor speed control, and resistive load management.
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Linear phase-shift control ensures stable performance and high regulation accuracy.
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Modular design with strong voltage resistance, excellent anti-interference capability, and reliable long-term operation.
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Built-in fast-acting fuse provides effective protection against overcurrent and short-circuit conditions.
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Vacuum-welded structure with optimized heat dissipation, ensuring high durability, extended service life, and enhanced safety.
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Multi-function LED indicators display operating status in real time for easy monitoring and maintenance.
Terminal Functions & Wiring Symbols
The following table explains the wiring definitions and thyristor symbols commonly used in SCR power regulators. Understanding these marks helps ensure correct installation and avoids wiring mistakes.
| NO. | Mark | Functional Description |
| 1 | P+ | Reference power supply +5V:Feed reference for external potentiometers |
| 2 | AI1 | Current analog input port1:DC0~20420mA(inputimpedance 1252),with 4-terminal GND to form an input loop. |
| 3 | AI2 | Voltage analog input port 2: 0~5V input/potentiometer input (center tap)/DC0~10V, and GND form the input circuit. 0~5V 0~10V no need to connect P+ |
| 4 | GND | Sianal common ground: analog signal negative terminal, switch signal common terminal |
| 5 | PWM | Signal Analog,PWM Input Port |
| 6 | 4-20mA Output | 4-20mA output+ |
| 7 | COM | 4-20mA output- |
| 8 | A | RS485 communication port,RS485+ |
| 9 | B | RS485 communication port,RS485- |
| 10 | SW1 | External start/stop control terminal:SW1and 12 terminal GND constitute the start/stop, when the two terminals are closed,the adjuster work |
| 11 | SW2 | Analog input port selection:SW2 and terminal 12 GND,closed to select analog input port 2; disconnected to selectthe input port |
| 12 | GND | Signal common ground:analog signal negative terminal,switch signal common terminal |
| 13 | NO | Output relay 1:according to the menu A basic parameters A07 function selection can be used as an output signal,or fault alarm output signal No.,load capacity AC240V/5A,DC24V/5A NO:Normally open NC:Normally closed |
| 14 | COM | |
| 15 | NC | |
| 16 | NO | Output relay 2:according to the menu A basic parameters A08 function selection can be used as an output signal,or fault alarm output signal No.,load capacity AC240V/5A,DC24V/5A NO:Normally open NC:Normally closed |
| 17 | COM | |
| 18 | NC | |
| 19 | L | External AC 220V power supply |
| 20 | N |
Basic application wiring: 4~20mA control signal input positive to terminal 2 Al1, negative to terminal 4 GND. start terminals 10 and 12 have been factory connected, default power on start.
lf you need to install a starting switch on the control cabinet, you can make 10 and 12 as a switch.
Safety reminder: it is recommended to use the alarm output function of the power conditioner when designing the electrical wiring, the power conditioner for the load and power supply has a perfect
alarm function, when there is any abnormality, it can be the first time alarm output.
Analog Input Wiring
A00 Start/stop control mode = 0 terminal contro
A01, operating mode = 3 open loop
A02 Input signal selection = 1 Analog signal AI1
Voltage Analog Input Wiring
A00 Start/stop control mode = 0 terminal control
A01, operating mode = 3 open loop
A02 Input Signal Selection = 2 Analog AI2
1-10V:
A06 Voltage input analog type = 1: 0-10V
Digital Control Wiring
A00 Start/Stop Control Mode =1 (Keyboard Control)
A01 Opera-ting Mode = 3 (Open Loop)
A02 Input Signal Selection = 0 (Dig-ital)
Potentiometer wiring
A00 Start/stop control mode = 0 terminal control
A01 operating mode = 3
open loop A02 Input Signal Selection = 2 Analog AI2
Manual automatic control wiring
A00 Start/Stop Control Mode = 0 Terminal Control
A01 Operating Mode = 3 Open-Loop
A02 Input Signal Selection = 3 SW2 Selection
Second channel limit input wiring
A00 Start/stop control mode = 0 terminal control
A01 operating mode = 3 open loop
A02 Input Signal Selection =1 Analog Signal AI1
A03 Second Analog Input Limit =1 On
Precautions
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Three-phase 3-wire input, no phase sequence required.
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Secure all main terminals to avoid overheating and SCR damage.
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Use correct fuse levels to protect the SCR module.
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Neutral wiring rules differ for Y-type and unbalanced loads.
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