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SY351 · PID Digital Controller

Network-enabled 32-bit programmable process controller

Features
  • Standard industrial-grade compact controller using 32-bit ARM architecture
  • High sampling rate (50 µs) and fast control response
  • P, PI, PD, and PID control modes with independent element switching
  • Dual input summing point for reference and controlled variables
  • Output summing point for disturbance variable addition/subtraction
  • Manual parameter adjustment via encoders and digital display
  • LAN (Ethernet) connectivity for remote control and learning networks
  • Anti-windup limiter on integrator, adaptive smoothing on differentiator
SY351
Description
    The SY351 is a standard industrial-grade compact controller featuring 32-bit ARM architecture for high-performance closed-loop control. It excels with a high sampling rate (50 µs) and fast control response, making it suitable for demanding process control applications. The controller supports continuous closed-loop systems in P, PI, PD, and PID configurations. An input summing point accommodates two reference variables and one controlled variable, while a separate measurement point provides error signal feedback. The output summing point allows adding or subtracting external and internal disturbance variables. Manual parameter selection via buttons and digital encoders, with three 4-digit 7-segment displays showing actual control parameters. Three LED indicators provide overload status. Built-in anti-windup integrator limiter and adaptive differentiator smoothing for robust performance. LAN connectivity enables integration into learning networks for centralized control.
Schematic diagram of the SY351 apparatus
4mm safety sockets
+15V DC line
extra line for added flexibility
Inverted input ( ±10V ) Non-Inverted Inputs ( ±10V ) Output ( ±10V ) Control panels with potentimeter and display for each of the proportional, integral and differential elements Integrator RES\ET input Overshoot indicator lamp Control Error Output
0V line (ground)
-15V DC line

Schematic diagram of the SY351 apparatus

Schematic diagram of the SY351 apparatus

Schematic diagram of the SY351 apparatus
Technical Specifications
    Architecture 32-bit ARM microprocessor
    Supply voltage ±15V DC
    Signal voltage range -10V to +10V
    Sampling interval 50 µs
    Proportional gain (Kp) 0.01 to 100
    Integration time (Ti) 10 ms to 1000 s
    Derivative time (Td) 1 ms to 100 s
    Control modes P, PI, PD, PID (elements switchable)
    Integrator Anti-windup limiter with reset input
    Differentiator Adaptive smoothing, internal slope limiter
    Display Three 4-digit 7-segment displays
    Error signal indication Tendency LEDs (rising/descending/stable)
    Overload indication Three-color LED status lights
    Network interface RJ45 socket for LAN operation
    Software control Via L.control or control software

SPARE
PARTS

15 YEARS

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WARRANTY

5 YEARS

Sangari

Part of package

Process Control Training System

SY300
SY311
SY321
SY331
SY341
SY342
SY351
SY352
SY353
SY354
SY355

A complete modular platform for hands-on learning of feedback control, PID tuning, and process dynamics using real thermal, fluid, and mechanical systems.

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