Yokogawa SC42-SP34 Temperature Controller | 1/4 DIN, PID, Thermocouple, Relay Output

Yokogawa SC42-SP34 Temperature Controller | 1/4 DIN, PID, Thermocouple, Relay Output

Yokogawa SC42-SP34 controller specifications. 1/4 DIN temperature controller, J thermocouple input, relay output, PID control.

Product Overview

The Yokogawa SC42-SP34 is a 1/4 DIN single-loop digital controller from the YS100/YS1000 series. It is a dedicated temperature controller configured for a specific thermocouple input type (J thermocouple indicated by "SP34") and provides PID control with a relay output. It is designed for straightforward temperature control applications in industrial ovens, furnaces, and other heating processes.

Technical Specifications

Key Features

• Fixed Thermocouple Input:​ Pre-configured for Type J thermocouple; simple setup

• Relay Output:​ For direct switching of contactors or small heaters

• PID Control with Auto-tuning:​ Ensures stable temperature regulation

• Compact 1/4 DIN Design:​ Saves panel space

• Dual LED Display:​ Shows Process Value (PV) and Set Value (SV) simultaneously

• Rugged Front Panel:​ IP66 rating for protection against dust and water

• Universal Power Supply:​ 100-240V AC for global use

• Easy Operation:​ Simple front-panel interface for setpoint and parameter adjustment

Applications

• Temperature control for industrial ovens, furnaces, and dryers

• Plastic processing and packaging machinery

• Environmental test chambers

• Food processing equipment

• General-purpose heating process control

Important Notes

1. The input is fixed for J-type thermocouples; ensure sensor compatibility

2. The relay rating is typically 250V AC, 3A resistive; verify load requirements

3. Auto-tuning (AT) should be performed after installation for optimal PID parameters

4. This is a basic controller; for communication, an optional expansion module is required

5. The alarm function is typically assigned to the control relay or a separate alarm output if available