Tag: WATLOW

The Watlow CLS204 is a multi-loop temperature and process controller used in a wide range of industrial applications for temperature control, heating and cooling processes. Here are some typical parameters and function descriptions of the controller:
Main parameters and functions:
1. Input and output
Input type:
Multiple sensor types are supported:
Thermocouple: J, K, T, E, N, R, S, B type, etc.
Thermal resistance (RTD) : 100Ω platinum RTD, DIN or JIS standard.
Linear input: 0-10VDC, 4-20mA.
Accuracy: ±0.1% range.
Output type:
Analog output: 4-20mA or 0-10V for driving control devices.
Digital output: Relay output or solid-state relay drive for heater or cooling equipment.
Optional SSR (solid state relay) trigger.
2. Control function
Control mode:
Support PID control, with Auto-tune function.
Support single loop or multi-loop control (usually 4 loops).
Adjustment function:
Programmable set point (Setpoint).
Ramp and Soak control is supported.
Alarm function:
Multiple alarm options: high limit, low limit, deviation alarm, etc.
LED or external alarm output indication.
3. Communication and interfaces
Communication protocol:
Modbus RTU communication, remote monitoring and configuration via RS-485.
Optional Ethernet interface support.
Remote operation:
Support parameter setting and monitoring via HMI or computer.
4. Physical specifications
Size:
Panel mount, usually conforming to standard 1/8 DIN or similar specifications.
Display screen:
Digital display that provides current status, set point and alarm information.
Configurable LED indicator or text display.
Keys or knobs:
Used to set parameters, select menus, and adjust values locally.
5. Environmental adaptability
Operating temperature: 0°C to 50°C.
Storage temperature: -20°C to 80°C.
Protection class: IP65 or higher (depending on the tightness of the mounting panel).