WATLOW ANAFAZE CLS204 204-C10000AA CLS200 Series temperature controller

The CLS204 is a 4-channel compact controller in Watlow CLS200 series. Housed in a 1/8 DIN package, it integrates high-performance control and flexible configuration, making it suitable for scenarios requiring multi-loop temperature or process control. Its core advantages lie in the compact design: a single device supports 4 control loops, saving panel space and reducing installation time. It is compatible with thermocouples, RTDs, linear voltage/current, and pulse signals, adapting to a wide range of sensors. It also features built-in PID control, auto-tune, supports ramp and soak functions, and advanced control algorithms (requiring optional firmware). Additionally, it comes standard with EIA/TIA-232/485 serial ports, supports Modbus RTU protocol, and can interface with PLCs or computer systems. 

Data Sheet

Watlow CLS200 Manual.pdf

Hardware Specifications and Configuration

Appearance and Dimensions

Panel size: 1.96 inches (50mm) width × 3.78 inches (96mm) height.

Installation depth: 1.6 inches (41mm); with right-angle SCSI connector, it is 0.6 inches (15mm).

Input Characteristics

Sensor Types:

Thermocouples: Supports types B, E, J, K, R, S, T, with linearization, reference junction compensation, and fault detection (reverse connection, short circuit, open circuit) .

RTDs: Only supported by CLS204/208, 2/3-wire platinum resistors (100Ω@0°C), divided into two range gears:

RTD1: -148~527°F (-100~275°C), accuracy ±1.1°C .

RTD2: -184~1544°F (-120~840°C), accuracy ±1.6°C .

Linear signals: 0-20mA/4-20mA, 0-5VDC, 0-10VDC (scaling resistors required) .

Pulse input: 1 channel of TTL-level square wave, up to 2kHz .

Sampling rate: 6 samples per second (update time 0.167s), internal measurement resolution up to 0.006% (>14 bits) .

Output Characteristics

Digital outputs: 34 channels via 50-pin terminal board; 10 control channels via 18-pin terminal board. Each loop can allocate 1-2 outputs, supporting on-off or distributed zero crossing (DZC) control. Single-channel output sink current: 60mA@5VDC .

Alarm outputs: Independent high/low temperature and deviation alarms for each channel, supporting global alarm output and watchdog signal .

Communication and Power Supply

Serial port: EIA/TIA-232 or 485 (configurable terminal resistor), baud rate 2400/9600/19200bps, supporting Modbus RTU protocol .

Power supply: 15-24VDC (±3V), max. 1A; 300mA under no load (power adapter configuration for 204-C10000AA needs confirmation) .

Firmware and Functional Options

The firmware of CLS204 can be configured with different functions according to the model suffix (e.g., "C10000AA"):

Standard firmware: Includes closed-loop PID control, auto-tune, alarms, job memory (8 jobs), and sensor fault detection .

Ramp and Soak: Extends standard functions, supporting programmed heating/cooling and soaking stage control. Each channel can be configured for PID or ramp mode, and unused outputs can be used for signal retransmission .

Enhanced features: Includes process variable retransmission, remote analog setpoint, cascade control, ratio control, and differential control. Cascade control requires 2 loops per channel .

Modules and Expansion Options

DAC/SDAC Modules (Optional)

DAC (Digital to Analog Converter): Converts DZC outputs to analog signals (4-20mA, 0-5V, 0-10V), supporting 1-2 channels per module .

SDAC (Serial Digital to Analog Converter): High-precision analog output for process variable retransmission, open-loop control, or motor speed regulation, requiring separate configuration (e.g., "AA" in the model may relate to the SDAC option) .

Terminals and Cables

Terminal board: "1" in 204-C10000AA may indicate an 18-pin terminal block (only supported by CLS204/208), with a standard SCSI cable (3 ft, right-angle interface optional) .

Communication cable: Optional 10-ft DB-9 serial cable ("0" in the model indicates no cable) .

Model Code Analysis (Taking 204-C10000AA as an Example)

• 204: 4-channel controller.
• C: Custom firmware (functions need to be confirmed based on specific requirements).
• 1: 18-pin terminal block.
• 0: No power adapter (requires additional configuration of 120/240VAC power supply).
• 0: No SCSI cable (or 3-foot standard cable).
• 0: EIA/TIA-232 communication (not 485).
• 00: Standard inputs (thermocouples and -10~60mV signals).
• AA: Custom options (may relate to power supply or module configuration; refer to factory specifications for details).

Application Scenarios

• Industrial furnace temperature control, semiconductor manufacturing equipment, laboratory thermostatic systems.
• Batch processing technologies (e.g., heat treatment, baking), using ramp-and-soak functions for programmed temperature control.
• Automated production lines integrated with PLCs, enabling data acquisition and centralized monitoring via serial communication.

Precautions

• Sensor configuration: RTD inputs are only supported by CLS204/208 and require scaling resistors; linear signal inputs need range confirmation and factory customization. 
• Output load: The maximum sink current of digital outputs is 60mA; ensure the power consumption of external devices does not exceed the limit. 
• Firmware upgrade: For custom firmware (e.g., suffix "C"), contact the manufacturer to confirm functional details and avoid compatibility issues.

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