Omron CQM1-TC001 High-Function Temperature Control Module

The Omron CQM1-TC001 is a specialized temperature control unit designed for the CQM1 and CQM1H series programmable logic controller systems. This high-function module integrates the capabilities of standalone temperature controllers directly into the PLC architecture, providing up to four independent temperature control loops in a single unit. The module accepts direct input from thermocouples or platinum resistance thermometers and provides transistor output pulses for driving solid-state relays or contactors, making it suitable for industrial heating applications requiring precise temperature regulation.

Key Specifications

• Model: CQM1-TC001 Temperature Control Module

• Product Series: CQM1/CQM1H Special I/O Unit

• Temperature Input Types: Thermocouple (K, J, T, E, R, S, B, N, L, U) / Platinum resistance (Pt100, JPt100)

• Control Loops: 4 loops (4-loop configuration) or 2 loops (2-loop configuration with heater burnout alarm)

• Control Method: 2-degree-of-freedom PID control with auto-tuning

• Output Signal: Transistor PNP output (pulse)

• Sampling Period: 250 ms

• Temperature Range (Thermocouple): K: -200 to 1300°C, J: -100 to 850°C, T: -200 to 400°C, R/S/B: 0 to 1800°C

• Analog Input Signal Ranges: -10 to 10V, 0 to 10V, 0 to 5V, 4 to 20mA

• Control Output Type: Voltage (0-10V DC) or Current (4-20mA DC) output formats

• Resolution (Input): 0.1°C

• Resolution (Output): 1/4000 of full scale

• Accuracy (Thermocouple Input): ±0.3% of full scale

• Accuracy (Analog Output): ±0.2% of full scale

• Isolation: Photocoupler isolation between input/output and PLC bus

• Dimensions: 25 × 110 × 107 mm (W × H × D)

• Weight: 170 g max

Flexible Temperature Input Configuration

The CQM1-TC001 supports a wide range of thermocouple types, enabling compatibility with various temperature measurement applications. Supported thermocouple types include K (chromel/alumel), J (iron/constantan), T (copper/constantan), E (chromel/constantan), R and S (platinum/rhodium alloys), B (platinum-30% rhodium/platinum-6% rhodium), N, L, and U. Platinum resistance thermometer inputs (Pt100, JPt100) are also supported for applications requiring higher accuracy and stability. Each input channel can be independently configured for the appropriate sensor type and measurement range, providing flexibility for systems with diverse temperature measurement requirements.

Advanced PID Control with Auto-Tuning

The CQM1-TC001 utilizes 2-degree-of-freedom PID control, an advanced algorithm that provides improved setpoint tracking and disturbance rejection compared to conventional PID controllers. This control method reduces overshoot during startup while maintaining fast response to process disturbances. The built-in auto-tuning function automatically calculates optimal PID parameters based on the thermal characteristics of the controlled system, eliminating the need for manual tuning and reducing commissioning time. The sampling period of 250 ms provides responsive control for thermal systems with moderate time constants.

4-Loop and 2-Loop Configurations

The CQM1-TC001 can be configured for either 4-loop temperature control or 2-loop temperature control. In the 4-loop configuration, all four channels operate as independent temperature control loops, suitable for applications requiring simultaneous regulation of multiple temperature zones. In the 2-loop configuration, two channels provide primary temperature control while the remaining capability is allocated to critical process monitoring. When configured for 2-loop control, the module provides a heater burnout alarm function that monitors current flowing to heating elements and detects open-circuit failures, essential for applications where heating element integrity is critical.

Heater Burnout Alarm Function

The heater burnout alarm function is a key feature of the CQM1-TC001, particularly valuable for applications where undetected heater failure could compromise product quality or process safety. The module monitors the current drawn by each heating element and compares it against programmed thresholds. If the current falls below the expected range, indicating a failed or degraded heating element, the alarm output is activated. The heater burnout alarm can be used to trigger visual indicators, sound alarms, or initiate corrective actions through the PLC program, enabling proactive maintenance before production is affected.

Analog Input and Output Capabilities

In addition to temperature control functions, the CQM1-TC001 provides analog input and output capability for broader process monitoring applications. The module supports analog input signal ranges including -10 to 10V, 0 to 10V, 0 to 5V, and 4 to 20mA, enabling connection to pressure, flow, level, and other process transmitters. Analog output signals in voltage (0-10V DC) or current (4-20mA DC) formats can be used to interface with variable frequency drives, proportional valves, and chart recorders. The 0.1°C input resolution and 1/4000 output resolution ensure precise measurement and control.

PLC Integration and Command-Based Control

The CQM1-TC001 is fully integrated into the CQM1/CQM1H PLC system as a Special I/O Unit, requiring no external temperature controllers. Parameters can be set and data can be read from the module by transferring commands from the PLC CPU, using standard move and instruction operations. The user program writes setpoint values, reads current process temperatures, monitors alarm status, and adjusts PID parameters as needed, allowing the temperature control function to be coordinated with overall machine control logic. The module is compatible with CQM1H-CPU51/61 CPU units and CQM1-CPU41/42 units.

Industrial Applications

The Omron CQM1-TC001 temperature control module is deployed across a wide range of industrial heating applications requiring precise temperature regulation. In plastic processing, it controls barrel and mold temperatures on injection molding machines and extrusion equipment. In packaging machinery, it regulates sealing jaw temperatures for consistent seal quality. In heat treating furnaces, it controls workpiece temperatures for annealing, hardening, and tempering processes. In food processing, it maintains cooking and holding temperatures for product quality and safety. The module's 4-loop configuration allows simultaneous control of multiple temperature zones from a single PLC unit.

Environmental and Installation Specifications

The CQM1-TC001 is designed for installation in industrial control environments. The unit mounts directly to the CQM1/CQM1H CPU rack or expansion rack, connecting to the backplane for power and data communication. The module must be connected between the Power Supply Unit and the CPU Unit, occupying one Special I/O Unit slot. Power requirements include a maximum current consumption of 250 mA from the 5V DC backplane supply. The unit operates within the temperature and humidity specifications of the CQM1 PLC system, ensuring reliable performance in typical factory conditions.

Conclusion

The Omron CQM1-TC001 high-function temperature control module provides 4-loop or 2-loop temperature control with PID auto-tuning, thermocouple/RTD inputs, transistor outputs, and heater burnout alarm for CQM1/CQM1H PLC systems. Its integrated analog I/O, flexible configuration, and command-based control make it a comprehensive solution for industrial temperature regulation applications.