Get now the 2080-RTD2, a precision-grade 2-channel RTD input plug-in module designed to expand the thermal sensing capabilities of Allen-Bradley Micro800 controllers. This module provides the high-resolution temperature data required for professional process control and HVAC applications.
What Is the 2080-RTD2?
The 2080-RTD2 is a high-accuracy temperature measurement module that plugs directly into the front of Micro820, Micro830, Micro850, and Micro870 PLCs. It provides two channels specifically optimized for Resistance Temperature Detectors (RTDs), including the industry-standard Platinum (Pt100, Pt200, Pt500, Pt1000), Copper, and Nickel types. With a 14-bit resolution, the 2080-RTD2 ensures that the controller receives stable, repeatable temperature data for critical thermal processes such as industrial ovens, refrigeration units, and chemical mixers. Its non-isolated architecture is designed for cost-effectiveness and compact integration, eliminating the need for external signal conditioners. The module includes built-in linearizing logic, which automatically converts the resistance signal into a digital value in degrees Celsius or Fahrenheit, simplifying the programming workload in the Connected Components Workbench software.
Key Technical Specifications
- Channels: 2 (Non-isolated)
- Input Types: Pt100, Pt200, Pt500, Pt1000, Ni120, Cu10 (2-wire, 3-wire, or 4-wire)
- Resolution: 14-bit
- Accuracy: +/- 1.0°C (typical) depending on sensor type
- Update Rate: 200ms per channel
- Dimensions: 62 x 31.5 x 20 mm
- Power Consumption: 24V DC (20mA)
- Operating Temperature: -20…65°C (-4…149°F)
System Integration and Thermal Logic
The 2080-RTD2 is a foundational component for localized PID control loops. By integrating high-resolution thermal feedback directly into the PLC via the plug-in bus, engineers can implement precise heating or cooling control with minimal network latency. The module architecture supports open-circuit and short-circuit detection, allowing the PLC to trigger a safe state if a sensor wire is damaged. Within the CCW environment, the 2080-RTD2 is configured with a simple drop-down menu for sensor type selection, and the scaling is handled natively by the module, making the data instantly usable in standard ladder logic blocks.
Expert Tips
For the most accurate temperature readings, we recommend using 3-wire or 4-wire RTD sensors to compensate for the lead-wire resistance, especially in applications where the sensor is located more than 10 meters from the controller. If you are experiencing signal drift, verify that the 2080-RTD2 is not placed in a plug-in slot directly adjacent to a high-heat component like a power supply or a high-current relay. To protect the 14-bit resolution from electrical noise, always use shielded cables and ensure the shield is terminated at the PLC’s functional earth terminal.
Frequently Asked Questions
Q: Does the 2080-RTD2 support thermocouples?
A: No, the 2080-RTD2 is specifically for resistance-based sensors. For thermocouples, you should use the 2080-TC2 plug-in module instead.
Q: Can I connect a 2-wire RTD to this module?
A: Yes, 2-wire sensors are supported, but you must jumper the compensation terminals at the module block to ensure proper operation, though accuracy may decrease due to wire resistance.
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