3AT660.6/Z B & R Automation
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The B & R Automation 3AT660.6/Z is a controller module in the System 2005 Controllers series, offering 8 differential inputs and a total power usage of 6 W. It features channel to PLC isolation and supports thermocouple types J, L, and K. The module provides a converter resolution greater than 14-bit and uses a voltage/frequency conversion principle.
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Product Description:
The 3AT660.6/Z is an analog input module manufactured by B&R Automation for the System 2005 Controllers series. Mounted on the system backplane, it captures low-level voltage or thermocouple signals and transfers the digitized results to the central processor. Within an industrial automation cell, the module supplies isolated, high-accuracy measurement channels that let the controller supervise temperature zones, flow conditions, and other process variables without relying on separate stand-alone instrumentation. This arrangement helps keep sensing functions inside the control platform while supporting stable data handling across multiple monitored inputs.
For each differential input, the module relies on a voltage-to-frequency conversion stage that feeds an internal counter of 23,841 increments, establishing the raw numerical span presented to the CPU. The converter delivers more than 14-bit of effective resolution, which supports fine interpolation when using J, L, or K thermocouples. Two deterministic sampling windows are available: a full conversion ends in 116.68 ms when the controller cycle is 16.67 ms, or in 130 ms when the base period is 20 ms. During acquisition, the circuitry tolerates common-mode excursions of ±9 V, and each channel is galvanically isolated from the PLC logic to suppress ground loops. An 8 Hz input filter mitigates high-frequency noise, while the inputs are arranged in two independent groups with eight differential signals overall.
Operational resilience is reinforced by the ability to track ground potential modulation up to ±50 V, helping protect the conversion core from plant transients. Sensor loading is minimal because input resistance exceeds 1 MΩ, allowing long cable runs without noticeable signal loading. Measurement data are returned to the controller in INT format, so application code can process values directly in standard integer form. Even with isolation, filtering, and conversion hardware active, the board draws only 6 W, which helps preserve thermal margin in the System 2005 rack. This low power demand also supports dense cabinet layouts where multiple I/O modules operate side by side.
Frequently Asked Questions about 3AT660.6/Z:
Q: Which thermocouple types are compatible with the 3AT660.6/Z module?
A: The 3AT660.6/Z supports thermocouple types J, L, and K for temperature input.
Q: How many inputs does the 3AT660.6/Z module support?
A: The input count on this model is eight, allowing for multiple sensor connections.
Q: Does the 3AT660.6/Z module provide channel-to-PLC isolation?
A: Input to PLC isolation is provided on the 3AT660.6/Z for safer integration.
Q: What conversion principle does the 3AT660.6/Z use?
A: This module features a conversion principle based on a voltage/frequency converter.
Q: What is the input resistance of the 3AT660.6/Z module?
A: The input resistance of the 3AT660.6/Z module is greater than 1 MΩ.
