Description

The B&R 7AT664.70 is a high-precision 4-channel temperature input module designed for the X20 modular automation system by B&R Industrial Automation (a member of the ABB Group). This intelligent I/O module enables accurate acquisition of temperature data from a wide range of resistance temperature detectors (RTDs) and thermocouples (TCs), making it ideal for applications requiring tight thermal control—such as plastic extrusion, food pasteurization, pharmaceutical sterilization, and semiconductor processing.

Each of the four channels on the 7AT664.70 is individually configurable via software to support multiple sensor types:

• RTDs: Pt100, Pt1000, Ni100, Ni1000 (with 2-, 3-, or 4-wire connection)

• Thermocouples: Types J, K, L, N, R, S, T, B, E

The module performs automatic linearization, cold-junction compensation (for TCs), and lead-resistance compensation (for 3-/4-wire RTDs) onboard, delivering calibrated temperature values directly to the PLC program—eliminating complex calculations in the controller. With 24-bit analog-to-digital conversion, it achieves high resolution and accuracy (typically ±0.1°C for RTDs), even in electrically noisy industrial environments.

All channels feature galvanic isolation from the internal X20 bus and from each other (up to 500 V RMS), preventing ground loops and ensuring signal integrity when measuring sensors at different potentials (e.g., in multi-zone ovens). The 7AT664.70 supports hot swapping in compatible X20 configurations and includes LED indicators per channel for quick diagnostics (e.g., sensor break, overrange). Configuration and calibration are handled seamlessly through B&R Automation Studio, with full integration into mapp Technology components like mapp Temperature.

B&R 7AT664.70

Technical Specifications

Main Features and Advantages

✅ Universal Per-Channel Sensor Support:
No need for multiple specialized modules—each channel independently supports RTD or thermocouple types, enabling mixed-sensor applications (e.g., Pt100 in reactor + Type K in exhaust).

✅ Onboard Signal Conditioning & Linearization:
Temperature values are computed directly on the module, reducing CPU load and simplifying PLC code—ideal for high-channel-count systems.

✅ High Reliability in Harsh Environments:
Galvanic isolation and robust EMC design ensure stable operation near VFDs, welders, or RF heaters—common in automotive or metal processing plants.

✅ Advanced Diagnostics:
Automatic detection of broken wires, short circuits, or out-of-range signals triggers alarms in the control logic, supporting predictive maintenance and process safety.

✅ Seamless Integration with B&R Ecosystem:
Works natively with X20 CPUs, ACOPOS drives, Panel PCs, and mapp Temperature—accelerating development of thermal control applications.

Application Field

In a food packaging line, the 7AT664.70 monitors sealing jaw temperatures (via Type K) and product core temperature (via Pt100 probes) to ensure hermetic seals without overheating sensitive films.

At a biopharmaceutical facility, it acquires data from autoclave chamber sensors (Pt100, 4-wire) during SIP (Sterilization-in-Place) cycles, providing validated temperature profiles for regulatory compliance (FDA 21 CFR Part 11).

In an aluminum die-casting machine, the module reads mold surface temperatures (Type J) and hydraulic oil temp (Ni100) to optimize cycle time and prevent premature tool wear.

B&R 7AT664.70

Related Products

• X20CP1585 / X20CP3585: X20 CPU modules—required to interface with70

• 70 / 7AT364.70: Lower-channel-count temperature modules (2 or 4 channels, different specs)

• 70: General-purpose analog input module—for non-temperature voltage/current signals

• X20TB12 / X20TB52: Terminal blocks—spring-cage or screw-type for field wiring

• Automation Studio: Engineering software for configuration, diagnostics, and programming

• mapp Temperature: Ready-to-use software component for PID control, ramp/soak, and data logging

• X20BM11 / X20BM15: X20 backplanes—for mounting multiple I/O modules