7AT664.70-1 B & R Automation
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The B & R Automation 7AT664.70-1 is part of the System 2003 Controllers series and features four thermocouple inputs with a 16-bit converter resolution. It supports an overall temperature range from -270 to +1768°C and provides disturbance suppression at 50 Hz. The module offers IP20 protection, consumes a maximum of 0.4 watts, and achieves a sensor temperature resolution of 0.1°C per LSB.
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Product Description:
The 7AT664.70-1 is a thermocouple input module manufactured by B&R Automation for the System 2003 Controllers series. By connecting temperature sensors directly to the controller backplane, the card supplies digitized process data to automation tasks that require continuous thermal monitoring, such as furnace control or cryogenic storage. Its circuitry accepts multiple thermocouple types and provides cold-junction compensation so the PLC receives accurate readings over wide environmental swings.
The onboard converter operates with a resolution of 16-bit, so each measurement is split into 65,536 discrete steps before it is placed on the system bus. Disturbance rejection at 50 Hz filters power-line interference that would otherwise corrupt microvolt-level inputs. For every least significant bit, the analog front end changes by only 2 µV/LSB, and after linearization this translates to a sensor granularity of 0.1 °C/LSB. Despite this precision, overall power draw is limited to 0.4 W maximum, allowing dense cabinet layouts without exceeding typical 24 VDC supply budgets. The card is dedicated to thermocouple sensing and includes automatic cold-junction tracking rather than resistive or voltage inputs.
Four isolated channels accept Type J ranges from -210 to +1200 °C, Type K from -270 to +1372 °C, and Type S from -50 to +1768 °C; together they give an overall capability of -270 to +1768 °C. Input voltages are evaluated across a span of ±65534 µV, and the module carries an enclosure rating of IP20 for installation inside a protected control cabinet. A built-in algorithm applies temperature compensation, maintaining accuracy when terminal strips operate between -55 and +125 °C. Long-term integrity is preserved over a storage range of -25 to +70 °C. With 4 inputs available, a single card can monitor several process points while respecting base-unit power and noise limits.
Frequently Asked Questions about 7AT664.70-1:
Q: How many temperature inputs does the 7AT664.70-1 module support?
A: This module supports four thermocouple inputs for temperature monitoring.
Q: What type of temperature sensor inputs are compatible with the 7AT664.70-1?
A: The 7AT664.70-1 accepts thermocouple input types, enabling precise temperature measurement from various sensors.
Q: What is the overall temperature range handled by the 7AT664.70-1 module?
A: The temperature measurement range is from -270°C to +1768°C, enabling use in a wide spectrum of applications.
Q: What is the converter resolution for the 7AT664.70-1 temperature module?
A: It provides a converter resolution of 16 bits, allowing for detailed data acquisition from temperature sensors.
Q: What level of protection does the 7AT664.70-1 module have?
A: The module is rated with IP20 protection, offering basic protection against solid objects but no protection against liquids.
