7AT352.7
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The 7AT352.7 is a thermal overload relay with a current range of 3.2–5.0 A and Class 10 tripping classification. Designed by B & R Automation as part of the System 2003 Controllers, it is mounted directly onto a contactor and offers IP20 enclosure protection. It has manual/automatic reset options and a visual trip indicator.
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Product Description:
The 7AT352.7 Analog Input Module is a dual channel PT100 temperature measurement module. It supports precise temperature monitoring for industrial automation applications. It is compatible with 3 wire RTD sensors and ensures reliable performance within compact control systems.
The 7AT352.7 analog input module accepts two PT100 sensor inputs using a 3 line connection as per IEC/EN60751 standard. It provides a 16 bit digital conversion resolution that ensures high accuracy temperature readings. The measurement ranges include two selectable ranges: -200.00 to +327.67 °C with 0.01 °C resolution and -200.0 to +850.0 °C with 0.1 °C resolution. The temperature conversion is handled automatically within the module. The measurement updates are available at intervals of 20 or 16.67 milliseconds. The maximum temperature measurement error at 25 °C is ± (0.17 + 0.0005 * Tf) °C. The drift per degree Celsius is limited to ± (0.01 + 0.000031 * Tf)°C. The module requires a measurement current of 2 mA and consumes a maximum of 0.4 W power. These specifications make it suitable for applications requiring precise and low drift temperature data over a wide range. It fits into an AF101 adapter module or CP interface for installation and system integration.
The 7AT352.7 analog input module lacks electrical isolation between input and PCC and between input channels which should be considered in system planning to avoid ground loop issues. The module is part of the B & R Automation 2003 screw in module series. It is designed for consistent automated temperature value conversion that removes the need for external computation. The internal processing provides direct temperature outputs based on sensor inputs. Its update time and internal processing make it suitable for real time or high frequency monitoring needs.
Frequently Asked Questions about 7AT352.7:
Q: Can the 7AT352.7 module maintain accuracy in demanding thermal environments with fast update cycles?
A: Yes, the 7AT352.7 provides fast temperature updates every 20 or 16.67 milliseconds. This fast refresh rate combined with 16-bit digital resolution ensures accurate real-time data for automation systems.
Q: How does the 7AT352.7 Analog Input Module handle long-term temperature stability in precision systems?
A: The 7AT352.7 features a low drift specification of ±(0.01 + 0.000031 * Tf)°C per °C. This makes it ideal for applications needing stable, repeatable measurements across wide thermal ranges.
Q: Does the 7AT352.7 analog input module provide electrical isolation between channels or input to PCC?
A: No, the 7AT352.7 lacks electrical isolation between its input channels and PCC. Designers must plan for this to avoid ground loop issues during integration.
Q: What sensor standards and connections does the 7AT352.7 module support for PT100 integration?
A: The 7AT352.7 supports 3-wire RTD PT100 sensors following the IEC/EN60751 standard. This ensures reliable and accurate measurement performance in compact control systems.
Q: How precise is the temperature measurement of the 7AT352.7 module at 25 °C?
A: At 25 °C, the maximum error is limited to ±(0.17 + 0.0005 * Tf)°C. This precision allows it to support high-accuracy applications in industrial automation.
