7AI354.7 B & R Automation
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The B & R Automation 7AI354.7 is part of the System 2003 Controllers series and features 4 analog inputs with differential input type. This module offers a resolution of 12 bits plus sign and comes with an input impedance of 20 megaohms, along with protection type IP20. It supports input voltages of ±10 V and has a power consumption of 0.5 watts.
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Product Description:
The 7AI354.7 is an analog input module produced by B & R Automation for the System 2003 Controllers series. Installed on the controller backplane, it converts field voltages into numeric values the CPU can process, letting a machine sequence react to pressure, flow, or position feedback coming from sensors. By concentrating the front-end conditioning on a dedicated card, the product separates raw signal wiring from the central processor and streamlines maintenance in distributed automation cells.
The module provides 4 differential channels that accept bipolar signals up to ±10 V. Each input presents an impedance of 20 MΩ, minimizing loading on high-resistance transducers. Conversion is handled with a 12-bit + sign A/D core, giving 1 LSB steps of 4.88 mV across the full span. Overall gain accuracy remains within 0.1% of final value, and linearity error is held to the same percentage, so scaling factors in the control program stay stable over temperature and time. The differential topology rejects common-mode noise that is typical on long cable runs, helping the controller obtain a reliable INT-formatted value for each scan.
An offset error of ±2.5 mV is the only correction normally required, and it can be trimmed in software without external potentiometers. Internal logic draws only 0.5 W, allowing dense stacking of I/O cards without exceeding the power budget of a System 2003 rack. The housing carries an IP20 rating, so it is intended for installation inside a grounded cabinet with forced air or convection cooling. Converted data is delivered to the CPU in INT format, simplifying arithmetic in ladder or structured text. Supply-voltage wiring protection is present, so accidental polarity reversal on the 24 V feeder will not damage the module.
Frequently Asked Questions about 7AI354.7:
Q: How many analog input channels does the 7AI354.7 provide?
A: The 7AI354.7 module features four independent analog input channels.
Q: What type of analog input is supported by the 7AI354.7?
A: It supports differential input signals, which helps reject common-mode noise.
Q: What is the input voltage range for the 7AI354.7 analog module?
A: The analog inputs can measure voltages in the range of ±10 V.
Q: What is the resolution of the analog inputs on the 7AI354.7?
A: This module offers a resolution of 12 bits plus a sign bit for measurement accuracy.
Q: Does the 7AI354.7 module include supply-voltage wiring protection?
A: The unit has supply-voltage wiring protection to guard against wiring errors.
