The Allen-Bradley 1746-FIO4I is a specialized high-speed analog combination I/O module engineered for the SLC 500 programmable controller platform. Designed for demanding control environments, this module provides a rapid response time that exceeds the capabilities of standard analog I/O units. It occupies a single slot in the chassis and supports a mix of analog signal processing, featuring two input channels and two output channels.
Features
High-Speed Processing: Utilizes successive approximation conversion to achieve a rapid 7.5 microsecond conversion time.
Signal Versatility: Inputs are configurable for either voltage (0–10V DC) or current (0–20 mA) signals, while the two outputs are dedicated to 0–20 mA current loops.
Optimized Bandwidth: Engineered with a 7 kHz bandwidth for precise signal tracking in high-frequency applications.
Resolution: Provides 12-bit resolution for inputs and 14-bit resolution for outputs to ensure accurate signal representation.
Compatibility: Fully compatible with both modular and fixed SLC 500 hardware configurations.
Technical Specifications
Brand
Allen-Bradley
Product Line
SLC 500
Module Type
Fast Analog Combination I/O
Inputs
2 Channels (Voltage or Current)
Outputs
2 Channels (Current: 0–20 mA)
Input Resolution
12-bit
Output Resolution
14-bit
Conversion Method
Successive Approximation
Conversion Time
7.5 µs
Update Time
512 µs
Backplane Current (5V)
55 mA
Backplane Current (24V)
150 mA
Operating Temperature
0 to 60 degC (32 to 140 degF)
Installation Guidelines
Ensure power is removed from the SLC 500 chassis before inserting or removing the 1746-FIO4I module to prevent electrical damage.
The module should be seated firmly in the chassis slot and secured using the provided mounting screws to ensure proper backplane connection.
Use shielded twisted-pair cabling for all analog signal connections to minimize EMI interference, ensuring the shield is grounded at one end only.
Maintain adequate ventilation within the control cabinet to keep ambient temperatures within the specified 0 to 60 degC range.
Verify that input/output wiring is correctly terminated according to the signal type (voltage vs. current) before applying power.
FAQ
What does the 'F' in 1746-FIO4I stand for?
The 'F' designates 'Fast', indicating that the module is specifically designed for high-speed applications requiring faster conversion and update times than standard analog modules.
Can this module be used in a fixed SLC 500 chassis?
Yes, the 1746-FIO4I is compatible with both fixed and modular SLC 500 hardware platforms.
