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Product Summary
The Allen-Bradley 1746-FIO4I is a fast analog combination module for SLC 500 systems. It merges two differential inputs with two current outputs into one single-slot unit. This design saves valuable rack space for critical applications. The module handles 0-20 mA and 0-10VDC input signals with high precision. Its 14-bit output resolution ensures accurate control signals for actuators. This module excels in systems requiring rapid signal acquisition.
Expert Technical Evaluation & Performance Review
The 1746-FIO4I module delivers a robust 7 kHz bandwidth for fast signal processing. It uses a successive approximation converter for the input channels. This method provides a conversion time of just 7.5 µs every 512 µs. The input resolution sits at 12 bits for reliable data capture. The output stage uses an R-2R ladder network for a 14-bit resolution. This combination ensures high fidelity for both measurement and control loops.
The module’s step response is critical for dynamic processes. It achieves a 100 ms step response on the input channels. The output step response is significantly faster at 2.5 ms. This allows the module to react quickly to changing process variables. The total update time for the module is 512 microseconds. Engineers can trust this speed for time-sensitive applications like motion control.
The analog input accuracy holds at ±0.440% of full scale at 25 degrees C. This precision degrades slightly to ±0.750% at 60 degrees C. The analog output accuracy is even tighter at ±0.298% of full scale. This performance makes the 1746-FIO4I suitable for critical loop control. The module maintains a non-condensing ambient humidity range of 5-95%. It operates reliably in varied industrial environments.
Product Procurement & Buyer Guide
Procurement managers should verify the 1746-FIO4I compatibility with their existing system. This module works with both fixed and modular SLC 500 hardware. It is compatible with controllers like the 1747-L20, L30, and L40. The module fits into a single slot of an expansion I/O rack. It draws 55 mA from the 5V backplane supply. It also requires 150 mA from the 24V backplane supply.
The module uses an open-type enclosure and mounts directly onto a chassis. You must use a shielded cable like Belden 8761 for wiring. The maximum wire size for the terminal block is 14 AWG. The input channels accept 0-20 mA current or 0-10 VDC voltage signals. The output channels provide a 0-20 mA current signal with 5% overrange. The maximum load for the output is 0-500 ohms with a 100 µH reactance.
Consider the 1746-FIO4I for applications with limited expansion space. It combines the function of separate input and output modules. This consolidation reduces overall system cost and complexity. The input channels have overvoltage protection up to 7.5V AC RMS. The backplane isolation is rated at 500V DC. This isolation protects the module from ground loop issues.
Logistics & Standard Packaging Details
- One (1) Allen-Bradley 1746-FIO4I Fast Analog I/O Module
- This module ships in a single, secure unit package.
- We provide express delivery shipping for this item.
- Carriers available include FedEx, UPS, and DHL.
