Product Summary
The Allen-Bradley 1746-FIO4I is a fast analog combination module for SLC 500 systems. It integrates two differential input channels and two current output channels into a single slot. This design saves valuable rack space while delivering high-speed signal processing for critical applications.
Product Procurement & Buyer Guide
Why Choose the 1746-FIO4I for Your System?
This module combines both input and output functions in one unit. It reduces the need for multiple separate modules. This consolidation lowers overall system cost and simplifies your panel layout.
The 1746-FIO4I accepts 0-10 VDC or 0-20 mA signals on its inputs. It provides 0-20 mA signals on its outputs. This flexibility makes it ideal for interfacing with a wide range of sensors and actuators.
Technical Specifications That Matter
The module features a 12-bit input resolution and a 14-bit output resolution. This ensures precise data conversion for accurate process control. Its input conversion time is just 7.5 µs every 512 µs.
This fast conversion allows the module to capture rapid signal changes. The step response is 100 ms for inputs and 2.5 ms for outputs at 95%. This performance is critical for high-speed applications like motion control.
Electrical and Environmental Requirements
The 1746-FIO4I draws 55 mA from the 5V backplane and 150 mA from the 24V backplane. It provides 500V DC backplane isolation for reliable operation. The module operates in a non-condensing humidity range of 5-95%.
Its input channels have a maximum absolute voltage of +/- 7.5V DC. The output channels offer a 21 mA full-scale range with a 5% overrange capability. These specifications ensure robust performance in demanding industrial environments.
Compatibility and Installation
This module fits into a single slot of any SLC 500 chassis. It works with both fixed and modular controller styles. Use shielded Belden 8761 cable with 14 AWG wire for connections.
The module uses an open-type enclosure and mounts directly onto the chassis. An LED indicator light provides quick status feedback. This design simplifies troubleshooting and reduces downtime.
Solving Key Industrial Pain Points
Procurement managers benefit from reduced inventory complexity. One module replaces separate input and output units. This simplifies ordering and stocking processes.
Application engineers gain faster system response times. The module’s 7 KHz bandwidth handles rapidly changing variables. This capability improves process quality and reduces scrap rates.
Step-by-Step User & Installation Guide
Preparing for Installation
First, power down the entire SLC 500 chassis completely. Remove all power sources to ensure safety. Verify that the chassis slot is empty and clean.
Inspect the 1746-FIO4I module for any physical damage. Check that the LED indicator is intact. Ensure the module’s connector pins are straight and clean.
Mounting the Module
Align the module with the desired slot in the chassis. Slide it firmly into the card guide rails. Push until the module seats securely in the backplane connector.
Tighten the top and bottom screws to secure the module. Use a screwdriver for a snug fit. Do not overtighten, as this may damage the module.
Wiring the Input Channels
Use 14 AWG shielded cable for all signal wiring. Strip the wire insulation to the recommended length. Connect the positive signal wire to the appropriate input terminal.
Connect the negative signal wire to the corresponding return terminal. Connect the cable shield to the chassis ground point. This practice reduces electrical noise interference.
Wiring the Output Channels
Identify the output channel terminals on the module. Connect the positive output wire to the load’s positive terminal. Connect the negative output wire to the load’s negative terminal.
Ensure the load resistance is within the 0-500 ohm range. The maximum load reactance is 100 µH. Exceeding these limits may cause signal degradation.
Configuring the Module
Configure the input channels for either voltage or current. Use the software configuration tool for your controller. Select the appropriate signal range for each channel.
Set the output channels to the desired 0-20 mA range. Verify the configuration before starting the system. This prevents unexpected behavior during operation.
Powering Up and Testing
Restore power to the SLC 500 chassis. Observe the LED indicator on the 1746-FIO4I. A steady light indicates normal operation.
Apply a known signal to each input channel. Verify the corresponding reading in your control program. Apply a test value to each output channel. Measure the output current with a meter to confirm accuracy.
Logistics & Standard Packaging Details
- One (1) Allen-Bradley 1746-FIO4I Fast Analog I/O Module
- Product documentation and installation guide
- Module is shipped in an anti-static protective bag
- Express delivery shipping is available via FedEx, UPS, and DHL
