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Description
Technical Specifications
| Parameter Name | Value |
|---|---|
| Product Model | 1746-FIO4V |
| Manufacturer | Allen-Bradley / Rockwell Automation |
| Product Type | SLC 500 Fast Analog Combination Module |
| Input Channels | 2 (Differential, Voltage or Current, Selectable per Channel) -3 |
| Output Channels | 2 (Voltage Outputs, Grouped, Not Individually Isolated) -3 |
| Input A/D Converter Resolution | 12 bits -4 |
| Output D/A Converter Resolution | 14 bits -4 |
| Input Signal Range (Voltage) | 0 to 10V DC (max) -3 |
| Input Signal Range (Current) | 0 to 20 mA (nominal); 0 to 30 mA (max) -2-3 |
| Output Signal Range | -10 to +10V DC – 1 LSB -2 |
| Backplane Current Draw (5V DC) | 55 mA -3 |
| Backplane Current Draw (24V DC) | 120 mA -3 |
| Module ID Code | 3218 -12 |
| Step Response (Input, 5-95%) | 100 µs -3 |
| Step Response (Output, to 95%) | 2.5 ms (normal) -3-6 |
| Input Bandwidth | 7.0 kHz (min @ 3 dB point) -3 |
| Input Impedance (Voltage) | 1 MΩ (nom) -3 |
| Input Impedance (Current) | 250 Ω (nom) -3 |
| Isolation (Field Wiring to Backplane) | 500V DC -2-3 |
| Operating Temperature | 0 to 60 °C (32 to 140 °F) -3 |
| Storage Temperature | -40 to 85 °C (-40 to 185 °F) -3 |
| Relative Humidity | 5 to 95% (non-condensing) -2-3 |
| Recommended Cable | Shielded, Belden #8761 -3 |
| Wire Size | 2.5 mm² (14 AWG) max -3 |
| Calibration | Recommended every six months or as necessary -3 |
Main Features and Advantages
Exceptional Speed and Performance: The 1746-FIO4V is engineered for applications demanding rapid response times. Its analog inputs feature a fast 100 µs step response (5-95%) and a 7 kHz bandwidth, capable of capturing dynamic process changes that standard analog modules cannot track -3. The module’s 512 µs typical update time ensures that real-time data is promptly available to the SLC 500 processor for timely control decisions -2-3. This high-speed performance makes the 1746-FIO4V indispensable for precision applications such as flow control, pressure regulation, and high-speed web processing.
Flexible Input Configuration: The two input channels of the 1746-FIO4V offer exceptional versatility, as each channel can be independently configured for either voltage or current input via a simple two-switch assembly on the circuit board -4-12. This flexibility allows the same module to interface with voltage-generating sensors, such as potentiometers, and current-loop devices like 4-20 mA pressure transmitters simultaneously, simplifying system design and reducing the number of required modules. The ability to support a 4-20 mA current loop standard ensures compatibility with the majority of modern industrial sensors -2-10.
Robust Output Control: The 1746-FIO4V provides high-resolution 14-bit voltage outputs with a bipolar -10 to +10V DC range, suitable for driving a wide array of final control elements -2-6. Its fast 2.5 ms step response ensures that control output changes are executed with minimal delay, maintaining tight process control -3-6. The output channels can drive loads from 1 kΩ to infinity, with a maximum load current of 10 mA, providing compatibility with most industrial actuators and variable frequency drives -6.
Compact and Integrated Design: As a single-slot module for the 1746 I/O chassis, the 1746-FIO4V provides a highly efficient combination of two fast inputs and two outputs -3-8. This integration significantly reduces the physical footprint and power consumption compared to using separate input and output modules, resulting in substantial savings in panel space, rack slots, and overall system cost. Its removable terminal block simplifies wiring and maintenance, and the module is designed for easy installation and configuration within the SLC 500 environment -3-12.
Application Fields
The 1746-FIO4V is the ideal choice for a broad range of industrial automation applications where high-speed analog processing and space efficiency are critical. Its ability to handle rapidly changing inputs and provide precise outputs makes it particularly well-suited for demanding control loops in various industries. In the manufacturing and production sector, the 1746-FIO4V is commonly used for closed-loop speed control of variable frequency drives, pressure control in hydraulic systems, and precise tension control in web handling and converting applications -2-10.
The process industries, including oil and gas, chemical, and water and wastewater treatment, benefit from the module’s high-speed response for flow totalization and control, as well as for managing pressure and level control loops where process variables can change quickly -2-10. In the packaging industry, the 1746-FIO4V can be deployed for high-speed filling operations and label registration, where its fast input capture and output response ensure accuracy and throughput. Furthermore, its legacy status within the SLC 500 platform makes the 1746-FIO4V a critical spare part for maintaining and extending the operational life of countless existing automation systems in power generation, material handling, and food and beverage processing facilities, ensuring continued productivity while managing capital costs effectively -10.
