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Description
The Allen-Bradley 1746-FIO4I is a high-speed analog combination I/O module engineered for the SLC 500 programmable controller platform. Designed for applications requiring rapid signal processing, this module provides two analog input channels and two analog output channels in a single-slot configuration. The module utilizes successive approximation conversion to achieve high-speed performance, making it suitable for control loops that demand faster response times than standard analog modules can provide.
Features
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High-Speed Conversion: Utilizes successive approximation for a 7.5 microsecond conversion time.
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I/O Configuration: Two configurable voltage/current inputs and two dedicated current output channels.
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High Bandwidth: Features a 7 kHz bandwidth for rapid signal tracking.
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Resolution: Provides 12-bit resolution for inputs and 14-bit resolution for outputs.
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Compatibility: Fully compatible with both fixed and modular SLC 500 chassis systems.
Technical Specifications
| Brand |
Allen-Bradley |
| Product Line |
SLC 500 |
| Module Type |
Fast Analog Combination I/O |
| Input Channels |
2 (Voltage or Current) |
| Output Channels |
2 (Current: 0–20 mA) |
| Input Ranges |
0 to 10V DC or 0 to 20 mA |
| Conversion Method |
Successive Approximation |
| Input Resolution |
12-bit |
| Output Resolution |
14-bit |
| 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
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Power Down: Always remove power from the SLC 500 chassis before inserting or removing the module to prevent electrical damage.
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Slot Placement: The module can be installed in any available I/O slot of a modular SLC 500 chassis.
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Wiring: Use shielded twisted-pair cabling for analog signals to minimize electromagnetic interference (EMI). Ensure the shield is grounded at one end only.
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Handling: Observe standard ESD (Electrostatic Discharge) precautions when handling the module.
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Cooling: Ensure adequate ventilation within the enclosure to maintain the operating temperature within the specified 0 to 60 degC range.
FAQ
What is the primary advantage of the 1746-FIO4I over standard analog modules?
The 1746-FIO4I is designed for high-speed applications. Unlike standard modules that typically use Sigma-Delta conversion, this module uses a successive approximation method, resulting in a significantly faster 7.5 microsecond conversion time and a 7 kHz bandwidth.
Is this module compatible with all SLC 500 systems?
Yes, the 1746-FIO4I is compatible with both fixed and modular SLC 500 hardware platforms.
