Description
Description
The Allen-Bradley 1746-NI16V is a high-density analog input module engineered for the SLC 500 programmable controller platform. This module provides sixteen (16) single-ended voltage input channels, organized into four groups of four, allowing for efficient integration of various industrial sensors such as potentiometers, pressure transducers, and analytical instrumentation providing DC voltage outputs.
Features
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High-Density I/O: Provides 16 voltage-type analog inputs in a single-slot module.
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Signal Conditioning: Employs Sigma-Delta conversion for high-resolution 16-bit digital representation of analog signals.
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Programmable Filtering: Features a user-selectable low-pass digital filter with eight frequency settings (6 Hz to 250 Hz) to balance signal stability against step response time.
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Flexible Input Ranges: Supports multiple standard DC voltage ranges including ±10V, 0–10V, 0–5V, and 1–5V.
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Robust Isolation: Rated for 500V AC isolation for 1 second to protect against backplane noise and transients.
Technical Specifications
| Parameter |
Specification |
| Brand |
Allen-Bradley |
| Product Line |
SLC 500 |
| Number of Inputs |
16 (4 groups of 4) |
| Input Ranges |
±10V DC, 0–10V DC, 0–5V DC, 1–5V DC |
| Resolution |
16-bit |
| Conversion Type |
Sigma-Delta |
| Backplane Current (5V) |
125 mA |
| Backplane Current (24V) |
75 mA |
| Bandwidth |
6 Hz to 250 Hz |
| Step Response |
9 ms to 630 ms (Programmable) |
| 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 installing or removing the module to prevent electrical damage.
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Slot Placement: The 1746-NI16V can be placed in any I/O slot of an SLC 500 chassis; however, ensure the power supply can accommodate the additional backplane current draw (125 mA at 5V, 75 mA at 24V).
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Wiring: Use shielded twisted-pair cabling for analog signal connections to minimize EMI/RFI interference. Ground the shield at one end only to prevent ground loops.
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Handling: Observe standard ESD precautions when handling the module to prevent damage to internal circuitry.
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Environment: Ensure the module is installed in an enclosure rated for the operating environment, maintaining an ambient temperature between 0 and 60 degC.
FAQ
What is the primary function of the 1746-NI16V?
This module is designed to convert analog voltage signals from field devices into digital values that can be processed by the SLC 500 controller, facilitating high-density data acquisition.
Can I mix different voltage ranges on the same module?
Yes, the module supports multiple ranges (±10V, 0–10V, 0–5V, 1–5V), and these can be configured on a per-channel basis via the programming software.
How do I manage electrical noise on my analog signals?
The module includes a programmable low-pass digital filter. You can select from eight different filter frequencies to effectively suppress noise based on your specific application requirements.
