Product Overview

The Allen-Bradley 1746-NI16V is an analog input module for the SLC 500 system. This module features 16 voltage input channels for various signal ranges. It accepts ±10V DC, 1-5V DC, 0-5V DC, and 0-10V DC signals. The Allen-Bradley 1746-NI16V uses Sigma-Delta conversion with 16-bit resolution. Users trust this module for precise analog measurement in industrial applications.

Technical Specifications

The 1746-NI16V delivers accurate voltage measurement with flexible filtering. Below are the complete technical details.

General Specifications

• Manufacturer: Rockwell Automation for industrial control reliability.

• Brand: Allen-Bradley premium automation products.

• Part Number: 1746-NI16V for precise identification.

• Series: SLC 500 programmable controller family.

• Module Type: Analog Input Module.

• Number of Inputs: Sixteen (16) voltage input channels.

• Chassis Location: Any I/O module slot except slot 0.

• Slot Usage: Occupies only one slot in the chassis.

Electrical Signal Types

• ±10V DC: Bipolar voltage range.

• 1 to 5V DC: Unipolar with live zero.

• 0 to 5V DC: Standard unipolar range.

• 0 to 10V DC: Extended unipolar range.

• Voltage Category: -10 to +10 Volts DC.

Conversion and Resolution

• Conversion Type: Sigma - Delta for high accuracy.

• Resolution: 16 bits for precise measurement.

• Input Resolution: 312 µV per count.

• Common Mode Voltage Range: ±10.25 Volts relative to analog common terminal.

• Input Impedance: 20 Ω for minimal signal loading.

Input Filtering

• Filter Type: Low-pass digital filter with programmable frequencies.

• Input Filter Frequencies: 6 Hz, 10 Hz, 20 Hz, 40 Hz, 60 Hz, 80 Hz, 100 Hz, 250 Hz.

• Bandwidth: 6-250 Hertz depending on filter selection.

• Step Response: 9-630 milliseconds based on filter setting.

Backplane Current and Power

• Backplane Current (5 Volts): 125 milliamps.

• Backplane Current (24 Volts DC): 75 milliamps.

• Backplane Power Consumption: 2.425 Watts maximum.

• Power at 5V DC: 0.625 Watts.

• Power at 24V DC: 1.8 Watts.

Isolation and Approvals

• Isolation: 500V AC for 1 second between field and logic.

• UL Listed: Yes for safety compliance.

• C-UL Approved: Yes for Canadian standards.

• CE Compliant: For all applicable directives.

• Hazardous Environment: Approved for Class I Division 2 use.

LED Indicators

• Number of LEDs: 5 green status indicators.

• Channel Group Indicators: One LED for each group of 4 channels.

• Module Status: One dedicated LED for module health.

Temperature and Environmental

• Operating Temperature: -25 to 60°C (-13 to 140°F).

• Non-Operating Temperature: -40 to 85°C (-40 to 185°F).

• Relative Humidity: 5% to 95% without condensation.

• Operating Vibration: Standard SLC 500 specifications.

• Operating Shock: Standard SLC 500 specifications.

Drift Specifications

• Gain Drift: 15 ppm per degree Celsius.

• Input Offset Drift: 90 mV per degree Celsius.

• Thermal Stability: Maintains accuracy across temperature range.

Wiring and Termination

• Recommended Cable: Belden #8761 or equivalent.

• Terminal Block: Replaceable terminal with part number 1746-RT25G.

• AIFM Connector: 25-pin D-shell.

• Pre-Wired Cables: Available in 0.5, 1, 2.5, and 5.0 meter lengths.

• Compatible Terminal Blocks: 1492-AIFM8-3 and 1492-AIFM16-F-3.

• Pre-Wired Advantage: Eliminates manual wiring errors with color coding.

Application Suitability

• Primary Application: Combination 120V AC I/O systems.

• Installation: Local chassis or expansion chassis (not slot 0).

• Compatibility: SLC 500 processor via parallel rear-facing interface.

Installation Guide

Follow these steps to install the Allen-Bradley 1746-NI16V correctly.

1. Power Down the Chassis: Disconnect power before removing or inserting modules.

2. Locate an Available Slot: Find any empty slot except slot 0 (reserved for CPU).

3. Align the Module: Position the 1746-NI16V with the slot guides.

4. Insert the Module: Slide it into the slot until firmly seated.

5. Secure the Module: Tighten the mounting screws on the top and bottom.

6. Wire Input Signals: Connect voltage sources to the input terminals.

7. Use Recommended Cable: Belden #8761 or equivalent shielded cable.

8. Terminate Wiring: Use replaceable terminal block 1746-RT25G or pre-wired cables.

9. Select Filter Frequency: Program one of 8 filter settings from 6 to 250 Hz.

10. Apply Power: Turn on the chassis power to the system.

11. Monitor Status LEDs: Check the 5 green indicators for proper operation.

12. Configure Input Ranges: Set each channel for the appropriate voltage range.

13. Verify Readings: Check analog values in the SLC 500 processor.

14. Test Step Response: Measure response time based on selected filter.

Installation Notes

• Do not install this module in slot 0 of the main chassis.

• Removing or inserting a module with power can cause arcing.

• The module occupies only one slot in the chassis.

• Pre-wired cables with 1492 terminal blocks eliminate manual wiring errors.

• This module is approved for Class I Division 2 hazardous environments.

Packaging List

This unit ships as a new and original product.

• Allen-Bradley 1746-NI16V SLC 500 Analog Input Module

• Product data sheet with filter frequency guide

• Installation instructions

• Anti-static factory packaging box

Frequently Asked Questions (FAQ)

1. What voltage input ranges does the 1746-NI16V accept?
The Allen-Bradley 1746-NI16V accepts ±10V DC, 1-5V DC, 0-5V DC, and 0-10V DC. Each of the 16 channels can be configured independently.

2. What filter frequencies are available on this analog input module?
The 1746-NI16V offers 8 programmable filter frequencies: 6, 10, 20, 40, 60, 80, 100, and 250 Hz. Step response varies from 9 to 630 milliseconds accordingly.

3. What is the backplane current consumption for the 1746-NI16V?
The Allen-Bradley 1746-NI16V consumes 125 mA at 5V DC and 75 mA at 24V DC. Total backplane power consumption is 2.425 Watts maximum.

4. Can I install this module in slot 0 of the SLC 500 chassis?
No, the 1746-NI16V can be installed in any I/O module slot except slot 0. Slot 0 is reserved for the SLC 500 controller.

5. What are the temperature and humidity ratings for this module?
The Allen-Bradley 1746-NI16V operates from -25 to 60°C with 5-95% non-condensing humidity. Storage temperature ranges from -40 to 85°C.