PRODUCT INFORMATION
Product Overview
The Allen-Bradley 1746-NI16I SLC 500 I/O Module provides sixteen analog input channels. It converts incoming current signals using a sigma-delta conversion architecture. The unit provides 16-bit resolution across all sixteen input channels. Supported electrical signal types include 0 to 20 mA, 4 to 20 mA, and plus or minus 20 mA. The module also accepts current signals in the 0 to 1 mA range. Input impedance measures 249 ohms for current loops.
Backplane current draw equals 125 mA at 5 Volts DC and 75 mA at 24 Volts DC. Maximum backplane power consumption is 2.425 Watts, while thermal dissipation equals 2.43 Watts. The module fits in any chassis slot except slot 0. Slot 0 is reserved strictly for the modular processor. Five green LED status indicators provide visual diagnostics for the module and channel groups.
TECHNICAL DATA
Technical Specifications
| Parameter | Specification |
|---|
| Applications | Combination 120 Volts AC I/O |
|---|
| Backplane Current | (5 Volts) 125 mA;(24 Volts DC)75 mA |
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| Backplane Current (24 Volts DC) | 75 milliamps |
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| Backplane Current (5 Volts) | 125 milliamps |
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| Bandwidth | 6-250 Hertz |
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| Category | PLCs |
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| Chassis location | Any I/O module slot except slot 0 |
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| Conversion type | Sigma - Delta |
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| Electrical Signal type | 0 to 20 mA, 4 to 20 mA, ±20 mA, and 0 to 1 mA |
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| GTIN | 10611320228196 |
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| Input Filter Frequencies | 6 Hz, 10 Hz, 20 Hz, 40 Hz, 60 Hz, 80 Hz, 100 Hz, 250 Hz |
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| Input Filtering | Low-pass digital filter with programmable filter frequencies |
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| Inputs | Sixteen (16) |
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| Isolation | 500V ac isolation for 1 second |
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| LED Indicators | 5 green status indicators one for each group of 4 channels, and one for module status |
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| Module Type | Analog I/O Module |
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| Recommended Cable | Belden #8761 or equivalent |
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| Step Response | 9-630 milliseconds |
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| Thermal Dissipation | 2.43 Watts |
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| UPC | 10611320228196 |
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| Weight | 1.00 lbs (0.45 kg) |
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TECHNICAL INFORMATION
Features
- Provides sixteen analog current input channels with 16-bit resolution.
- Uses sigma-delta analog-to-digital conversion with programmable low-pass digital filtering.
- Supports input signal ranges including 0 to 20 mA, 4 to 20 mA, and plus or minus 20 mA.
- Features five green LED indicators to show module status and channel group operation.
- Offers selectable data formats such as Engineering Units and Scaled for PID.
- Includes open-circuit detection capability for the input channels.
TECHNICAL INFORMATION
Applications
- Analog process variable acquisition in SLC 500 modular automation racks.
- Feedback monitoring for closed-loop Proportional-Integral-Derivative control loops.
- Current loop signal measurement from field transmitters and industrial sensors.
TECHNICAL INFORMATION
Connections / Interfaces
- Connects using a removable terminal block or an external 25-pin D-shell AIFM connector.
- Accepts wire sizes up to 14 AWG at each terminal point.
- Accommodates up to two conductors per terminal point.
- Recommended wiring uses Belden #8761 shielded cable or an equivalent conductor.
TECHNICAL INFORMATION
Installation Guidelines
- Mount the module in any SLC 500 chassis slot except slot 0.
- Slot 0 must remain reserved for the system processor.
- It is not necessary to remove terminal blocks when inserting the module into a chassis.
- If removed, identify the module position using the label beside the terminal block.
TECHNICAL INFORMATION
Configuration Guidelines
- Select digital filter frequencies ranging from 6 Hz up to 250 Hz.
- Configure data formats including Engineering Units or Scaled for PID.
- Proportional Counts format supports standard or user-defined ranges.
TECHNICAL INFORMATION
Compatibility
- Compatible with Allen-Bradley SLC 500 modular chassis systems.
COMPATIBILITY
Compatibility & Replacement
COMPATIBLE MODELSCompatible with Allen-Bradley SLC 500 modular chassis systems.
Verify compatibility against the exact Part Number, revision and manufacturer documentation before ordering.
PART VERIFICATION
Before You Order
Industrial automation parts can share similar model names, suffixes and revisions. Confirm the complete manufacturer Part Number before purchase.
01Check Part NumberMatch the complete ordering code on the existing unit.
02Confirm RevisionCheck suffix, hardware or firmware when applicable.
03Send a Label PhotoWe can review a clear label photo when identification is uncertain.
ORDERING PROCESS
From RFQ to Dispatch
1Submit Part Number2Verify Product Identity3Confirm Stock & Condition4Issue Quotation5Dispatch & Tracking
PRODUCT FAQ
Frequently Asked Questions
Which chassis slots accept the Allen-Bradley 1746-NI16I module?
The module mounts in any SLC 500 chassis slot except slot 0. Slot 0 is reserved for processors.
What electrical signal types does the 1746-NI16I measure?
It accepts 0 to 20 mA, 4 to 20 mA, plus or minus 20 mA, and 0 to 1 mA.
What cable is recommended for wiring to the 1746-NI16I?
Belden #8761 shielded cable or an equivalent conductor is recommended for signal wiring.
