PRODUCT INFORMATION
Product Overview
The Allen-Bradley 1746SC-INO4I SLC 500 Analog Output Module is manufactured by Encompass partner Spectrum Controls. It occupies a single slot within an Allen-Bradley 1746 I/O chassis. The module delivers four isolated analog current output channels. Supported output ranges include 0 to 20 mA, 0 to 21 mA, and 4 to 20 mA. Each channel features 16-bit resolution providing 366 nA per count. Optoelectrical isolation protects channels and backplane circuits from noise crosstalk.
Power can be supplied from the backplane or through an external 24 VDC power source. A physical DIP switch selects between backplane power and external power operation. Setting the switch to RACK draws operating power directly from the backplane. Setting the switch to EXT draws current from an external supply. The module draws 120 mA at 5 VDC. Field wiring connects through a removable 16-position terminal block designed for Belden 8761 shielded cable. The module also features auto-calibration routines, programmable limits, and user-defined safe states.
TECHNICAL DATA
Technical Specifications
| Parameter | Specification |
|---|
| Weight | 1.50 lbs (0.68 kg) |
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| Channels | 4 |
|---|
| No. of Outputs | Four (4), Isolated |
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| Input Type | Analog Isolated Current |
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| Output Current range | 0-20 mA, 0-21 mA, 4-20 mA |
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| Input Current | 0-20 mA |
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| Resolution | 16 bits |
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| Input Voltage | 0-5V |
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| Step Response | 1 ms to 95% of full scale |
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| Full Scale Output | 21 mA |
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| Electrical Isolation | Field wiring to backplane: 500 VAC continuous Channel-to-channel isolation: 500 VAC continuous |
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| Output Impedance | >1 Mohm |
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| Maximum Resistance | 500 Mohm |
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| Ambient Operating Temperature | 0 to 60 degrees Celsius |
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| Backplane Current Required | 120 mA at 5 V; 250 mA at 24 V |
|---|
| Thermal Dissipation | 5 Watts, maximum |
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TECHNICAL INFORMATION
Features
- Four individually isolated analog current output channels.
- Selectable current output ranges of 0 to 20 mA, 0 to 21 mA, and 4 to 20 mA.
- Resolution of 16 bits providing 366 nA per count sensitivity.
- DIP switch selection for chassis backplane or external 24 VDC power supply.
- Optoelectrical isolation rated for channel-to-channel and field-wiring-to-backplane protection.
- Data formatting in 16-bit Two's complement, Scaled Engineering Units, Scaled for PID, and 1746-NO4 format.
- Removable 16-position terminal block accommodating Belden 8761 shielded twisted-pair cable.
TECHNICAL INFORMATION
Applications
- Isolated analog current output generation in SLC 500 systems.
- Current loop signaling requiring channel-to-channel electrical isolation.
TECHNICAL INFORMATION
Connections / Interfaces
- Removable 16-position terminal block on the front of the module.
- Standard 1746 chassis backplane interface.
- Terminal block wiring accommodates Belden 8761 shielded twisted-pair cable.
TECHNICAL INFORMATION
Installation Guidelines
- Insert the module into any available slot in a 1746 chassis.
- Set the DIP switch to RACK or EXT before installing the module.
- Disconnect chassis power prior to module insertion or removal.
- Use Belden 8761 shielded twisted-pair cabling for field terminations.
TECHNICAL INFORMATION
Configuration Guidelines
- Select data formatting such as Scaled Engineering Units, Scaled for PID, or Two's complement.
- Configure programmable upper limits, lower limits, and safe state values per channel.
TECHNICAL INFORMATION
Compatibility
- Installs in standard Allen-Bradley SLC 500 1746 I/O chassis.
TECHNICAL INFORMATION
Lifecycle / Replacement Information
- Manufactured by Spectrum Controls under the Allen-Bradley Encompass partner program.
TECHNICAL INFORMATION
Compliance and Certifications
- UL Class I, Division 2, Groups A, B, C, D
- cUL certified
- CE certified
COMPATIBILITY
Compatibility & Replacement
COMPATIBLE MODELSInstalls in standard Allen-Bradley SLC 500 1746 I/O chassis.
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
What is the primary function of the 1746SC-INO4I module?
The module provides four isolated analog current output channels for SLC 500 systems.
What output current ranges does the 1746SC-INO4I provide?
It supports selectable output ranges of 0 to 20 mA, 0 to 21 mA, and 4 to 20 mA.
How is power supplied to the 1746SC-INO4I module?
An onboard DIP switch selects between 1746 backplane power and an external 24 VDC power supply.
What field cable is specified for the 1746SC-INO4I terminal block?
The removable 16-position terminal block accommodates Belden 8761 shielded twisted-pair cable.
