PRODUCT INFORMATION
Product Overview
The Allen-Bradley 1791-OB16 is a 16-point DC output I/O module in the Block I/O 1791 series. It interfaces directly across the Universal Remote I/O link to support distributed automation architectures. The unit operates with a nominal 24 VDC output rating and supports a 10 to 30 VDC span. External DC power for the unit requires an input supply between 19.2 and 30 VDC.
Current delivery depends directly on physical mounting orientation. In a vertical orientation, the module delivers up to 500 mA per output point. In a horizontal orientation, maximum output current is restricted to 250 mA per point. Each output maintains a minimum on-state current of 1.0 mA. Maximum off-state leakage current is 0.5 mA, and isolation voltage reaches 500V AC. The hardware operates in ambient industrial environments from 0°C to 60°C.
TECHNICAL DATA
Technical Specifications
| Parameter | Specification |
|---|
| Weight | 1.13 lbs (0.51 kg) |
|---|
| Number of Outputs | 16 Outputs |
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| Nominal Output Voltage | 24 VDC |
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| Output Voltage Range | 10–30V DC |
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| External DC Power Range | 19.2–30V DC |
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| Max. Output Current (Vertical) | 500 mA |
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| Max. Output Current (Horizontal) | 250 mA |
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| Min. On-State Current | 1.0 mA per Output |
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| Max. Off-State Leakage Current | 0.5 mA |
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| Isolation Voltage | 500V AC |
|---|
| Communication Link | Universal Remote I/O (RIO) |
|---|
| Operating Temperature | 0°C to 60°C |
|---|
TECHNICAL INFORMATION
Features
- Sixteen DC outputs operating across an output voltage range of 10 to 30 VDC.
- Communication via the standard Universal Remote I/O (RIO) network link.
- Orientation-dependent current ratings providing 500 mA vertically and 250 mA horizontally.
- 500V AC isolation voltage rating protecting internal circuitry from electrical noise.
- Low off-state leakage current rating of 0.5 mA per output channel.
- Wide ambient operating temperature tolerance from 0°C to 60°C.
TECHNICAL INFORMATION
Applications
- Distributed DC field actuation within Universal Remote I/O industrial control architectures.
- Discrete industrial control systems requiring remote solid-state 24 VDC switching.
TECHNICAL INFORMATION
Connections / Interfaces
- Universal Remote I/O (RIO) network communication interface.
- Sixteen discrete DC output terminal points.
- External DC power supply connections rated for 19.2 to 30 VDC.
TECHNICAL INFORMATION
Installation Guidelines
- Mount the module vertically to achieve the full 500 mA output current capacity.
- Derate maximum output current to 250 mA per point when mounting horizontally.
- Ensure supply voltage remains within the specified 19.2 to 30 VDC external range.
- Maintain ambient operating temperatures between 0°C and 60°C inside the enclosure.
TECHNICAL INFORMATION
Compatibility
- Compatible with Allen-Bradley Universal Remote I/O (RIO) scanners and communication networks.
COMPATIBILITY
Compatibility & Replacement
COMPATIBLE MODELSCompatible with Allen-Bradley Universal Remote I/O (RIO) scanners and communication networks.
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 communication protocol is used by the Allen-Bradley 1791-OB16?
The module communicates with host controllers over the Allen-Bradley Universal Remote I/O (RIO) link.
How does mounting orientation affect the output current of the 1791-OB16?
Vertical mounting supports 500 mA per point. Horizontal mounting restricts output current to 250 mA per point.
What is the external power supply requirement for the 1791-OB16?
The module requires an external DC power supply operating between 19.2 and 30 VDC.
What is the isolation rating of the 1791-OB16 module?
The 1791-OB16 features an isolation voltage rating of 500V AC.
