PRODUCT INFORMATION
Product Overview
The Allen-Bradley 1771-AF1 is a PLC-5 Fiber Optic Converter Module. It converts Data Highway Plus (DH+) and Remote I/O (RIO) communications to optical signals. The unit provides two fiber-optic ports and two electrical DH+ or RIO ports. It supports a maximum transmission distance of up to 30,000 feet.
This hardware installs in one slot of a 1771 I/O chassis. It also supports stand-alone mounting using dedicated mounting slots. Stand-alone deployment requires an external 5 VDC power supply drawing 600 mA of current. Chassis installation draws 1.0 A of backplane current at 5 VDC. Total module power dissipation is 5 Watts, generating 17.06 BTU/hr of thermal dissipation.
TECHNICAL DATA
Technical Specifications
| Parameter | Specification |
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| Category | PLCs |
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| Product Line | PLC 5 |
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| GTIN | 10612598001146 |
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| Weight | 1.75 lbs (0.79 kg) |
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| Module Type | Fiber-Optic Converter Module |
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| Location | Stand-Alone |
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| Product Description | Fiber Optic converted module |
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| Current Load | 600 Miliamperes |
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| Required Slot(s) | 1 Slot of 1771 I/O Chassis |
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| No. of Fiber ports | Two (2) Fiber ports |
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| Power Dissipation | 5 Watts |
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| Supported protocols | Data Highway Plus (DH+); Remote I/O (RIO) |
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| Backplane Current (at 5 Volts) | 1.0 Amperes |
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| No. of ports | Two (2) DH+ / RIO ports |
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| Thermal Dissipation | 17.06 BTU/hr |
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| Power supply | 5VDC |
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| Cable | Coaxial Quad-Shield RG-6 |
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| Input current | 600 mA |
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| Upper Connector Keying | 54-56 |
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| Mounting | Stand-alone; via mounting slots |
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| Lower Connector Keying | 16-18 |
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| Maximum conversion distance | 30,000 ft. |
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| Operating temperature | -25 to +70 degrees Celsius |
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| Storage temperature | -25 to +85 degrees Celsius |
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| Enclosure | NEMA type 12 |
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| Communication cable | Belden 9463; 1770-CD |
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TECHNICAL INFORMATION
Features
- Converts electrical Data Highway Plus and Remote I/O signals into optical transmissions.
- Features two fiber-optic ports and two DH+ or RIO network ports.
- Achieves a maximum signal transmission distance of 30,000 feet.
- Operates as a stand-alone unit or inside a 1771 I/O chassis slot.
- Dissipates 5 Watts of power with 17.06 BTU/hr thermal output.
- Withstands operating temperatures from -25 to +70 degrees Celsius.
TECHNICAL INFORMATION
Applications
- Extending Data Highway Plus network links over distances up to 30,000 feet.
- Long-distance Remote I/O communication links across industrial automation facilities.
- Connecting distributed PLC-5 chassis across extended optical communication runs.
TECHNICAL INFORMATION
Connections / Interfaces
- Two optical fiber communication ports.
- Two electrical ports for DH+ or Remote I/O wiring.
- External 5 VDC power input terminals for stand-alone mounting.
- Backplane connector with keying positions 54-56 upper and 16-18 lower.
TECHNICAL INFORMATION
Installation Guidelines
- Mount the unit stand-alone via mounting slots or insert it into a 1771 chassis.
- Set chassis backplane keying bands to positions 54-56 and 16-18 before insertion.
- Connect an external 5 VDC 600 mA power source when operating stand-alone.
- Use compatible Belden 9463, 1770-CD, or Quad-Shield RG-6 communication cabling.
TECHNICAL INFORMATION
Configuration Guidelines
- Configure the device for either Data Highway Plus or Remote I/O communication protocols.
- Ensure connected optical cable runs do not exceed the 30,000-foot conversion limit.
TECHNICAL INFORMATION
Compatibility
- Allen-Bradley PLC-5 control systems.
- Standard Allen-Bradley 1771 I/O chassis assemblies.
- Belden 9463 and 1770-CD communication cables.
- Coaxial Quad-Shield RG-6 cabling.
TECHNICAL INFORMATION
Lifecycle / Replacement Information
- Legacy communication component within the Allen-Bradley PLC-5 system architecture.
- Maintained for spare parts inventory and support of operational 1771 installations.
TECHNICAL INFORMATION
Compliance and Certifications
- NEMA Type 12 enclosure rating.
TECHNICAL RESOURCES
Documentation
COMPATIBILITY
Compatibility & Replacement
COMPATIBLE MODELSAllen-Bradley PLC-5 control systems. Standard Allen-Bradley 1771 I/O chassis assemblies. Belden 9463 and 1770-CD communication cables. Coaxial Quad-Shield RG-6 cabling.
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 protocols does the Allen-Bradley 1771-AF1 support?
The module supports Data Highway Plus (DH+) and Remote I/O (RIO) communication protocol conversion.
What is the maximum transmission distance for the 1771-AF1?
The module transmits signals over optical fiber cabling up to a maximum distance of 30,000 feet.
How is the 1771-AF1 powered during stand-alone mounting?
Stand-alone installations require an external 5 VDC power supply delivering 600 mA of current.
What is the market reference price for the 1771-AF1?
Observed market reference pricing is approximately $389 USD. This value is an indicative market reference price only and is not a final quotation.
