Features:
- Interface Between the DC Output Control System and Industrial Field Devices
- Combines Capability of High-Density Output Switching with Remote I/O Integration
- Operates in Conjunction with Allen-Bradley PLC Systems and Universal RIO Networks
The Allen-Bradley 1791-OB16 functions as a DC Output Block I/O module in distributed control architectures, delivering reliable 24 VDC switching capability to field-mounted actuators and indicators. It continuously manages 16 discrete output channels (10-30 VDC range) and transmits status data through the Universal Remote I/O link to support real-time control of solenoids, motor starters, and status lights. Seamless communication is standard with the 1791-OB16, however utilizing its compact block I/O design will allow significant reduction in wiring runs back to central control cabinets. The 1791-OB16 has established a versatile footprint in industrial automation by incorporating flexible mounting orientations and robust electrical isolation within distributed I/O networks.
The 1791-OB16 provides essential output functions common to remote I/O stations, and is a critical component of the control execution path, directly affecting the proper, normal operation of field-level automation processes. One or multiple 1791-OB16 modules are deployable per remote I/O station depending on the required output density. The 1791-OB16 occupies a compact block form factor in the installation and is typically mounted in proximity to the controlled equipment to minimize field wiring lengths.
For High-Current Output applications, the 1791-OB16 module delivers 500 mA per channel in vertical orientation (250 mA horizontal), accommodating demanding load requirements. In addition to standard discrete output operation, the 1791-OB16 configuration also maintains minimal leakage current. The 1791-OB16 output circuitry executes switching using the solid-state design specified in the module specifications. Using this method, the output system continually maintains a minimum on-state current of 1.0 mA per channel. If the system detects output status changes, it will automatically update the RIO link communication and reflect the current state in the PLC processor data table.
The 1791-OB16 Allen-Bradley DC Output Block I/O Module may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).
Allen-Bradley 1791-OB16 DC Output Block I/O Module Manuals,Datasheets,Link
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
Allen-Bradley 1791-OB16 DC Output Block I/O Module Specs
General
- Manufacturer Allen-Bradley
- Model 1791-OB16
- Condition New Original ready stock
- Product Family 1791-0B16,1794-OB16,1794-OB16P,1794-OB16D
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
- Remote I/O Expansion: Used to extend a PLC system's control to remote locations without requiring a full I/O rack or local power supply.
- Discrete Device Control: Ideal for driving low-power 24V DC devices such as: Solenoids and actuators.Pilot lights and status indicators.Small DC relays or motor starters.
- Distributed Control Systems: It can serve as a standalone I/O solution or part of a larger Universal Remote I/O (RIO) network for PLC-5 or SLC 500 controllers.
- Temperature: Operating range of 0°C to 60°C (32°F to 140°F).
- Vertical Mounting: Maximum output current of 500 mA per point.
- Horizontal Mounting: Derated to 250 mA per point to ensure proper heat dissipation.
- Ventilation: Requires a minimum 2.0-inch (50.8 mm) clearance on all sides for airflow.
- Protection: Rated for Pollution Degree 2 industrial environments; must be installed within a protective enclosure.
- Electrical Isolation: Provides 500V AC isolation to protect internal logic from field-side electrical noise.
- Hazardous Locations: Suitable for Class I, Division 2, Groups A, B, C, and D hazardous environments (non-incendive rating).
- Grounding: Includes a dedicated grounding stud; must be properly torqued to 15 in-lbs to maintain safety standards.
- Protection: External fusing is recommended for all outputs to prevent damage from short circuits or overcurrent.