Technical Specifications for Allen Bradley 1771-OBN
| Item NO. | 1771-OBN | Product Origin | USA |
| Description | Output Modules | Module Location | 1771A1B thru A4B or later I/O Chassis |
| Brand | Allen Bradley | Voltage Rating | 10 to 30V dc |
| Outputs per module | 32 (4 groups of 8) | Maximum Output Current | 0.5A per output |
| Maximum Onstate Voltage Drop | 1.5V dc at 0.5A | Maximum Offstate Leakage Current | 1.0mA @ 55oC |
| Maximum Power Rating | 0.75W per output | Power Dissipation | 13.7W (max); 1.7W (min) |
| Thermal Dissipation | 46.7 BTU/hr (max); 5.7 BTU/hr (min) | Backplane Current | 330mA @ 5V dc maximum |
More Details of Allen Bradley 1771-OBN
More Description: The 1771-OBN plugs directly into the PLC-5 chassis, leveraging the backplane for communication with the processor. Its robust, industrial-grade construction ensures reliable operation in demanding factory environments characterized by electrical noise, temperature fluctuations, and vibrations. Despite the PLC-5 being a legacy platform, the continued availability and reliability of modules like the 1771-OBN are critical for supporting thousands of existing industrial automation systems worldwide, enabling them to maintain critical control functions, perform efficiently, and extend their operational lifespan without costly upgrades. FAQs of Allen Bradley 1771-OBN What type of output does the 1771-OBN provide? The 1771-OBN typically provides sinking (NPN) DC outputs. What voltage and current can the 1771-OBN handle? It operates with a DC voltage range of 10−30V DC. Is the 1771-OBN still manufactured by Rockwell Automation? No, the 1771-OBN, along with the entire PLC-5 platform, has been phased out by Rockwell Automation and is in a "Mature" or "Discontinued" lifecycle phase. How do I wire the 1771-OBN? Connections are made via a specific field wiring arm, typically the 1771-WN. |  |
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Allen Bradley 1771-OBN Feature
Electrical Isolation: Features photo-isolation between the field-side outputs and the PLC backplane logic. This protects the sensitive control circuitry from electrical noise, surges, and faults originating from the field devices. Individual Output Status Indicators: Each output point typically has a dedicated LED indicator on the module's faceplate. These LEDs provide real-time visual feedback on the ON/OFF status of each output, greatly simplifying troubleshooting and field wiring verification. Dedicated Field Wiring Arm Compatibility: Utilizes a specific 1771-WN field wiring arm (or similar fused variants) which simplifies wiring connections to field devices and helps maintain organized cabling within the control cabinet. |
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