Product Description
The Allen-Bradley 1771-OBN is a 32-point DC output module for the PLC-5 programmable logic controller. It is a high-true module, meaning that the outputs are active when they are turned on. The 1771-OBN is a source output module, which means that it provides the current for the load. It is a Class 1, Division 2, Zone 2 hazardous location approved module.
Product Parameters
- Number of outputs: 32
- Output type: DC voltage
- Output voltage range: 10-30 V
- Output current: 0.5 A per output
- Maximum leakage current: 1 mA per output
- Electrostatic discharge (ESD): 4 kV contact, 8 kV air
Usage Method
The 1771-OBN is installed in a PLC-5 I/O chassis. The I/O chassis provides the power and communication for the module. The 1771-OBN is addressed by the PLC-5 processor. The processor writes to the module’s data table to turn the outputs on and off.
Product Applications
The 1771-OBN is used to control a variety of DC devices, such as solenoid valves, contactors, and relays. It is commonly used in industrial applications, such as manufacturing, process control, and building automation.
Example Applications
- Controlling a solenoid valve to open and close a pneumatic cylinder
- Controlling a contactor to turn on and off a motor
- Controlling a relay to switch between two different circuits
Additional Information
The 1771-OBN was discontinued by Rockwell Automation on December 31, 2015. However, it is still widely used in existing installations. Replacement modules are available from third-party vendors.
Safety Considerations
The 1771-OBN is a high-voltage device. It is important to follow all safety precautions when working with it. Always disconnect the power from the module before making any connections.
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