Purchase now the 2080-OB4, a high-efficiency 4-channel digital sourcing output plug-in module designed to expand the control capabilities of Allen-Bradley Micro800 controllers. This compact hardware addition allows machine builders to increase the number of discrete actuators managed by a single PLC without expanding the DIN rail footprint.
What Is the 2080-OB4?
The 2080-OB4 is a digital transistor output module belonging to the Micro800 Plug-in family. Compatible with Micro810, Micro820, Micro830, Micro850, and Micro870 controllers, it provides four additional sourcing (PNP) outputs. Sourcing outputs are the industrial standard for safety in many regions, as they provide positive voltage to the load, ensuring that a wire short-to-ground will not accidentally energize the field device. The plug-in architecture is a hallmark of the Micro800 series, allowing for a «right-sized» approach to I/O where users can add exactly what they need in the available front-facing slots of the controller. The 2080-OB4 is ideal for switching small solenoids, indicator lights, and interposing relays in automated assembly lines and specialized OEM machinery.
Key Technical Specifications
- Number of Outputs: 4 Sourcing (PNP)
- Operating Voltage: 12/24V DC
- Operating Voltage Range: 10V DC to 30V DC
- Output Current: 0.5A per point (2A max per module)
- On-State Voltage Drop: 1.0V DC maximum
- Off-State Leakage: 0.5mA maximum
- Power Consumption: 3.3V (15mA), 24V (20mA)
- Isolation: Optical isolation between field and logic
Architecture and System Versatility
The 2080-OB4 utilizes the high-speed internal bus of the Micro800 series, ensuring rapid response times for time-critical automation tasks. In a typical architecture, this plug-in module is identified by the controller firmware upon insertion and configured via the Connected Components Workbench (CCW) software. Because it does not require an expansion base, it maintains the ultra-compact form factor of the Micro800 line. This makes it particularly effective for decentralized control panels where cabinet space is at a premium. The sourcing transistor design ensures zero mechanical wear, providing a much longer service life compared to traditional relay-based outputs in high-frequency switching applications.
Installation Advice
When installing the 2080-OB4, always ensure the PLC is powered off to protect the delicate gold-plated backplane pins. For inductive loads such as DC solenoid valves, it is mandatory to install a flyback diode in parallel with the load to suppress inductive voltage spikes. Without this protection, the internal sourcing transistors may experience thermal stress over time, potentially leading to premature channel failure. Also, verify that the total current draw for the four channels does not exceed the 2A module limit, especially if the PLC is operating at the upper limit of its temperature range.
Frequently Asked Questions
Q: Can the 2080-OB4 be used for Pulse Width Modulation (PWM)?
A: No, the 2080-OB4 is designed for general-purpose discrete switching. For high-speed PWM or PTO tasks, you must use the embedded high-speed outputs on the Micro800 base unit.
Q: Is each output channel independently isolated?
A: No, the 2080-OB4 provides isolation between the field-side circuitry and the PLC logic bus, but the four output channels share a common return.
Do you need more references from this brand? Explore our full catalog of Allen-Bradley here: https://atlantechdrives.com/manufacturers/allen-bradley/
