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Brand: Allen-Bradley
Allen-Bradley 2080-IQ4OB4 8-Point Combo DC Plug-in
Description
Four inputs and four source outputs in one Micro800 plug-in
The Allen-Bradley 2080-IQ4OB4 is an 8-point combination plug-in: four 12/24V DC sink or source inputs and four 12/24V DC source (positive switching) transistor outputs. It lets a Micro800 controller gain eight extra points without a separate expansion module.
Inputs are IEC type 3 compatible and each of the eight points has a yellow status indicator. The manual groups this module with the 2080-IQ4OV4, which has the same inputs but sinking outputs, so check the output polarity of the field devices before ordering.
Technical specifications
| Parameter | Specification |
|---|---|
| Number of I/O | 4 channel inputs/source outputs combination |
| Number of digital inputs | 4 |
| Number of digital outputs | 4 |
| Type of voltage (input voltage) | AC/DC |
| IEC input compatibility | Type 3 |
| On-state voltage, min | 9.0V DC @ 10.25V AC (rms) |
| ON-state voltage, max | 30V DC @ 30V AC (rms) |
| On-state current, min | 2.0mA @ 9V DC, 2.0mA @ 9V AC (rms) |
| On-state current, nom | 3.0mA @ 24V DC |
| ON-state current, max | 5 mA |
| Off-state voltage, max | 5V DC @ 3.5V AC (rms) |
| Off-state current, max | 1.5 mA |
| Off-state leakage current, max | 10 µA |
| Input filter time | ON to OFF: 8…10 ms AC/DC |
| Input impedance | 0…3V, over 4 KΩ, 3…12V, 3.5 KΩ minimum, 12…30V, over 4 KΩ under 10 KΩ |
| Type of digital output | Transistor |
| On-state voltage, output | 24V DC nominal |
| Output current per point | Steady state: 0.5 A maximum |
| Power supply voltage | 10.8V DC, minimum, 30V DC, maximum |
| Isolation voltage | 50V (continuous), basic insulation type, inputs to outputs, I/Os to backplane type tested for 60 s @ 720V DC, I/Os to backplane |
| Status indicator | 8 yellow |
| Wire size | 0.2… 2.5 mm2 (24…12 AWG) solid or stranded copper wire rated @ 90 °C (194 °F), or greater, insulation maximum |
| Operating temperature | -20 to 65 °C |
Wiring and polarity
On the input side the nominal on-state current is 3.0 mA at 24V DC, the threshold is 9V DC minimum, and the maximum on-state voltage is 30V DC. The outputs are transistor sources rated for 24V DC nominal and a steady-state 0.5 A per point, powered from a 10.8 to 30V DC supply connected to the module.
Rockwell lists 50V continuous basic insulation between inputs, outputs and the backplane. This is not a relay module, so contactor coils, solenoids and signal lamps should be checked against the 0.5 A per-point limit and, for inductive loads, a suppressor diode may be needed.
Where it fits in a Micro800 build
Compared with the 4-input 2080-IQ4 and the 4-output 2080-OB4, this combination module spends one plug-in slot on both functions. On a Micro820 with two slots, that can leave the second slot free for an analog or serial module.
The manual lists plug-in slot counts of 2 for Micro820, 2, 3 or 5 for Micro830 (10/16, 24 and 48 point), 3 or 5 for Micro850 (24 and 48 point) and 3 for Micro870, while Micro810 has none.
Ordering and documents
Order 2080-IQ4OB4 exactly as printed. The hosted document is the 2080-UM004F plug-in modules user manual, and the photo is the official Rockwell product photograph of this module. See more automation parts in the PLC & I/O Cards category.
Seven Star LLC is an independent supplier in Muscat and quotes on request. Please confirm the catalog number, ratings and the current product status against the latest Rockwell Automation documents before ordering.
Datasheets & Documents
- User manual Micro800 Plug-in Modules User Manual (2080-UM004F-EN-E, February 2026) Download
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About brand
Allen-Bradley is the brand of Rockwell Automation for industrial control: ControlLogix and CompactLogix controllers, I/O systems, PanelView operator terminals, PowerFlex drives, motor control and industrial network equipment. The company began in Milwaukee in 1903, when Lynde Bradley and Dr. Stanton Allen formed the Compression Rheostat Company to make the motor speed controller Bradley had invented in 1901. It took the name Allen-Bradley in 1909 and was bought by Rockwell International in 1985. Since 2001 its owner has been Rockwell Automation, which is still headquartered in Milwaukee, Wisconsin.
Allen-Bradley company profile
| Founded | 1903, Milwaukee, Wisconsin, USA, as the Compression Rheostat Company |
|---|---|
| Founders | Lynde Bradley (inventor of the compression rheostat, 1901) and Dr. Stanton Allen (investor); Harry Bradley joined in 1904 |
| Name | Allen-Bradley Company from 1909 |
| Ownership | Acquired by Rockwell International in 1985 for about USD 1.65 billion; a brand of Rockwell Automation (NYSE: ROK) since 2001 |
| Headquarters | Milwaukee, Wisconsin, USA |
| Product families | Logix programmable automation controllers (ControlLogix, CompactLogix), legacy SLC 500 and MicroLogix PLCs, Micro800 controllers, POINT, FLEX and Compact I/O, PanelView HMIs, PowerFlex AC drives, contactors, motor starters and soft starters, safety components, Stratix Ethernet switches |
Milestones
- 1901: Lynde Bradley invents the compression rheostat to control the speed of electric motors.
- 1903: The Compression Rheostat Company is formed in Milwaukee with an initial investment of USD 1,000.
- 1904: Harry Bradley joins; a crane controller is shown at the St. Louis World's Fair.
- 1909: The company is renamed Allen-Bradley.
- 1985: Rockwell International acquires Allen-Bradley.
- 2001: Rockwell Automation becomes the company's name; the Allen-Bradley brand marks 100 years in 2003.
Reading Allen-Bradley catalogue numbers
The first digits of an Allen-Bradley catalogue number identify the platform, which tells you what is compatible with what. 1756 is ControlLogix (chassis-based, used for large process and plant control), 1769 is CompactLogix 5370 with Compact I/O, 5069 is CompactLogix 5380 with Compact 5000 I/O, 1734 is POINT I/O, 1794 and 5094 are FLEX and FLEX 5000 distributed I/O, 1746 and 1747 belong to the older SLC 500 family, 1766 is MicroLogix 1400 and 2080 is Micro800. For drives, 25B is PowerFlex 525 and 22B is PowerFlex 40; in a code such as 25B-D010N114, "D" means 380–480 V, "010" is the output current rating, and N114 instead of N104 means the drive has an integrated EMC filter. Many plants in the region still run SLC 500 and older MicroLogix systems, which Rockwell has discontinued, so exact spares and migration to CompactLogix are both common requests.
Where Allen-Bradley products are used
In Oman and the GCC, Allen-Bradley controllers and drives run on oil and gas facilities, water treatment and pumping stations, cement, food and beverage and packaging plants, and on machines supplied by American OEMs. ControlLogix is often the platform for plant control systems, while PowerFlex drives are used on pumps, fans and conveyors.
Allen-Bradley products we list
| Family | Examples |
|---|---|
| ControlLogix | 1756-L85E, 1756-EN2T, 1756-EN2TR, 1756-IF16, 1756-IB32, 1756-PA75, 1756-A10 |
| CompactLogix and Micro controllers | 5069-L320ER, 5069-L340ERM, 1769-L33ER, 1769-L16ER, MicroLogix 1400, Micro820, SLC 500 (1746) |
| Distributed I/O | 1734-AENTR, 1734-IB8, 1734-IE2C, 1734-IB8S safety, 1794-AENTR, 5094-AENTR, 5069-IF8 |
| Operator terminals | PanelView Plus 7 10-inch, PanelView Plus 7 15-inch, PanelView 800, PanelView 5310 |
| Drives, motor control and networking | PowerFlex 525, PowerFlex 755, PowerFlex 4, 150-A180NBD SMC, Stratix 2000, 1783-NATR |
Ordering Allen-Bradley products: what we need
Send the full catalogue number and the series letter from the label (for example 1756-EN2T Series D), because firmware and compatibility can change between series. For drives, add the motor power, voltage and filter option. For a discontinued SLC 500 or MicroLogix part, tell us whether you need the exact spare or a migration proposal.
Facts checked against Rockwell Automation's published company history, October 2026.
Browse Allen-Bradley products by category: PLC & I/O Cards, AC Drives.
FAQ
Questions about the Allen-Bradley 2080-IQ4OB4 8-Point Combo DC Plug-in
Answers from our engineering team on installation, compatibility and integration.
01What does 2080-IQ4OB4 provide?
Four DC inputs and four DC source outputs, eight points in total.
02What is the output current per point?
A steady-state maximum of 0.5 A at 24V DC nominal.
03Are inputs sink or source?
The product page lists 12/24V DC sink/source inputs, IEC type 3 compatible.
04What is the power supply range for the outputs?
10.8V DC minimum to 30V DC maximum.
05Where can it be mounted?
In a plug-in slot of a Micro800 controller that has slots.
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