PRODUCT INFORMATION
Product Overview
The Allen-Bradley 1771-OQC is an isolated DC output module for the PLC-5 system. This digital output module controls whether connected DC devices are powered on or off. It provides eight DC sink outputs arranged into four isolated groups of two outputs each. The nominal operating voltage is 24 Volts DC with a tolerance of minus 15 to plus 10 percent.
The working isolated voltage ranges between 20.4 and 26.5 Volts DC. Each output and group handles a continuous current load of up to 2.25 Amps. Total output current reaches a maximum rating of 9 Amps per module. Backplane current draw equals 225 mA from the chassis power supply. Internal clamping diodes provide transient surge suppression to protect output transistors from voltage spikes. The unit dissipates up to 19.1 Watts of power and 65.1 BTU per hour thermally.
TECHNICAL DATA
Technical Specifications
| Parameter | Specification |
|---|
| Category | 24 Volts DC sink |
|---|
| Product Line | PLC 5 |
|---|
| Weight | 1.38 lbs (0.62 kg) |
|---|
| Outputs | 8 outputs |
|---|
| Isolated Voltage | 20.4 to 26.5V DC |
|---|
| Backplane current load | 225 mA |
|---|
| Output current | 2,25 A per output/group - 9 A per module. |
|---|
| Surge Current | 4 A per 10 ms per output |
|---|
| Thermal dissipation | 65,1 BTU/hr |
|---|
| Mounting | Chassis |
|---|
| Surge suppression | Yes |
|---|
| Compatibility | Motors starters, solenoids, indicators |
|---|
TECHNICAL INFORMATION
Features
- Provides eight digital DC sink outputs organized into four isolated groups.
- Delivers up to 2.25 A per group and 9 A maximum per module.
- Supports a surge current capacity of 4 A per output for 10 milliseconds.
- Draws 225 mA current load directly from the chassis backplane.
- Contains internal clamping diodes for output transient surge suppression.
- Operates at a rated supply voltage of 24 Volts DC.
TECHNICAL INFORMATION
Applications
- Switching 24V DC motor starters.
- Controlling 24V DC solenoids.
- Driving industrial DC indicators.
- Operating low-voltage DC relays.
TECHNICAL INFORMATION
Connections / Interfaces
- Provides four isolated output groups with two outputs per group.
- Connects directly into the 1771 I/O chassis backplane connector.
TECHNICAL INFORMATION
Installation Guidelines
- Install the module into any available slot in a 1771 I/O chassis.
- Mount the chassis inside a clean indoor industrial enclosure.
- Maintain ambient operating temperatures between 0 and 60 degrees Celsius.
- Ensure relative humidity remains between 5 and 95 percent without condensation.
- Install additional suppression devices when wiring inductive loads such as solenoids or motors.
TECHNICAL INFORMATION
Compatibility
- Compatible with Allen-Bradley 1771 I/O chassis.
- Operates with 24V DC motor starters, solenoids, relays, and indicators.
COMPATIBILITY
Compatibility & Replacement
COMPATIBLE MODELSCompatible with Allen-Bradley 1771 I/O chassis. Operates with 24V DC motor starters, solenoids, relays, and indicators.
Verify compatibility against the exact Part Number, revision and manufacturer documentation before ordering.
PART VERIFICATION
Before You Order
Industrial automation parts can share similar model names, suffixes and revisions. Confirm the complete manufacturer Part Number before purchase.
01Check Part NumberMatch the complete ordering code on the existing unit.
02Confirm RevisionCheck suffix, hardware or firmware when applicable.
03Send a Label PhotoWe can review a clear label photo when identification is uncertain.
ORDERING PROCESS
From RFQ to Dispatch
1Submit Part Number2Verify Product Identity3Confirm Stock & Condition4Issue Quotation5Dispatch & Tracking
PRODUCT FAQ
Frequently Asked Questions
What is the function of the Allen-Bradley 1771-OQC module?
The 1771-OQC switches power for 24V DC devices including solenoids, motor starters, and indicators.
What is the maximum output current rating for the 1771-OQC?
It provides up to 2.25 Amperes per group and up to 9 Amperes per module.
Does the 1771-OQC module include internal surge suppression?
Yes, internal clamping diodes protect output transistors from high-voltage transient spikes.
What is the indicative reference price for the 1771-OQC?
Observed market reference pricing is around $395.00 USD. This is an indicative market reference price only, not a final quotation.
