Description
1771-P10 Allen‑Bradley Output module
Product Dimensions:
Allen-Bradley Output Modules: Overview
Allen-Bradley (a Rockwell Automation brand) offers a comprehensive portfolio of Output (I/O) modules designed for industrial automation systems. These modules serve as interfaces between programmable logic controllers (PLCs) like ControlLogix, CompactLogix, and MicroLogix, and field devices such as actuators, valves, motors, and indicators. They are available in digital, analog, and specialty configurations, supporting both standard and safety-certified applications. Common series include Bulletin 1756 (ControlLogix), 1769 (Compact I/O), 5069 (Compact 5000), and distributed options like POINT I/O (1734 series) and ArmorBlock (1732 series). These modules enable precise control signals for outputs, enhancing system reliability in harsh environments.
Detailed Description
Allen-Bradley Output modules convert digital or analog signals from the PLC into real-world control signals for output devices. They come in chassis-based designs (mounted in a rack with the controller) and distributed setups (placed closer to field devices for reduced wiring). Key types include:
- Digital Output Modules: Provide on/off control for discrete devices (e.g., relays, solenoids). Available in sinking (current flows into the module) or sourcing (current flows out) configurations.
- Analog Output Modules: Deliver variable signals (voltage or current) for proportional control, such as speed adjustment in motors or position control in valves.
- Safety Output Modules: Integrated with CIP Safety protocol for SIL 3/PLe compliance, ensuring fail-safe operation in hazardous areas.
- Specialty Modules: Include pulse-width modulation (PWM) outputs for precise motor speed control or encoder interfaces.
These modules support major communication protocols like EtherNet/IP, DeviceNet, and ControlNet, allowing seamless integration into networked systems. They feature removable terminal blocks (RTBs) or prefabricated cables for easy wiring and hot-swappable RIUP (Removal and Insertion Under Power) for minimal downtime.
Product Parameters/Specifications
Specifications vary by model and series, but below is a summary of typical parameters for popular output modules. For exact details, refer to the specific Bulletin number.
| Parameter | Digital Output (e.g., 1756-OB16) | Analog Output (e.g., 1769-OF5) | Safety Output (e.g., 1791DS-IB8XOW4) |
|---|---|---|---|
| Number of Outputs | 16 (configurable in groups) | 8 channels | 4 outputs (integrated with inputs) |
| Output Type | DC Sinking/Sourcing | Voltage (0-10V/±10V) or Current (4-20mA) | Digital DC, Safety-rated |
| Voltage Range | 10-30V DC | 0-10V DC or ±10V DC | 24V DC nominal |
| Current per Output | 2A max per point, 8A max per module | 20mA max | 0.5A per output |
| Resolution | N/A (binary) | 10-bit (0-1023 counts) | N/A (binary with diagnostics) |
| Accuracy | ±0.5% of full scale | ±0.2% of full scale | ±1% (with diagnostic feedback) |
| Operating Temperature | -20°C to 60°C | -40°C to 70°C | -20°C to 55°C (TÜV-certified) |
| Power Consumption | 0.5W (backplane) + field power | 0.66W | 1.2W (includes safety circuitry) |
| Mounting | DIN rail or chassis-based | DIN rail | Block-style, enclosure required |
| Certifications | CE, UL, cUL, ATEX (optional) | CE, UL | TÜV SIL 3, Cat. 4, PLe |
| Communication | EtherNet/IP, DeviceNet | Backplane integration | CIP Safety over EtherNet/IP |
| Weight | ~0.3 kg | 0.22 kg | ~0.4 kg |
These specs are drawn from representative models; always verify with Rockwell Automation datasheets for custom applications.
Product Advantages
Allen-Bradley Output modules stand out in industrial automation due to their robust design and integration capabilities:
- Flexibility and Scalability: Available in various point densities (8-32 points per module) and form factors (chassis-based, block, or modular distributed I/O), allowing customization to fit space constraints and expansion needs.
- Enhanced Diagnostics and Safety: Built-in DeviceLogix™ technology for on-module logic solving, plus Guard I/O™ for safety applications up to SIL 3/Cat. 4. Features like short-circuit protection, overvoltage detection, and real-time diagnostics reduce troubleshooting time.
- Seamless Integration: Native support for Studio 5000 Logix Designer® software, enabling easy programming and configuration without additional tools. Compatible with major PLC families for plug-and-play setup.
- Reliability in Harsh Environments: IP20-rated for in-cabinet use, with options for high-vibration, extreme temperature, and hazardous location certifications (e.g., ATEX). RIUP allows module replacement without system shutdown.
- Cost Efficiency: Reduces wiring costs through distributed I/O placement near actuators; lowers inventory needs with rackless designs in Compact series.
- Performance Edge: High-speed outputs (up to 1ms response) and PWM capabilities for precise control, improving energy efficiency and machine throughput.
These advantages make them ideal for modernizing legacy systems or building new ones with predictive maintenance via integrated analytics.
Notes/Cautions
- Installation: Always use enclosures for IP20-rated modules to protect against dust and moisture. Ensure proper grounding to avoid electrical noise; follow RTB wiring guidelines for 14-gauge or heavier wire (use extended-depth housings like 1756-TBE).
- Power Supply: Field power must match module ratings (e.g., 24V DC nominal); oversizing can cause overheating. For safety modules, verify CIP Safety configuration before commissioning.
- Compatibility: Modules are controller-family specific (e.g., 1756 for ControlLogix only). Update firmware via ControlFLASH™ for optimal performance and security patches.
- Maintenance: Perform regular inspections for loose connections; RIUP is supported but requires trained personnel to avoid arc flash risks. Do not exceed max current ratings to prevent module failure.
- Environmental Limits: Avoid exceeding temperature/humidity specs; for hazardous areas, select certified variants only.
- General: Consult user manuals for wiring diagrams and programming examples. Rockwell Automation products require authorized distributors for warranty support.
Product Applications
Allen-Bradley Output modules are versatile for discrete and process automation across industries:
- Manufacturing: Controlling conveyor motors, robotic arms, and assembly line solenoids via digital outputs; analog for variable speed drives in packaging machines.
- Process Control: Analog outputs for valve positioning in chemical plants or flow regulation in water treatment; safety outputs for emergency shutdowns.
- HVAC and Building Automation: Temperature and damper control using analog signals; digital for fan and pump actuation.
- Energy and Utilities: PWM outputs for motor soft-starters in pumps; safety modules for grid protection systems.
- Automotive and Food & Beverage: High-density distributed I/O for sensor-actuator interfaces in assembly lines; IP-rated options for washdown environments.
- Safety-Critical Systems: Guard I/O in machinery with moving parts, ensuring compliance with ISO 13849 standards.
These modules excel in applications requiring high uptime, from standalone machines to large-scale SCADA-integrated plants. For tailored solutions, Rockwell’s technical support can assist with simulations.
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Please make an inquiry for more models:
| AB | 1746-OB16 |
| AB | 1746-OB16E |
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| AB | 1746-OB32E |
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| AB | 1746-OBP16 |
| AB | 1746-OG16 |
| AB | 1746-OV16 |
| AB | 1746-OV32 |
| AB | 1746-OW16 |
| AB | 1746-OW16/C |
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| AB | 1746-OW4 |
| AB | 1746-OW8 |
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| AB | 1746-P1 |
| AB | 1746-P2 |
| AB | 1746-P2/C |
| AB | 1746-P3 |
| AB | 1746-P4 |
| AB | 1746-P5 |
| AB | 1746-P6 |
| AB | 1746-P7 |
| AB | 1746SC-NI8U |
| AB | 1746SC-OAP8I |
| AB | 1747-ACN15 |
| AB | 1747-ACNR15 |
| AB | 1747-ACNR15/A |
| AB | 1747-ASB |
| AB | 1747-ASB/A |
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| AB | 1747-BA |
| AB | 1747-BSN |
| AB | 1747-BSN1771-IFE |
| AB | 1747-CP3/A |





