In modern industrial automation, reliable communication between remote I/O and PLCs is essential. The Schneider Electric CRA module enables efficient Ethernet-based remote I/O connectivity in PLC and DCS systems, improving scalability, diagnostics, and overall networked automation performance.
Product Details
Product Description
The Allen-Bradley 1791-16A0 CompactBlock I/O module is a discontinued 16-point AC input block designed for distributed I/O applications. It provides reliable signal interfacing for field devices such as switches and sensors, supporting 120V AC nominal input with robust surge and off-state voltage handling.
Technical Specifications
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Manufacturer: Allen-Bradley
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Product Line: 1791 CompactBlock I/O
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Part Number: 1791-16A0
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Weight: 1.25 lbs (0.57 kg)
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Inputs per Block: 16 (organized into 2 groups of 8)
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Nominal Input Voltage: 120 V AC
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On-State Voltage Range: 79–132 V AC, 47–63 Hz
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On-State Current: 5 mA minimum at 79 V
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Off-State Voltage: Maximum 35 V AC
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Off-State Current: Minimum 2.3 mA
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External Power Supply: 85–132 V AC, 47–63 Hz, 150 mA
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Maximum Output Rating: 600 mA at 30 °C; 300 mA at 60 °C
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Maximum Surge Current: 10 A for 50 ms (repeatable every 2 seconds)
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Compatible Field Instruments: Proximity switches, limit switches, selector switches, float switches, pushbutton switches
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Mounting Options: Vertical or horizontal installation
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Outputs per Block: None (input-only module)
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Lifecycle Status: Discontinued/Obsolete
Application Scenarios
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Distributed I/O Systems: Provides AC input interfacing for multiple field devices
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Industrial Control Panels: Suitable for integration with sensors and switches in automation systems
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Legacy Systems: Used in older installations requiring CompactBlock I/O compatibility
FAQ
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Q: How many inputs does the 1791-16A0 support? A: It supports 16 inputs, divided into 2 groups of 8.
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Q: What types of field devices are compatible? A: Proximity switches, limit switches, selector switches, float switches, and pushbutton switches.
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Q: Does this module provide outputs? A: No, the 1791-16A0 is an input-only module.
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Q: What is its lifecycle status? A: The module is discontinued/obsolete but may still be found in legacy systems.
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Q: How does this compare to newer Compact I/O modules? A: Modern Compact I/O modules offer higher density, improved diagnostics, and broader voltage ranges compared to the legacy 1791-16A0.
Additional Information
- 100% Genuine Parts: All products are original and authentic, ensuring reliable industrial performance.
- 30-Day Refund Guarantee: Return any in-stock item within 30 days in original, unopened packaging for a full refund (excluding shipping and fees).
- 12-Month Warranty: Covers defects in materials or workmanship; excludes misuse, normal wear, or unauthorized modifications.
- Worldwide Shipping: We ship via USPS, UPS, FedEx, and DHL. Delivery times vary by country and may be subject to customs or import fees.
- Support & Contact: Technical and warranty assistance is available anytime. Contact us here: Contact.
- Purchase Guidance: Check product specifications and compatibility carefully before ordering to ensure proper application.
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