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 1756-OF8H is a high-performance ControlLogix analog output module featuring eight individually isolated channels with integrated HART (Highway Addressable Remote Transducer) protocol capabilities. This module is specifically designed for complex process control environments where digital communication with smart field devices is required over standard 4-20mA analog signals. By utilizing the 1756-OF8H, engineers can access advanced device diagnostics and configuration data directly through the Logix controller without the need for external HART multiplexers. Each channel provides robust 250V continuous reinforced insulation, ensuring signal integrity and equipment protection in demanding industrial electrical environments.
Technical Specifications
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Module Catalog Number: 1756-OF8H
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Output Configuration: 8 Isolated Channels
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Analog Ranges: 0…20 mA or 4…20 mA (Voltage mode via specific wiring/scaling)
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HART Version: HART v5, v6, and v7 supported
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Digital Resolution: 15-bit across 24mA (approx. 732 nA/bit)
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Backplane Current Draw: 220 mA at 5.1V DC | 360 mA at 24V DC
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Settling Time (HART Disabled): <23 ms to 95% of full scale
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Settling Time (HART Enabled): <100 ms to 95% of full scale
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Isolation Voltage: 250V AC continuous (Reinforced Insulation Type)
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Power Dissipation: 6.5 Watts Maximum
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Thermal Dissipation: 22.2 BTU/hr
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Operating Temperature: 0°C to +60°C (32°F to +140°F)
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Mechanical Integrity: 30g peak shock; 2g vibration at 10-500 Hz
Application and Comparison
The 1756-OF8H is typically deployed in chemical processing, oil and gas, and pharmaceutical manufacturing where "smart" instrumentation is standard. Unlike the standard 1756-OF8, the 1756-OF8H allows for simultaneous analog control and digital asset management. Its isolated architecture is superior for systems where grounding loops or electrical interference between channels could compromise process stability.
FAQ
Does the 1756-OF8H require a separate HART modem for configuration?No, the module acts as a HART master, allowing Asset Management Software (like FactoryTalk AssetCentre) to communicate directly with field instruments through the ControlLogix backplane.
Can I mix current and voltage outputs on this module?While primarily optimized for current-based HART loops, the module can be configured for voltage outputs; however, HART communication is only available when operating in current mode.
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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