Allen-Bradley 1756SC-IF8H 8-Channel 4-20mA HART Module

Availability: 20 left in stock

Product Overview The Allen-Bradley 1756SC-IF8H provides a sophisticated interface for smart field devices within the ControlLogix ecosystem. This module acquires high-resolution analog...

SKU: 1756SC-IF8H

Manufacturer: Allen Bradley
Product No.: 1756SC-IF8H
Product Type: ControlLogix I/O
Product Origin: USA
Payment:T/T, Western Union
Weight: 1200g
Shipping port: Xiamen
Warranty: 12 months

Description Reviews

Product Overview

The Allen-Bradley 1756SC-IF8H provides a sophisticated interface for smart field devices within the ControlLogix ecosystem. This module acquires high-resolution analog signals while simultaneously extracting digital HART data, including device status, secondary variables, and diagnostics. By integrating the HART protocol directly into the I/O layer, it eliminates the need for external HART multiplexers. We supply this unit as 100% Brand New and Original, ensuring your critical process loops benefit from maximum precision and full manufacturer-spec reliability.

Technical Specifications

The 1756SC-IF8H utilizes advanced Analog-to-Digital converters to achieve laboratory-grade measurement in industrial environments.

Attribute	Specification Details
Number of Channels	8 Isolated Analog Inputs
Signal Ranges	0-20 mA, 4-20 mA
Communication	Full HART Protocol Overlay
Resolution	16 to 21 Bits (User Selectable)
Accuracy	Better than 0.1 Percent of Range
Data Format	IEEE 32-bit Floating Point
Input Impedance	249 Ohms
Isolation	Channel-to-Channel and Channel-to-Backplane
Power Dissipation	4.01 W (Current Mode)
Backplane Draw	300 mA at 5.1V / 70 mA at 24V
Operating Temp	0 to 60 C (32 to 140 F)

Engineering Advantages

Individual Channel Isolation: The 1756SC-IF8H isolates each channel to prevent ground loops and signal cross-talk. This architectural choice ensures that a fault or surge on one field instrument does not compromise the data integrity of the other seven channels.
Predictive Maintenance via HART: Beyond simple 4-20mA signals, this module polls the "Digital Heartbeat" of your transmitters. It captures secondary variables and device health bits, allowing your Logix controller to trigger maintenance alerts before a sensor failure causes a process shutdown.
Dynamic Resolution Scaling: Engineers can configure the module for up to 21-bit resolution. This provides the extreme granularity required for custody transfer, high-precision chemical dosing, and sensitive pressure monitoring.
Simplified Asset Management: The module integrates seamlessly with FDT/DTM software and Rockwell Automation's AssetCentre. This allows technicians to configure field instruments remotely from the control room, significantly reducing hazardous area entries.

FAQs

Q: Does the 1756SC-IF8H require an external HART multiplexer?

A: No. The 1756SC-IF8H features built-in HART modems for every channel. It communicates directly with smart transmitters and passes the digital data straight to the ControlLogix backplane, simplifying your network architecture.

Q: Can this module function as a standard analog input if HART is not required?

A: Yes. You can use the 1756SC-IF8H as a high-density, isolated 0-20mA or 4-20mA analog input card. You simply disable the HART polling in the software configuration to use it as a standard high-resolution module.

Q: What terminal blocks are compatible with this module?

A: This module installs into a standard ControlLogix chassis and is compatible with Feed-through Analog Interface Modules (AIFM). It typically utilizes 3 terminals per channel to accommodate signal, return, and shield/grounding requirements for shielded twisted pair wiring.

Q: How does the module handle open-circuit conditions?

A: The module includes onboard intelligence to detect open-circuit events within approximately 5 seconds. It immediately updates the channel status bit in the controller, allowing the PLC to execute safety interlocking or alarm routines.

What's clients say about us

Excellent Emergency Support!

Our production line was down due to a faulty Bently Nevada monitor. We found it in stock here and they shipped it via DHL immediately. Back in operation within 48 hours—truly a lifesaver for our plant.

Mark Thompson

Maintenance Manager, USA

Reliable Source for New Spares

Finding brand new, original modules is critical for our safety. This team delivers factory-fresh components with full certification. Their commitment to only selling new products makes them our most trusted partner.

Robert Hoffmann

Engineering Lead, Germany

Top-tier Service and Quality

We have sourced Honeywell and Schneider parts here for two years. Every shipment arrives well-packaged with original factory seals intact. Clear communication and the best lead times in the industry.