Product Details
Overview
The Allen-Bradley 1756-IF8H is an 8-channel HART-enabled analog input module for ControlLogix systems, offering precise measurement of voltage and current signals while supporting HART communication standards 5, 6, and 7. The module is designed for reliable signal acquisition with robust overvoltage protection, isolation, and high-resolution performance.
Technical Specifications
Module Details
-
Model: 1756-IF8H
-
Input Channels: 8 differential inputs with 1 HART modem per module
-
Input Voltage Ranges: 0…5V, 1…5V, 0…10V, ±10V
-
Input Current Ranges: 0…20 mA, 4…20 mA
-
Resolution: 16–21 bits across all ranges
-
Compatible HART Versions: HART 5, 6, 7
Performance
-
Analog Scan Time: 18–488 ms (filter dependent)
-
HART Scan Time: Typically 1 s per enabled channel; ~10 s for all 8 channels active
-
Open Circuit Detection: 5 s
-
Overvoltage Protection: 30V DC for voltage; 8V DC for current
-
Isolation Voltage: 50V continuous; basic insulation type; tested 1500V AC for 60 s, I/O to backplane
Accuracy & Calibration
-
Voltage Accuracy: Better than 0.05% of range (HART disabled)
-
Current Accuracy: Better than 0.15% of range (HART disabled)
-
Calibration Interval: 12 months typical
-
Temperature Rating: North America T4A / IEC T4
Environmental & Physical
-
Operating Temperature: 0°C to 60°C
-
Storage Temperature: -40°C to 85°C
-
Relative Humidity: 5–95% non-condensing
-
Enclosure: Open-style, no protective housing
Applications
The 1756-IF8H module is ideal for precise analog signal monitoring in process control, supporting HART communication for integration with smart field devices. Typical applications include level measurement, temperature control, and flow monitoring.
FAQ
Q: How many HART channels does the module support?
A: The module provides 1 HART modem for 8 differential analog inputs.
Q: What input types are supported?
A: Voltage (0…5V, 1…5V, 0…10V, ±10V) and current (0…20 mA, 4…20 mA).
Q: What is the update time for HART readings?
A: Typically 1 s per active HART channel; around 10 s if all 8 channels are enabled.
Q: Does it offer overvoltage protection?
A: Yes, 30V DC for voltage inputs and 8V DC for current inputs.
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.
Tech & Buying Guide
Strategic Selection: Choosing the Right SCADA Software for Your PLC Project
In industrial automation, the SCADA (Supervisory Control and Data Acquisition) system acts as the bridge between raw machine data and actionable human intelligence. Selecting the incorrect software platform can lead to integration bottlenecks, scalability issues, and excessive long-term maintenance costs. As an automation consultant with 15 years of experience, I have guided many projects through the selection process. Below are the essential criteria for choosing a platform that ensures both performance and longevity.
Ensuring Operational Continuity: The Strategic Value of Redundant Automation Systems
In modern industrial landscapes, unplanned downtime is the ultimate adversary. For sectors relying on complex PLC and DCS architectures, a single hardware failure can trigger catastrophic production losses. Therefore, implementing redundant automation systems is no longer a luxury; it is a fundamental requirement for mission-critical operations. In this article, I analyze why redundancy remains the backbone of reliable industrial infrastructure.
Selecting the Right Cables for Industrial Automation: A Comprehensive Guide
Selecting the appropriate cabling infrastructure is critical for the success of any industrial automation project. Improper cable selection often leads to signal degradation, system instability, and costly downtime. As an automation engineer, I frequently see projects compromised by poor cabling choices in harsh industrial environments. This guide simplifies the complex landscape of cabling to help you make informed decisions for your PLC, DCS, and control systems.