Product Details
Product Description
The 1771-IFMS is a high-performance, 8-channel differential analog input module designed for the Allen-Bradley PLC 5 platform, specifically engineered to capture low-level 0–50 mV signals in hazardous environments. Featuring an intrinsically safe architecture and 12-bit resolution, this conformal-coated module provides a rapid 14.5 ms update rate and high-precision data conversion (0.1% accuracy) without the need for external power, making it an essential component for critical millivolt measurements in volatile industrial settings.
Technical Specifications
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Module Architecture: Fast Millivolt Analog Input
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Input Configuration: 8 Differential Channels (Intrinsically Safe)
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Measurement Range: 0 to 50 mV DC
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A/D Resolution: 12-bit binary
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Data Representation: ±32,767 Binary or ±9,999 BCD (selectable)
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Sampling Rate: 14.5 ms update for all 8 channels
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System Accuracy: 0.1% of range at 25 °C
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Non-Linearity: ±1 LSB
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Backplane Current Draw: 750 mA
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Isolation: Differential through intrinsically safe circuitry
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Required Wiring Arm: 1771-WG
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Environmental Protection: Conformal Coated PCB
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Mounting Compatibility: 1771 Universal I/O Chassis
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Unit Mass: 1.22 kg (2.69 lbs)
Application and Installation
This module is primarily utilized in process industries such as chemical refining, oil and gas, and pharmaceutical manufacturing where millivolt-level signals originate from Class I, II, or III hazardous locations. The 1771-IFMS ensures that the energy levels sent into the hazardous area are limited to prevent ignition.
Engineering FAQ
What is the benefit of the conformal coating on this module?The coating provides a thin polymeric film over the components of the 1771-IFMS. This is essential for PLC 5 systems located near sea air or chemical processing lines where airborne contaminants could otherwise cause short-circuiting or traces to corrode over time.
How does the "Fast" designation affect signal processing?With an update time of 14.5 ms for the entire channel block, the 1771-IFMS is significantly quicker than standard analog modules. This makes it suitable for high-speed PID loops or protective monitoring where millivolt fluctuations must be detected and processed by the PLC 5 processor in near real-time.
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
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Human-Machine Interface Design: Essential Guide to HMI Selection, Visualization, and Control System Integration
Human-Machine Interfaces (HMIs) serve as the primary operational window into complex industrial automation systems. Modern HMIs convert raw machine data into clear graphical displays, enabling operators to oversee entire manufacturing processes in real time. Instead of relying on physical control panels full of hardwired switches, engineers program interactive screens using intuitive graphics, dynamic color coding, and responsive touch interfaces. Over my 15 years in control systems engineering, I have observed HMIs transform from basic display screens into sophisticated command centers that drive operational efficiency across DCS and PLC environments.
Understanding Safety Relays in Industrial Automation: Architecture, Operation, and Functional Safety
Standard electromechanical relays provide basic electrical isolation between low-voltage control circuits and high-power output loads. A traditional switching relay features a magnetic coil driving mechanical Common (COM), Normally-Open (NO), and Normally-Closed (NC) contacts. However, standard relays pose severe functional risks when deployed in critical safety interlock circuits. High current inrush or mechanical wear can weld contacts together permanently. If contact welding occurs in an emergency stop circuit, pressing the button fails to halt hazardous machinery movements. Consequently, global functional safety standards prohibit standard relays for critical machine guarding functions.