​1.Product Overview​

The ​Allen-Bradley 1794-IE8 FLEX I/O™ Analog Input Module​ delivers precision signal acquisition for industrial process control. Designed as part of Rockwell's distributed I/O ecosystem, this module features ​8 configurable channels​ supporting voltage (±10V DC) or current (0–20mA/4–20mA) inputs with ​16-bit resolution. Its rugged IP67-rated epoxy housing (–40°C to +70°C) withstands harsh washdown, oil, and chemical exposure. Integrated ​channel-to-channel isolation​ (250V AC) and ​​±0.1% accuracy​ ensure reliable measurement in noisy environments. Studio 5000® provides auto-ranging, custom scaling, and NAMUR NE43 diagnostics for seamless integration into control systems.

2.​Critical Technical Specifications​

​Performance-defining parameters:

• ​Input Ranges:
  • Voltage: ±10V DC, ±5V DC, 1–5V DC
  • Current: 0–20mA, 4–20mA (with 250Ω burden)
• ​Resolution: ​16-bit​ (65,536 counts)
• ​Accuracy: ±0.1% full-scale @ 25°C
• ​Update Rate: ≤8ms per channel (all channels scanned in ≤64ms)
• ​Isolation: 250V AC channel-to-backplane | 250V AC channel-to-channel
• ​Common-Mode Rejection: >100dB @ 50/60Hz
• ​Overvoltage Protection: ±30V continuous
• ​Power Consumption: 120mA @ 5V DC backplane

​3.Targeted Applications​

​Precision measurement systems:

• ​Chemical Processing: Reactor pressure/temperature monitoring (4–20mA transmitters)
• ​Food & Beverage: Fill-level sensing in CIP washdown environments (IP69K)
• ​Water Treatment: pH/ORP electrode interfaces (±10V DC signals)
• ​Energy Management: Current transformer monitoring (1–5V DC outputs)
• ​Manufacturing: Thickness/weight measurement systems
• ​HVAC: Duct static pressure control
• ​Mining: Conveyor load cell signal conditioning

​4.Competitive Advantages​

​Engineering superiorities:

• ​Adaptive Signal Handling: Auto-detects 0–20mA vs. 4–20mA without reconfiguration
• ​NAMUR NE43 Diagnostics: Detects sensor degradation via <3.8mA/>20.5mA thresholds
• ​Wiring Economy: Spring-clamp terminals eliminate signal conditioners
• ​Lifecycle Accuracy: <0.01%/year drift with auto-zero calibration
• ​Space Optimization: 8 channels in 42mm DIN width (30% denser than competitors)
• ​Noise Immunity: Digital filtering rejects 10V common-mode noise
• ​Studio 5000® Efficiency: Pre-built AOIs reduce commissioning by 80%

5.​Functional Capabilities​

​Advanced signal management:

• ​Dynamic Scaling: Custom engineering unit conversion (e.g., mA → PSI)
• ​Programmable Alarms:
  • High/low limits per channel
  • Rate-of-change triggers
• ​Averaging Filters: Selectable 4–64 sample moving averages
• ​Burnout Detection: <1mA current monitoring for sensor health
• ​Lead Resistance Compensation: Auto-corrects ≤100Ω wire resistance
• ​Retransmission Outputs: Loop-powered 4–20mA via 1794-OE4 companion module
• ​Module Synchronization: μs-accurate sampling via FLEX adapter coordination

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Packaging & Shipping

Company Information
Xiamen ZhiCheng Automation Technology Co., Ltdit is a leading global supplier of control system components. We specialize in control systems and drives.
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