1794-IJ2/A - EtherNet/IP Plug-and-Play - Industrial Automation 4-Port Managed Switch Module

1.Product Overview​

The ​Allen-Bradley 1794-IJ2/A FLEX I/O™ Isolated RTD Input Module​ provides high-precision temperature monitoring for critical industrial processes. Designed for Rockwell Automation’s modular FLEX platform, this 2-channel module supports ​2-/3-/4-wire Pt100/200/500/1000 RTDs​ with ​channel-to-channel isolation​ (300V AC) and ​1500V AC backplane isolation. Its rugged epoxy-potted construction (–40°C to +70°C) withstands extreme humidity (>95%), chemical exposure, and vibration (5g @ 15Hz). Featuring ​24-bit delta-sigma ADC resolution, it achieves ±0.1°C accuracy with built-of ​lead resistance compensation​ for long cable runs. Integrated diagnostics include open-wire detection, sensor drift alerts, and NAMUR NE43-compliant failure signaling for SIL 2 applications.

​2.Critical Technical Specifications​

​Performance-defining parameters:

• ​Input Types: 2/3/4-wire RTDs: Pt100/200/500/1000, Cu10, Ni120 (IEC 751)
• ​Measurement Accuracy: ±0.1°C @ 0-100°C (3-wire Pt100), ±0.05% FSR overall
• ​Excitation Current: 0.5mA/1.0mA software-selectable (minimize self-heating)
• ​Lead Resistance Compensation: Auto-corrects up to 30Ω per wire
• ​Sample Rate: 480ms per channel with 50/60Hz noise rejection >120dB
• ​Isolation: 300V AC channel-channel, 1500V AC field-backplane (EN 50178)
• ​Power Consumption: 95mA @ 5V DC backplane, 22mA @ 24V field
• ​Certifications: ATEX II 3G, IECEx, SIL 2 (IEC 61508), cULus HazLoc
• ​EMC Compliance: EN 61326-3-1 (medical-grade immunity)

​3.Targeted Applications​

​Mission-critical temperature monitoring:

• ​Pharmaceutical Sterilization: Autoclave vessel profiling with 21 CFR Part 11 compliance
• ​Oil & Gas: Pipeline PT100 monitoring in ATEX Zone 1 hazardous areas
• ​Food Processing: Pasteurization temperature validation (EHEDG-compatible)
• ​Power Transformers: Winding temp surveillance via 4-wire Pt100s (IEC 60076)
• ​Semiconductor Fabs: Diffusion oven control with ±0.2°C stability
• ​HVAC: Chiller plant efficiency optimization with Cu10 sensors
  Ensures SIL 2 safety interlocks for reactor over-temperature protection and burner management.

4.​Competitive Advantages​

​Operational differentiators:

• ​Accuracy Leadership: 24-bit ADC outperforms standard 16-bit modules by 4× resolution
• ​Diagnostic Intelligence: Detects 0.5Ω lead degradation 10× faster than competitors
• ​Safety Integration: Certified for safety-instrumented systems (SIS) without external barriers
• ​Calibration Economy: Auto-zero compensation eliminates field recalibration for 5+ years
• ​Space Efficiency: 75mm DIN-rail width consolidates dual-isolated channels
• ​Wiring Flexibility: Accepts 18-12 AWG wires without ferrule requirements
• ​Noise Immunity: 10kV/µs common-mode rejection in VFD-heavy environments

5.Functional Capabilities​

​Advanced process monitoring:

• ​Predictive Maintenance: Tracks RTD resistance drift trends via embedded trend logs
• ​NAMUR NE43 Compliance: Outputs >22mA/<3.8mA for sensor failure diagnostics
• ​Sensor Matching: Auto-identifies Pt100 curve deviations (DIN 43760 vs. IEC 751)
• ​Programmable Alarms: High/low/rate-of-change limits with latching options
• ​Cold Junction Compensation: ±0.25°C accuracy for integrated thermocouple ref
• ​Linearization: Supports custom RTD curves (Callendar-Van Dusen coefficients)
• ​Data Stamping: 10ms-resolution event logging for sequence-of-events analysis

​

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.
more about us , u can view our official web:http://www.zcsensors.com/follow us :

1)https://www.facebook.com/Sensors-and-transmitters-1883785301860678/?ref=aymt_homepage_panel&boosted_auto_open=BOOSTED_PAGELIKE

2)https://www.linkedin.com/in/z-csensorcenter/detail/recent-activity/shares/

With many years of experience in the industrial sector, we consistently deliver the highest quality of spare parts.which make sure that all this jobs are

perfectly.

we are major in PLC,Sensors,HIM,Transmitters.

Best Supply Brands As Following:1)Bently nevada.2)+GF+.3)Rosemount.4)ABB.5)Allen-Bradley.6)Foxobro.Good working environment, perfect team, sincere cooperation →→ Achieve u and our success !!!