Emerson EP-3468 8-Channel Analog Current Input Module

Emerson EP-3468 8-Channel Analog Current Input Module - Precision Process Measurement for RSTi-EP Systems

The Emerson EP-3468 8-Channel Analog Current Input Module delivers high-precision process measurement for RSTi-EP distributed I/O systems. This compact slice module combines 16-bit resolution with 0.1% accuracy to provide reliable 4-20mA signal acquisition from transmitters, sensors, and field devices across manufacturing, process control, building automation, and industrial machinery applications.

Core Technical Specifications

• Model Number: EP-3468
• Channel Count: 8 analog current input channels
• Signal Range: 0-20mA, 4-20mA (software selectable per channel)
• Resolution: 16-bit A/D conversion for 0.0015% signal granularity
• Accuracy: 0.1% maximum at 25°C (77°F)
• Temperature Coefficient: 50 ppm/K maximum drift
• Conversion Time: 1ms per channel for fast process response
• Sensor Connection: 2-wire, 3-wire, or 3-wire + Functional Earth (FE)
• System Interface: RSTi-EP system bus at 48 Mbps transfer rate
• Dimensions: 11.5mm (W) x 76mm (D) x 120mm (H) - ultra-compact design

Global Safety & EMC Certifications

Certified for deployment in industrial environments worldwide:

• IEC 61131-2: Programmable controller equipment standard compliance
• Pollution Severity Level: 2 for industrial control room environments
• Overvoltage Category: II for equipment-level protection
• CE Marking: European conformity for electrical safety and EMC

Industrial Process Control Applications

Process Transmitter Interfacing: Acquire 4-20mA signals from pressure, flow, level, and temperature transmitters in chemical, pharmaceutical, and food & beverage manufacturing. The 16-bit resolution captures subtle process variations critical for quality control and regulatory compliance. Per-channel diagnostics detect open circuits, short circuits, and out-of-range conditions, enabling predictive maintenance strategies.

Building Automation Systems: Monitor HVAC sensors, energy meters, and environmental monitoring equipment in commercial buildings and data centers. The compact 11.5mm width enables high-density I/O installations in space-constrained electrical rooms. Temperature-controlled frequency suppression (50Hz/60Hz selectable) eliminates power line noise common in building electrical systems.

Manufacturing Equipment Integration: Interface with analog sensors on packaging machines, material handling systems, and assembly line equipment. The 1ms conversion time provides fast process response for closed-loop control applications. Reverse polarity protection and short-circuit proof design prevent damage from wiring errors during commissioning or maintenance.

Water & Wastewater Treatment: Acquire signals from flow meters, pH sensors, turbidity analyzers, and chlorine residual monitors in municipal water treatment facilities. The wide common mode voltage range (±50V against 0V) accommodates ground potential differences between remote pump stations and central control rooms, preventing measurement errors from ground loops.

Energy Management Systems: Monitor current transformers, power meters, and energy consumption sensors for facility energy management and demand response applications. The average-over-16-values filter option smooths noisy signals from variable frequency drives (VFDs) and switching power supplies without sacrificing measurement accuracy.

Advanced Signal Processing Features

Sophisticated measurement capabilities for demanding applications:

Configurable Frequency Suppression: Software-selectable noise rejection filters eliminate 50Hz or 60Hz power line interference. The averaging filter (16 values) provides additional noise immunity for applications with high electromagnetic interference from motors, VFDs, or welding equipment. Filters can be disabled for applications requiring maximum speed.

Threshold Detection: Automatic underrange detection (3.6mA for 4-20mA signals) and overrange detection (21.67mA) identify sensor failures, wiring faults, or transmitter malfunctions. Diagnostic status propagates to the controller for alarm generation and maintenance notifications, reducing unplanned downtime.

Multi-Wire Sensor Support: Accommodates 2-wire loop-powered transmitters, 3-wire externally powered sensors, and 3-wire + Functional Earth configurations for maximum flexibility. Each channel provides up to 125mA sensor supply current (channels 0-3 and 4-7 fused together) for powering 4-20mA transmitters without external power supplies.

Electrical Specifications

Protection & Diagnostic Features

Comprehensive safeguards ensure measurement integrity:

• Reverse Polarity Protection: Prevents damage from incorrect sensor wiring during installation
• Short-Circuit Proof: Protects module electronics from field wiring faults
• Over-Current Protection: Response time <0.1s with short-circuit to +24V
• Temperature-Dependent Reset: Automatic recovery <30s at 20°C after fault clears
• Module Diagnostics: Overall module health monitoring and fault reporting
• Individual Channel Diagnostics: Per-channel status for rapid troubleshooting

Environmental Specifications

RSTi-EP System Architecture Advantages

Critical benefits of the RSTi-EP distributed I/O platform:

• Ultra-Compact Design: 11.5mm width enables high-density I/O configurations in minimal cabinet space
• High-Speed Bus: 48 Mbps system bus transfer rate ensures fast I/O updates for time-critical applications
• Hot-Swap Capability: Replace modules without powering down the system (when properly configured)
• Flexible Mounting: DIN rail installation with snap-on design for rapid deployment
• Scalable Architecture: Mix analog, digital, and specialty I/O modules on the same bus

Why Choose Industrial Control Hub?

Your specialized source for genuine Emerson automation components:

• ✓ 100% authentic OEM products with full manufacturer traceability and warranty
• ✓ Expert technical support from certified automation engineers
• ✓ Extensive inventory of current production and legacy RSTi-EP modules
• ✓ Expedited global shipping to US, UK, EU, and Asia-Pacific markets
• ✓ Competitive pricing with volume discounts for project quantities
• ✓ Complete documentation, wiring diagrams, and configuration assistance

Complementary RSTi-EP I/O Modules

Installation & System Integration

• Mounting: Standard 35mm DIN rail with snap-on installation
• Wiring: Removable terminal blocks for easy field wiring and maintenance
• Configuration: Software-configurable via PACSystems programming software
• Bus Connection: Automatic addressing via RSTi-EP system bus
• Power Distribution: Powered via system bus - no external power required

Ordering Information & System Planning

• EP-3468: 8-Channel Analog Current Input Module (this product)
• Signal Range: 0-20mA or 4-20mA (software selectable per channel)
• Sensor Wiring: 2-wire, 3-wire, or 3-wire + FE configurations supported
• System Requirements: RSTi-EP network adapter and PACSystems controller
• Accessories: Terminal blocks included, DIN rail sold separately

Technical Documentation & Support

Complete installation manuals, wiring diagrams, configuration guides, and PACSystems programming examples available upon request. Our application engineering team provides system design consultation, I/O point calculations, noise immunity recommendations, and troubleshooting assistance for complex RSTi-EP distributed I/O implementations.

Maintenance & Service Life

• MTBF: >500,000 hours at 25°C ambient temperature
• No Calibration Required: Factory calibrated for life with digital signal processing
• Preventive Maintenance: Verify terminal block tightness annually, inspect for corrosion
• Expected Service Life: 15+ years in typical industrial control room environments
• Spare Parts Strategy: Maintain spare modules for critical measurement loops

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