Emerson SE4301T02 DI 24VDC Dry Contact CHARM

Emerson SE4301T02 DI 24VDC Dry Contact CHARM - Versatile Digital Input for DeltaV Process Control

The Emerson SE4301T02 DI 24VDC Dry Contact CHARM delivers reliable discrete signal acquisition for DeltaV distributed control systems, providing low-side sensing of 24VDC dry contact devices. This digital input module combines robust field circuit protection with advanced pulse counting capabilities, making it the ideal solution for monitoring switches, relays, proximity sensors, and high-speed pulse generators in industrial automation environments.

Core Technical Specifications

• Input Type: 24VDC dry contact, low-side sense configuration
• Channel Impedance: 4.8kΩ for optimal signal conditioning
• Wetting Voltage: 22.5V ±5% with 12.5mA current limiting
• Detection Thresholds: ON >2.25mA (<5.3kΩ), OFF <1.75mA (>8.2kΩ)
• Operating Modes: Dry contact DI (<2Hz) or Pulse Count (0.1Hz to 10kHz, 50µs min pulse width)
• Fault Detection: Optional end-of-line resistor monitoring (short <100Ω, open >75kΩ)
• Power Consumption: 22mA max @ 24VDC, 0.33W heat dissipation
• System Compatibility: DeltaV v11.3.1 or later with SD Plus, SX, SQ, MQ Plus, MQ, MX, PK controllers v14.3+

Global Safety Certifications

Certified for deployment in classified industrial environments worldwide:

• FM/CSA North America: FM 3600, FM 3611 / CSA C22.2 No. 213-M1987, 61010-1
• ATEX/IECEx: Ex ec IIC T4 Gc, Ex ec ic IIC T4 Gc per EN60079-0, EN60079-7, EN60079-15
• CE Compliance: EN 61326-1 (EMC) for industrial electromagnetic compatibility
• Marine Certification: IACS E10, ABS, DNV Marine Certificate for offshore and maritime installations
• Achilles Communication: CIOC Level 1 and CIOC2 Level 2 certified

Industrial Automation Applications

The SE4301T02 excels in diverse discrete signal monitoring scenarios across process industries:

Safety Interlock Systems: Monitor emergency stop buttons, safety gate switches, and pressure relief valve position indicators in chemical processing and pharmaceutical manufacturing. The module's fault detection capability with end-of-line resistors ensures critical safety circuits remain supervised, alerting operators to wiring faults before they compromise safety systems.

Equipment Status Monitoring: Track motor running status, valve limit switches, pump seal failure alarms, and compressor trip conditions. The low-side sensing configuration simplifies wiring in control panels where field devices switch to ground, reducing installation complexity and troubleshooting time.

Flow Metering & Totalizing: Interface with turbine flowmeters, positive displacement meters, and paddle wheel sensors generating pulse outputs up to 10kHz. The configurable pulse counting mode enables accurate flow totalizing for custody transfer, batch control, and consumption monitoring applications.

Production Counting: Connect to proximity sensors, photoelectric eyes, and encoder outputs for parts counting, conveyor tracking, and production rate monitoring in packaging, material handling, and discrete manufacturing operations.

Advanced Signal Processing Features

Engineered for reliability and diagnostic intelligence:

Dual Operating Modes: Software-configurable operation as standard discrete input for slow-changing signals (<2Hz) or high-speed pulse counter (0.1Hz to 10kHz) with 50µs minimum pulse width detection. This flexibility eliminates the need for separate modules for different signal types.

End-of-Line Fault Detection: Optional VS6904 EOL resistor monitoring detects short circuits (<100Ω), normal operation (400Ω to 40kΩ), and open circuits (>75kΩ). This feature enables predictive maintenance by identifying degraded wiring, loose connections, and sensor failures before they cause process disruptions.

Current-Limited Wetting Voltage: The 22.5V wetting voltage with 12.5mA current limiting provides reliable contact wetting for low-energy switches while protecting against short circuits and wiring faults. This design extends contact life and prevents damage to field devices.

Hysteresis for Noise Immunity: The detection thresholds (ON >2.25mA, OFF <1.75mA) provide built-in hysteresis that prevents false triggering from electrical noise, contact bounce, and transient signals common in industrial environments.

Installation & System Integration

Designed for efficient deployment in DeltaV I/O architectures:

• Baseplate Mounting: Installs on standard CHARM Baseplate with DIN rail compatibility (12 CHARMs per baseplate, 8 baseplates per CIOC)
• Terminal Block: Compatible with SE4501 standard CHARM terminal block featuring 4 screw cage terminals (22-14 AWG / 0.32-2.5mm²)
• Self-Keying System: Automatic keying prevents incorrect CHARM type installation, ensuring proper module placement
• Shield Connections: Dedicated shield terminals (1 per channel plus 1 per cable) for optimal EMI/RFI protection
• Environmental Ruggedness: IP20 protection, conformal coating for ISA-S71.04-1985 Class G3 environments
• Operating Range: -40°C to +70°C (-40°F to 158°F), -40°C to +60°C in fanless enclosures

Diagnostic & Status Indication

Real-time operational visibility through intelligent LED indicators:

• Power/Integrity LED (Bi-color): Green Solid (Normal operation), Green Blink (Awaiting configuration), Red Blink (Wiring fault detected), Red Solid (Internal fault requiring replacement)
• Field Signal State LED (Yellow): Illuminates when circuit is energized, providing instant visual confirmation of input status
• DeltaV Integration: Status information propagates to control strategies for automated alarm generation and maintenance notifications

Wiring Configuration Examples

Environmental & Mechanical Specifications

• Operating Temperature: -40°C to +70°C (or -40°C to +60°C in fanless enclosures)
• Storage Temperature: -40°C to +85°C
• Humidity: 5% to 95% RH, non-condensing
• Shock Resistance: 10g, ½ sinewave for 11ms
• Vibration Resistance: 1mm peak-to-peak (2-13.2Hz), 0.7g (13.2-150Hz)
• Contaminant Protection: Conformal coating for ISA-S71.04-1985 Class G3 environments

Why Choose Industrial Control Hub?

Your trusted source for genuine Emerson DeltaV automation components:

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

Related DeltaV Digital Input CHARM Modules

Ordering Information & Accessories

• SE4301T02: DI 24VDC Dry Contact CHARM (this product)
• SE4501: Standard CHARM Terminal Block (4 screw terminals)
• VS6904: End-of-Line (EOL) resistor for fault detection (optional)
• SE4608T01: CHARM Baseplate Assembly for DIN rail mounting

Technical Documentation & Engineering Support

Complete installation manuals, wiring diagrams, control drawings, and configuration guides available upon request. Our application engineering team provides system design consultation, pulse counting setup, fault detection configuration, and troubleshooting assistance for complex DeltaV implementations.

© 2025 INDUSTRIAL CONTROL HUB. All rights reserved.
Original Source: https://www.indctrlhub.com
Contact: sales@indctrlhub.com | +0086 18359243191