Emerson SS4301T02 DeltaV CHARM DI 24V DC Low-Side Sense Module

Product Overview

• The Emerson SS4301T02 is a high-performance Discrete Input (DI) Characterization Module.
• It belongs to the DeltaV S-series electronic marshalling platform.
• This SS4301T02 module excels in sensing 24V DC low-side (dry contact) signals.
• Engineers use it to simplify wiring and enhance diagnostic visibility in automation environments.
• It provides reliable field circuit protection through integrated current limiting features.

Technical Specifications

• Brand: Emerson
• Model: SS4301T02
• Series: DeltaV CHARM S-Series
• Module Type: Low-Side Sense (Dry Contact) Discrete Input
• Measurement Range: 24V DC Nominal Logic
• Detection Level (ON): > 2.25 mA (Resistance < 5.3 kΩ)
• Detection Level (OFF): < 1.75 mA (Resistance > 8.2 kΩ)
• Frequency Response: Optimized for states changing < 2 Hz
• Wetting Voltage: 22.5V DC (± 5%)
• Current Limit: 12.5 mA Nominal
• Channel Impedance: 4.8 kΩ
• Power Requirements: 18 mA Maximum @ 24V DC
• Heat Dissipation: 0.33 Watts
• Environmental Tolerance: Designed for harsh industrial cabinets
• Anti-Interference: Integrated electromagnetic shielding and signal filtering

Diagnostic Capabilities

• The SS4301T02 supports advanced loop monitoring via an optional resistor pack.
• Short Circuit Detection: Guaranteed detection at < 100 Ω
• Open Circuit Detection: Guaranteed detection at > 75 kΩ
• Operational Integrity: Guaranteed good status between 400 Ω and 40 kΩ
• Visual Indicators: Real-time LED status for channel health and logic state.

Installation and Compatibility

• Compatibility: Exclusively for Emerson DeltaV Electronic Marshalling systems.
• Mounting: Plugs directly into the CHARM terminal block without tools.
• Wiring: Supports standard field wiring disconnect functionality for maintenance.
• System Fit: Fits seamlessly into standard DeltaV I/O configurations.

Global PLC Spare HUB Review

• The Emerson SS4301T02 represents a shift toward flexible I/O density.
• We recommend this module for facilities requiring individual channel isolation.
• The low-side sensing architecture effectively interfaces with specialized industrial sensors.
• It ensures high signal integrity while minimizing heat buildup in control rooms.

Typical Application Scenarios

• Process manufacturing safety interlocks and alarms.
• Remote terminal unit (RTU) monitoring for utilities.
• Industrial pump and motor status feedback loops.
• Material handling limit switch integration for conveyors.

Shipping and Support

• Warranty: 12-month comprehensive warranty coverage included.
• Dispatch: Fast 24-48 hour shipping from our central hub.
• Logistics: Worldwide express delivery via FedEx, UPS, or DHL.
• Package Contents: One SS4301T02 module in secure industrial packaging.

Purchasing Guide

• Verify your DeltaV firmware supports S-series CHARMS.
• Determine if your field sensors require low-side sensing logic.
• Order the optional field resistor pack for full fault monitoring.
• Confirm the 2 Hz frequency limit meets your specific process speed.

Frequently Asked Questions

• Does this module require a separate power supply for the field sensors?
• No, the SS4301T02 provides a 22.5V wetting voltage directly.


• Can I detect a broken wire without extra hardware?
• You must install a field resistor pack to enable open-circuit detection.


• How does the current limiting protect my system?
• The internal circuit limits current to 12.5 mA during shorts.


• What is the advantage of low-side sensing in this module?
• It allows for specific grounding configurations common in specialized sensor arrays.


• How do I identify a faulty module in a full rack?
• Check the onboard LED indicators for red fault status immediately.

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