Det-Tronics EQ2100 Modules | EQ2100LC Logic Controller Module

Technical Dossier

Product Details And Specifications

Det-Tronics EQ2100 Series: Comprehensive Module Range and Technical Overview

The Det-Tronics EQ2100 is a modular flame and gas detection control system engineered for continuous-duty deployment in high-consequence industrial environments, including petroleum refineries, offshore platforms, chemical processing plants, LNG terminals, and nuclear facility auxiliary systems. The system architecture is built around a central logic controller — the EQ2100LC — supported by a distributed array of input/output modules, power supplies, and communication interfaces. Its field-proven reliability has made it a reference standard for SIL-rated safety instrumented systems (SIS) across North America, the Middle East, and Southeast Asia. The EQ2100 platform supports up to 32 field devices per controller loop and is compatible with Det-Tronics' broader Eagle Quantum Premier (EQP) ecosystem, enabling hybrid installations where legacy EQ2100 hardware coexists with next-generation controllers.

The Evolution of EQ2100 Architecture

The EQ2100 platform was introduced by Det-Tronics (a subsidiary of Detector Electronics Corporation, now part of UTC Fire & Security / Carrier Global) as a successor to earlier relay-logic-based detection panels. Its architecture transitioned the industry from hardwired relay matrices to a microprocessor-controlled, addressable loop topology. Early revisions (Rev A/B) supported analog 4–20 mA field devices exclusively. Subsequent firmware revisions introduced digital HART communication compatibility, enabling remote diagnostics without loop interruption. The mid-generation hardware refresh introduced the EQ2100LCII variant with expanded memory and dual-redundant power input. As the platform matured into the 2010s, Det-Tronics positioned the Eagle Quantum Premier (EQP) as the forward migration path, while continuing to manufacture and support EQ2100 spares for installed base continuity. As of 2026, the EQ2100 series is in the mature/end-of-active-development phase; Det-Tronics no longer introduces new module variants, but factory repair, certified refurbishment, and third-party lifecycle support remain available. Facilities operating EQ2100 systems should maintain a documented spare parts inventory strategy, as lead times for original modules have extended significantly.

EQ2100 Full Catalog & Functionalities (SKU List)

Logic Controllers & CPUs

• EQ2100LC: Central logic controller module; manages loop polling, alarm logic, and system I/O coordination.
• EQ2100LCII: Second-generation logic controller with expanded SRAM, dual power input terminals, and enhanced diagnostics.
• EQ2100LCR: Redundant logic controller module for hot-standby configurations in critical SIS applications.

Analog Input Modules (AI)

• EQ2100AI4: 4-channel analog input module; accepts 4–20 mA signals from combustible gas or toxic gas detectors.
• EQ2100AI8: 8-channel analog input module; high-density field wiring for large-loop installations.
• EQ2100AI4H: 4-channel analog input with HART pass-through; supports remote device configuration via HART protocol.

Digital Input Modules (DI)

• EQ2100DI8: 8-channel digital input module; monitors discrete alarm contacts from flame detectors and manual call points.
• EQ2100DI16: 16-channel digital input module; high-density discrete monitoring for large panel configurations.
• EQ2100DI8S: 8-channel supervised digital input; line-fault detection on each channel for SIL-2 loop integrity.

Digital Output Modules (DO)

• EQ2100DO8: 8-channel digital output module; drives relay-based suppression, ventilation, and alarm annunciator circuits.
• EQ2100DO8R: 8-channel relay output module with individually isolated Form-C contacts; rated 5 A resistive per channel.
• EQ2100DO4H: 4-channel high-current digital output; supports solenoid valve actuation up to 2 A per channel.

Communication & Network Adapters

• EQ2100MB: Modbus RTU communication adapter; enables integration with DCS/SCADA via RS-485 serial link.
• EQ2100DP: PROFIBUS DP communication module; supports cyclic data exchange with Siemens and ABB DCS platforms.
• EQ2100EN: Ethernet/IP communication module; provides TCP/IP connectivity for modern plant historian and OPC-DA integration.

Power Supply Modules

• EQ2100PS24: 24 VDC system power supply module; 10 A output with battery-backed UPS input for panel continuity.
• EQ2100PSR: Redundant power supply module; hot-swappable design for zero-downtime power maintenance.

Sourcing Hard-to-Find & Obsolete EQ2100 Parts

DriveKNMS maintains a dedicated inventory program for the Det-Tronics EQ2100 series, specifically targeting modules that have been discontinued from the OEM's active production schedule. Our sourcing network spans certified industrial surplus channels, decommissioned plant asset recovery, and factory-authorized refurbishment partners. For end-users operating EQ2100 systems beyond the OEM's active support window, DriveKNMS provides: (1) verified-functional pull-out units with full operational test documentation; (2) board-level repair services for logic controller and I/O modules with traceable component replacement records; (3) cross-reference mapping to Eagle Quantum Premier (EQP) equivalents for facilities planning a phased migration. All sourced units are shipped with a 12-month functional warranty and full traceability documentation. Inquiries for bulk spare parts packages — including multi-module kits for annual maintenance contracts — are handled directly by our technical sales team.

Quality Control for the EQ2100 Range

The EQ2100 platform's backplane bus architecture and addressable loop communication protocol require a structured, multi-stage test procedure that goes beyond basic power-on verification. DriveKNMS applies the following protocol to all EQ2100 modules prior to shipment: Stage 1 — Visual & Physical Inspection: PCB examination for corrosion, cold solder joints, damaged bus connectors, and capacitor degradation. Stage 2 — Powered Bench Test: Module is installed in a live EQ2100 test chassis and polled by the logic controller to verify correct address recognition and data exchange. Stage 3 — I/O Channel Verification: Each analog input channel is stimulated with a calibrated 4–20 mA source; each digital output is exercised through its full switching cycle. Stage 4 — Communication Protocol Test: For communication modules (Modbus, PROFIBUS, Ethernet/IP), a full register read/write cycle is executed against a reference master device. Stage 5 — Burn-In: Modules are operated continuously for 48 hours at elevated ambient temperature (50°C) to screen for early-life component failures. Test records are retained and available upon request.