Det-Tronics EQ2100LC Logic Controller Module

Technical Dossier

Product Details And Specifications

Det-Tronics EQ2100 Series Technical Notes

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.

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