Honeywell Safety Manager 2MLK Series Modules – 2MLK-CPUS-CC

Technical Dossier

Product Details And Specifications

Honeywell Safety Manager 2MLK Series Technical Notes

The Honeywell Safety Manager (SM) platform, anchored by the 2MLK series, is a dedicated Safety Instrumented System (SIS) controller certified to IEC 61511 and IEC 61508 SIL 3. It is deployed globally in high-consequence process industries including petrochemical complexes, LNG terminals, nuclear auxiliary systems, offshore platforms, and refinery critical process units. The 2MLK architecture operates as a standalone or integrated safety layer within Honeywell Experion PKS environments, communicating via the FTE (Fault Tolerant Ethernet) backbone. Its modular backplane design supports redundant CPU configurations, distributed I/O expansion, and dedicated communication adapters — making it the reference architecture for safety shutdown, emergency depressurization, and burner management systems (BMS) in facilities requiring continuous SIL 3 integrity.

2MLK Full Catalog & Functionalities (SKU List)

CPU & Controller Modules

• 2MLK-CPUS-CC: Single-slot SIL 3 CPU module, FTE port, 32 MB application memory, primary controller node.
• 2MLK-CPUD-CC: Dual-redundant CPU pair module, hot-standby switchover <100 ms, FTE dual-port.
• 2MLK-CPUQ-CC: Quad-redundant (2oo4) CPU voting module, nuclear-grade fault tolerance, extended diagnostics.
• 2MLK-CPUE-CC: Enhanced CPU with expanded I/O point capacity, supports up to 2048 I/O points per chassis.

Digital Input (DI) Modules

• 2MLK-DIMA-CC: 16-channel 24 VDC digital input, SIL 3, field-side short-circuit detection.
• 2MLK-DIMB-CC: 16-channel 120 VAC digital input, isolated, surge-protected, panel-mount compatible.
• 2MLK-DIMC-CC: 32-channel 24 VDC digital input, high-density, dual-group isolation.
• 2MLK-DIMD-CC: 16-channel dry contact / NAMUR input, intrinsically safe barrier compatible.

Digital Output (DO) Modules

• 2MLK-DOMA-CC: 16-channel 24 VDC digital output, 0.5 A per channel, open-load detection.
• 2MLK-DOMB-CC: 8-channel relay output, SPDT, 5 A @ 250 VAC, solenoid valve drive rated.
• 2MLK-DOMC-CC: 16-channel 24 VDC output, high-current 2 A per channel, motor starter compatible.

Analog Input (AI) Modules

• 2MLK-AIMA-CC: 8-channel 4–20 mA analog input, HART pass-through, 16-bit resolution, SIL 2/3.
• 2MLK-AIMB-CC: 8-channel thermocouple / RTD input, multi-type sensor support, cold junction compensation.

Analog Output (AO) Modules

• 2MLK-AOMA-CC: 8-channel 4–20 mA analog output, HART capable, loop-powered, SIL 2 rated.

Communication & Network Adapters

• 2MLK-FTEA-CC: FTE (Fault Tolerant Ethernet) adapter, dual-port, redundant network path, Experion PKS integration.
• 2MLK-MODA-CC: Modbus RTU/TCP gateway module, serial RS-485, up to 247 node addresses.
• 2MLK-PRFA-CC: PROFIBUS DP master adapter, 12 Mbps, up to 125 slave nodes, GSD file management.

Power Supply Modules

• 2MLK-PWRA-CC: 24 VDC redundant power supply module, 20 A output, hot-swap capable, status relay output.
• 2MLK-PWRB-CC: 120/240 VAC input power supply, 15 A DC output, wide-range input, UPS compatible.