Honeywell MC2-440-10TVB-1-21

Product Introduction:

The Honeywell MC2-440-10TVB-1-21 is a legacy module from Honeywell’s TDC 3000 / Universal Control Network (UCN) I/O family — typically a 10-channel analog or trip/bi-stable vote module used in turbine protection or process I/O racks (such as the MC (Multifunction Controller) or TPS system). Exact channel count and I/O type can vary with the “-10TVB” suffix indicating Trip/Vote/Bistable logic capability. It interfaces to the UCN via an I/O Link Processor (IOLP) or directly in UCN I/O extenders.

Category: Honeywell

Description

Representative Specifications:

Manufacturer: Honeywell (Process Solutions — Legacy TDC 3000 / UCN)
Model: MC2-440-10TVB-1-21
System: TDC 3000 UCN / TPS (Total Plant Solution) — connects via PM-I/O or HIU (Highway Interface Unit)
Function: 10-point Trip / Vote / Analog input or output (version-dependent); often used for turbine protective trip voting
Signal Types: 4–20 mA (AI/AO version) or Dry Contact / 24 VDC (Trip DI version)
Voting Logic: 1oo2, 2oo3 programmable in associated function block (trip modules)
Isolation: Field-to-system optical isolation
Backplane Supply: +5 VDC / +24 VDC from I/O rack
Operating Temp: 0 °C to +60 °C
Diagnostics: Module health LED; fault reported to HM (History Module) / US (Universal Station)
Certifications: FM / CSA Div.2; CE (legacy)

Functional Features:

Supports 2oo3 (two-out-of-three) hardware/voted trip schemes for turbine overspeed protection
Self-test on channel integrity; forces trip on loss of communications if configured
Compatible with Honeywell SFM (Smart Field Multiplexer) or UCN I/O expanders

Application Scenarios:

Steam / Gas turbine protection systems (Turbine Supervisory Instrumentation integration)
Critical process interlock voting in refinery units
Legacy TDC 3000 plant I/O modernization spares

Material & Structure:

Legacy metal/plastic edge-card module (≈ double Eurocard size)
Front-panel test points / LEDs
Connects to field termination through TB unit (e.g., TB-3000 series)

Installation & Notes:

Only install with correct UCN Node Address / Slot ID configured in Engineering Station
Trip modules must be functionally tested (pushbutton test) after installation per site SIS proof-test procedure
Spare parts should match firmware revision to avoid compatibility issues

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