Model Explanation

51309154-175: Honeywell Part Number

MU-TDOR28: Module Model

MU = Module Unit (FTA Series)

TDOR = Total Digital Output Relay (Relay Output)

28 = Hardware Version and Channel Configuration Variant (Compared to Version 27, optimized contact life and surge suppression) Technical Specifications

Channel: 16 independent relay outputs (each channel has 1 normally open + 1 normally closed, Form C)

Contact capacity:

AC: 120/240 VAC, 5 A (resistive)

DC: 24 VDC, 5 A (resistive)

Isolation: 1500 V RMS (between channels, between channels and bus, mechanical isolation)

Response time: ≤ 10 ms (mechanical relay)

Switching frequency: Maximum 10 Hz

Power supply: Backplane 24 VDC

Operating temperature: -20°C ~ +70°C

Hot-swappable: Supported

Fault detection: Open circuit / short circuit (system diagnosis)

Relay life: ≥ 150,000 times (resistive load, 50% improvement compared to version 27)

Interface and status

System side: High-density flat cable connection I/O module

Field side: Removable heavy-duty screw terminals (facilitating wiring and maintenance)

Indicators: On/Off status lights for each channel, module OK/Fault fault lights

Configuration: DCS workstation software configuration, supports individual enabling/disabling of channels

Core functions

Mechanical relay true isolation: Contacts are completely isolated when disconnected, resistant to high voltage surges and ground loop interference, high safety

Common AC/DC industrial load compatibility: Compatible with AC 120/240V, DC 24V, universal industrial loads, strong versatility

Medium power circuit control: Electromagnetic valves, contactors, small motors, alarm lights, conventional heaters

Long-life stable output: Optimized relay contact material, longer lifespan, suitable for long-term continuous operation

Online replacement (hot-swappable): Supports maintenance without downtime, ensuring production continuity

System-level precise diagnosis: Real-time detection of open circuit / short circuit faults, rapid problem location Applicable scenarios

Industry: Oil and gas, petrochemicals, power generation, metallurgy, water treatment, chemicals

Applications: Loads requiring electrical isolation, AC/DC mixed control, medium power circuits, non-high-frequency conditions

Compatibility: Experion PKS (C200/C300), TDC 3000, TPS