Model Number Explanation

• 51204145: Honeywell TPS/Experion DCS digital input FTA series

• 175: Variant with 32‑channel, 24VDC, screw terminals, CE compliant, redundant

• MC‑TDIY62: DCS catalog designation (Digital Input FTA, 32ch, 24V, redundant)

Technical Specifications

• Channel Count: 32 digital input channels (single‑ended)

• Input Voltage: 24VDC (15–30VDC operating range)

• Input Logic: Source/sink configurable; ON ≥13VDC / ≥3mA; OFF ≤5VDC / ≤1mA

• Isolation: Optical isolation per channel; 30VAC / ±42.4VDC channel‑to‑chassis

• Termination: Screw terminals (field side); 2×50‑pin backplane connector (IOP side)

• LED Indicators: Power, Fault, 32× Channel Status (ON/OFF)

• Surge Protection: ANSI/IEEE C37.90.1 compliance

• Operating Temperature: 0°C to +60°C

• Storage Temperature: −40°C to +85°C

• Humidity: 5%–95% non‑condensing

• Dimensions: ≈305 × 81 × 13 mm

• Weight: ≈0.73 kg

• Certifications: CE, UL 508, RoHS

Interface & Configuration

• Field Wiring: Front‑panel screw terminals (32 inputs + common)

• Backplane Connection: Two 50‑pin ribbon connectors to MC‑TDIY62 IOP

• Redundancy: Redundant (pair with another 51204145‑175 for 1:1 redundant FTA)

• Diagnostics: Channel open/short detection, supply voltage monitoring

Key Features

• 32‑Channel High Density: Compact 32‑point DI interface for 24VDC field devices

• Optical Isolation: Per‑channel isolation for noise immunity and safety

• Screw Terminals: Easy field wiring and maintenance

• LED Status: Visual indication for power, fault, and each channel

• Surge Protection: Withstands industrial transients and EMI

• Coated PCB: Conformal coating for harsh environments (dust, moisture)

• Redundancy Support: Designed for redundant system architectures (unlike 51204145‑125)

Applications

• Systems: Honeywell TDC3000/TPS, Experion PKS C200/C300, FSC safety systems

• Industries: Oil & gas, chemical, power generation, pharmaceuticals, pulp & paper

• Use Cases: Valve position switches, limit switches, pressure/flow alarms, ESD inputs

• Redundant I/O: Critical safety and control loops requiring high availability

Compatibility

• IOP Partner: MC‑TDIY62 Digital Input Processor (51204145 series)

• Racks: Honeywell TPS 8‑slot/16‑slot I/O racks, Experion PKS I/O racks

• Firmware: TPS ≥ R500; Experion PKS ≥ R510