Model Number Explanation

51204145: Honeywell TPS/Experion DCS digital input FTA series

125: Variant with 32‑channel, 24VDC, screw terminals, CE compliant, non‑redundant

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

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 MU‑TDIY62 IOP

Redundancy: Non‑redundant (pair with 51204145‑175 for 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)

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

Compatibility

IOP Partner: MU‑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