The Honeywell MU‑TDID72 (51303928‑100) is a 32‑point 24 V DC digital input Field Termination Assembly (FTA) used in Honeywell TPS/Process Manager systems. It collects on‑site digital signals—such as switches, sensors, or status devices—and relays them to the controller with optical/galvanic isolation, ensuring reliable monitoring and protection of industrial processes.

Key Features

• Supports up to 32 digital input channels at 24 VDC

• Optical isolation with 1500 VAC/±1500 VDC isolation between field and controller

• Fast sensing with ≤ 3.6 ms filter‑to‑logic response time

• Surge protection compliant with ANSI/IEEE C37.90.1‑1978

• Handles DC signals from 0 Hz up to 15 Hz (for pulse counting)

• Compact modules sized B or C with screw or compression connectors

• Rugged design suited for hazardous and industrial environments

Technical Specifications

Typical Applications

• Monitoring of field devices: switches, valves, pressure or level alarms

• Input for alarm/trip logic in TPS or DCS systems (Honeywell TPS, APM, HPM, EHPM)

• Event-counting input for status indicators or low-speed sensors

• Suitable for hazardous industrial zones due to galvanic isolation

• Ideal for retrofit and replacement in existing Honeywell input cabinets

Product Advantages

• Large Input Capacity: Supports 32 discrete 24 V signals per module, saving rack space

• High Isolation: 1500 VAC/DC isolation ensures field-to-cabinet safety and low noise

• Fast Response: Sub‑4 ms throughput suitable for control applications

• Rugged and Reliable: Surge-resistant and built for harsh environments

• Rapid Installation: Modular FTA design with screw and compression terminations

• System Compatibility: Integrates seamlessly with Honeywell TPS, APM/HPM modules

• Certified Build: Meets international EMC and environmental standards

• OEM Support: Honeywell heritage quality with worldwide technical support

Frequently Asked Questions (FAQ)

1. How many inputs does it support?

   32 digital input channels at 24 V DC.

2. What isolation does it provide?

   1,500 VAC rms or ±1,500 V DC optical/galvanic isolation between field and controller.

3. What is the response time?

   ≤ 3.6 ms from input filter to logic level.

4. Which voltages are supported?

   Designed for 24 VDC nominal (range 18–30 V).

5. Can it handle pulses?

   Yes — supports DC to 15 Hz signals and event counting functions.

6. What surge protection is included?

   Meets ANSI/IEEE C37.90.1‑1978 surge withstand standards.

7. What are the physical dimensions?

   FTA size C max length ~462 mm (~18.2″) — consult FTA Table.

8. Is it CE and RoHS certified?

   Yes, per distributor data — varies by region.

9. How is it mounted?

   Mounted via standard DIN rails/channels using compression or screw terminals.

10. What systems is it compatible with?

    Honeywell TPS, Zeeeco, APM, HPM, and EHPM systems — intended for use with Honeywell I/O processors.