Honeywell MC-TDOY23 80366189-175 Digital Output Relay Module

This module provides 16 independent relay outputs for switching AC and DC loads. Each channel features a Form C (SPDT) relay contact for flexible control configurations. Engineers use this unit to interface with motor starters, solenoids, and alarm devices. The design emphasizes high current capacity and long mechanical relay life. Its compact rack-mountable format suits Honeywell Experion PKS and TDC 3000 systems.

Output Channel Architecture

The MC-TDOY23 80366189-175 offers 16 Form C relay outputs with individually isolated contacts. Each relay provides normally open and normally closed terminals for versatile wiring options. The module groups outputs into two banks of eight for organized field cabling. Every channel includes a dedicated LED indicator for immediate visual status verification. This design enables quick identification of active outputs during system commissioning.

Contact Ratings and Switching Capacity

Each relay contact handles 2 A at 240 VAC or 2 A at 30 VDC resistive loads. The contacts support inrush currents up to 5 A for short-duration motor starting. Maximum switching power reaches 480 VA for AC loads or 60 W for DC loads. Contact resistance measures less than 100 mΩ for efficient power transfer. Furthermore, the relays provide mechanical life exceeding 10 million operations.

Protection and Suppression Features

Every output channel includes built-in snubber circuits for arc suppression. The module provides back-EMF protection for inductive DC load applications. Each relay incorporates a mechanical flag indicator for visual confirmation of contact position. Redundant isolation barriers separate field circuits from the backplane logic. These protective features ensure reliable switching and extended contact life.

Physical Dimensions and Rack Mounting

The MC-TDOY23 80366189-175 measures 12.7 cm in width, 25.4 cm in height, and 20.3 cm in depth. It weighs approximately 1.6 kg, which reflects the substantial relay assembly. A steel housing with ventilated panels provides effective thermal management. The unit mounts directly into Honeywell Experion PKS or standard 19-inch racks. Its front panel locates all output terminals and status indicators for convenient accessibility.

Connector Interfaces and Field Wiring

A 48-pin barrier-style terminal block handles all output wiring on the front face. This terminal block accepts wire gauges from 0.5 mm² to 2.5 mm² for secure terminations. Separate terminals provide common, normally open, and normally closed connections per channel. The module includes dedicated grounding terminals for cable shield termination. Strain relief clamps protect field wiring from vibration-induced movement and disconnection.

Internal Components and Power Consumption

The printed circuit board contains 16 electromechanical relays, 16 optocouplers, and 16 snubber circuits. The module draws 200 mA from the 5 VDC backplane under full operational load. It also requires 100 mA from the external 24 VDC supply for relay coil excitation. Optical isolation provides 1500 VAC separation between control circuits and relay contacts. No energy storage devices exist on this purely electromechanical assembly.

Status Indication and Monitoring

Sixteen front-panel LEDs indicate the real-time status of every output channel. Green LEDs confirm relay energization while amber LEDs indicate mechanical flag positions. The module transmits diagnostic data to the controller during each scan cycle. This data includes relay status and fault history information. Maintenance personnel can verify proper operation without external measurement tools.

Environmental Specifications and Compliance

The MC-TDOY23 80366189-175 operates reliably across temperatures from 0°C to 55°C. It withstands humidity levels up to 95% non-condensing without performance degradation. The module complies with IEC 61000-4-2 for electrostatic discharge immunity. Vibration tolerance meets IEC 60068-2-6 requirements for industrial installations. This robust construction suits chemical processing, power generation, and refinery automation applications.

Technical Data Sheet – Honeywell MC-TDOY23 80366189-175