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- Honeywell
- MC-TDOR22 51309150-175
- Relay Digital Output Module
- USA
- 245 × 115 × 25 mm
- 0.45 kg
- Xiamen, China
- New & In Stock
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Product Overview
The Honeywell MC-TDOR22 (51309150-175) is a relay-based digital output module used in Honeywell distributed control systems (DCS). It is designed to provide electrically isolated switching for field devices such as solenoid valves, alarms, motors, and control relays.
Unlike transistor-based output modules, this unit uses electromechanical relay contacts, allowing it to switch both AC and DC loads with higher flexibility and robust isolation, making it suitable for industrial process control applications.
Technical Specifications
| Parameter | Details |
|---|---|
| Manufacturer | Honeywell |
| Model | MC-TDOR22 |
| Part Number | 51309150-175 |
| Product Type | Relay Digital Output Module |
| Output Type | Electromechanical relay outputs |
| Channel Capacity | 8 to 16 channels (configuration dependent) |
| Rated Load | Up to 240 VAC / 125 VDC (system dependent) |
| Output Function | ON/OFF discrete control switching |
| Isolation | Channel-to-channel and system isolation |
| Contact Type | Relay (Form A / Form C depending on configuration) |
| Response Time | Millisecond-level switching |
| Mounting Method | Rack-mounted module |
| Application | Industrial automation and process control |
| Dimensions | 245 × 115 × 25 mm |
| Weight | 0.45 kg |
Function and Working Principle
The MC-TDOR22 functions as an output switching interface between the control system and field devices:
- The DCS controller sends ON/OFF commands to the module.
- Internal electronics route signals to relay driver circuits.
- Relays physically open or close electrical contacts.
- Field devices such as valves, alarms, or motors are activated or deactivated.
- Electrical isolation protects the control system from field-side faults and surges.
This relay-based structure allows safe switching of higher-voltage and inductive loads.
Key Features
- Relay-based digital output switching
- Supports AC and DC load control
- Strong electrical isolation for system protection
- Suitable for inductive and resistive loads
- Industrial-grade robust construction
- High reliability in harsh environments
- Easy integration with Honeywell DCS systems
- Suitable for continuous 24/7 operation
Industrial Applications
- Oil and gas production systems
- Petrochemical processing plants
- Power generation stations
- Chemical manufacturing industries
- Water and wastewater treatment systems
- Refinery automation systems
- Industrial machinery control
- Alarm and safety interlock systems
- Process control systems
Installation
The module is installed in a Honeywell control cabinet as part of the DCS I/O subsystem.
Installation Steps
- Mount the module in the designated rack slot
- Connect system-side output wiring from the controller
- Connect field wiring to relay output terminals
- Ensure proper grounding and shielding
- Perform functional testing and loop checks
Compatible Components
| Component | Description |
|---|---|
| Honeywell Controllers | Generate output control logic |
| Field Devices | Solenoids, motors, alarms, actuators |
| I/O Termination Assemblies | Field wiring interface modules |
| Control Cabinets | System housing and protection |
| Power Supply Systems | Provide stable control voltage |
Alternative Models
| Model | Description |
|---|---|
| MC-TDOD54 | Digital Output Module |
| MC-TDOD14 | Digital Output FTA |
| MC-TDOR12 | Relay Digital Output FTA |
| MC-TAOX01 | Analog Output Terminal Module |
Advantages
- High flexibility for AC/DC switching
- Strong isolation improves system safety
- Reliable operation under industrial conditions
- Handles inductive and resistive loads
- Reduces risk to control electronics
- Easy maintenance and replacement
- Suitable for safety-critical applications
- Long operational lifespan
Frequently Asked Questions
What is the main function of MC-TDOR22?
It provides relay-based ON/OFF switching to control field devices in Honeywell automation systems.
What types of loads can it handle?
It can switch both AC and DC loads, including motors, solenoids, and alarms.
Why use relay outputs instead of transistor outputs?
Relays provide physical isolation and higher load-handling capability.
Where is it commonly used?
It is widely used in oil & gas, power plants, chemical industries, and industrial automation systems.
Conclusion
The Honeywell MC-TDOR22 (51309150-175) Relay Digital Output Module is a robust industrial switching component designed for reliable control of field devices in distributed control systems. With its compact size (245 × 115 × 25 mm), lightweight design (0.45 kg), and relay-based isolated architecture, it delivers safe and flexible output control for demanding industrial applications.