Overview
The Honeywell MC-TDOY22 80366183-175 / 51204162-175, also cataloged as the MC-TDOY22 Digital Output Field Termination Assembly, provides physical termination and distribution for 32 discrete output channels in compatible Honeywell DCS I/O configurations.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | MC-TDOY22 |
| Brand | Honeywell |
| Product Type | Digital Output Field Termination Assembly (FTA) |
| Part Number | 80366183-175 |
| Alternate Part Number | 51204162-175 |
| System Compatibility | Honeywell MU/MC-PDOY22 I/O Processors only |
| Number of Output Channels | 32 isolated channels |
| Nominal Load Voltage | 15 to 30 VDC |
| Output Current | Up to 500 mA per point |
| Isolation | Optical isolation from subsystem/common |
| Terminal Type | Compression-type or screw-type terminal blocks, depending on sub-version |
| Environmental Protection | Conformal coated |
| Compliance | CE |
| Brand | Honeywell |
| Weight | 0.55 kg |
Honeywell DCS Digital Output Interface
The MC-TDOY22 terminates discrete output wiring between the compatible Honeywell I/O processor and field devices. It supports 32 isolated output channels, with each point accepting a nominal load voltage from 15 to 30 VDC and an output current up to 500 mA.
The optical isolation separates the output channels from the subsystem/common reference. Therefore, field wiring should follow the applicable Honeywell I/O architecture and grounding scheme.
Although Honeywell process-control platforms may also support 4-20 mA HART, FOUNDATION Fieldbus, or Profibus PA interfaces, this assembly is specifically a discrete output termination device. Those analog and fieldbus protocols do not define the MC-TDOY22 output interface.
Frequently Asked Questions
Q: How many discrete output channels does the MC-TDOY22 provide?
A: The assembly provides 32 isolated discrete output channels.
Q: What field voltage and current does each output support?
A: The supplied specifications state a nominal load voltage of 15 to 30 VDC and a maximum output current of 500 mA per point.
Q: Does the MC-TDOY22 provide channel isolation?
A: Yes. The supplied data specifies optical isolation from the subsystem/common.
Field Installation Guidelines
- Verify the MC-TDOY22 part number against the approved Honeywell system configuration before installation.
- Confirm compatibility with the specified MU/MC-PDOY22 I/O processor.
- De-energize the relevant output circuit before terminating or removing field wiring.
- Route discrete output wiring separately from high-energy power conductors where practical.
- Maintain clear identification for all 32 output channels during cabinet wiring and commissioning.
- Connect cable shields according to the project grounding specification and Honeywell installation documentation.
- Avoid excessive conductor tension at compression-type or screw-type terminals.
- Verify field-device polarity and load requirements before applying output power.
- Inspect terminal tightness and wiring segregation during commissioning.
- Do not exceed the specified 500 mA maximum output current per point.
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