Description
Product Overview
The Honeywell MC-PDOX02 is a 16-channel Digital Output Input/Output Processor designed for Honeywell Process Manager and High-Performance Process Manager control architectures. It receives discrete output commands from the control system and transfers them through the associated field termination hardware to external devices. Typical applications include switching control signals for relays, solenoid circuits, alarms, and other discrete field loads, depending on the selected FTA and its electrical configuration.
The MC-PDOX02 operates as part of a defined I/O assembly rather than as a standalone universal output card. Honeywell documentation identifies it as a Digital Output IOP, while the associated FTA determines the field-side output arrangement. Documented compatible termination assemblies include non-isolated 24 VDC digital output FTAs and other output configurations. Some isolated 24 VDC FTA arrangements provide optical isolation between the output drivers and the PM, APM, or HPM common. The output interface must therefore be checked against the installed termination assembly before connecting field loads.
The Honeywell MC-PDOX02 51304487-150 is the conformally coated CE-compliant version. The corresponding standard, non-conformally coated model is identified as MU-PDOX02, part number 51304487-100. This distinction matters when maintaining cabinets with specified coating and compliance requirements. The MC-PDOX02 is also different from the MC-PDOY22, which is a separate 32-channel digital output model. Matching the complete model and part number helps avoid incorrect substitutions during maintenance procurement.
Product Introduction (Non-Templated)
A digital output fault can affect equipment commands, valve actuation, alarm circuits, and other discrete control functions. When troubleshooting an HPM cabinet, it is important to distinguish an IOP failure from a fault in the associated FTA, field wiring, or connected load.
The MC-PDOX02 provides 16 output channels, but the actual electrical behavior is determined by the installed output termination arrangement. Before replacing the processor, verify the FTA model, output voltage class, load current, and wiring configuration. A card with the correct channel count may still be unsuitable for a different output circuit.
Key Technical Specifications
| Parameter | Value |
|---|---|
| Product Model | MC- |
| Part Number | 51304487-150 |
| Manufacturer | Honeywell |
| Product Type | Digital Output IOP |
| System Family | Process Manager / High-Performance Process Manager |
| Signal Type | Digital Output |
| Output Channels | 16 |
| Assembly Version | Conformally coated |
| Compliance | CE-compliant |
| Standard Model Equivalent | MU- |
| Standard Model Part Number | 51304487-100 |
| Output Circuit | Depends on compatible FTA |
| Compatible FTA Types | Includes 24 VDC non-isolated DO and other documented DO configurations |
| Output Driver Architecture | Open-collector, current-sinking drivers are documented for applicable configurations |
| Isolated Output Capability | Supported through specified isolated 24 VDC DO FTAs |
| Maximum Load Current | Up to 500 mA at 24 VDC for the documented isolated 24 VDC FTA arrangement; verify exact FTA |
| Redundant Operation | Not supported |
| Communication Interface | Internal Honeywell I/O architecture |
| Firmware Revision | Not verified |
| Operating Temperature | Not verified for this exact assembly |
| Protection Rating | Not verified |
MC-PDOX02-51304487-150
Major Features and Advantages
16-channel digital output control
The MC- provides 16 discrete output channels within one Honeywell I/O processor. This arrangement supports grouped control functions while keeping output processing within the established Process Manager I/O architecture.
Compatibility with multiple output FTA arrangements
The family supports different field termination configurations. These include 24 VDC non-isolated digital output FTAs and specified isolated output arrangements. The connected FTA determines the field-side circuit behavior, so the IOP and FTA must be evaluated together.
Open-collector output architecture
The documented output drivers are current-sinking open-collector transistors connected to logic ground. This is an important electrical distinction when checking load polarity and external supply wiring. Do not assume sourcing output behavior or apply field voltage without confirming the applicable FTA circuit.
Isolated field-output arrangements
For specified isolated 24 VDC output FTAs, the output drivers are optically isolated from the PM, APM, or HPM common. The documented load capability for that arrangement is up to 500 mA at 24 VDC. This value should not be generalized to every FTA supported by the .
Conformal coating
The MC version is the conformally coated assembly. The coating provides additional protection against humidity and certain chemical-gas exposure. It does not replace cabinet environmental controls or establish a specific enclosure IP rating.
CE-compliant hardware identification
Honeywell’s hardware planning table maps MC- to CE-compliant part number 51304487-150. The corresponding non-CE model designation is not listed as an alternative for this exact MC version; the standard MU- uses part number 51304487-100.
Defined redundancy limitation
The MC- is listed as not supporting redundancy. If the application requires redundant output processing, verify the system design and approved hardware alternatives rather than assuming a second card can be configured as a redundant partner.
Related Products
These Honeywell modules and termination assemblies are associated with the same general I/O architecture. They are not all direct replacements.
- MU- – 51304487-100: Standard, non-conformally coated 16-channel digital output IOP.
- MC-PDOY22 – 80363975-150: Conformally coated 32-channel digital output IOP.
- MC-PDIX02 – 51304485-150: Conformally coated digital input IOP.
- MC-PDIY22 – 80363972-150: Conformally coated 24 VDC digital input IOP.
- MC-PDIS12 – 51402625-175: Digital input sequence-of-events IOP.
- MU-TDOA13: Digital output field termination assembly.
- MU-TDOA53: Digital output field termination assembly.
- MU-TDOD13: Digital output field termination assembly.
- MU-TDOD23: Digital output field termination assembly.
- MU-TDOD53: Digital output field termination assembly.
Frequently Asked Questions
Q1: What is the Honeywell MC- used for?
It is a 16-channel digital output processor in the Honeywell Process Manager / HPM I/O architecture. It transfers discrete control commands to field devices through compatible FTAs.
Q2: How many output channels does the MC- provide?
It provides 16 digital output channels. The field-side electrical configuration depends on the connected FTA.
Q3: Is the MC- a 24 VDC output module?
It can be used with specified 24 VDC digital output FTAs, including non-isolated and isolated configurations. However, it is not limited to one universal 24 VDC output circuit. Check the exact FTA model, output polarity, load supply, and current requirement before wiring.
Q4: What is the difference between MC- and MC-PDOY22?
The MC- is a 16-channel digital output IOP with part number 51304487-150. The MC-PDOY22 is a separate 32-channel digital output IOP with part number 80363975-150. Their channel counts and hardware identities differ, so they should not be treated as direct substitutes.
Q5: Can the MC- be used in a redundant configuration?
The documented specification lists redundancy as unsupported for this model. Check the system architecture before planning a redundant output arrangement.
Q6: Can I hot-swap the MC- while the system is running?
Do not assume hot-swap capability. Confirm the applicable HPM maintenance procedure, I/O configuration, and process impact before removing the processor. Outputs may change state or become unavailable during replacement, so the controlled equipment must be placed in an approved maintenance condition.
Q7: Does the MC- support firmware v3.1?
A specific firmware v3.1 requirement or compatibility statement has not been verified. Confirm the installed HPM hardware revision and system software requirements using the applicable Honeywell documentation.
Procurement and Compatibility Note
When requesting a replacement, specify the complete identification:
Honeywell MC- – 51304487-150 – 16-Channel Digital Output IOP – Conformally Coated, CE-Compliant.
Ask for photographs of the product label, PCB, connector area, and revision markings. For used or refurbished stock, request a functional test report that identifies the tested output channels and test conditions.
The main compatibility risk is the FTA interface. Confirm whether the installed system uses non-isolated 24 VDC outputs, isolated 24 VDC outputs, or another supported output arrangement. Check load current, polarity, external supply wiring, and the redundancy requirement before installing the replacement.
