Overview
Configured for digital output signal termination and field-device switching in Honeywell DCS architectures, the Honeywell MC-TDON12 51304446-150 (MC-TDON12 Digital Output Field Termination Assembly) provides direct physical and electrical execution. The assembly interfaces Digital Output Processor signals with external 24 VDC field circuits and supports up to 32 non-isolated output channels for low-power loads such as relays, solenoids, and indicators.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | MC-TDON12 |
| Full Model / Part Number | MC-TDON12 51304446-150 |
| Brand | Honeywell |
| Product Type | Digital Output Field Termination Assemblies |
| Output Type | Digital output field termination |
| Output Channels | 32 channels |
| Channel Isolation | Non-isolated |
| Nominal Output Voltage | 24 VDC |
| Maximum Current per Channel | 100 mA |
| Response Time | Less than 1 ms |
| Terminal Interface | Compression terminals |
| Redundancy Support | Supports redundant configurations |
| Mounting Type | Honeywell rack and chassis-compatible mounting |
| Environmental Protection | Conformal coated assembly |
| Origin | USA |
| Weight | Approx. 0.6 kg |
| Dimensions | Approx. 30 cm x 20 cm x 20 cm |
Process Control Signal Interface Characteristics
The MC-TDON12 operates within Honeywell process control architectures by transferring digital output commands from the associated output processing hardware to external field wiring. Unlike analog process loops that use the 4-20 mA HART protocol, this assembly terminates discrete 24 VDC output circuits and distributes switching signals through its field terminals.
The 32-channel arrangement increases I/O density at the termination level. In addition, the compression terminal interface provides mechanical retention for field conductors in installations subject to vibration and routine cabinet temperature changes. Because the channels are specified as non-isolated, installation practices should consider the electrical relationship between channels and associated common circuit references.
The conformal coating protects the assembly surface from humidity and industrial atmospheric contaminants. Therefore, cabinet environmental conditions, field cable routing, and grounding practices should still remain consistent with the applicable Honeywell system installation requirements.
Frequently Asked Questions
Q: Does the MC-TDON12 provide channel-to-channel isolation?
A: No. The provided specification identifies the MC-TDON12 as a 32-channel non-isolated digital output field termination assembly. Field circuit design should therefore account for shared electrical references and the associated system wiring requirements.
Q: What type of field loads can the MC-TDON12 interface with?
A: The assembly is specified for low-power 24 VDC industrial loads, including relays, solenoids, and indicators, with a maximum specified current of 100 mA per channel.
Q: Does the MC-TDON12 support redundant system configurations?
A: Yes. The provided technical data specifies redundancy support. However, the physical arrangement and any output transfer behavior depend on the associated Honeywell processor architecture and system configuration.
Field Installation Guidelines
- Verify the model identification MC-TDON12 51304446-150 before installation and confirm compatibility with the associated Honeywell DCS hardware.
- Install the assembly only in the specified Honeywell rack or chassis location.
- De-energize the relevant field circuits before connecting or disconnecting field wiring unless the applicable system documentation explicitly permits energized maintenance.
- Route 24 VDC output wiring separately from high-voltage power conductors to reduce electrical interference and simplify maintenance.
- Tighten compression terminal connections according to the applicable Honeywell installation documentation.
- Maintain consistent conductor identification for all 32 output channels during cabinet wiring.
- Follow the system grounding arrangement for field cable shields and common circuit references.
- Do not exceed the specified 100 mA maximum load current per output channel.
- Inspect the assembly and terminal wiring for contamination, damaged conductors, or loose connections during scheduled maintenance.
- Do not assume hot-swap capability unless the associated Honeywell system documentation specifically identifies the installed configuration as supporting energized replacement.
Reviews
There are no reviews yet.