MC-TDOY22 Honeywell 51204162-175 Digital Output Modules
Manufacturer: HONEYWELL
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Part Number: MVC-TDOY22
Condition：New with Original Package
Product Type: Digital Output Modules
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Country of Origin: Sweden
Payment:T/T, Western Union
Shipping port: Xiamen
Warranty: 12 months
Honeywell MC-TDOY22 Digital Output Termination Assembly
The Honeywell MC-TDOY22, also cataloged as the MC-TDOY22 Digital Output Field Termination Assembly, operates as a dedicated hardware component for digital output termination and distribution within Experion PKS, TDC 3000, and TPS control systems. Configured for high-density loop management, the unit routes 24 VDC discrete control signals directly from upstream I/O processors to external solid-state field switches and actuators.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | MC-TDOY22 (Part Number: 51204162-175) |
| Brand | Honeywell |
| Origin | Factory standard |
| Weight | 1.0 kg |
| Dimensions | 308 x 121 x 55 mm |
| Operating Temp | -40 to +70 deg C |
| Power Consumption | Determined by active 24 VDC external loop distribution loads |
| Function | Digital output termination and distribution |
| Signal Voltage | 24 VDC |
| Channels Supported | 32 digital output channels |
| Output Type | Solid-state digital switching |
| Max Output Current | Up to 1 A per channel |
| Isolation | Channel-to-channel and channel-to-system isolation |
| Mounting | DIN-rail or cabinet installation |
| Protection Features | Short-circuit, overcurrent, and surge suppression |
Process Control & Channel-to-Channel Isolation
The field termination assembly integrates distinct channel-to-channel isolation networks alongside channel-to-system isolation barriers to halt ground loop currents. This physical separation prevents localized field wiring short-circuits from disrupting neighboring 4-20 mA HART loop protocol circuits or causing voltage sags on the host system backplane. Each of the 32 channels features independent microsecond-level solid-state digital switching response paths and dedicated overcurrent clamping components.
Frequently Asked Questions
Q: What are the current carrying limitations per channel under continuous operations?
A: Each digital output channel handles a maximum solid-state switching current of up to 1 A, subject to ambient thermal constraints defined by the system cabinet environment.
Q: Can an engineer replace or swap the active I/O modules connected to this termination board during live operation?
A: While the field termination board itself is a passive distribution layout, you must isolate the corresponding 24 VDC power lines and output channels before servicing or replacing upstream active electronic boards to prevent inductive voltage transients.
Q: What specific on-board hardware protection components mitigate field-side inductive voltage spikes?
A: The board includes integrated surge suppression networks and short-circuit protection circuits dedicated to each channel to clamp electrical noise and high-voltage transients.
Field Installation Guidelines
- Isolate all external 24 VDC loop power sources before mounting the module to prevent electrical short-circuits.
- Ground the assembly base plate directly to the master instrument grounding rail using a low-impedance copper strap.
- Secure the card assembly firmly to the standard DIN-rail or cabinet mounting grid using the integrated physical lock tabs.
- Route the 32 discrete digital output field lines in separate, shielded cable ducts away from high-power variable frequency drive (VFD) power loops.