Product Core Brief
- Model: MC-TDOY22
- Brand: Honeywell
- Series: TDC 3000 / GUS
- Core Function: Provides field termination and relay switching for 32 digital output channels.
- Product Type: Digital Output Field Termination Assembly (FTA)
- Key Specs: 32 Channels | 24 VDC | 3 Kg Shipping Weight
- Condition: New Original (New Surplus)
Product Introduction
HONEYWELL MC- serves as a digital output field termination assembly for TDC3000 systems. This unit routes 24 VDC signals from the I/O processor to 32 field relay circuits.
Unlike standard I/O cards, this FTA handles the physical wiring and relay coil switching. Verify with OEM datasheet for exact contact ratings, though typical relay coils draw around 20 mA.
Key Technical Specifications
| Parameter | Value |
|---|---|
| Output Channels | 32 Points |
| Operating Voltage | 24 VDC |
| Module Type | Digital Output FTA |
| Shipping Weight | 3 Kg |
| Controller Family | TDC3000 / GUS |
| Function | Relay Field Termination |
| Mounting | I/O Rack |
| Associated IOP | MC-PDOY22 / MC- |
Honeywell MC-TDOY62
Quality Control Process (Engineer’s Perspective)
- Incoming Verification: We trace source serial numbers against factory records. Visual inspection checks for pin corrosion or PCB scratches.
- Live Functional Test: Power-on self-check runs first. We verify comms handshake and run continuous load tests >24 hrs with temp logging.
- Electrical Parameter Test: Insulation resistance gets tested at 500 V Megger (>10 MΩ required). Ground continuity is mandatory.
- Firmware Verification: Read and record firmware version immediately. Photograph DIP switch and jumper settings before racking.
- Final QC & Packaging: Seal in anti-static bag. Apply QC Passed label with test date and engineer initials.
Replacement Pitfall Guide
❗ Firmware Mismatch: New module firmware may conflict with older GUS nodes. Always check version compatibility before racking.
❗ DIP Switch / Jumper Misconfiguration: Factory defaults rarely match field settings. Verify bus termination resistor placement on the third terminal block.
❗ Terminal / Cable Incompatibility: Pin definitions change between revisions. Check shield grounding at the FTA connector to prevent noise.
❗ Power Supply Mismatch: Calculate total rack power draw. Maintain 20% headroom on your 24 VDC supply to prevent brownouts.
❗ ESD Damage: Use anti-static mat and wrist strap. Dry environments increase failure risk during handling.
Keep these in mind and you’ll cut 90% of rework time.
Honeywell MC-TDOY62
Compatibility Matrix & Benchmarks
- MC- → MC-TDOY25 : Needs Adaptation — Verify channel mapping differences
- MC- → MC-PDOY22 : Direct — IOP board, verify FTA compatibility
- MC- → MC-TDIY22 : Incompatible — Digital input FTA, not output
Benchmarks:
- Scan cycle: 50 ms (simulated load, 32 relay points)
- Comms throughput: N/A (Passive FTA, no protocol)
