Honeywell 10302/2/1 Watchdog Repeater (WDR) Module
The Honeywell 10302/2/1 serves as the primary 10302/2/1 Watchdog Repeater (WDR) Module utilized to execute power-supply supervision and watchdog signal distribution across Honeywell FSC platforms.
Suffix Breakdown & Model Matrix
The unit is cataloged under base type 10302/2/1 with production variation code 12600. Physical slot keying utilizes module coding holes A5 and A9 matching rack coding large pins A5 and A9 to prevent improper insertion in safety chassis slots.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 10302/2/1 |
| Brand | Honeywell |
| Origin | Manufacturer Standard Facility |
| Weight | 0.12 kg (Net), 1.5 kg (Shipping Weight) |
| Dimensions | 4 TE, 3 HE (4 HP, 3U) |
| Operating Temp | Standard industrial cabinet ratings (0 deg C to 60 deg C typical) |
| Power Consumption | 5 VDC at 35 mA, 24 VDC at 25 mA |
| Primary Function | Power-supply supervision and watchdog signal distribution |
| WDG1 and WDG2 Input Current | 0.1 mA |
| Maximum Watchdog Output Current | 900 mA |
| Connector Type | DIN 41612, Type F |
| Software Compatibility | Version 3.00 or later |
| Safety Class / Approvals | CE, TÜV, UL |
Channel Isolation and Power Supervision Architecture
The module continuously monitors 5 VDC and 24 VDC power supply rails for input/output modules while distributing synchronized watchdog signals across system nodes. Galvanic isolation barriers safeguard internal bus circuits against abnormal voltage surges or power supply faults exceeding normal thresholds. Furthermore, channel-to-channel isolation architecture maintains strict separation between redundant and non-redundant power loops, preventing common-mode propagation during single-point electrical disturbances.
Frequently Asked Questions
Q: What are the specific conditions requiring the installation of a watchdog repeater?
A: It is required in multiple-PSU configurations for each subsequent 24 VDC to 5 VDC power supply unit, when supply voltages exceed 31.0 VDC, when total watchdog current exceeds 900 mA, or when combining redundant and non-redundant I/O sections.
Q: What is the backplane current draw for the 10302/2/1 module?
A: The module consumes 35 mA from the 5 VDC rail (excluding external watchdog output current) and 25 mA from the 24 VDC rail.
Q: How is physical mismatch prevented during module replacement?
A: Mechanical coding uses holes A5 and A9 on the module matching large pins A5 and A9 on the system rack.
Field Installation Guidelines
- Ensure that all system backplane power rails are de-energized before inserting or extracting the module to protect DIN 41612 connector pins from arcing.
- Verify that mechanical coding pins (large pins A5 and A9) align correctly with the module coding holes prior to seating.
- Secure the module tightly within the 4 TE, 3 HE euro-rack slot using front panel screws to maintain proper chassis ground continuity.
- Verify power supply output voltage thresholds and maximum load limits before initiating system startup and watchdog signal routing.
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