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WB-MDM3 hardware revisions

revision 107800

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The batch number (Batch No.) is shown on a label on the side of the enclosure or on the printed circuit board.

Revision Batches Production period Changes from the previous revision
v2.11 v2.11A, v2.11A/1, v2.11B – ... 04.2026 - ...
  • Thermal fuse added
v2.10 v2.10F/1, v2.10F/2, v2.10F/3, v2.10F/4, v2.10D, v2.10G, v2.10G/1, v2.10G/2, v2.10H, v2.10H/1, v2.10H/2 06.2025 - 03.2026
  • AT24C02M5/TR EEPROM removed
v2.10 v2.10A, v2.10A/1, v2.10A/2, v2.10B, v2.10C, v2.10C/1, v2.10C/2, v2.10C/3, v2.10C/4, v2.10D, v2.10D/1, v2.10E, v2.10E/1, v2.10E/2, v2.10F 04.2024 - 06.2025
  • Output terminal block replaced with a five-position block
  • Higher-power shunts installed
  • Output MOSFETs changed from NCE65T180D to WMM26N65C4
  • Other minor internal changes
v2.8 v2.8M 12.2023 - 03.2024
  • Comparators replaced with equivalent COS2252SR instead of TS3702IDT
v2.8 v2.8L, v2.8L/1 11.2023

Internal reliability improvements:

  • Thermistor moved for faster overtemperature response
  • Minor adjustment to overcurrent trip threshold
  • Fuse: 5 × 20 mm ceramic type with higher breaking capacity replaces SMT 2410
  • Power circuit transistor changed from BSS127 to 1N60G
v2.8 v2.8K/2 09.2023
  • Output terminal block changed to a version without side walls
v2.8 v2.8A, v2.8B, v2.8C, v2.8C/1, v2.8C/3, v2.8D, v2.8D/2, v2.8E/1, v2.8E/2, v2.8E/3, v2.8F/1, v2.8F/2, v2.8G, v2.8G/1, v2.8H, v2.8H/1, v2.8I, v2.8J, v2.8J/1, v2.8K, v2.8K/1 09.2022 - 08.2023
  • Minor internal changes
  • RC networks replace resistors at channel outputs
v2.7 v2.7C - v2.7D, v2.7D/2 05.2022 - 09.2022
  • 1 MΩ resistors at channel outputs to suppress residual glow of some lamps
v2.7 v2.7B 06.2022 Custom version for a customer:
  • RS-485 only, no inputs
  • 1 MΩ resistors at channel outputs to suppress residual glow of some lamps
v2.7 v2.7A/1 04.2022 - ....
  • New microcontroller board version
v2.6 v2.6D, v2.6D/1, v2.6E, v2.6F 10.2021 - 03.2022
  • Input capacitors removed for faster input response
v2.6 v2.6D 08.2021 - 10.2021
  • GD32 microcontroller
No new features; final firmware 2.6.6
v2.6 v2.6B 05.2021
  • STM32F042K6T6 microcontroller
v2.6 v2.6A/J, v2.6A/K 04.2021
v2.4, v2.5, v2.6 v2.4D - v2.4F, v2.5A, v2.5B 06.2020 - 03.2021
  • Dry-contact input voltage approximately 12 V, 300 W version only
v2.4 v2.4C 02.2020 - 06.2020
  • Dry-contact input voltage changed to approximately 12 V; 300 W / 400 W versions
v2.4 v2.4A-B 11.2019 - 02.2020
  • Initial versions: dry-contact input voltage approximately 4.5 V; 200 W / 400 W versions