Associated Products:

PM74, PM74

KB1070: Adjusting Trip current settings on PM74

This article was last updated on Oct. 11, 2022, 3:17 p.m. | Print Article | Leave Feedback

PM74 Current Trip settings:

The PM74 has the nominal trip current for all 4 channels configured by OPSW7 and OPSW8, in the following order;

  1. If OPSW7 is changed to Closed, then Trip current is 3Amps, and OPSW8 is ignored

  2. If OPSW8 is changed to Closed , then Trip current is 6Amps.

  3. If OPSW7 and 8 are both Thrown (factory reset default) the Trip current is default 4Amps.

Note that the DCC channel current is typically time-varying, so the trip current is usually a peak above the average track currents detected.

The continuous/combined current on any of the track plug/connectors must be below the 12amp connector RMS rating, and this is safely below most DCC Booster ratings.

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