Skip to main content
Electronic Theatre Controls Inc

Unison LinkPower (ULP) reading +42Vdc -0Vdc instead of +21Vdc -21Vdc


In Unison systems with portable station connectors, if the EMI Filter/Varistor 220pF 25v (L1) is damaged on the portable connector; the ULP supply will no longer output +21Vdc and -21Vdc (like it should).

It will now output approx. +42Vdc and -0Vdc. This will cause all attached stations to not bind or become unbound. If the portable connector is removed, the system will operate normally.

In this case, the portable connector should be replaced.

  • Was this article helpful?