All our power supplies are shipped pinned for internal line frequency clock. If Sequence of Events (SOE) functionality is required on a NIM, the clock master, the clock slave, and the NIMs with SOE requirements must be pinned foir use with external clocks. All other nodes are pinned for internal (line frequency) clock. The jumper is located at position J102 and is clearly labled (INT) and (EXT).

WPC refurbishes LCN power supplies replacing electrolytic capacitors and verify output voltage specs.