Pinout configuration for Seitz 8720A receiver DB9 connector and 8725A servo amplifier 4-pin Lemo connectors

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2004Follow Focus forum

22 years old. Gear and prices may have changed since.

The 4-pin Lemo connectors on the servo amplifier use pin 1 for +12V power supply (red wire), which connects to DB9 pin 7 on the receiver
Channel 1 Lemo pin 2 connects to DB9 pin 5, and pin 3 connects to DB9 pin 3 for ground
Channel 2 Lemo pin 2 connects to DB9 pin 8, and pin 3 connects to DB9 pin 3 for ground
Channel 3 Lemo pin 2 connects to DB9 pin 9, and pin 3 connects to DB9 pin 3 for ground
Pin 4 on all Lemo connectors is not connected
Motor control on the DB9 connector uses pins 3, 4, 5, 7, 8, and 9
Double gauge wiring should be used for the +12V power connection when making cables of significant length to handle current draw

Information is based on Model 2 era diagrams, may not apply to all Seitz follow focus generations
The pinout was not confirmed against official Seitz documentation by the respondent
Original manual consulted did not contain this information