Connections from the SEII to a 3rd party pulse processor are typically made through the external Scanning Interface Unit's DB-25 rear-panel connector labelled PHA Logic I/O. However, in certain circumstances, a direct connection to the DB-37 connector on the back of a SEII board is allowed. Shown below are the connections.

SEII DB37 SIU DB25 342 (ADC Busy) 4/22 --->> 2/15 --->> no connection (Pulse Reject) 5/23 <<--- 3/16 <<--- ADC Inhibit Out (Live Time) 3/21 <<--- 4/17 <<--- AMP/PUR Busy Out (Fast Channel) 2/20 <<--- 6/19 <<--- Fast Disc Out (PHA Input) 6/24 <<--- BNC <<--- Amp Out

Each signal line has its own ground reference (the pins are listed as signal/ground). The required connections for this pulse processor are shown to the right.