ocr: ST 3144 Family Installation Guide, Rev D pg 9 0000 PCB Available External LED Connector 5VDC + 5Volts Return +12 Volts Return +12VDC 4-Pin DC Power o RSS Drive Activity LED Ground 40-Pin 10-Pin AT Interface Block Connector User Configuration 3-Pin DC Power I 5 A e FRONT a Keyway EBE E PCB 2 A6810 Drive is Master Ground +12VDC Siave 5VDC Present Active LED Key - Pin 20 removed Reserved 4 NOTI USE) (DOI U Reserved Pin 1 Keyway L (DON NOTI USE) Figure 1: AT jumpers and connectors