1548 ELECTRICAL INTERFACE
Electrical interface between the Micropolis 1548 drive (with 8-bit, Single-Ended Interface) and the host system is accomplished via connectors as shown in the figure below.
Signal Connector J1 is a standard 50-pin SCSI interface connector. The signals on J1 include the 8-bit SCSI bus and various control and handshaking lines.
Multi-Function Connector / Jumper Block J2 is used for device addressing.
Power Connector J3 is a 4-pin connector used to supply +5V and +12V to the drive.
Connectors J4 and J5 are 3/16-inch spade lugs located on the HDA and frame, respectively, and are used for grounding purposes. System characteristics determine proper ground connection.