Hardware Reference Manual
421 Intelligent Serial, 8-Port
each serial interface has a line driver that is configured and controlled directly from the local processor, enabling
each line to be set to the application requirement via software control.
1.1.7 External Connection
The PMC421 offers both front and rear I/O. The front I/O is a high-density 68-pin connector. The 68-pin
connector mates with a separate cable to provide standard connection to 8 DB-9 male connectors (purchased
separately). For applications that require rear I/O, the ports are wired to the J4 connector of the PMC421.
DDC No. Rx-URMH 002 Rev -
Issued 12 November 2002
6 of 19
