The serial port connector is a male DB-25 wired to connect directly to a PC standard 25 pin serial connector. Appropriate wiring adaptors are available to allow connection to other RS-232 port standards. There is buffer space for six packets. These 16 character packets are formatted in Biased Binary as follows. Start with a zero.
Options are available for other counting rates.
There are two data masking registers which are used to determine how the data bits are used. One register sets up Input or Output and the other determines which input bits will cause events that generate packets. There is a free running counter who's value is transferred in each packet. This is useful for making velocity measurements and other requirements. A 300 ma 5 volt power supply is included with the SEC-232m.