The SSR-SDU integrated a full-size SD card for easier handling in the field. It features four serial channels with standard USB-C file access for data retrieval. The serial channels can be individually modified between RS-232 and TTL/CMOS configurations with solder jumpers.

The default configuration has Channels 1 and 2 as RS-232 and Channels 3 and 4 as TTL/CMOS. Channels 3 and 4 are 5V tolerant when configured for TTL/CMOS.

Standard version SRSDU supports up to 230.4k baud recording.
High Speed version SRSDUH supports up to 921.6k baud recording and includes an upgraded SDXC card.

Includes 9 inch mating connector, SD card, and 1220 coin cell lithium backup battery for the real-time clock.

Note that the backup battery may be excluded for international air shipments that disallow lithium batteries.

Part numbers:
SRSDU - SSR-SDU standard configuration
SRSDUH - SSR-SDU with High Speed option