The SDM-SIO4 has four configurable serial RS-232 ports that communicate with intelligent serial sensors, display boards, printers, satellite links, and other serial devices. Once programmed, the SDM-SIO4 communicates with devices connected in parallel with the datalogger's own program sequence, thus making the complete datalogging system faster and more efficient. A multi-tasking operating system allows concurrent transmission and receipt of data on all ports.

Features
Provides four configurable serial RS-232 ports
Allows connection to intelligent serial sensors, display boards, printers, satellite links, or applications where the data is transferred in a serial fashion 
Supports 0-5 V logic levels 
Supports baud rates from 25 to 115,000 bps
Specifications
Number of Ports: 4 (independently configurable for different serial data formats) 
Baud Rate: 25 to 115,200 bps 
Port Output: 0 to 5 V logic; ±5 V for RS-232 (switchable) 
Port Configuration: 9-pin D connectors 
Data Flow Control: by datalogger or SDM-SIO4, if required, using hardware or software protocols 
Power Supply: Unregulated 12 V supply, 9 to 18 Vdc 
Current Drain: 
All Ports Active: 40 mA 
Quiescent: 0.7 mA (quiescent state entered if there is no SDM or port activity for ~30 ms) 
Internal Battery: Retains configuration information only (lithium battery has an estimated life of 10 years)
Producing Area:USA