Campbell Scientific SDM-SIO4 4-Channel Serial I/O Interface - Manual (Page 8)

Section 1. Introduction
1-2
write-protected memory, which allows you to set up the SDM-SIO4 in the
office and then move it to the site of installation in an unpowered state.
¿
¾ ½ ¾
¿ А
¿ А ¾
Switches -
Go to 1 if command
line active
½ ½
½
¾
¾
¿ ¿
¿
¿ ¿ ¿
¿
А
А
А
А
А
¿
¿
To Other Ports
To Other Ports
1
À
PORT
Handshake
Control
Tx Buffer Rx Buffer
Command Line
Control
Datalogger
Command
Control
CRC/SIG
Driver
Format
Driver
& User
Strings
CRC/SIG
Driver
Filter Driver
Converted
Data Buffer
1 0 0
K K K
Handshake Line
Command Line
Switch
Status
LED
Datalogger can
Execute Command
Line Commands
Rx
Tx
Data HS SDE
C1 C2 C3
to SDM port
of datalogger
Control Lines
Data Lines
FIGURE 1-1. Schematic Diagram of the SDM-SIO4