Campbell Scientific CR7 Measurement and Control System - Manual (Page 154)

SECTION 15. I/O CARD ADDRESSING AND MULTIPLE I/O MODULES
15-4
TABLE 15.1-3. Jumper Settings for Analog Input Cards.
15.2 USE OF MULTIPLE I/O MODULES
Up to four I/O Modules can be connected to one
control module. Additional I/O Modules may be
remotely located from the Control Module.
Two enclosures are available for the 720 I/O
Module; the standard ENC-7F Fiberglass
Environmental Enclosure or the ENC-7L
Aluminum Laboratory Enclosure. Options also
are available for 19" rack mounting (M197) or
mounting in a NEMA type enclosure (uses
M720 Back Mount Brackets).
The 720XL I/O Module mounts directly in a 19"
rack or may be mounted in a NEMA type
enclosure with the Model M720 Back Mount
Brackets.
TABLE 15.2-1. SC94 Pin Description.
Pin ID Control Module I/O Module
A Transmit data Receive data
B Transmit data return Receive data return
C Receive data return Transmit data return
D Receive data Transmit data
NOTE: Interconnect cable lengths in
excess of a 1000 ft. limit the maximum
baud rate at which data may be transmitted
between the Control Module and the
Remote I/O Module. Cable length and
recommended baud rates are listed in
Table 15.2-3.