12
2.2.1.
Master Select Connector
A standard female DB9 connector is located on the rear panel for master frame
grabber selection. Use of this connector is optional. The CLV-411 will default to
frame grabber 1 as master when no connection is made. Table 2-1 identifies the DB9
signal assignments.
Table 2-1: Master Select DB9 Connector
Signal Name
DB9 Pin#
Notes
SEL0 +
1
Master Select 0
n/c 2
no connection
n/c 3
no connection
SEL1 +
4
Master Select 1
n/c 5
no connection
SEL0 -
6
Master Select 0 Return
n/c 7
no connection
n/c 8
no connection
SEL1 -
9
Master Select 1 Return
Two control inputs (SEL0+/- & SEL1+/-) are used to select the master frame grabber.
The control inputs are received by opto-isolator devices for system electrical isolation.
SEL0 is logic “1” when 5-10 VDC is applied between SEL0+ and SEL0-. SEL0 is
logic “0” when 0 VDC is applied. Similarly, SEL1 is logic “1” when 5-10 VDC is
applied between SEL1+ and SEL1-. SEL1 is logic “0” when 0 VDC is applied.
