Studio Technologies M233-01151 - Manual (Page 43)

Model 233 User Guide Issue 5, November 2014
Studio Technologies, Inc. Page 43
Four operating modes are available: relay
disabled, relay follows main output status,
relay follows talkback 1 status, and relay
follows talkback 2 status. These choices
were previously discussed in this user
guide and should be reviewed.
The relay provides two “form-C” contacts,
each consisting of a common, normally
open (not shorted), and normally closed
(shorted) connection. Obviously the two
form-C contacts change state in unison;
two independent relay functions are not
provided. These relay contacts are ac-
cessible on the Model 233’s main printed
circuit board assembly by way of two
3-position header connectors labeled
P16 and P17. The contacts are titled A
and B, but there is no significance be-
tween the two. With both headers pin 1
is normally closed, pin 2 is common, and
pin 3 is normally open. For additional
details on connecting to the 3-position
headers please refer to the Additional
Connectors section in the Technical Notes
area of this user guide.