DATA-LINC GROUP
6
PN 161-09981-002C
rev 8/04
DDAA1000/SRM User Guide
Point-to-Point Discrete Operation
The following illustrates an example of a point-to-point discrete system. The “Contact Closure Input” may be as simple as a
bare wire or be connected to an output of an I/O module. This is an example of turning a lamp at the Master unit by closing
a contact at the Remote unit using a discrete output.
Point-to-point discrete operations are bi-directional. An input on the Remote will activate same numbered output on the
Master. A contact closure on an input of the Master will close the output on the Remote on the same contact.
Figure 4: Point-to-Point Discrete Operation Example
Contact Closure Input
Contact Closure Outp
ut
8 7 6 5 4 3 2 1 G
8 7 6 5 4 3 2 1 G
Contact Closure Input
Contact Closure Outp
ut
8 7 6 5 4 3 2 1 G
8 7 6 5 4 3 2 1 G
Dry Contact Closure
DC Supply
+ -
Master
Remote
