Secomea SiteManager 1439 - Low-Side Switching Equipment Example

SiteManager xx29/xx39 - Working with I/O ports Page 9 of 12
Version 2, April 2013
3.3. Low-side Input switching equipment example.
When an output port of the SiteManager is connected to equipment that has
“low-side switching” conductor connections on the input, you can use the
SiteManager output ports directly without any external components (such as
pull up resistors or relays).
( low-side switching)
0V
Input
24V
GND
Out1
Vout
+V
0V
+24VSM
Ref. the above, the ports of the SiteManager should also be powerful
enough to pull a relay directly (even a electromechanical one).