5
vacon • 78 Installation
Local contacts: http://drives.danfoss.com/danfoss-drives/local-contacts/
Figure 49. Maximum loads on +24V/EXT+24V output
Digital input signal inversions
The active signal level is different when the common inputs CMA and CMB (terminals 11 and 17) are
connected to +24 V or to ground (0 V). See Fig. 25. The 24 V control voltage and the ground for the
digital inputs and the common inputs (CMA, CMB) can be internal or external.
Figure 50. The Positive/Negative logic
# Reference # Reference
A Max. 150 mA C Max. 250 mA
B+24V out
# Reference # Reference
A
Positive logic (+24 V is the
active signal) = the input is
active when the switch is
closed.
B
Negative logic (0 V is the active sig-
nal) = the input is active when the
switch is closed. You must set the
jumper X3 to the position 'CMA/CMB
isolated from ground'.
A B
DIN1
+24 V
GND
DIN2
DIN3
CMA
+24 V
GND
DIN1
DIN2
DIN3
CMA
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