ACS 300 User’s Manual 27
Chapter 4 - Control Connections
Standard 2
Switch S1 is in the same position as in Standard selection.
Parameter PARAM SET has value 2.
Table 4-3 Standard 2 digital input functions.
Table 4-4 Standard 2 Constant speed selection
3-wire
3-wire is for general industrial applications which usually
require a three wire start/stop signal for safety reasons. With
3-wire control, momentary start and stop push-buttons are
used. The start button is normally open, and the stop button
is normally closed. When operating from external momen-
tary push-buttons, the ACS 300 requires a start command to
be given after power is applied.
The stop input is active even when operating from the key-
pad, allowing the normally closed contact from a motor over-
load relay or other external interlock to stop the frequency
Digital input Function Notes
DI1 Start / Stop Connect +24 V DC to start
DI2 Reverse Connect +24 V DC to reverse
DI3 CS Constant speed (=CS) selection,
refer to table 4-4
DI4 CS
DI5 Parameter set
selection
0 V =set 1 and +24 V =set 2
DI3 DI4 DI5 Result
0 0 0 Speed reference from AI1
1 0 0 CS1 (parameter Page 2)
0 1 0 CS2 (parameter Page 2)
1 1 0 CS3 (parameter Page 2)
0 0 1 Speed reference from AI1
1 0 1 CS1 (parameter Page 4)
0 1 1 CS2 (parameter Page 4)
1 1 1 CS3 (parameter Page 4)
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