44
462
I
I
I
I
R
RED
RUN
RUN
HOLD
HOLD
500 X
X
-
=
R e d u c i n g t h e O u t p u t C u r r e n t
The INT-462 will automatically reduce the current in the motor windings .5
seconds after the falling edge of the last step clock pulse. There are two
possible ways that this may be done.
U s i n g a C u r r e n t R e d u c t i o n A d j u s t m e n t R e s i s t o r
( E N O F F M o d e )
The first way is to use a reduction adjustment resistor connected as shown in
figure 2.1.3. Using this method, the current in the motor windings will be
reduced to a holding current specified by the resistor value used. The value of
this resistor is calculated using the equation shown below.
If this method of reducing current in the motor windings is used, JP3 (see figure
2.1.3) will have the shunt positioned between pins 1 and 2 (factory default).
Table 2.1.5: Jumper JP3 Shunt Placement Options
1
1
2
2
3
3
JP3
ENOFF - Current Reduction
by Resistor.
ENON - Outputs Disable
Following a Move.
Position
Mode
1.5
0.5
R
RED
1.5
0.5
500 X
X
-
=
EXAMPLE:
This will determine the Current Reduction Adjust Resistor value for a
per phase Output Current (I
) of 1.5A and a Holding Current (I
) of 0.5A.
RUN
HOL D
= 375
Thus, the value of the Current Reduction Resistor will be 375 Ohms.
