IM483H/IM805H Rev. R032206
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IM483H/IM805H Rev. R032206
S e c t i o n 7
I n t e r f a c i n g t o t h e I M 4 8 3 H / I M 8 0 5 H
S e c t i o n O v e r v i e w
The IM483H/IM805H was designed to be incorporated directly in the user’s
printed circuit board. In order to operate, the IM483H/IM805H must have the
following connections:
n
Motor Power (+V).
n
+5VDC Input.
n
MSEL Inputs.
n
Current Adjust (Reduction is optional).
n
Logic Interface.
n
Minimum Connections.
L a y o u t a n d I n t e r f a c e G u i d e l i n e s
Logic level signals should not run parallel to motor phase signals. The motor
phase signals will couple noise onto the logic level signals. This will cause
rough motor motion and unreliable system operation. Motor phase signals
should be run as pairs and should be separated from other signals by ground
traces where possible.
When leaving the board, motor cables should not run parallel with other wires.
Phases should be wired using twisted pairs. If motor cabling in excess of one
foot is required, motor cabling should be shielded twisted pairs to reduce the
transmission of EMI. The shield must be tied to AC ground at driver end only
(or the supply ground if AC ground is not available). The motor end must be
left floating.
If more than one driver is connected to the power supply, separate power and
ground connections from each driver to the power supply should be used.
The power supply cables need to be a twisted pair if power is connected from
a source external to the board. If multiple drivers are used with an external
power source, and it is not possible to run separate power and ground connec-
tions to each driver, a low impedance electrolytic capacitor equivalent to two
times the total capacitance of all driver capacitors and of equal voltage must be
placed at the power input of the board.
