Interfacing The Fault Input; Figure 7.8: Im483H/Im805H Inputs; Figure 7.9: Reset Timing; Figure 7.10: Interfacing The Fault In/Reset Inputs - Intelligent Motion Systems Excellence in Motion IM805H Operating Instructions Manual

I n t e r f a c i n g t h e F a u l t a n d R e s e t I n p u t s
The IM483H/IM805H has a Fault
input located at P1:4. This can be
used to force a fault condition. When
pulled low the signal is latched and
the outputs will be disabled. The
fault condition can only be cleared
by resetting the drive or cycling the
power.
When interfacing this input, an open
collector output or blocking diode
is REQUIRED or damage may
occur to the internal fault detection
circuitry.
The IM483H/IM805H also has a
Reset Input. On power up, or if the
Reset Input is Closed, the internal
reset circuit will hold the input low
for 100 to 300 milliseconds. The
"holding" time does not begin until
the Reset Input is Opened. (See
RESET BUTTON
Circuit
Open
W A R N I N G! When interfacing the FAULT IN/RESET input, an open collector, tri-state
output or blocking diode is REQUIRED or damage may occur. (See Figure 7.10.)
When controlling multiple drives
with a single Reset you must install
blocking diodes at the input (Pin 14)
of each drive. Because of the slight
differences in Reset timing, this will
prevent the drives from latching the
Reset Input in the LOW state. (See
Figure 7.11.)
IM483H/IM805H Rev. R032206
46
Circuit
Circuit Open
Closes at T=0
0

Figure 7.9: Reset Timing

FAULT IN/RESET
INPUT

Figure 7.10: Interfacing the Fault In/Reset Inputs

1
FAULT IN
MSEL 0
MSEL 1
MSEL 2
MSEL 3
SCLK
DIR
ENABLE
RESET
P1

Figure 7.8: IM483H/IM805H Inputs

Internal Reset Hold Time
Starts When Circuit Opens
100 200
Milliseconds
1N914 OR EQUIVALENT
OR
INTERFACE
CIRCUIT
RESET
BUTTON

Figure 7.11: Multiple Drives - One Reset

Bottom View
+5V
4.99k Ω
4.99k Ω
4.99k Ω
4.99k Ω
4.99k Ω
2.21k Ω
2.21k Ω
1.27k Ω
+5 V
300
FAULT IN /RESET
INPUT
UNIT #1
14
1N914 OR
EQUIVALENT
UNIT #2
14
1N914 OR
EQUIVALENT
UNIT #3
14
1N914 OR
EQUIVALENT
P2
RESET
INPUT
RESET
INPUT
RESET
INPUT