4-10
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Chapter 4
Signal Connections
Wiring Concerns
Caution
Keep trigger input, shutdown input, and breakpoint output signals and
their ground connections wired separately from the motor driver/amplifier signal and
encoder signal connections. Wiring these signals near each other can cause faulty
operation.
Caution
Excessive input voltages can cause erroneous operation and/or
component failure.
Trigger Input, Shutdown Input, and Breakpoint Output Circuits
Figures 4-6, 4-7, and 4-8 show a simplified schematic diagram of the circuits used by the trigger
inputs, shutdown inputs, and breakpoint outputs for signal buffering.
Figure 4-6.
Trigger Input Circuit
Figure 4-7.
Shutdown Input Circuit
Figure 4-8.
Breakpoint Output Circuit
74FCT244
1 k
Ω
1/
8
W
From the extern
a
l
connector trigger pin
s
To the trigger
circ
u
it
s
DGND
Vcc
3
.
3
k
Ω
74FCT244
From the extern
a
l
connector
s
h
u
tdown pin
To the
s
h
u
tdown
circ
u
it
s
DGND
Vcc
To the extern
a
l connector
b
re
a
kpoint pin
s
From the
b
re
a
kpoint circ
u
it
s
Vcc
3
.
3
k
Ω
74A
S
760
