
45
Open Collector Interface
Figure 7.7 shows an open collector interface connected to the reset input. This
interface method may be used with any of the logic inputs. Remember that a
current limiting resistor is required if an opto supply voltage greater than +5
VDC is used.
Figure 7.7: Open Collector Interface
TTL Interface
Figure 7.8 shows a TTL device connected to the enable input. This interface
method may be used with any of the logic inputs.
+5 VDC
CONTROLLER
OUTPUT
Opto Supply P1:4
Enable P1:5
Logic LOW will
disable the drive.
Figure 7.8: TTL Interface
+VDC
CONTROLLER
OUTPUT
R
… W 1%
LIMIT
Ω
+VDC
5
10
12
15
24
-----
681
1000
1300
2670
R
LIMIT
Opto Supply P1:4
Reset P1:6
Low Pulse
Will Reset
Driver
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