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3.4 Examples of Connection to Host Controller
3-31
• Precaution when host controller uses open collectors with customer-supplied power.
Before wiring, confirm that the specifications o
f the host controller satisfy the values
shown in the following table.
If these conditions are not satisfied, the SERVOPACK may malfunction.
Pull-up voltage (Vcc) Pull-up resistance (R1)
24 V 1.8 to 2.7 k
12 V or less 820 to 1.5 k
5 V or less 180 to 470
Circuit example of open-controller output
SERVOPACK
V
F = 1.5 to 1.8 V
Vcc
Tr1
V
F
R1
i
Host controller
150 Ω
4.7 kΩ
Pull-up
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