Yaskawa Sigma-5 User Manual: Design and Maintenance - Rotary Motors - Analog Voltage and Pulse Train Reference - Manual (Page 85)

3 Wiring and Connection
3.4.1 Reference Input Circuit
3-34
• Precaution when host controller uses open collectors with customer-supplied power.
Before wiring, confirm that the specifications of 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 Ω
12 V or less 820 Ω to 1.5 kΩ
5 V or less 180 to 470 Ω
Circuit example of open-controller output
SERVOPACK
VF = 1.5 to 1.8 V
Vcc
Tr1
VF
R1
i
Host controller
150 Ω
4.7 k Ω
Pull-up