YASKAWA SGD7S series Product Manual page 135
Sigma-7-series ac servo drive.
sigma-7s servopack with
analog voltage/pulse train references
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Also See for SGD7S series:
- Product manual (621 pages) ,
- Selection manual (337 pages) ,
- Product manual (473 pages)
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4.5 I/O Signal Connections
4.5.4 I/O Circuits
Important
4-44
• Precaution When Host Controller Uses Open-Collector Output with User-Supplied Power Sup-
ply
The SERVOPACK may fail depending on the relationship between the pull-up voltage (Vcc) and
the pull-up resistance (R1). Before you wire the circuits, confirm that the specifications of the
host controller satisfy the values shown in the following table.
Pull-Up Voltage (Vcc)
24 V
12 V max.
5 V max.
Circuit Example for Open-Collector Outputs
Ho t controller
Vcc
R1
i
Pull-up
Tr1
Pull-Up Resistance (R1)
1.8 kΩ to 2.7 kΩ
820 Ω to 1.5 kΩ
180 Ω to 470 Ω
ERVOPACK
Ω
Ω
150
4.7 k
V F
VF = 1.5 V to 1.8 V
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Troubleshooting
