YASKAWA pg-b3

7 Troubleshooting
YASKAWA ELECTRIC TOBP C730600 75B YASKAWA AC Drive Option PG-B3 Installation Manual 41
u Preventing Electrical Interference
Take the following steps to prevent erroneous operation caused by noise interference:
1. Use shielded wire for the PG encoder signal lines.
2. Use PG encoder signal cables that are shorter than 100 m (328.1 ft.).
3. Separate option control wiring from main circuit input power wiring and motor output power
cables using conduit or cable tray dividers.
4. Ground the shield of the cable on the PG encoder side and the drive side.
5. Verify that the shield is properly grounded and ground one end of the signal line or remove
the ground connection on both ends if electrical interference problems arise in the PG
encoder signal.
n
Interface Circuit
Complementary Output
Figure 22
Figure 23 Complementary Outputs for the Interface Circuit
Open-Collector Outputs
Figure 23
Figure 24 Open-Collector Outputs for the Interface Circuit
PG-B3
PG Encoder
470 Ω
330 Ω
330 Ω
A-,B-,Z-
A+,B+,Z+
IG
AO,BO,ZO
0V
A,B,Z
Vcc
IP
IG
0V
12 V
Monitor Signals
B3
PGB3
470 Ω
330 Ω
330 Ω
A+,B+,Z+
IG
AO,BO,ZO
IP
IG
12 V
PG Encoder
A,B,Z
Vcc
0V
A,B,Z
Monitor Signals
B3
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