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2. Drive implementation
Wiring the VW3 A3 401 option card encoder input when replacing an ATV38
On the Altivar 38, encoder signals A A- or B B- had to be reversed in order to avoid the motor rotating in the wrong direction. This anomaly
has been corrected on the Altivar 61 and, therefore, the wiring conforms to the signal order A A- B B-.
ATV38
ATV 61
The encoder card’s connector does not have a terminal for connecting the cable shielding.
This shielding must, therefore, be connected to the power terminals; use a tag connector or an accessory: D23 FA3.
0 V
5 V
A
A-
B
B-
A
A-
B
B-
0 V
5 V
0 V
5 V
A
A-
B
B-
A
A-
B
B-
0 V
5 V
Encoder Encoder
OR
A
A-
B
B-
A
A-
B
B-
0 Vs
+ Vs
0 Vs
+ Vs
VW3 A3 40p
Encoder
PO PA/+ PB PC/-
U/T1 V/T2 W/T3
R/L1 S/L2 T/L3