ABB ACS380 User Manual

When using a 24 V encoder, it is possible to supply power to the encoder and BTAC
module from the 24 V DC auxiliary power output of the drive. If you supply power from
the auxiliary power output, make sure that you do not exceed the maximum load capacity.
Use the following table to determine if you can use the auxiliary power output. Add the
missing values and calculate the sum. The sum must be less than (or equal to) the
maximum output current of the auxiliary power output. For the maximum output current,
see the drive technical data.
mALoads with the drive 24 V DC auxiliary voltage output
× 15 mA eachNumber of digital inputs used
50 mABTAC-02
Encoder current requirement
Requirements for other user connection(s) to drive 24 V DC auxiliary voltage output
Total
￭ Wiring – Encoder
1. Remove the connector cover.
2. Determine the encoder wiring configuration:
•
Refer to Phasing (page 209) to determine if the encoder has a normal pulse order
– encoder channel A pulse leads channel B pulse.
•
Refer to Encoder output types (page 210) to determine the encoder output type.
• For push-pull types, refer to the manufacturer’s recommendation for the
connection. You can use single-ended or differential output.
3.
Refer to Wiring diagrams – Push-pull type encoder output (page 211), Wiring diagrams
– Open collector (sinking) encoder output (page 213) or Wiring diagrams – Open
emitter (sourcing) encoder output (page 214) to select the applicable diagram, and
wire the encoder.
Obey these guidelines:
• Normally, ground the cable shield only at the drive end.
• Do not route the encoder cables in parallel to power cables (for example, motor
cables).
4.
Make sure that the encoder phasing is correct. Refer to Phasing (page 209).
Phasing
When the encoder is connected correctly, running the drive in the Forward (positive
speed reference) direction should produce a positive encoder speed feedback.
Option A: Oscilloscope test. On incremental encoders, the two output channels,
typically A and B or 1 and 2, are 90° (in phase) apart from each other. When rotated
BTAC-02 pulse encoder interface module 209

ABB ACS380 Specifications

General

Brand	ABB
Model	ACS380
Category	DC Drives
Language	English