Chapter 3 – Electrical Installation
3-10 ACS/ACC/ACP 601 Frequency Converters
Control Panel in
Remote Use
Connect the Control Panel cable to terminal X19 of the NAMC-11, or
with NAMC-03 board to terminal X28 of the NIOC board (X300 of the
NIOCP board).
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The pulse encoder shall be insulated electrically from stator or rotor to
prevent forming of current path through the pulse encoder. The usual
coupling-type encoder must have an electrically insulating coupling.
When a hollow-shaft type pulse encoder is used, the insulation can be
implemented by insulating the ball joints of the engaging arm, or
insulating the bar of the engaging arm. Shield of the encoder cable
should be insulated from the encoder frame. See
Appendix B
for
earthing of the other end of the encoder cable shield.
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When the encoder is connected correctly, running the drive in the
Forward
(positive) direction should produce positive encoder feedback.
On incremental encoders, the two output channels, usually marked
1 and 2 or A and B, are 90° (electrical) apart from each other. When
rotated clockwise, most encoders – but not all – have channel 1
leading channel 2. Determine the leading channel by referring to the
encoder documentation, or by measuring with an oscilloscope.
The encoder output channel that leads when the drive runs
Forward
should be connected to NIOCP input A, the output channel that trails to
NIOCP input B.
The zero reference output channel is connected to NIOCP input Z.
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This section gives general installation instructions for Drive
Window
PC
tool and ACx 600 optional modules, such as fieldbus adapters, I/O
extension modules and the pulse encoder interface. Connection
examples are given at the end of the section.
NIOCP board
X300
X19
NAMC-11 with NDCO
X19
NAMC-11
ACx 601/604 with NAMC-11 board
ACx 601/604 with NAMC-3 board and ACx 607
NIOC
X28
Earth the cable
screen at the near
earthing screw.
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