ABB ACS2000 DFE User Manual page 58

58 ACS2000 DFE UM 3BHS360367 ZAB E01 REV. K
Location
—
References
The fieldbus adapter is DIN rail-mounted inside the
—
control compartment (3-8).
3-8 Location of fieldbus
and pulse encoder
interface
The indicated mounting position may vary depend-
ing on the number of optional devices on the swing
frame.
Terminals X1
1
2
3
4
5
6
7
8
Communication with AMC circuit board
The NTAC module communicates with the AMC cir-
cuit board of the INU via a fast optical link using
the standard DDCS protocol. The optical fibers are
connected to channel 1 of the AMC circuit board.
—
3-8
A+ Channel A
A-
B+ Channel B
B-
Z+ Channel Z
Z-
SH Shield
SH
INU
AMC circuit board
DDCS
NTAC
Pulse encoder interface
Fieldbus adapter
3.3.6 Pulse encoder interface NTAC (option)
Overview
In the following cases, a speed encoder is needed:
• If an immediate fly-start is required and there is
no time to scan the speed.
• If the application requires a speed accuracy of
0.5% of the nominal speed or better.
• If operation below 10% nominal speed is contin-
uous, which means more than a few seconds.
• If it is a master/follower application with
mechanically coupled machines.
In any other case, including constant torque appli-
cations, an encoder is not required..
Terminals X2
1 -V 0 V
2 -V 24 V
3 +V
4 24 / 25
5 15
6 24
7 0 V
8 +24 V
Location
The NTAC interface is DIN rail-mounted inside the
control compartment (3-8).
The indicated mounting position may vary depend-
ing on the number of optional devices on the swing
frame.
3.3.7 Motor temperature supervision
Motor temperature supervision is accomplished
via optional PT100 input modules. These modules
are suitable for connection of PT100 resistance
thermometers in accordance with IEC60751 in 2, 3
or 4 conductor systems.