Ai1 Or Ai2 As A Pt100 Or Kty84 Sensor Input - ABB ACS880-37 Hardware Manual

and must not be connected to other equipment or the temperature sensor must be isolated
from the I/O terminals.

AI1 or AI2 as a Pt100 or KTY84 sensor input


Three Pt100 sensors or one KTY84 sensor for motor temperature measurement can be
connected between an analog input and output as shown below. (Alternatively, you can
connect the KTY to FEN-11 analog /I/O extension module or FEN-xx encoder interface
module.) Do not connect both ends of the cable shields directly to ground. If a capacitor
cannot be used at one end, leave that end of the shield unconnected.
1...3 × Pt100 or 1 × KTY84
T T
T
1) Set the input type to voltage with the appropriate switch or jumper on the control unit. Make the
corresponding setting in the control program in parameter group 12 Standard AI.
2) Select the excitation mode in parameter group 13 Standard AO.
WARNING! As the inputs pictured above are not insulated according to
IEC 60664, the connection of the motor temperature sensor requires double or
reinforced insulation between motor live parts and the sensor. If the assembly
does not fulfill the requirement, the I/O board terminals must be protected against contact
and must not be connected to other equipment or the temperature sensor must be isolated
from the I/O terminals.
DIIL input

On both the supply and inverter units, the DIIL input is used for the connection of safety
circuits. The input is parametrized to stop the unit when the input signal is lost.
Drive-to-drive link

The drive-to-drive link is a daisy-chained RS-485 transmission line that allows basic
master/follower communication with one master drive and multiple followers.
Set termination activation switch D2D TERM to the ON position on the drives at the ends
of the drive-to-drive link. On intermediate drives, set the switch to the OFF position.
Use shielded twisted-pair cable (~100 ohm, for example, PROFIBUS-compatible cable) for
the wiring. For best immunity, high quality cable is recommended. Keep the cable as short
as possible; the maximum length of the link is 50 meters (164 ft). Avoid unnecessary loops
and running the cable near power cables (such as motor cables). Ground the cable shields
as described in section
3.3 nF
> 630 V AC
Connecting the control cables
Control units of the drive 129
XAI
1)
AIn+
AIn-
XAO
2)
AOn
AGND
on page 93.