Ai1 And Ai2 As Pt100 And Kty84 Sensor Inputs (Xai, Xao) - ABB ACS880-07 Hardware Manual

AI1 and AI2 as Pt100 and KTY84 sensor inputs (XAI, XAO)

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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 × KTY
T T
1. Set the input type to voltage with switch J1 for analog input AI1or with J2 for analog input AI2. Set the
appropriate analog input unit to V (volt) 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.
T
3.3 nF
> 630 V AC
Control unit of frames R6 to R9 123
XAI
1)
AIn+
AIn-
XAO
2)
AOn
AGND