ABB ACS880-01 Series, Hardware Manual

Page: 102 / 224

102 Electrical installation
External power supply for the control unit (XPOW)
Ex24 V (2 A) power supply for the control unit can be connected to terminal
block XPOW. Using an external supply is recommended if
• the control board needs to be kept operational during input power breaks, for
example, due to continuous fieldbus communication
• immediate restart is needed after power breaks (that is, no control board power
up delay is allowed).
AI1 and AI2 as Pt100 and KTY84 sensor inputs (XAI, XAO)
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.
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.
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 .
1…3 × Pt100 or 1 × KTY
3.3 nF
> 630 V AC
XAI
XAO
AIn+
AIn-
AOn
AGND
1)
2)
T
T T
ACS880-01 HW.book Page 102 Monday, July 1, 2013 4:51 PM