38 ATEX-certified motor thermal protection function with Pt100 relays (+L514+Q971)
Wiring example
In this example, contacts of the Pt100 relay(s) are wired to digital input DI6 of the drive
control unit.
1. Connect the Pt100 sensor(s) of the motor to the relay(s) K71.x, K72.x and K73.x
(whichever are present) through terminal block [X506].
2. Connect a +24 V DC source via contacts 14 and 13 of the extension relays (A81, A82,
A83, if present) to digital input DI6 on the drive control unit. The contacts are wired in
series.
3. With an FSO module (not shown in the figure)
: If necessary, connect a reset circuit to
an input of the FSO module (for example, DI X113:2).
See the circuit diagrams delivered with the drive for the actual wiring and terminals. For a
wiring diagram example, see page 76.
Drive control unit
(ZCU/BCU)
X506 XD24:7
XDI:6
X504 (optional)
XD24:7
XDI:6
+24VD
DI6
13
14
A81, stator
windings
13
14
(A82,
bearings)
13
14
(A83, stator
windings)
00 ACS880 ATEX cabinet.book Page 38 Tuesday, May 28, 2019 10:25 AM
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