Eaton PowerXL DC1 Series - External Fault (EXT); Connecting a Thermistor

7 Applications
7.2 External fault (EXT)
DC1 variable frequency drive 12/13 MN04020003Z-EN www.eaton.com 123
7.2 External fault (EXT)
Digital input 3 (DI3) is intended for use as an external fault input.
In the following configurations, DI3 is being used as an input for an external
fault:
An overload relay, for example, can be connected to the external fault input.
When connecting it, make sure to use the N/C contact.
Figure 74: Connecting example: external fault (EXT)
7.3 Connecting a thermistor
A thermistor (PTC thermistor) installed in the motor can be connected to
digital output 3 (DI3). In order be able to do this, digital input 3 must be
reconfigured as an external fault input as described in section “External fault
(EXT)” above.
Figure 75: Thermistor connection
P-15 = 0  P-12 = 3, P-12 = 6, P-12 = 7
P-15 = 1, P-15 = 2  P-12 = 3, P-12 = 6, P-12 = 7
P-15 = 3, P-15 = 4, P-15 = 7, P-15 = 8  P-12 = 3, P-12 = 6, P-12 = 7
P-15 = 5, P-15 = 6  P-12 = 3, P-12 = 6, P-12 = 7
2
DI1
FWD
+24 V
3
DI2
REV
4
DI3
EXT
6
AI1
f-Soll
1
+24 V Out
< 100 mA
0...+10 V/
20 mA
P-12 = 0
P-15 = 7
￫
The switching threshold for the external fault input is fixed and
cannot be changed:
Fault when  2.5 k; reset fault when
 1.9 k
2
DI1
FWD
+24 V
3
DI2
REV
4
DI3
1
+24 V Out
< 100 mA
P-12 = 0
P-15 = 7
ϑ
ϑ
ϑ
M
3 ~