3 Installation
3.6 Electrical Installation
DC1 Variable Frequency Drive
04/16 MN04020003Z-EN
www.eaton.com
89
Alternatively, in addition to the broad area gland plate, you can twist the
screen braid at the end and connect to the protective earth with a cable lug.
To prevent EMC disturbance, this twisted shielding connection should be
made as short as possible
Prevent the screen from becoming unbraided at the other end of the control
cable, e.g. by using a rubber grommet. The screen braid must not make any
connection with the protective ground here because this would cause
problems with an interference loop.
Control terminals
The DC1 variable frequency drive has four control inputs (control terminals 2,
3, 4, and 6). Two of these are parameterizable as digital control inputs;
while the others can be set to work as digital or analog control inputs.
The variable frequency drive comes with the following default setting:
•
Control signal terminal 2 as digital input 1 (DI1),
•
Control signal terminal 3 as digital input 2 (DI2),
•
Control signal terminal 4 as digital input 3 (DI3),
•
Control signal terminal 6 as analog input 1 (AI1).
Control signal terminal 8 can be used as a digital or as an analog output.
It is used as an analog output (AO) in the default configuration that comes
with the variable frequency drive when it is delivered.
Figure 54: Control signal terminals (D = digital / A = analog)
2
DI1
FWD
24 V
3
DI2
REV
4
DI3
(AI2)
FF1
6
AI1
(DI4)
f-Soll
1
+24 V Out
< 100 mA
8
AO
(DO)
f-Out
CPU
0...+10 V/20 mA
0...+10 V/20 mA
