![background image](http://html.mh-extra.com/html/danfoss/vlt-midi-drive-fc-280/vlt-midi-drive-fc-280_programming-manual_506511010.webp)
In rare cases, long control cables and analog signals could
result in 50/60 Hz ground loops due to noise from mains
supply cables. If this occurs, break the screen or insert a
100 nF capacitor between screen and chassis.
The digital and analog inputs and outputs must be
connected separately to the common inputs (terminal 55)
of the frequency converter to avoid ground currents from
both groups to affect other groups. For example, switching
on the digital input could disturb the analog input signal.
Input polarity of control terminals
130BE730.10
12
13
18
19
27
29
32
33
55
+24
VDC
0
VDC
PNP (Source)
Digital input wiring
Illustration 1.3 PNP (Source)
NPN (Sink)
Digital input wiring
12
13
18
19
27
29
32
33
55
+24
VDC
0
VDC
130BE731.10
Illustration 1.4 NPN (Sink)
NOTICE
Control cables must be shielded/armoured.
See the section
Using Shielded Control Cables
in the
design
guide
for the correct termination of control cables.
130BA681.10
Illustration 1.5 Grounding of Shielded/Armoured Control
Cables
1.3.2 Start/Stop
Terminal 18 =
parameter 5-10 Terminal 18 Digital Input
[8]
Start
.
Terminal 27 =
parameter 5-12 Terminal 27 Digital Input
[0]
No operation
(Default
coast inverse
).
130BE732.10
12 13 18
32
27
19
29
33
P 5-12 [2]
P 5-10 [8]
Start/Stop
+24V
Speed
Start/Stop
[18]
Illustration 1.6 Start/Stop
Introduction
VLT
®
Midi Drive FC 280
8
Danfoss A/S © 12/2015 All rights reserved.
MG07C102
1
1
Содержание VLT Midi Drive FC 280
Страница 1: ...Programming Guide VLT Midi Drive FC 280 vlt drives danfoss com ...
Страница 2: ......
Страница 143: ...Index Programming Guide MG07C102 Danfoss A S 12 2015 All rights reserved 141 ...