Switches S201, S202 And S801 - Danfoss VLT AQUA Drive FC 202 Operating Instructions Manual

How to Install
Very long control cables and analog signals may in rare
cases and depending on installation result in 50/60 Hz
ground loops due to noise from mains supply cables.
If this occurs, it may be necessary to break the screen or
insert a 100 nF capacitor between screen and chassis.
Connect the digital and analog inputs and outputs
separately to the frequency converter common inputs
(terminal 20, 55, 39) to avoid ground currents from both
groups to affect other groups. For example, switching on
the digital input may disturb the analog input signal.
Input polarity of control terminals
PNP (Source)
Digital input wiring
12 13 18 19 27
Illustration 4.26 PNP (Source)
NPN (Sink)
Digital input wiring
12 13 18 19 27
Illustration 4.27 NPN (Sink)
MG20Y202
Operating Instructions
29 32 33 20 37
29 32 33 20 37
Danfoss A/S © Rev. 06/2014 All rights reserved.
NOTICE
Control cables must be screened/armoured.
Illustration 4.28 Grounding of Screened/Armoured Control
Cables
Connect the wires as described in the product related
Operating Instructions. Remember to connect the shields in
a proper way to ensure optimum electrical immunity.

4.3.2 Switches S201, S202 and S801

Use switches S201 (A53) and S202 (A54) to configure the
analog input terminals 53 and 54 as a current (0–20 mA)
or a voltage (-10 V to +10 V).
Enable termination on the RS-485 port (terminals 68 and
69) via the switch S801 (BUS TER.).
See Illustration 4.24.
Default setting:
S201 (A53) = OFF (voltage input)
S202 (A54) = OFF (voltage input)
S801 (Bus termination) = OFF
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