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

How to Install
Long control cables and analog signals, in rare cases, and
depending on installation, result in 50/60 Hz earth loops
due to noise from mains supply cables.
In such cases, break the screen or insert a 100 nF capacitor
between screen and chassis if needed.
The digital and analog inputs and outputs must be
connected separately to the frequency converter common
inputs (terminal 20, 55, 39) to avoid earth currents from
both groups to affect other groups. For example, switching
5 5 on the digital input disturbs the analog input signal.
Input polarity of control terminals
12 13 18
Illustration 5.57 Input Polarity of Control Terminals
12 13 18
Illustration 5.58 Input Polarity of Control Terminals
112
VLT
PNP (Source)
Digital input wiring
19 27 29 32 33
NPN (Sink)
Digital input wiring
19 27 29 32 33
MG20Z102 - VLT
®
AQUA Drive FC 202 Design Guide
NOTE
Control cables must be screened/armoured.
Connect the wires as described in the Operating
Instruction for the frequency converter. Remember to
connect the shields in a proper way to ensure optimum
electrical immunity.

5.3.16 Switches S201, S202 and S801

Switches S201 (A53) and S202 (A54) are used to select a
current (0–20 mA) or a voltage (0–10 V) configuration of
the analog input terminals 53 and 54 respectively.
Switch S801 (BUS TER.) can be used to enable termination
on the RS-485 port (terminals 68 and 69).
See Illustration 5.52 and Illustration 5.53.
20 37
Default setting:
S201 (A53) = OFF (voltage input)
S202 (A54) = OFF (voltage input)
S801 (Bus termination) = OFF
NOTE
Change switch position at power off only.
20 37
Illustration 5.59 Switch Locations
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is a registered Danfoss trademark