Analog Inputs - Siemens SED2 series Operating Instructions Manual

Setting the DIP switches
on the I/O module
Siemens Building Technologies
HVAC Products
Example of the display while testing the input signals:
6.3.2

Analog inputs

The analog inputs are used to send positioning, control, and feedback signals to the
VSD and convert them to digital signals via A/D converters.
4.7k Ω Ω Ω Ω
Minimum
The analog inputs AIN1 and AIN2 are specified as follows:
Input level: 0 to 10 V or
0 to 20 mA
Resolution: 10 bit
Read cycle: 10 ms
Set the analog inputs to 0 to 10 V or 0 to 20 mA via the 2 DIP switches on the I/O
module.
Position DIP switch 1
ON
OFF
Factory setting for both DIP switches: OFF.
Refer to section 5.1.1.1, Setting the DIP switches on the I/O module.
SED2 variable speed drives
Programming
1
+10 V
2
0 V
3
AIN1+
A/D
4
AIN1-
10
AIN2+
A/D
11
AIN2-
DIP switch 2
mA mA
V V
DIN1 = 0
DIN2 = 1
DIN3 = 1
DIN4 = 0
DIN5 = 1
DIN6 = 1
AIN1 = 0
AIN2 = 1
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