Reading 0 1633 4910 8183
Input (mA) 0 4 12 20
Table 38: Ext. cap. Vi
Reading 7 5910
Input (Amp AC) 0 1.0
Table 39: Current
Table 34 in subsection 4.1.1. shows the numbering of analog inputs.
Analog outputs
This picture shows which analog output value (in percentage) Unisab III is transmitting to the
connected equipment. The signals are 4-20 mA signals and can e.g. be used to regulate the
speed of a frequency converter or to open a motor valve. When using analog regulation of the
frequency converter, the capacity and Vi slides can be regulated digitally at the same time.
As long as the above menu picture is shown in the display, test mode = Yes and a test value
between 0 and 100% can be selected. Unisab III will then transmit an mA signal correspond-
ing to the test value.
Note: Do not let the compressor motor run when using test mode as the motor revolutions
will follow the changes in the signal. However, test mode can be used to check whether the
frequency converter receives the signal correctly by reading the analog input signal in the
menu system of the converter.
Digital inputs
This picture shows the actual state of the digital inputs both at compressor standstill and dur-
ing operation.
0 = Input open
1 = Input closed
Service
Engineering manual - Unisab III 1.10
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