7.1.2 Activating the function
Universal Xx inputs are always available. If not required for their functionality, they
can be used for diagnostics purposes.
Availability
To activate, assign a LABEL (identifier) to each input used. The identifier also
defines the input's physical unit. The following identifiers are available:
Assigning the
identifiers
LABEL (identifier) Explanation
ROOM Room temperature
OUTS Outside temperature
SAT Supply air temperature
Temp Temperature sensor without dedicated functionality in °C /
°F
% DC 0…10 V signal, unit %
0.0 Universal input with 1 decimal place,
resolution –99.9…+999.9, increment 0.1
0000 Universal input without decimal place, resolution –
999…+9999, increment 1.
REMx Absolute setpoint adjuster
REL Rem setp adjuster relative, in K / °F, range −3…+3 K
FRST Frost protection
DIG Digital
There are 2 special features with regard to the assignment of the physical unit:
Notes on units
• The unit of room temperature, supply air temperature and outside temperature is
always °C (°F)
• Digital inputs do not require units
There is a more detailed description for each specific use of the universal inputs in
the following sections:
Further details
• Universal inputs used as analog inputs, see 0
• Universal inputs used as digital inputs, see 7.3
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Siemens Universal Controllers RLU2… CE1P3101en
Building Technologies Inputs 29.08.2008
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