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Siemens Universal Controllers RLU2… CE1P3101en
Building Technologies Appendix 29.08.2008
Control functions (cont’d)
MODE (operating
mode)
Configuration Functions
D1
D2
MODE
ALM OFF
CH OVER
x
Q
Basic types A and U:
• Input for preselected operating
mode (OPMODE)
• H/C changeover (CH OVER)
• Fan release relay output (ALM
OFF)
Room operating modes.
• Operating mode input (OPMODE) for changeover between Comfort
and Economy setpoints
• Changeover input (CH OVER) for 2-pipe heating / cooling system
• Fan release relay output / No alarm output (ALM OFF) Output for
switching off the fan in case of frost and external fault status message
FROST (frost
protection)
Configuration Functions
FROST
• 2-stage frost protection on the air side
(active input signal DC 0…10 V = 0…15 °C)
• 2-stage frost protection on the water side
(passive input signal LG-Ni1000)
• Frost protection unit (digital input signal)
Aggregates
PUMP x (pump) Configuration Functions
p1 p2
Q
PUMP 1
PUMP 1
• Output (PUMP x) • Can be used as an auxiliary pump (e.g. air heating coil pump) or main
pump (e.g. in connection with chilled water precontroller)
• ON via sequence controller's load signal (from up to 2 sequences
with maximum selection, adjustable switching points), outside
temperature-dependent ON (adjustable)
•
Adjustable switch-off delay
•
Pump kick
AO x (modulating
outputs)
Configuration Functions
1
y1 y2
IN X
Y
x
A0
AO 1
• Modulating output … (AO) For modulating DC 0..10 V signals, e.g. for fan control.
• Load signal from sequence controller (from up to 2 sequences with
maximum selection)
• "Positioning signal min“ and "Positioning signal max" adjustable
• Settable inversion
• Valve opens according to the outside temperature
HREC (HR / mixed air
damper)
Configuration Functions
Y
y1 y2 x x
HREC
....................
x
IN X
Cooler
HREC
MECH 1
MECH 2
x
• Output (HREC)
MAT
• MECH input 1 (MECH 1)
• MECH input 2 (MECH 2)
• Air cooling valve (COOLER)
• External signal (IN X)
• Mixed air temperature (MAT)
For controlling HR equipment or mixing damper.
• Configuration with load signal “Heating” or “Cooling” from the
sequence controller (from max. 2 sequences with maximum
selection)
• Maximum economy changeover, optionally with 1 input (digital or
analog) or 2 inputs (differential measurement)
• HR supports cooling when cooling valve opens (also in case of
dehumidification)
• Adjustable "Positioning signal min“ and "Positioning signal max"
• Settable inversion
• External load signal can be applied
• Mixed air temperature control
• Startup function according to the outside temperature
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