Siemens RMB795B Basic Documentation page 138

Basic configuration
Configuration Function
•
Basic type
•
RMZ785
(1)
R MZ 787
•
(2)
R MZ 787
Input identifiers
Inputs Configuration
N.X1...N.X6
N.X1
RMZ785.X1...RMZ785.X8
RMZ787.X1... RMZ787.X4
x Y
Outside temperature
N.X1
TA
x Y
Open loop
control functions
Operating mode Configuration
• 2-pipe system H/C (
• H/C changeover input (
H / C changeover
23
x x x x x x x x • Timer function ( )
• Rm optg mode inp 1 (
SA EA
Enable
• Rm optg mode inp 2 (
Setpoint prio
Room group 1
Relay
• Fire alarm off( )
1 2
• Smoke extraction (
Q Q
• Holiday input ( )
• Special day input ( )
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Siemens
Building Technologies
Basic type B: RMB plant
(time programs with preselected setpoints and emergency control per room group)
Use of additional inputs and outputs with the extension modules RMZ785 and RMZ787.
The functions of the central control unit can be configured to these inputs / outputs
Input specifying which modules are connected to the central control unit in which order (position)
)
)
)
)
/ )
Central control unit RMB795B
Appendix
Function
Input of input identifier:
• Physical units:
°C, %, g / kg, kJ / kg, W / m², m / s, bar, mbar, Pa, ppm, universal 000.0
(display with one decimal place), universal 0000 (display with no decimal
place).
The unit is only required for presentation on the display. The controller
presents all settings that depend on the unit (e.g. P-bands) in the unit.
Sensors for °C:
Ni 1000, 2 x Ni1000 (averaging), T1, Pt 1000, DC 0...10 V, all other units
DC 0...10 V, range adjustable
• Digital (input for potential-free contacts)
• Special identifiers: Outside temperature
With the special input identifier, internal connections are taken directly from
the central control unit.
• SIGNAL Y: For sensors with passive signals at an input terminal that
cannot be passed on to another device via bus, as described in subsection
7.2.6, "Multiple use of sensors".
Outside temperature, sensor as described under "7.2 Analog inputs", for the
following functions:
• Summer/winter compensation
• Release night cooling.
Function
Collection of heat and refrigeration demand operating modes.
• Activation of 2-pipe system heating / cooling
• Digital input for heating / cooling changeover (H/C changeover input).
Room operating modes.
• Timer function: Digital input for room operating mode Comfort for a
settable period of time.
• Preselection of settable room operating mode with room operating
mode input 1.
• Room optg mode selector with room operating mode input 1+2.
• Fire alarm off and smoke extraction (selectable with supply air, extract
air, or supply air and extract air).
Calendar functions
• Holiday and special day input: Digital input for
holidays (settable room operating mode) or
special day (special day program of time switch).
CE1P3122en
18.01.2012