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Building Technologies
Boiler Sequence Controller RMK770
CE1P3132en
HVAC Products
3 Commissioning
01.03.2005
a
x
x x
x
d d
Q
Ou
ts
id
e
Di
sp
la
y 1
Di
sp
la
y 2
Di
sp
la
y
3
Di
sp
la
y 4
Ho
lid
ay
Sp
ec
ia
l d
ay
Miscellaneous
Time switch
Off
On
Q Q
x x
1
2
x
x
3
4
Re
la
y 1
Re
la
y 2
Faults
For more detailed information about these function blocks, refer to the following subsec-
tions.
3.3.6 Extension
modules
RMK770
RMZ78…
RMZ78…
RMZ78…
31
32
Z
08
A maximum of 3 extension modules per RMK770 can be used.
Prior to attaching an extension module, the plant must be disconnected from power.
The order in which the extension modules are fitted is
not
mandatory but must corre-
spond to the setting made on the controller.
When selecting the plant type, an extension module is automatically preconfigured, if
required. This can be changed in the basic configuration.
A maximum of 3 extension modules per controller can be used. The number of exten-
sion modules of the same type is not limited.
The assignment of functions to the basic module and the extension modules is not
prescribed.
With the plant types, the temperature sensors are always preconfigured to the basic
module as standard.
Relay outputs for 3-position applications are preconfigured to extension modules with
the possibility of using RC units (RMZ789).
The following types of extension modules can be connected to each RMK770:
•
Universal module RMZ785 with 8 inputs
•
Universal module RMZ787 with 4 inputs and 4 relay outputs (1 relay with changeover
contact)
•
Universal module RMZ788 with 4 inputs, 2 modulating outputs and 2 relay outputs (1
relay with changeover contact)
•
Universal module RMZ789 with 6 inputs, 2 modulating outputs and 4 relay outputs (2
relays each for the control of 3-position actuators with RC units can be activated)
The extensions can be activated by configuring them at a free position of the controller.
Position
1
Position
2
RMK770 RMZ788
RMZ787
The settings are to be made as follows:
Note
Order
Number of extension
modules per type
Assignment of
functions
Example