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Contact type H2 module 1,
2, 3
430/617
Building Technologies Division
Consumer request VKx 10V
Application node External load x receives requests for heat in the form of voltage
signals (DC 0...10 V). A linear characteristic converts the applied voltage to a heat
request. This characteristic is defined via 2 fixed points (voltage value 1/function value
1, and voltage value 2/function value 2).
The function value's resolution is 0.1 °C. This means that the function value to be
parameterized for a setpoint of 80 °C, for example, is 800.
The request becomes active when – via the characteristic – the applied voltage leads to
a flow temperature setpoint of at least 6 °C. The request for heat remains active as long
as the applied voltage demands a flow temperature setpoint of at least 4 °C.
The flow temperature setpoint is limited to the boiler's maximum setpoint (Setpoint max
(2212)).
In addition, the flow temperature setpoint is limited to the Cutout temp LT (2531) –
minimum switch-off differential in heating mode (Switching diff off min HCs (2455)) –3
K.
Pressure measurement DC 10 V
The voltage signal at input Hx is converted to a pressure value (linear conversion). The
linear characteristic is defined by 2 fixed points (voltage value 1/function value 1, and
voltage value 2/function value 2).
Output request 10V
The heat source receives a voltage signal (DC 0...10 V) as a preselected output. A
linear characteristic converts the applied voltage to an output request. This
characteristic is defined via 2 fixed points (voltage value 1/function value 1, and voltage
value 2/ function value 2).
The function value's resolution is 0.1%. This means that the function value to be
parameterized for an output request of 50%, for example, is 500.
The request becomes active when the applied voltage is a minimum of 200 mV. It
remains active as long as the voltage at input H is a minimum of 150 mV.
The switch-off point for the burner lies 3 K below the Cutout temp LT (2531). The
burner's switch-on point lies by the switch-on differential in heating mode (Switching diff
on HCs (2454)) below the switch-off point. There is no valid Boiler setpoint (8311).
Note!
In the case of an externally preselected output, forced signals are sent to the
consumers. As a result, the setpoints of all heating circuits (pump and mixing circuits)
are set to their maximum.
Line no.
Operating line
6047
Contact type H2 module 1
6055
Contact type H2 module 2
6063
Contact type H2 module 3
NC
NO
The settings for input H2 on the extension module are the same as those for inputs H...
on the basic unit. They are described under operating line Function of input Hx.
NC
The contact is normally closed and must be opened to activate the selected function.
NO
The contact is normally open and must be closed to activate the selected function.
User Manual LMS14...
6 The settings in detail
CC1U7471en
28.01.2015
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