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Building Technologies Division Basic documentation LMV36... CC1P7544en
Infrastructure & Citiies Sector 10 Connection to load controllers 25.09.2013
10.5 External load controller via analog input X64
pin 1 / X64 pin 2
For the preselection of external outputs, an analog 4…20 mA input is provided.
Burner startup can take place only when contact X5-03 pin 1 is closed (load controller
(LR) On / Off).
A disruption of the current input or a current signal <3 mA leads to deactivation of the
analog input’s external preselected output. To avoid unnecessary positioning steps of
the actuators when the input signal varies, it is possible to set a minimum positioning
step for the predefined output. The minimum positioning step only becomes active in
modulating operation. For the external load controller via the analog input, a value of 1%
is preset.
No. Parameter
123.1 Minimum output positioning step: Output external load controller analog
204
Analog output invalid (4...20 mA)
0 = Default output low-fire
1 = Safety shutdown + prevention of startup
X64
GND
PWM fan
LMV...
Bild 364e/0409
5
4
3
2
1
Figure 73: External load controller via analog input X64 pin 1 / X64 pin 2
10.5.1 Thresholds for modulating operation
Actual value Current Display / output value
Low-fire 3...4 mA 20%
Low-fire 4 mA 20%
High-fire 20 mA 100%
Switching thresholds /
minimum positioning
step
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