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Building Technologies Basic Documentation LMV5... CC1P7550en
22 Revision history 22.05.2018
22.2.2 Changes to the load controller
22.2.2.1 Load controller, Software from V01.40 to V01.50
The software of the load controller has been changed from V01.40 to V01.50.
The following changes have been made:
∂ Auxiliary sensor for cold start thermal shock protection
∂ Straightforward changeover of operation to internal load controller
Using a potential-free contact at terminals X62 pin 1 and X62 pin 2, it is possible to
switch from external load controllers to the internal load controller of the LMV51.100.
The following operating modes can be switched over:
Operating mode 4 ↑ 2 = Int LC X62 ↑ intLC
Operating mode 5 ↑ 2 = Ext LC X62 ↑ intLC
Operating mode 3 ↑ 2 = Int LC Bus ↑ intLC
Operating mode 6 ↑ 2 = Ext LC Bus ↑ intLC
Operating mode 1 ↑ 2 = ExtLC X5-03 ↑ intLC
With software version V01.50 or higher, Pt100 sensors in operating mode 6 are
permitted
New load controller function for analog input for predefined load and load output
Manipulated variable input, modulating:
<3 mA Line interruption
4 mA or 2 V Low-fire (min. load)
20 mA or 10 V Nominal load (max. load)
Burner shutdown at <5 mA not used.
Load output, modulating:
<3 mA Line interruption
4 mA 0% load
xx mA Low-fire (min. load)
xx mA Nominal load (max. load)
20 mA 100% load
Shutting the burner down = no impact on signal.
Manipulated variable input, multistage burner:
Stage 1: 5 mA or 2.5 V
Stage 2: 10 mA or 5 V
Stage 3: 15 mA or 7.5 V
Switching thresholds at:
7.5 mA and 12 mA with 0.5 mA hysteresis
3.75 V and 6.25 V with 0.25 V hysteresis
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