Operating Mode 1 (Extlc) - Siemens LMV51 Series Basic Documentation

Operating mode 1
(extLC)
Siemens Building Technologies
HVAC Products
External load controller.
In this operating mode, an external load controller (e.g. Siemens RWF40) is used. The
internal control algorithm is not active.
The internal temperature limiter function can be activated.
The external load controller must have 3 contact outputs which - as shown below - must
be connected to the LMV51... basic unit.
External
load controller
ON / OFF
Terminal
or
stage 1
ON / OFF
CLOSED Terminal
or
stage 3
OPEN
Terminal
or
stage 2
Special case: BMS as control via a contact
External
load controller
BMS
ON / OFF
or
stage 1
CLOSED Terminal
or
stage 3
OPEN
Terminal
or
stage 2
Basic Documentation LMV51...
5 Temperature or pressure controller (internal load controller LC)
Basic unit LMV51...
X5-03
Evaluation
contact checkback
network
3
2
7550b07E/0202
Basic unit LMV51...
X5-03
Terminal
Evaluation
contact checkback
network
3
2
7550b08E/0800
Demand for heat BC (BU)
CLOSED or stage 3 FARC (BU)
OPEN or stage 2 FARC (BU)
Demand for heat BC (BU)
CLOSED or stage 3 FARC (BU)
OPEN or stage 2 FARC (BU)
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CC1P7550en
29.05.2002