Siemens LMV52 series User Manual

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Building Technologies Division User Manual LMV5... CC1A7550.5en
COx supervision and control 07.07.2015
4 COx supervision and control
4.1 General

Note!
The COx sensor is not included in the Siemens AG scope of delivery.
OEM customer is responsible for checking that the sensor is suitable for the
functions described below.
4.2 Compatibility of the COx functions
The new COx functions are available from the following software versions:
- PLL52 from software version V01.40
(as this requires a supply air sensor temperature range of >400 °C).
- LMV52.4 from software version V10.10
4.3 Functioning principle of COx supervision
For the purpose of supervising the COx quantities during combustion, the LMV52.4
offers the option of connecting a COx measurement transducer to the PLL52.
The states of the COx measurement transducer switching output have the following
meanings:
 Contact open: COx present
 Contact closed: No COx present
These are evaluated by the LMV52.4 when COx supervision is active.
When COx supervision is active, line breaks, faults in the PLL52, and faults in the bus
communication between the LMV52.4 and PLL52 result in a safety shutdown. This is
also the case during O2 trim control.
Warning!
The connections of the COx sensor to the LMV52.4, and the COx functions in
the LMV52.4, are not established in a fail-safe manner.

Siemens LMV52 series Specifications

General

Brand	Siemens
Model	LMV52 series
Category	Control Unit
Language	English