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Building Technologies Basic documentation LMV37.4... CC1P7546en
HVAC Products 6 Basic unit 01.12.2009
6.4 Digital outputs
Safety-related outputs, type SI
Using a contact feedback network (CFN), these contacts are read back by the micro-
computers and checked for their correct positions.
Non-safety-related outputs, type No-SI
These outputs are not monitored by the CFN and, for this reason, can only be used for
non-safety-related actuators, or actuators made safe in some other form (e.g. alarm).
6.4.1 Output alarm, type No-SI X3–05, terminal 2
LMV...
Bild 282/0309
X3-05
Alarm
Figure 16: Output alarm X3-05
Output for connection of an alarm lamp or horn.
The output is activated when the unit is in the lockout position (phase 00).
This output can also be used to indicate start prevention.
6.4.2 Fan motor contactor, type SI X3–05, terminal 1
LMV...
Bild 283e /1109
X3-05
Fan motor contactor
Figure 17: Fan motor contactor X3-05
Output for control of a fan power contactor (200 VA). In accordance with the sequence
diagrams, the fan is on in phase 22 (refer to Sequence diagrams).
6.4.3 Fan continuous purging X3–05, terminal 3
LMV...
Bild 284e /04 09
X3-05
Fan continuous purging
Figure 18: Fan continuous purging X3-05
If continuous purging is required, the fan motor contactor must be connected to fan con-
tinuous purging X3-05, terminal 3. This terminal is tapped behind the unit fuse and the
safety loop (refer to subsection Continuous fan).
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