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Building Technologies Basic documentation LMV37.4... CC1P7546en
7 Basic unit LMV37.4 17.12.2018
7.4 Digital outputs
Safety-related outputs, type SI
Using a contact feedback network, these contacts are read back by the microcomputers
and checked for their correct positions.
Non-safety-related outputs, type No-SI
These outputs are not monitored by the contact feedback network and, for this reason,
can only be used for non-safety-related actuators, or actuators made safe in some other
form (e.g. alarm).
7.4.1 Output alarm type No-SI – X3–05, pin 2
LMV...
Bild 282/0309
X3-05
Alarm
Figure 23: Output alarm X3-05
Output for connection of an alarm lamp or horn.
The output is activated when the LMV37.4 is in the lockout position (phase 00).
This output can also be used to indicate start prevention.
7.4.2 Fan motor contactor type SI – X3–05, pin 1
LMV...
Bild 283e/1109
X3-05
Fan motor contactor
Figure 24: 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 chapter Sequence diagrams).
7.4.3 Fan continuous purging X3–05, pin 3
LMV...
Bild 284e/1010
X3-05
Continuous fan operation
Figure 25: Continuous fan operation X3-05
If continuous purging is required, the fan motor contactor must be connected to
Continuous fan operation – X3-05, pin 3. This terminal is tapped behind the unit fuse
and the safety loop (refer to chapter Continuous fan).
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