Digital Outputs; Output Alarm Type No-Si - X3-05, Pin 2; Fan Motor Contactor Type Si - X3-05, Pin 1; Fan Continuous Purging X3-05, Pin 3 - Siemens LMV37.4 Series Basic Documentation

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7.4 Digital outputs

Safety-related outputs, type SI
Using a contact feedback network (CFN), 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 (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).
7.4.1 Output alarm type No-SI – X3–05, pin 2
Alarm
Figure 18: 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.
7.4.2 Fan motor contactor type SI – X3–05, pin 1
Fan motor contactor
Figure 19: 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
Continuous fan operation
Figure 20: 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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20.09.2013