Door contact monitoring
- Other applications
- Monitoring doors/door contacts at remote buildings (dock sheds) to detect unauthorised opening
- Standard door contacts were connected to the measuring circuit of the monitoring relay in series.
When the door is opened, the contact is opened, the resistance of the measuring circuits becomes infinite, and the output relay of the E3TF01 triggers a siren with a lamp.
- - Low-cost technical solution to protect remote buildings against unauthorised entry
- Long sensor cables and galvanic isolation of the measurement circuit and supply circuit
This might be of interest for you
No entries found.
Operating range monitoring
Multiple fans driven by multiple motors are connected to a frequency converter. The internal monitoring systems in the frequency converter cannot recognise the…
Re-cooling system monitoring
The overloading of the re-cooling systems in a data centre is prevented.
Safe grid separation for photovoltaic systems
Grid and system protection from TELE safely separates photovoltaic systems from the grid in the event of a fault. The unit is programmable, making it suitable…
When the lights fail in public buildings (such as schools) because of undervoltage, the emergency lighting systems must be activated in publicly accessible…
Emergency power monitoring
Phase failure for the operating theatre ventilation systems in hospitals is to be recognized as quickly as possible and the system is to be switched over to an…
Power source switchover
When the voltage falls below 0.85 times the nominal voltage for longer than 0.5 seconds, the system must switch over from the normal power supply to the…