ThyssenKrupp NBS - Page 33

O PERATING MANUAL NBS TECHNOLOGY
ThyssenKrupp Aufzugswerke GmbH
Monitoring of door zone, NBS switchbox, ROBA switch
Fig. 3.5.3
Remarks
1) Safety circuit of the elevator system. Part elevator car and landing doors.
2) SC2 module for the levelling function and / or relevelling with open door.
3) Magnetic switch that scans one magnetic strip or a zone vane (door zone) in each landing,
i.e. a processor-independent zone signal is formed.
4) The evaluation of the second contact of K27 for shutdown according to 9.11.9 of DIN EN81-1:2010 in the case of error "uncontrolled car movement with open door" may only take place in
such a way, even in the event of an error, for example in a software listing not tested by an independent testing authority, that connection 2 of A27,
"Door zone channel 1 of the control system", cannot be influenced.
A27
safety circuit with electronic components, mat. no.: 6519 000 7497.
EC - Type Test Certificate registration no. 01/208/5A/0411/1813, TÜV Rheinland Group
G77.2 mains adapter for 24V DC supply of the circuit. However, the 24V DC can also be supplied by an elevator control system.
G77.1 brake voltage 207 / 104 V . The make contacts of the NBS contactor K77.3 at the ROBA switch terminal 1
start to build up the brake voltage 207 V DC, which is reduced to the retentive voltage of 104 V DC after approx. 1 second.
Switch S77 opens the NBS emergency brake system for emergency rescue.
Contacts K77.1 and K77.2 (1-2) at the terminals G77.1:3-4 (ROBA switch) switch off the NBS emergency brake system on the DC side.
R77.2 resistor that regulates the time of over-excitation with 207 V DC. 1M Ohm corresponds to approx. 1.2 seconds of over-excitation time.
S27 Sensor door zone, magnetic switch
S77 Maintained contact switch with positive-guided contacts
K27 12V DC relay for translation of the door zone of S27.
K77.1, K77.2 Contactors with one coil for 230 V AC to switch the emergency brake (NBS) Y78.
K77.3 Contactor with one coil for 230 V AC or 48V DC to switch on the emergency brake Y78. Shutdown in the normal mode on the AC side.
Low-noise switching, but with longer engaging time of the brake.
The event block of K77.3 lets the NBS emergency brake system engage with a delay after engagement of the operational brake.
As one make contact of K77.3 is safety-relevant, this contactor is monitored in case it drops out.
K77.4 Relay 24 V DC. Translates the brake test switch S78 of the NBS emergency brake system into the control system.
K77.5 Relay contactor that monitors the brake test switch S78 of the NBS emergency brake system for drop-out, thus making this brake the safety brake.
Y78 Braking device (NBS emergency brake system) affecting the traction sheave shaft as part of the protection device against overspeed for the elevator car moving upwards.
For the case of uncontrolled car movement, the NBS emergency brake system works in both directions of travel.
This braking device has an EC - Type Test Certificate for each type of gear drive
W191 –
TW45 –
TW63 –
TW160 -
S78 Brake test switch of the NBS emergency brake system
S102.1
Safety switch on the speed governor that activates the NBS emergency brake system in the event of overspeed.
Corresponds to wiring diagram 7-4
Circuit for monitoring of door zone
NBS switchbox ROBA switch
33
10-2012