Installation with door’s Monostable contacts
Headroom and reduced pit (Compliance with Article 2.2 of Annex 1 of Directive 95/16 / EC of the European
Community)
With the same consideration of previous chapter it is possible to manage installation with monostable contacts on the
landing doors to monitor the shaft access.
In a case where monostable door contacts are used, present in the controller is a bistable circuit. The reset procedure is
possible only if the bistable circuit is open, otherwise the controller gives a specific Fault RSP (§ 6): it is necessary to open
the Bistable circuit and after carry out the reset procedure.
The specific procedure is according type of Installation as described in following sections.
– From floor with three quick opening / closing of the reset key (optional).
– From the panel with three quick presses of button.
– From the PlayPad with specific reset (RSP reset).
If controller detects an automatic contact reset (contact close before reset procedure) it gives again a Fault RSP (Cod
121) as a fault on coil’s reset circuit.
Characteristics of the auxiliary contact (BERNSTEIN type) on all doors:
· Bistable NC contact (does not open during normal door operation). connected to dedicated input.
· 230 Vac reset coil
Optional reset key switches are electrically connected to BDU’s DOOR Contact input.
Parameter: See Annex X
Access in the Pit
Access to the pit is detected by operating the pit stop switch or by switching the pit control panel on to ‘Inspection’.
(both conditions open the safety chain on point SE1). This condition sets the Fault RSP (code 20) by preventing the
movement of the elevator car in normal operation.
After the end of the Inspection manoeuvre the personnel must:
• Remove the protections (in case of manual protections in the PIT), Return the selector switch and any STOP
buttons to ‘Normal’ and exit the lift shaft.
• Close the landing doors (check the safety chain) and carry out the reset using one of the following methods:
– From lowest floor with three quick opening / closing of the release key.
– From the panel with three quick presses of button.
– From the PlayPad with specific reset (RSP reset).
Characteristics of the auxiliary contact on the door (s) of the lowest floor:
Reduced Head Configuration
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