Virginia Controls, LLC
MH-3000 User Manual, 1_03C10-VC
Page 11
Switch will prevent the car from traveling further away from the normal area of car travel, but
allows the car to run back towards the normal area of car travel.
2.2.6
Terminal Landing Final Limit Switches
The Terminal Landing Final Limit Switch, where required by code, is a normally closed
contact that opens when the car has gone a considerable distance beyond floor level at a
terminal landing. It will prevent any further movement of the car in either direction. Consult
the applicable codes for the proper setting of this switch.
2.2.7
Emergency Terminal Landing Limit Switch
The Emergency Terminal Landing Slowdown Switch should be installed as required by the
applicable codes. It is a normally closed contact that opens after the car has gone beyond
the Terminal Landing Normal Limit Switch.
2.2.8
Hoistway Access Zone Switches
The Hoistway Access Limit Switches limit the motion of the car on Hoistway Access, by
disabling the car if it moves away from the access floor. Install the zone switches to stop
the car from running down if the top of the car goes below floor level at the top access floor,
and to stop the car from running up if the car goes above the second floor while on
Hoistway Access at the bottom floor.
2.2.9
Door Open and Close Limit Switches
The Door Open Limit Switch is open when the doors are fully open, and closed at all other
times. It will de-energize the door open relays in the door operator when the doors have
opened fully.
The Door Close limit Switch is open when the doors are fully closed, and closed at all other
times. It will de-energize the door close relays in the door operator when the doors have
closed fully.
NOTE: Many problems in operation can be attributed to failures in the Door
Open or Close Limit Switches (including long door times, improper door
operation on Fire Service, inability to go on to or to clear Fire Service, etc.)
Always check the Door Open and Close Limit Switches if unusual operation of
the elevator is observed.
NOTE: It is recommended that the Door Close Limit Switch be adjusted so
that, as the doors are closing, the Car Door Contact closes before the Door
Close Limit opens. Consult the Door Operator Manufacturer's installation
instructions for further details on the adjustment of the doors.
NOTE: 2000 (or later) code compliant controllers will not run without the
Door Close Limit operation properly.
NOTE: If a solid state door operator unit is being used, check the appropriate
schematics to see if any changes are required on the actual operator. These
may include changing resistors in the operator, and adding a diode for proper
open and close torque.
