Instruction manual

Designing and Planning an M2150 System
16 Access Control Design Guide
Free/Secure Relay
Each relay board in the elevator node includes a free/secure relay, which is energized if any of the floors
controlled by that relay board is in Secure Access mode. The relay is deenergized when all floors are in
Free Access mode. This could be used by an external device to indicate the current access status. During
system planning, determine whether this feature is required.
What are Secure and Free Access Modes?
Under normal access-controlled conditions, the card holder must present his/her card before
being able to select the relevant floor button. The card holder will only be able to gain access to
those floors that are in his/her access rights. This is known as Secure Access mode.
However, the operator of the SMS software can generate a manual or timed command to place
a group of floors in Free Access mode (and back again into Secure Access mode when
required). When a floor is in Free Access mode, the appropriate floor relay in the node is de-
energized, which enables the elevator passenger to select the associated floor button and to be
delivered to the relevant floor without a card.
Note: For fire safety reasons, if the node has a total loss of power, all floor relays are de-
energized, and therefore all floor-selection buttons are automatically placed in Free Access
mode.
The free/secure relay on each relay board acts independently. The status of a floor on one relay board
does not affect the status of the free/secure relay on the another relay board.
Tenant Security
Tenant Security is a feature provided by some elevator control system manufacturers to control the use of
floor buttons. Each floor button has a corresponding two-wire Tenant Security input at the elevator control
system (a third-party item of equipment). When the input is shorted, the matching floor button is disabled.
Determine whether Tenant Security is required. The decision affects how the relays are wired on the Relay
Boards, as shown in the M2150 MULTICAB Elevator Controller (Master Unit) Installation Instructions.
Fireman's Switch
A optional "Fireman's Switch" can be connected to the Elevator Interface Board. When the switch is open
circuit, all relays on the relay board(s) are de-energized, giving free access to all floors. Determine whether
a Fireman's Switch is required.
Coordination with other Contractors
Installation of the elevator node requires close coordination between the installer of the elevator node and
the reader and elevator manufacturers. The responsibilities of each should be clearly understood by both
parties before any work begins.