Introduction
Elevator Restriction System Installation and Operation Manual
9
1.4.2
Firmware Versions Lower than 3.1.x (for Version 3 Panels) and
Lower than 2.4.x (for Version 2 Panels)
Figure 3 is a conceptual diagram of an example system that has three elevator
cabs. There is an elevator restriction unit (ERU) restricting each cab, for a total of
three elevator restriction units. There is a card reader associated with each cab,
for a total of three access points.
Figure 3.
Elevator Restriction in a Card Access System
When a resident swipes a card at the access point in Cab A, the system checks the
access level of the card. The card’s access level determines which floors the card
has access to. ERU 1 restricts only Cab A. Cabs B and C are unaffected.
The ERU relays are active for a configurable amount of time, up to 600 seconds.
This timer starts when the access point reads the card.
See LT-995 TX3 System Configuration and Administration Manual for
instructions on configuring a card access system.
Access
Level C
ERU 1
ERU 2
Cab A
Access
Level A
Cab B
controls
ERU 3
Cab C
restricts
controls
restricts
controls
restricts
Access
Level B
