8
Elevator Restriction System Installation and Operation Manual
Introduction
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.
If the access point is installed outside the elevator cab, then the resident must call
the elevator first, then swipe a card at the access point. The timer must be long
enough for the elevator to descend from the top floor to the lobby, and for the
resident to enter the elevator cab and press a button.
See LT-995 TX3 System Configuration and Administration Manual for
instructions on configuring a card access system.
1.4
Card Access System and Old Elevator Restriction
Firmware
1.4.1
Firmware Versions 3.1.x
Figure 2 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 2.
Elevator Restriction in a Card Access System
When a resident swipes a card at Access Point 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.
Note:
Each access point controls a specific elevator restriction unit. For
this reason, install an access point inside each cab. Wire the relays of
each ERU identically.
See LT-995 TX3 System Configuration and Administration Manual for
instructions on configuring a card access system.
Access
Point C
ERU 1
ERU 2
Cab A
Access
Point A
Cab B
controls
ERU 3
Cab C
restricts
controls
restricts
controls
restricts
Access
Point B
