Introduction
Elevator Restriction System Installation and Operation Manual
11
For example, Resident 1 is configured for ERU 1, 2 and 3, and for Floor Group 1
(floors 1 and 2). When Resident 1 grants a visitor access, the visitor must call one
of the cabs controlled by ERUs 1, 2 or 3. Then the visitor must enter the cab and
press the button for floor 1 or 2 within the configured amount of time. The
minimum time is 5 seconds and the maximum is 600 seconds. This timer starts
when the system grants the visitor access. This means that the timer must be long
enough for the elevator cab to descend from the top floor to the lobby, and for the
visitor to enter the cab and press the button. The distance from the access point to
the cab might also be a consideration for the timer.
See LT-995 TX3 System Configuration and Administration Manual for
instructions on how to configure a telephone access system.
1.6
Telephone Access System and Old Elevator
Restriction Firmware
Figure 5 is a conceptual diagram of an example system with three elevator cabs
and a Telephone Access Controller. There is an elevator restriction unit (ERU)
restricting each cab, for a total of three elevator restriction units.
Figure 5.
Elevator Restriction Units (ERU) and a Telephone
Access Controller
Each resident is configured for a specific ERU and a specific floor. When a
resident grants a visitor access, the Telephone Access Controller activates one
ERU and one floor on that ERU for a configurable amount of time.
ERU 1
ERU 2
Cab A
Cab B
ERU 3
Cab C
restricts
restricts
restricts
1
2
3
4
5
6
7
8
9
r
*
0
#
i
Telephone Access
Controller
controls
controls
controls
