10
Elevator Restriction System Installation and Operation Manual
Introduction
1.5
Telephone Access System and New Elevator
Restriction Firmware
Figure 4 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 4.
Elevator Restriction Units (ERU) and a Telephone
Access Controller
Floors are grouped into floor groups. For example, consider a 4-floor building
where residents are allowed access only to the floor they live on and the ground
floor. There are 3 Floor Groups:
•
Floor Group 1: Floors 1 and 2
•
Floor Group 2: Floors 1 and 3
•
Floor Group 3: Floors 1 and 4
Each resident is assigned to one of these Floor Groups depending on which floor
he lives on. Each resident is also assigned one or more ERUs.
When a resident grants a visitor access, the Telephone Access Controller
activates the resident’s Floor Group on the ERUs that are assigned to that
resident, for a configurable amount of time.
ERU 1
ERU 2
ERU 3
1
2
3
4
5
6
7
8
9
r
*
0
#
i
Telephone Access
Controller
controls
controls
controls
