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INSTALLATION MANUAL
CAA480A
Elevator Controller
Connecting the CAA480A using the Fail-Secure method offers more security in the case
of a power or communication failure. If either were to occur, then the elevator car's floor
buttons would become inoperative. Refer to Figure 6. Connecting the CAA480A
in the Fail-Secure method:
1. Connect the "COM" terminal of the desired floor control relay from the CAA480A
to the desired elevator control system floor button input terminal.
2. Remove the connection between the elevator car floor button and its corresponding
elevator control system floor button input.
3. Using a loop terminal added by the installer, connect the "NO" terminal of the desired
floor control relay from the CAA480A to the added loop terminal. Then connect
the elevator car floor button to the added loop terminal.
Figure 6: Standard Button Control (Fail-Secure):
Elevator Car
Floor Buttons
Elevator Car
Card Reader 1
Remove the connection between
the Elevator Car Floor button
and the Elevator Control system's Floor
Button input terminal.
Elevator Car
Floor Button
Connect the Elevator Car
Floor Button to the added loop
terminal
Please note that for UL / ULC installations, the button c ontrol connection must be configured
in Fail-Safe mode.
8] FLOOR SECURITY INPUT CONTROL
Elevator Car
Floor Button
connection wires
To
Floor Button
terminals
Elevator
Control
System
To
Floor Button
relays
Elevator Control System
Floor Button's "common" terminal
Floor Button's input terminal
Loop terminal added
by installer
E-BUS
CAA480A
CTV900A
Elevator
Controller
Controller
CAA480A Elevator Controller
COM1
NO1
NC1
COM2
NO2
cdvigroup.com
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CAA480A
Elevator
Controller
Card Reader 2
for second
Elevator Car
9
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