Drucegrove DragonFly User Manual 1.4
Page 12
DragonFly System Installation
Connecting to a Single Elevator
For the most basic operation of displaying the elevator car position and direction, a DragonFly only needs to be
connected to a Drucegrove 2-Wire bus. The 2-Wire bus will provide both power and data to the DragonFly driving
circuitry. For a TFT20 series position indicator, this 2-Wire bus will also power the TFT screen. For the TFT500 Omni
Driver, a separate external screen will be provided and this will have a 12V DC power supply which will need mains
110-230V AC input.
The following diagram shows how a TFT024 positioned inside the elevator car should be connected back to a
Drucegrove IND055 2-Wire controller:
Additional 2-Wire equipment may be connected to the 2-Wire bus, including other FireFly and DragonFly TFTs (of
mixed sizes), LED segment and dot matrix PIs, gongs and speech announcer units.
Elevator Car
TFT024
DragonFly
7.0” TFT PI
Machine Room
110-230V
AC Input
}
Inputs from
Elevator Controller
2 Wires for
Power and Data
IND055
Controller
Interface
24V DC
PSU
