Selector System; Absolute Position System (Aps) Selector - GAL GALaxy eHydro Manual

GALaxy eHydro Elevator Controller
. 1 Main I/O Board
2 . Main CPU
3 . PI Driver Board
4 . Car I/O
5 . Terminal Block
and Option
Section
6 . Power Supplies
Figure 1-0: Typical Physical Layout of Top Cabinet

1.4 Selector System

The selector system for the GALaxy controller is an Absolute Position System with an encoded
touchless tape.

1.4.1 Absolute Position System (APS) Selector

The Absolute Position System Selector uses an encoded tape that is read by two independent
cameras. The dual camera device is SIL3 rated to supply position and velocity data over two
independent CAN bus channels. One CAN bus channel connects directly to the MAIN CPU and the
second CAN bus channels connects directly to the NTS processor. During setup both processors learn
the hoistway floor positions and slowdown limits. Each processor's outputs control signals and door
zone status to the Safety PAL for independent redundancy checking.
This selector system delivers 0.5mm accuracy, 50.8 pulses per inch. A block diagram of the Absolute
Position System is shown in Figure 1-1.
Section 1 – Product Description
7 . Soft - Starter
8 . Power
Distribution
9 . Transformer
1-3