Innotech Genesis V4 System - Manual (Page 90)

Installation Instructions for Innotech Genesis Systems
Edition 011100
A-9
A-4.2.4. GENII POLY SWITCH Board. The GENII POLY SWITCH RS485
Protection Plug board can only be used on Genesis II Digital Controllers. The POLY
SWITCH board does not provide fully isolated data lines. It isolates the screen of the
Comms cables from the Common on the Digital Controller.
The POLY SWITCH board provides a level of protection against some types of over-
voltage. It protects the RS485 ICs if 24Vac is applied to the Comms Terminals 89 to 93.
To fit a POLY SWITCH board (See Figure A-9):
a. Ensure that the power to all the connections to the Digital Controller is turned off.
b. Remove all shunts from the dual 14-way pin strip on the bottom printed circuit board.
c. Turn the POLY SWITCH Board so that all the components and the socket are facing
to the bottom printed circuit board.
d. Fit the POLY SWITCH Board onto the 14-way pin strip, making sure that the pin
strip and the socket are properly aligned.
e. Do not remove the two shunt links from the other pin strips on the bottom printed
circuit board.
NOTE
The screen links are open on a POLY SWITCH board.
Figure A-9. Genesis II POLY SWITCH Board.
Turn the Poly-Switch Board over so components face bottom board
and socket is toward bottom edge of bottom board. Fit socket onto strip.
SOCKET
Pin Strip
BOTTOM EDGE OF BOTTOM BOARD