Innotech Genesis V4 System - Manual (Page 89)

Installation Instructions for Innotech Genesis Systems
Edition 011100
A-8
A-4.2.3. Genesis II Connections. The Common connection provided by the tracks
on the printed circuit board permanently link the following points:
•
Terminal 2 (the Zero Volts of the AC supply),
•
Terminals 19 and 20 (the connections for the screens of the analogue inputs),
•
The shell and Pin 5 of the DB9 connector for RS232.
Terminal 91 (the connection for the screen of the Comms cable) is not permanently
connected to Common of the Digital Controller. It can be linked to Common by two shunts
as shown in Figure A-8. These shunts are located on the bottom printed circuit board under
the edge of the top board. On Genesis II Digital Controllers, the screen(s) of the Comms
cable(s) can always be connected or joined in Terminal 91 because it can be isolated from
the Common of the Digital Controller by removing the two shunts. To check that the
screens are isolated, only the two outer shunts on each side should be fitted. The alternative
terminal layout can be found on older versions of the printed circuit board. The terminal
numbering is the same.
Figure A-8. Genesis II Connections.
Shunt
Links
Terminal 91 Screen Connection.
If Shunt Links 3 or 5 are Fitted, Terminal 91 is connected to Terminal 2 and Screen.
1 2 19 20
Screen
89 90 91 92 93
Terminals 2, 19 & 20
(Screen), 95 & Pin 9
of RS232 are Joined
InsideThe Digital
Controller.
END CONNECTION
89
90
91
92
93 89
90
91
92
93 89
90
91
92
93
LOOPING CONNECTION
89
90
91
92
93
EQUIVALENT CIRCUIT
Screen Continuity Maintained
by Joining at Terminal 91
NOTE: ON GENESIS II ALWAYS CONNECT THE SCREEN(S) TO TERMINAL 91
AND USE SHUNT LINKS 3 & 5 TO CONNECT OR ISOLATE THE SCREEN.
89
90
91
92
93
LOOPING CONNECTION
89 90 91
92 93 94
Alternative Terminal Layout.
When links are fitted,
Terminals 91 and 94 are Internally
Connected to Terminal 2 & Screen
(Terminals 19 & 20).