Innotech Genesis V4 System - Manual (Page 85)

Installation Instructions for Innotech Genesis Systems
Edition 011100
A-4
A-4.1.2. Linking Networks in Different Locations. When linking networks in
different buildings, or when linking modules supplied from different switchboards, isolation
must be provided to eliminate earth loops. Use a GENII RPTR Repeater Module to isolate
the networks (Figure A-3). Note that the cable going to the more remote zone is always
connected to Port 2 of the Repeater Module.
Figure A-3. Linking Networks in Different Locations.
A-4.1.3. Multi-Network Arrangement. Figure A-4 shows a multi-network
arrangement consisting, effectively, of four separate networks. Each is wired in a bus
topology and each could be up to 1000 metres long. The networks are linked by the
electronics in the Repeater Modules. The GENII MPI Modem and Printer Interface does
not need to be an isolated version but it should be noted that the Comms cable connecting
Ports 2 of the Repeater Module will be earthed through the MPI via the PC and the printer.
The correct port of the Repeater Modules must be used to maintain the integrity of isolation
between sections.
Figure A-4. Multi-Network Arrangement.
Note: Maximum Cable Length = 1000 Metres
Zone A Zone B
Repeater
See Note See Note
1
2
Zone B Zone A
Repeater
See Note See Note
1
2
Note:
Maximum Cable
Length =
1000 Metres
Repeater
See Note
S
ee
No
te
See Note
Repeater
2
1
Repeater
See Note
2
1
2
1
MPI PRINTER MODEM PC