Innotech Device Network Cabling - Manual (Page 23)

Innotech Device Network Cabling Installation Instructions
© Mass Electronics Pty Ltd 2007 Chapter 2 – Primary Networks Page 23
2-3 BACnet Gateway (IG03)
The BACnet Gateway is different to any other Innotech device in that it acts as a Network Master. It
has a PC and Net Comms connection. As there is only a single shield terminal the shield for each
network should be connected to this terminal. All other Innotech wiring guidelines should be
followed.
The BACnet network should always be totally separated from the Innotech network and any BACnet
specific wiring rules should be adhered to.
PC
+
S N+
PC
-
N
-
Figure 2-11: Correct Wiring of Innotech BACnet Gateway Communications
2-4 Older Controllers
There are some earlier devices, version V3, V3.1 and V3.2 Genesis and MPC controllers that do have
jumpers available to internally connect the ‘S’ terminal to either the 0 V terminal or a separate Earth
terminal.
These jumpers have not been fitted at point of manufacture to suit the style of earth connection recommended in
this document.
NOTE
2-5 Isolated Devices
Regardless of the type of isolation used in either the current model devices (all now standard with
fully isolated soft earth) or older series controllers (plug-in optional isolation card), there is no
effect on the primary network earth requirements. The isolation is not on the primary network, but
between the primary network and the power supply of only that respective controller. All network
rules apply as stated.