Johnson Controls Metasys Intelligent Fire Network Technical Manual page 47

Setting the
Ground Fault
Switch
Node
Addresses
Commissioning and
Troubleshooting Procedures
The switches on the MIB enable or disable ground fault detection. SW1
corresponds to Channel A and SW2 corresponds to Channel B.
All network nodes connected to either the N1 LAN or the FN must have a
node address (also referred to as a node number) to identify it on either
one or both of the networks. IFC panels, INAs, Fire-Net NCMs, and
Fire OWSs are all FN nodes. The IFC panels and INAs are only connected
to the FN, while the Fire-Net NCM and Fire OWS are connected to both
the N1 LAN and the FN.
Since they connect to two networks, certain restrictions apply to the
Fire-Net NCM and Fire OWS node addresses. The node addresses for the
Fire OWS and Fire-Net NCM must be:
• within the ranges specified in the IMPORTANT boxes below
• the same number on both the N1 LAN and the FN
IMPORTANT: The Fire-Net NCM must have an FN (Fire Network)
and Metasys Network node address between 70-79.
Fire OWS must have an FN and Metasys Network
node address between 150-159. Addresses above 249
must not be used on the FN.
Switch set On to enable
ground fault feedthrough.
Switch set Off to disable
ground fault feedthrough.
Figure 20: MIB Switches
IFC Networking—Metasys Intelligent Fire Network
switch
47