BACnet Router Start-up Guide
Page 12 of 27
3.4
R1 Port Small DIP Switches
NOTE: Only applies to FS-ROUTER-BAC models.
Gently remove the BACnet Router enclosure to access the small DIP switches for the R1 Port.
•
If more than one RS-485 device is connected to the network, then the field bias resistor switch
needs to be enabled to ensure proper communication.
See
Figure 7
for the orientation of
switch positions referenced below.
o
The default factory setting is OFF (switch position = right side)
o
To enable biasing, turn the bias switch ON (switch position = left side)
NOTE: Biasing only needs to be enabled on one device. The BACnet Router has 510 ohm
resistors that are used to set the biasing.
•
If the FieldServer is the last device on the trunk, then the end of line (EOL) termination switch
needs to be enabled.
See
Figure 7
for the orientation of switch positions referenced below.
o
The default factory setting is OFF (switch position = right side)
o
To enable the EOL termination, turn the EOL switch ON (switch position = left side)
Figure 7: Bias Resistor DIP Switches & EOL
Bias Resistor Switch
End of Line Switch
