R1 Port Small Dip Switches; Rs-485 Port - MSA QuickServer FS-QS-1 Series Startup Manual

2.4

R1 Port Small DIP Switches

Gently remove the QuickServer enclosure to access the small DIP switches for the R1 Port.

2.4.1 RS-485 Port

NOTE: The following only applies to QuickServer models FS-QS-1XX0 or all non-LonWorks models.
• 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 image abovefor the orientation of switch positions referenced below.
◦ The default factory setting is OFF (switch position = right side)
◦ To enable biasing, turn the bias switch ON (switch position = left side)
NOTE: Biasing only needs to be enabled on one device. The QuickServer 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
image above for the orientation of switch positions referenced below.
◦ The default factory setting is OFF (switch position = right side)
◦ To enable the EOL termination, turn the EOL switch ON (switch position = left side)
QuickServer FS-QS-1XXX Start-up Guide 13