Johnson Controls S300 Series User Manual

Hardware Installation S300-DIN-RDR2S Module
24 24-10239-413 Rev. A
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© 2010 Johnson Controls, Inc.
RS485 Connection
Setting the End-of-Line Switch (SW1)
Network devices at either end of the RS485 network must be set as network
terminated devices. This is done with the use of the End-of-Line (EOL) switch. The
S300-DIN-RDR2S module has one End-of-Line switch consisting of two resistors.
Turn them both on (up) or both off (down) according to the position of the RDR2S
module on the RS485 bus.
Factory Default: ON (both up)
EOL Switch
NOTE
Before changing the EOL position, remove the 24 VDC supply power to
the RDR2S and wait for the Power LED to go off.

Johnson Controls S300 Series Specifications

General

Brand	Johnson Controls
Model	S300 Series
Category	Control Unit
Language	English