Telenetics MIU Dial or Leased Line modem with RS-485 manual SB-1 Closed on RS485 Received RX & /RX

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3.5 MIU/485 B switch (external)
SB-1	Closed (ON) RS485 Received RX & /RX		DC terminated with SB-2 Closed
SB-1	Open (OFF) RS485 Received RX & /RX		AC terminated with SB-2 Closed
SB- 2	Closed (ON) RS485 Received RX & /RX terminated
SB- 2	Open (OFF) RS485 Received RX & /RX high impedance (Z)
SB-3 & 4 Closed (ON)		2- wire configuration or loopback mode
SB-3 & 4 Open (OFF)		4- wire configuration

Install Op and Diags for MIU Modems and RS485 (0049-0002-010A)

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Contents Installation, Operation and Diagnostics Table of Contents Product Description Product OverviewRS-232 Configuration Connector P2 Mius LED, Switch & Serial Connector SpecificationsRS485 Configuration Connector P1 LEDSB-1 Closed on RS485 Received RX & /RX Regulated Powe r Supply Range 48.0 to 220 Volts AC/DC Power Connector P3 MIUSpeed Distance Environmental SpecificationsApprovals Sheet TWO MIUXXX\485 Power ConnectionMIUXXX/485 DIP Switch Setup Connector P2 RS-232 Configuration Connector DB9 MIU Appendix A.CONNECTOR PIN DefinitionsModule C-1 MIU S3 external RS485 Connection Failure Appendix C. Connector DiagosticsDiagnostics RS485 Connection Failure