IC-485S/IC-485SIINSTALLATION
2-2 SWITCH FUNCTION DESCRIPTION
Refer to the location of the SW1 and SW2, please see Figure 1- 1.
IC-485S:
IC-485SI:
SW 1: Device Mode Selection
Position 1: DCE means the IC-485 is set at DCE mode and it must be connected to a DTE device.
Position 2: DTE means the IC-485 is set at DTE mode and it must be connected to a DCE device.
Position 3: Monitor means the IC-485S is set at monitor mode and it is used to monitor
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INSTALLATIONIC-485S/IC-485SI
the RS-485 line signals (for IC-485S only).
SW2: Transmitting and Receiving mode selection
Position 1: (TxON, RxON) means the IC-485 is always in transmitting mode and in re- ceiving mode.(using in Point-to-Point mode)
Position 2: (TxRTS, RxRTS) means the K-485 is in transmitting mode while RTS signal is at high level and it is in receiving mode while RTS signal is at low level.(using in Multidrop mode)
Position 3: (TxRTS, RxON) means the IC-485 is always in receiving mode and it is in transmitting mode only while RTS sig- nal is at high level.(using in Multidrop mode to monitor the RS-485 line signals)
Note: DTE means Data Terminal Equipment.
DCE means Data Communication Equipment.
More detailed information, please refer to the Appendix.
