MLis MLB-S4101, User Manual

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MLiS-S4101 Manual
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3.8.3 Default Mode
When Default Mode is selected and the Server Properties are updated (saved), all configuration settings return to their
default values.
3.8.4 RS-232 Mode
The RS-232 supports 8 channels plus Signal Ground and is configured as DTE like a computer. Signals are single ended
and referenced to Ground. To use handshaking, Flow Control must be set to RTS/CTS during Configuration. Refer to the
Pin out table for connections.
3.8.5 RS-422 Mode
The RS-422 mode supports 4 channels with full duplex operation for Receive, Transmit, RTS (Request To Send) and CTS
(Clear To Send). The data lines are in differential pairs. Ground provides a common mode reference. To use
handshaking Flow Control must be set to RTS/CTS during configuration. Refer to the Pin out table for connections.
3.8.6 RS-485 Mode
The RS-485 mode supports the Transmit and Receive Channels using 2-wire half-duplex operation. The data lines are
differential pair Ground provides a common mode reference. Refer to the Pin out table for connections.
RS-485 Receiver Biasing can be implemented from the MLB-S4101 serial server if the network does not supply it.
Remove the two side-cover screws of the serial server, slide the cover off and re-position the bias jumpers to enable
biasing (shorting).
3.9 DB9 Pin Configuration
Pin RS-232 RS-422 RS-485
1 DCD RXD (-)
2 RXD RXD (+)
3 TXD TXD (+) D (+)
4 DTR TXD (-) D (-)
5 GND GND GND
6 DSR CTS (-)
7 RTS CTS (+)
8 CTS RTS (+)
9 RI RTS (-)