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Tab. 3.3: Table for distinguishing LEDs for RxD and TxD by colour
Colour (RxD / TxD)Type of interface
red / greenRS232
orange / greenRS232 opt. separated
orange / yellowRS422/485 opt. separated
3.2.3. Labelling of SCC terminals
TxD
RxD
DTE
PLC
TxD
RxD
RedLED
DCE
RADIOMODEM
GreenLED
Fig. 3.3: Labelling of serial interface terminals
The SCC ports of the radio modem are DCE type devices. Based on standards the receiver terminal
RxD of the connected DTE device is connected to the transmitting terminal of the modem's SCC port
which is also labelled RxD. Similarly the red LED indicating transmission from SCC is labelled RxD.
3.3. Ethernet
• Connector RJ-45 for Ethernet 10BaseT and 100BaseT corresponds to the EIA TIA T568B standard.
• Informative LED diodes indicate:
• Tx – output from ETH channel
• Rx – input to ETH channel
• 100 – if lit the 100Base-TX net is indicated otherwise is 10Base-T
• LINK – indicates correctly connected link
• F.D. – indicates full duplex operation
• The direct cable serves for connecting to the Ethernet network via the hub (repeater) or switch-hub
(router).
• A crossed cable serves for connecting only two devices - MR400-MC100, MR400-PC, etc.
The following table contains connector connections and colours of conductors. For the crossed cable
the order of conductors on one side is the same as for the direct cable.
11© RACOM s.r.o. – Wideband modems – PROFI MX160
Connectors