EDM Serial-to-Ethernet Converters
User Guide ver. 2.0 | 2021-09-01
Phone: +420 538 890 720
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E-mail: [email protected]
Connector DB-9F of RS-232 interface
Interface RS-232 of converters EDM106 has the standard 9-pin connector DB-9F. The pinout of the
connector is shown in Table 3.
Table 3. Pinout of DB9-F connector.
RS-232
(connector DB-9F)
Pin
Parameter
1
Output DCD
2
Output TX
3
Input RX
4
Input DTR
5
Ground
6
Output DSR
7
Input CTS
8
Output RTS
9
Output RING
LED Indication
The converters have three LED indicators:
RX – data reception,
TX – data transmission,
ST – indication of the connection of serial ports on TCP.
Algorithm of ST indicator operation:
Three timeslots of 1.2 s. for each interface (total - 3.6 s.):
Timeslot 1 – RS-232: one flash – 500 ms, pause – 700 ms.
Timeslot 2 – RS-485(1): two flashes – 250 ms each, pauses – 350 ms.
Timeslot 3 – RS-485(2): three flashes – 150 ms each, pauses – 250 ms.
Pause between the indication periods – 3.6 s.
Fig. 3. Algorithm of ST indicator operation.
