195196 St. Petersburg,
4, Gromova Str.
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195196 St. Petersburg, 4, Gromova Str.
This email address is being protected from spambots. You need JavaScript enabled to view it.
117 $ (+VAT 20%)
The RS485-PLM-RS485 modem is a data communication device designed to transfer serial RS485 data from the existing local power lines.
It is possible to use both AC and DC lines with voltage up to 250V RMS.
The modem is protocol agnostic, it just retransmits the data being received from the RS485 or power line network. Moreover the RS485 communication parameters may change from side to side, turning the modems into protocol converters.
There are up to 16 data communication groups defined to isolate two or more different RS485 network from each other. The group ID is changeable by the on board rotary switch.
The RS485 data must be frame separated with maximum frame length of 200 bytes each. The symbol to symbol delay is interpreted as a frame separator and preprogrammed to be 30 ms.
The solution has been widely used in many field applications that require PLC to IO communications with no physical wiring access availability.
| Parameter | Value | |
|---|---|---|
| IP Rating (IEC 60509:1989) | IP 20 | |
| Supply Voltage | 80 - 250 V RMS AC/DC | |
| Terminals Type | Screw connection, 16-30 AWG | |
| Programming | Not applicable | |
| Communcation Ports | RS485 | 1 |
| PLM | Carrier Frequency | от 70 до 90 kHz |
| Output Signal Strength | 90 to 120 dBuV | |
| Expected Communication Distance | 0 to 2000* meters * depending on line characteristics | |
| Addressing | Individual, rotary switches. | |