SATELLINE-EASy / SATELLINE-EASy 869
User Guide, Version 3.0
18
4
SERIAL INTERFACE
The radio modem is referred to as DCE (Data Communication Equipment) whereas the device
connected to it, typically a PLC or a PC, is referred to as DTE (Data Terminal Equipment). The
15-pin female ‘D’-type connector of the radio modem contains the connections required to
establish data communication between the radio modem and DTE.
In order to transfer data, the physical interface between DCE and DTE must be compatible and
properly configured. This chapter describes shortly the basics of the physical interface options,
the related settings and the operation of the serial interface.
The radio modem contains two separate serial ports Port 1 and Port 2:
•
Only one port at a time can be selected for communication.
•
Port1 is configured ON by default.
•
The physical interface of Port 1 is always RS-232.
•
The physical interface of Port 2 depends on which type of internal power/interface-
module has been installed at the factory and the selected settings.
SATELLINE-EASy - Available serial port interfaces
Serial Port
Physical interface Power/Interface module identifier
Port 1
RS-232
Port 1 is always RS-232
Port 2
RS-422/RS-232
(RS-485 Note*)
Module ID: IM01 (Operating v6...+30 V
DC
)
Module ID: IM03 (Operating v3...+9 V
DC
)
LVTTL (3.3 V)
Module ID: IM02 (Operating v6...+30 V
DC
)
Module ID: IM04 (Operating v3...+9 V
DC
)
TTL (5 V)
Module ID: IM05 (Operating v6...+30 V
DC
)
Module ID: IM06 (Operating v3...+9 V
DC
)
SATELLINE-EASy 869 - Available serial port interfaces
Serial Port
Physical interface Power/Interface module identifier
Port 1
RS-232
Port 1 is always RS-232
Port 2
RS-422/RS-232
(RS-485 Note*)
Module ID: IM01 (Operating v6...+30 V
DC
)
LVTTL (3.3 V)
Module ID: IM02 (Operating v6...+30 V
DC
)
TTL (5 V)
Module ID: IM05 (Operating v6...+30 V
DC
)
Note*) RS-422 can be adapted to RS-485 externally. See paragraph RS-485 interface.
The handshaking signals apply to the selected serial port (Port 1 or Port 2). The handshaking
signals are CD (Carrier Detect), RTS (Ready To Send), CTS (Clear To Send), DSR (Data Set
Ready) and DTR (Data Terminal Ready). The physical level of these signals is always RS-232.
The wiring and cable connections are illustrated in chapter INSTALLATION.
