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MAN1029-10-EN_EXL10_XL10P_UM
CHAPTER 10:
SERIAL COMMUNICATIONS
10.1 Overview
All EXL10/XL10 PRIME OCS models provide two independent serial ports, on the first 8-pin modular RJ45
connector, which is labeled MJ1/MJ2. The MJ1 serial port is RS232 while the MJ2 port is RS485. By
default, MJ1 can be connected to the COM port of a PC running Cscape, for OCS programming. In
addition, both MJ1 and MJ2 can be used for application-specific communication, using a variety of
standard data exchange protocols.
The second 8-pin modular RJ45 connector, which is labeled MJ3, provides a multiplexed serial port,
which can be configured for either RS232 or RS485. MJ3 can be optionally set for OCS programming via
the System Menu for connection to the COM port of a PC running Cscape.
10.2 Port Descriptions
The MJ1 serial port contains an RS232 interface with RTS/CTS handshaking. The MJ2 serial port contains
a half-duplex RS485 interface with no handshaking. The MJ3 serial port can be configured as either
RS232 or RS485. The MJ2 and MJ3 RS485 interfaces provide switchable termination and bias resistors
internally, which can be enabled/disabled with DIP switches.
10.3 Wiring and Dip Switches
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Troubleshooting
