MAN1106-07-EN_XL+_UserManual
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CHAPTER 10: SERIAL COMMUNICATIONS
10.1 Overview
XL+ OCS models provide three independent serial ports on 8-pin modular RJ45 connectors,
which are labeled MJ1, MJ2, and MJ3. RS-232 or RS485 is available on MJ1. By default, MJ1 can
be connected to the COM port of a PC running Cscape, for OCS programming. In addition, MJ1,
MJ2, and MJ3 can be used for application-specific communication, using a variety of standard
data exchange protocols.
The next two 8-pin modular RJ45 connectors, which are labeled MJ2 and MJ3, provide a
multiplexed serial port, which can be configured for either RS232 or RS485. Both MJ2 and 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
a multiplexed serial port, which can be configured for either an RS232
interface with RTS/CTS handshaking or a half-duplex RS485 interface
. MJ2 and MJ3 serial ports
can be configured as either RS232 or RS485. The MJ2 and MJ3 RS485 interfaces provide
software controlled internal termination and biasing resistors.