MAN0964-13-EN_XL4_UM
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CHAPTER 10: SERIAL COMMUNICATIONS
10.1 Overview
All XL4 OCS models provide two serial ports, which are implemented with single 8-pin modular
RJ45 connectors, are labeled MJ1 and MJ2. The MJ1 serial port is RS-232 while the MJ2 port is
RS-485. MJ1 defaults to OCS programming by connecting it to the COM port of a PC running
Cscape. In addition, both MJ1 and MJ2 can be used for application-specific communication,
using a variety of standard data exchange protocols.
10.2 Port Descriptions
The MJ1 serial port contains a RS-232 interface with RTS/CTS handshaking.
The MJ2 serial port contains half-duplex RS-485 interface with no handshaking. The MJ2 RS-
485 interface provides switchable termination and bias resistors internally.
10.3 Serial Port
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