Horner APG XL6 OCS - Manual (Page 25)

MAN0883-05-EN CH.5
March 4, 2010 Page 25 of 135 #1037
CHAPTER 5: SERIAL COMMUNICATIONS
5.1 Overview
All XL6/XL6M/XL6e OCS models provide two serial ports, which are implemented with 8-pin modular
RJ45 connectors, and are labeled MJ1 and MJ2. The MJ1 serial port is normally used (although MJ2 can
also be used) for XL6/XL6M/XL6e 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.
5.2 Port
Descriptions
The MJ1 serial port contains both a half-duplex RS-485 interface and an RS-232 interface with RTS/CTS
handshaking. Note: MJ1 shares its serial port with the optional COM module, so when an optional
Ethernet or Modem COM module is installed and active, the MJ1 connector is inactive.
The MJ2 serial port contains both a full-duplex RS-485 interface and an RS-232 interface with no
handshaking. Both the MJ1 and MJ2 RS-485 interfaces provide switchable termination and bias resistors
internally.
5.3 Wiring
Figure 5.1 along with Table 5.1 and Table 5.2 show how the MJ1 and MJ2 serial port pins are
assigned.
Figure 5.1 – MJ Serial Port Connector
Table 5.1 – MJ1 Serial Port Pin Assignments
Pin Signal Signal Description Direction
1 RX/TX+ RS-485 Receive/Transmit Positive In/Out
2 RX/TX
− RS-485 Receive/Transmit Negative In/Out
3 CTS 1 RS-232 Clear to Send Out
4 RTS 1 RS-232 Request to Send In
5 +5* +5 VDC 60mA max Out
6 0V Ground −
7 TD 1 RS-232 Transmit Data In
8 RD 1 RS-232 Receive Data Out
1
Signals are labeled for connection to a DTE device
8
1
Note: MJ1 and MJ2 look the
same but have different pin
assignments and functions.
• * +5 on XLe Rev E and later
•
* +5 on all revisions XLt and XL6 and QX351
Pin MJ1 Pins
Signal Direction
8 TXD OUT
7 RXD IN
6 0 V Ground
5* +5 60mA OUT
4 RTS OUT
3 CTS IN
2 RX- / TX- IN / OUT
1 RX+ / TX+ IN / OUT
8
1