P/N 06-236530-001 2-29 August 2013
2-15 RS-232 COMMUNICATIONS PORT
The ARIES Control Unit has two RS-232 communications ports (J3/RS232B and J8/RS232A) to
connect to the Intelligent Interface Module (IIM) and various third-party supplementary devices
such as serial printers and graphical monitoring systems.
Note: It is recommended that the RS232B port (J3) be used when only a single RS232 port is
necessary.
• 9600 Baud Rate
•No Parity
• 8 Bit Word Length
•1 Start Bit
•1 Stop Bit
The RS-232 connection to the main printed-circuit board is via an RJ12 socket. The following
signals are communicated via the RJ12 socket’s pins:
Note: Pin No. 2 is not used.
The RS-232 communications port can be connected to its associated supplementary device with
a standard RS-232 cable of up to 50 feet in length.
Figure 2-31. RS-232 Communications Ports
Table 2-2. RJ12 Socket Pin Signals
Signal Designation Pin No.
Transm it Data TX 1
Signal Ground Gnd 5
Request to Send RTS 3
Clear to Send CTS 4
Receive Data RX 6
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