iBox/iBox Kit
Installation and Maintenance Guide
GE Grid Solutions
994-0047-5.10-4 GE Information
Connecting Serial Interfaces, continued
COM1
Options
In addition to the standard characteristics, COM1 has the following optional
characteristics:
• Jumper-selectable (JP3) radio key, open-collector output
• Communication parameters, determined by the protocol application.
COM2
Options
COM2 can optionally be used to connect to a satellite time-code receiver, as follows:
Time code J3 Pin Interface Signal
IRIG-B 8 RS-232 CTS2
Rugby Clock 2 RS-232 RX2
5 RS-232 COM
IRIG-B Output
Options
IRIG-B receivers are available with modulated and/or unmodulated output options. If
the unmodulated output of the receiver is a coaxial connection, a converter will be
required to interface to the iBox.
COM Ports
COM ports provide the following:
• Variable communication parameters
• Optional software flow control
• Optional hardware flow control
• Out-of-sequence transmission of one byte of data
• Support for several I/O timers
• Transmission of break characters
COM Port
Options
The COM1, COM2 and COM3 serial ports are programmed using SGConfig for:
• RS-232 or RS-485
• RS-485 2-wire or 4-wire (2W/4W)
Note: The 2W/4W selection in SGConfig only affects the interface’s internal
software control (handshaking). It does not change the physical
characteristics of the communication ports.
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