DigitalFlow™ XGM868i Startup Guide 11
Chapter 1. Installation
1.7.4 Wiring the Serial Port
The Model XGM868i flowmeter is equipped with an RS232 or an RS485 serial interface. An RS485 option is also
available with MODBUS capability. When the MODBUS option is present, the XGM868i may also have the standard
RS232 serial interface.
The serial port is used to transmit stored data and displayed readings to a personal computer by connecting the meter’s
serial interface to the serial port of the PC. In addition, the Model XGM868i can receive and execute remote
commands, using the Instrument Data Manager or PanaView software via this link.
For more information on serial communications refer to your EIA-RS Serial Communications manual (916-054).
Proceed to the appropriate sub-section for wiring instructions.
!ATTENTION EUROPEAN CUSTOMERS!
To meet CE Mark requirements, all cables must be installed as described in Appendix A,
CE Mark Compliance.
1.7.4a Wiring the RS232 Interface
Use the serial port to connect the Model XGM868i flow transmitter to a printer, an ANSI terminal or a personal
computer. The RS232 interface is wired as Data Terminal Equipment (DTE). Table 1 lists the standard cables available
from the factory for this purpose.
Each of the cables listed in the table above is available in several standard lengths. However, a user-supplied cable may
be used, if preferred. In either case, wire the XGM868i end of the serial cable in accordance with the pin designations
listed in Table 2 on page 12.
Table 1: GE Serial Cables
Part Number PC Connector XGM868i Connector
704-659 DB-25 Male Flying Leads (5)
704-660 DB-9 Male Flying Leads (5)
704-661 DB-25 Female Flying Leads (5)
704-662 DB-9 Female Flying Leads (5)
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