GE DigitalFlow GS868, Руководство для стартапов

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Installation 1-11
March 2008
Wiring the RS485 Interface
Use the optional RS485 serial port to network multiple GS868
flowmeters to a single computer terminal. Upon request, the standard
RS232 port on the GS868 may be configured as a two-wire, half-
duplex RS485 interface, through a device such as the INMAC Model
800052 RS232-RS422/RS485 converter.
To wire the RS485 serial port, refer to Figure 1-10 on page 1-20 and
complete the following steps:
1.
Disconnect the main power to the unit and remove the cover.
2.
Install the required cable clamp in the chosen conduit hole on the
side of the electronics enclosure.
3.
Feed one end of the cable through the conduit hole, wire it to
terminal block J1 and secure the cable clamp. Connect the other
end of the cable to the converter, as shown in Figure 1-4 below.
Figure 1-4: Typical RS485 Connections
!ATTENTION EUROPEAN CUSTOMERS!
To meet CE Mark requirements, all cables must be installed
as described in Appendix A, CE Mark Compliance.
4.
If wiring of the unit has been completed, reinstall the rear cover on
the enclosure and tighten the set screw.
NC 6
NC 7
RX 8
TX 9
1 TD OUT
2
3
4 RD IN
GS868 Converter