GE Multilin F650, User Manual

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1-20 F650 Digital Bay Controller GEK-113000AE
1.4 650 HARDWARE 1 GETTING STARTED
1
without exceeding driver capability. For larger systems, additional serial channels must be added. It is also possible to use
commercially available repeaters to increase the number of relays on a single channel to more than 32. Do not use other
connection configurations different to the recommended.
Lightening strikes and ground surge currents can cause large momentary voltage differences between remote ends of the
communication link. For this reason, surge protection devices are internally provided. To ensure maximum reliability, all
equipment should have similar transient protection devices installed.
Figure 1–16: RS485 CONNECTION FOR 650 UNITS
To communicate through the F650 rear Ethernet port from a PC a crossover cable is required. If the connection is
performed through a hub or a switch, a direct Ethernet cable is required.
1.4.3 FACEPLATE DISPLAY
All messages are displayed on a 20x4 character LCD display. An optional graphic display is also available. Messages are
displayed in different languages according to selected model.
1.4.4 MAINTENANCE
1.4.4.1 GENERAL MAINTENANCE
F650 requires a minimum amount of maintenance when it is commissioned into service. F650 is a microprocessor based
relay and its characteristics do not change over time, as such no further functional tests are required. While the F650
performs continual self-tests, it is recommended that maintenance be scheduled with other system maintenance. This
maintenance can involve in-service, out-of-service, or unscheduled maintenance.