Arbiter Systems 1200B, Руководство по эксплуатации

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3.4 Antenna Input 9
CAUTION: Replace fuse only with another of the same type and rating. See Table 3.1 above for
the correct fuse configured for your power supply option.
3.4 Antenna Input
Figure 3.3 illustrates the female Type F, GNSS antenna input, connector. This connector also
supplies 5 Vdc through the cable to energize the antenna and inline preamplifier if installed. For
further information, see Chapter 4, Antenna and Cable Information.
Figure 3.3: GNSS Antenna Connector
ANTENNA
3.5 Event Input
For timing external events based on the GNSS-synchronized time, you may use ports 1, 2, and 3,
COM1 (RS-232 port), and one of the optional BNC connectors. Figure 5.1 illustrates the locations
of these connectors and the internal jumpers.
3.6 Single Fiber Optic Output
The clock may be equipped with an optional, multimode fiber optic output with ST connector,
located between COM1 serial port and the antenna connector. The output may be any digital
signal available in the clock. For additional information on this optional output, see Appendix B.
3.7 RS-232 and RS-485 Communication Ports
The clock has two standard communication ports, COM1 and COM2. RS-232 is supported on
COM1 and COM2 and RS-485 transmit only is supported on COM1.
Figure 3.4: Communication Ports, COM1 and COM2
RS-232C and RS-485
COM 1
RS-232C
COM 2
3.8 SPDT Relay Contacts
A set of SPDT relay contacts provide “failsafe” status for a number of clock conditions including:
out-of-lock, alarm, fault, and loss of inlet power. Failsafe means that the relay is in fault state if
power is lost. For additional information on relay setup, including specifications, see Sections 7.7, 8.4
and Appendix A. Figure 3.5 illustrates the three contacts. For a list of faults, see Section 6.2.2.
Faulted or Power OFF: NC to COM is shorted, NO to COM is open.
Not Faulted and Power On: NC to COM is open, NO to COM shorted.