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Chapter 7 Specifications of the TimeProvider
Alarms
200 TimeProvider User’s Guide 097-58001-02 Revision G – April 2008
Alarms
Input Alarms
The PRS input is inhibited when a contact closure (less than 1 Ω) is present across
the PRS Alarm In connection.
Output Alarms
The output alarm connector is on the Input module, and can be either a DB25
connector or wire-wrap pins. See
Making Alarm Connections, on page 70, for a
pinout diagram of the DB-25 connector. Table 7-6 describes the contact closure for
the alarm outputs.
Power
Dual power supplies from –36 to –72 V DC. Table 7-7 lists the maximum and typical
power consumption using crystal and Rubidium IOCs.
Symmetricom recommends a 5 A fuse for the power supply to the TimeProvider
shelf.
Table 7-6. Output Alarm Specifications
Alarm Description
Minor Contact closure (NC or NO) 1 Amp Form C
Major Contact closure (NC or NO) 1 Amp Form C
Critical Contact closure (NC or NO) 1 Amp Form C
Table 7-7. Typical Power Consumption
IOC Type
Max Power (W)
per IOC
Typical Power (W)
per IOC
Crystal 40 30
Rubidium 60 40
(70 with two Rb IOCs)