15247-201 Rev. B – April 2009 6502B RF Distribution User Guide
7
Installation
Mounting
The Symmetricom 6502B is designed to be mounted in a standard 19-inch
equipment rack and takes up 1 U of vertical space (1.75”). The chassis depth is 12
inches.
Power Connection/Fuses/Voltage
The Symmetricom 6502B is powered from an AC source by a detachable power
supply cord. The power cord is the disconnect device. Refer to Chapter Four for
power supply requirements. The AC fuses are located inside the AC
connector/filter. The hot and neutral lines are fused separately. To change fuses,
refer to Figure 1. Open the cover on the AC connector/filter by applying a
screwdriver to the cover slot. Once the cover is open, each fuse holder may be
removed for inspection or replacement. Replace only with a 0.2A, 250V Slow
Blow as specified in Chapter four.
Figure 1 AC Input Filter/Fuses/Voltage Selector
The Symmetricom 6502B may be powered from 100/120 or 220/240 VAC. To
change the AC input between 100/120 and 220/240 V, refer to Figure 1. Open the
cover on the AC input connector by applying a screwdriver to the cover slot. Once
the cover is open, a selector switch may be rolled left or right to line up “120” or
“240” with the small window in the connector cover. Replace the cover on the AC
input connector by snapping it in place.
Caution 1:
Do not use the voltages labeled “100” or
“230”, as they are not connected.
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