Dc Main Power Supply Fuse Size And Type - Emerson Rosemount Apex Reference Manual

™
APEX and APEX Sentry
Figure 2-20. DC Power Supply
Connections with 4-wire
Installation and Separate 4–20
mA Power Supply
APEX Radar
10.5–55.0 V dc
Power Supply
Indicator/DCS
2-26
™
Gauge
(fused)
18-36 V dc
Main Power
Supply
NOTE
DC gauges can be configured as a 3 wire gauge if a jumper is used between
the power supply and the loop wiring.
The power terminals are located under a sliding safety cover on the terminal
blocks. This sliding cover exposes only one terminal at a time to guard against
electrical shock. The safety cover must be left on while wiring the radar
gauge. If the cover has been removed, the word "DANGER" appears near the
terminals.
NOTE
When wiring multiple devices, run separate wire pairs to each radar gauge—
do not "daisy chain" or use common return wiring configurations. In other
words, while it is acceptable to multidrop gauges in the 4–20 mA loop, it is not
acceptable to multidrop the power supply loops.

DC Main Power Supply Fuse Size and Type

Be sure to use the proper fuse size and type. Failure to use the appropriate
fuse could result in improper operation or damage to the gauge.
The radar gauge with a dc power supply uses the following
fuse size and type (Rosemount Part No. C53323-0107):
• 2 AG Fuse, 1A, 250 V, Fast Action
Radar Gauge
APEX Radar Gauge with Output Code 2 or
10.5-55 V dc
Supply
Indicator/DCS
See note regarding grounding on page 2-23.
Reference Manual
00809-0100-4731, Rev FA
APEX Sentry Radar Gauge
April 2003
18-36 V
dc
Main