CALAMP WIRELESS NETWORKS INC. BDD4T83-2 ユーザーズマニュアル

Referring to Figure 3, the Radio assembly unit
receives two separate 13.8 VDC power inputs
from a “T800 Slimline” dual power supply typi-
cally rack-mounted right below the main assem-
bly radio chassis.

The T800 is made up of two separate power sup-
ply units joined in a single chassis:

•

  A T807 using convection cooling is rated up

to 15A at 13.8VDC. It supplies all the radio
modules other than the Power Amplifier.

•

  A T808 using convection and fan cooling is

rated up to 25A at 13.8VDC. It supplies only
the Power Amplifier module.

Normally used at room ambient temperatures,
they can operate within their specifications over a
range of –10 to +60 °C.

Both power supply modules are internally con-
nected to ground via their individual, rear-
connected, seven-foot standard 120 VAC power
cords. Nevertheless, each requires a separate se-
cure electrical ground connection. Individual
grounding tabs are provided next to the power
connectors.

Similarly, the Radio Assembly chassis requires a
secure ground connection. A threaded grounding
binding post fitted with a knurled binding-nut is
provided on the chassis next to DC input 2.

Separate grounding leads with appropriate con-
nectors are supplied (either in the courtesy small-
parts kit or with one end fastened to the equip-
ment.

For each of the power supply modules:

1.  Fit one end of the grounding lead’s push-

on connector onto the grounding tab.

For the Radio Assembly chassis:

1.  Install the grounding lead’s lug over the

binding post and firmly hand-tighten the
binding-nut.

For both A and B

2.  Fit the slotted connector (on the other

end of each of the grounding connector)
under a conveniently located screw on
the rack frame or other support surface.
Scrape away paint if needed to ensure
clean contact.

3.  Apply anti-corrosion compound where

paint scraping was done.

4.  Ensure by testing continuity that a secure

electrical and mechanical connection is
achieved.

If a –DC rail (0V) is installed as part of the sys-
tem, the grounding leads may alternatively be
fitted to the rail terminal.

Press both red power buttons located on the front
of the module to have complete power distribu-
tion to the Radio assembly.

The power supply front panel LEDs indications
are:

On

Green

Power enabled *

Stby

Red

Power disabled *

OL

Steady Red

Current Overload

On & OL

Flashing green and

red respectively

Over voltage

* 

To remove voltage from the power supply PCB, disconnect

the main power cords.

The Radio assembly is fused at the rear of the
chassis:

•

  Fuse 1 is a 32-volt MDL (slow-blow) 10A

•

  Fuse 2 is a 32-volt MDL (slow-blow) 30A

Note: the fuses form factor and their locations
may differ from Figure 3.