NextNet Wireless Mobile Subscriber Unit, Руководство по установке

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5
Powering the MSU
You must prepare the power cable for installation before you attach the power cable to the
battery.
Preparing the power cable for installation
The power cable is 21 feet long. You must insert an 5 Amp, normal blow fuse from the
assembly kit into the power cable’s fuse holder in order to protect the MSU from power
surges.
You can use the cable at its full length, or you can cut the power cable down to the desired
length.
Installing the fuse
Install the fuse:
1
Pull apart the fuse holder and push the fuse into the holder. The fuse must be a 5 Amp
normal blow fuse, AGC style.
2
Push the fuse holder back together. Make sure no space appears between each half of the
fuse holder.
Using the cable at full length
To use the cable at full length:
1
To prepare the cable to be attached to the battery or terminal block, strip the end of the
power cable. The red wire is then exposed.
2
Coil the excess cable.
Changing the length of the cable
To change the length of the cable:
1
Determine the distance from the battery or other power source to the MSU.
2
Cut the power cable to an appropriate length. Use a wire crimp to crimp the end of the
inline fuse holder back onto the power cable at the desired location on the cable.
Attaching MSU’s power cable to the battery
Note: Make sure the fuse is installed on the inline cable before attaching the MSU to power.
The MSU can be powered by a regular car battery or a deep cycle battery such as a marine
battery used on a boat.
When selecting a battery, note that the MSU draws about 2 Amps of power when the MSU is
continuously transmitting data in the heaviest downlink configuration.
To power the MSU, connect it to a positive (+) battery source. Depending on the vehicle’s
battery or the availability of a fuse block, you can accomplish this by using the power cable’s
wire, a flat spade connector, or a quick disconnect connector (female connector, tab
connector).
The connectors are included in an assembly kit that ships with the MSU.