Installation and Startup
Rev. 1 June 2019
19
41113042
Grounding the RV55 Router Chassis
For DC installations (with a fixed “system” ground reference), Sierra Wireless strongly
recommends always grounding the RV55 chassis to this system ground reference.
To ensure a good grounding reference, either:
•
Attach the RV55 to a grounded metallic surface.
•
Connect one end of a short 18 AWG or larger gauge wire to the unpainted upper left
mounting hole (see
) and connect the other end to the system ground
reference or (if mounted in a vehicle) the vehicle chassis.
Note: In some routers the upper left mounting hole is painted. If you use the mounting screw and
washer included with your router, this mounting hole still provides an effective ground, as the
washer removes enough paint to allow contact between the wire and the metal chassis.
Step 3—Connect the Antennas
Warning:
This router is not intended for use close to the human body. Antennas should be at least
8 inches (20 cm) away from the operator.
The RV55 router has up to three female SMA antenna connectors. The number of
connectors depends on product variant:
•
Cellular Main antenna connector
•
Cellular Diversity antenna connector: Required for 4G/LTE networks
1
•
GPS antenna connector
1
In addition, the RV55 with Wi-Fi has two male SMA antenna connectors (see
For regulatory requirements concerning antennas, see
Note: The antenna should not exceed the maximum gain specified in
on page 59. In
more complex installations (such as those requiring long lengths of cable and/or multiple connec-
tions), you must follow the maximum dBi gain guidelines specified by the radio communications
regulations of the Federal Communications Commission (FCC), Industry Canada, or your country’s
regulatory body.
Note: Take extra care when attaching the antennas to the SMA connectors. Finger tight (approxi-
mately 0.6 – 0.8 Nm/5 – 7 in-lb.) is sufficient and the max torque should not go beyond 1.1 Nm
(10 in-lb.).
1. Not on LTE-M/NB-IoT variant