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Copyright © 2020 RCA Communications Systems
www.RCACommunicationsSystems.com
Communications Systems
BRM350D Digital Mobile
Two-Way Radio
INSTRUCTION MANUAL
Transceiver Installation:
Tools Needed:
• Electric Drill with 6mm bit or above
• Philips Head Screwdriver
• Hex Socket Sleeve (used for mounting 5mm X 16mm self-tapping
screw)
When installing your transceiver, be sure to select a safe, convenient
location. If you’re installing inside your vehicle, choose a location that
minimizes danger to your passengers and yourself while the vehicle is in
motion. Consider installing the unit so that knees or legs will not strike the
unit during vehicle operation. Try to pick a well ventilated location that is
shielded from direct sunlight for your installation location.
Install the mounting bracket in the vehicle using the supplied self-tapping
screws (4), flat washers (4), and spring washers (4). Position the bracket so
that the 3 long screw hole positions on the side of the mounting bracket are
towards the rear of the bracket. (Figure 1)
Self-tapping screw
(5mm x 16mm)
Spring washer
Flat washer
Figure 1
Mounting Bracket
Use the 3 screw positions on the
side of the mounting bracket to
determine the appropriate angle of
the transceiver. (Figure 2)
Figure 2
Position the transceiver, then insert and tighten the supplied hexagon SEMS
screws (4) and flat washers (4). (Figure 3) Double check that all hardware is
securely fastened to ensure that vehicle vibration will not loosen the bracket
or transceiver.
SEMS Screws
Figure 3
(Radio back)
DC Power Cable Connection
Mobile Operation
Your vehicle battery must have a nominal rating of 12V. Never connect the
transceiver to a 24V battery. Be sure to use a 12V vehicle battery that has
sufficient current capacity. If the current to the transceiver Is insufficient, the
display may darken during transmission, or transmit output power may drop
excessively.
1. Route the DC power cable supplied with the transceiver directly to the
vehicle’s battery terminals using the shortest path from the transceiver.
If using a noise filter, it should be installed with an insulator to prevent
it from touching metal on the vehicle. We recommend you do not use
the power outlet/cigarette lighter socket as some power outlets have
an unacceptable voltage drop. The entire length of the cable must be
dressed so it is isolated from heat, moisture and the engine secondary
(high voltage) ignition system/cables.
2. After the cable Is In place, wrap heat-resistant tape around all fuse
holders to protect it from moisture and tie down the full run of cable.
3. To prevent the risk of short circuiting, disconnect other wiring from the
negative (-) battery terminal before connecting the transceiver.
4. Confirm the correct polarity of the connections, then attach the power
cable to the battery terminals; red connects to the positive (+) terminal
and black connects to the negative (-) terminal. Use the full length of the
supplied cable without cutting off excess even If the cable is longer than
required. In particular, never remove the fuse holders from the cable.
(Figure 4)
Figure 4
Fuse holders
5. Reconnect any wiring removed from the negative terminal.
6. Connect the DC power cable to the transceiver’s power supply connector.
Press the connectors firmly together until the locking tab connectors
firmly together until the locking tab clicks. (Figure 5)
Figure 5
Supplied
cable
Fuse
holder
