5
Power Connections
- Power is wired to the intercom using the power supply cable
with in-line fuse (included). When routing the power cable, the in-line fuse should
be easy to access.
Warning - Before making power connections, make sure the power source is
turned off.
Important - Use a dedicated ground for the (-) power connection. Do not ground
to the chassis.
Important - We recommend connecting the intercom power to the same power
busses as the 2-way radio.
CA Cable Routing - There are several important considerations when routing the CA
cable:
• Do not bundle extra cable. The cable should be cut to length at installation,
especially when radios are used.
• Do not route or bundle CA cables with coax cable from the 2 way radios.
• Route CA cables away from hot surfaces including vehicle exhaust systems.
• When routing CA cables through bulkheads or other sheet metal, use a
grommet in the hole to prevent damage to the cable.
• A radio transmit priority “PR” port is identified on the front of the intercom.
When a radio is connected to the system, the intercom user on this port
will have priority when transmitting over the radio. Other users will not be
able to transmit over the radio while this user is transmitting.
Radio Connections
- A mobile radio may be connected to the intercom by using the
radio port on the back of the unit. A MR interface cable, with an un-terminated end,
is supplied with the intercom. For independent wire descriptions, see Appendix A.
Warning - To ensure proper operation, the connection to the radio should be per-
formed by a qualified radio technician.
Some radio specific interface cables are available for common model radios. For a
list of interface cables, please visit www.soneticscorp.com and click on the Product
Support section of our web site or contact our service department at 800-527-0555.
When installing an MR cable, tighten the two screws on the plug of the cable.
Warning - If the screws are not properly tightened, the 9-pin plug may vibrate and
cause problems with transmission, reception, or other radio functionality.
12
Appendix A - Wiring Diagrams
CA Cable
Mobile Radio Interface Cable
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