User's Manual

M7X and M7R Page 4-13 Installation
Back to Menu
Connect the Chassis Stud
A chassis stud is fitted to the radio's rear panel. This stud is used to connect the radio to the
equipment cabinet, or to the user's system earth point. The stud must not be used as the
safety earth.
In order not to compromise the radio’s Electromagnetic Compatibility (EMC) the chassis stud, marked
and fitted to the rear panel (see Fig 4-4 on page 4-6) must be connected to the equipment cabinet
(if a cabinet is being used) or to the user's system earth point. The connection should be made using a
single tri-rated, green-and-yellow cable having a cross-sectional area of 2.5 mm
2
. The cable should have
CSA and UL1015 approval, and be connected to the chassis stud through an M5 eyelet (for example,
Park Air part number 20-08010103).
Failure to comply with this instruction could result in non-compliance with the European
Commission EMC Directive 89/336/EEC.
Connecting the Input Supply
The M7 radio operates from a standard ac mains supply, or a low voltage dc supply; the specification for
the ac and dc supplies is given in topic 2 – Specification.
When both supplies are connected, operation from the ac supply takes priority; automatic change-over
to the dc supply occurs if the mains supply fails. On restoration of the ac supply, the equipment reverts
to ac operation.
WARNING Chassis Earth