User's Manual

M7X and M7R Page 4-15 Installation
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Connecting the ac Input Supply
A mains isolating switch should be fitted close to, and easily accessible from, the radio's
position. The isolation switch should isolate both live and neutral supplies, be clearly
labelled, and adequately rated to protect the equipment.
This equipment must be earthed. The earth terminal of the ac connector should be used as
the safety earth.
An ac input IEC connector is fitted to the equipment’s rear panel as shown in Fig 4-4 on page 4-6. The
connector’s pin-out is shown in Fig 4-10.
Fig 4-10 ac Connector Pin-out
The cable used to connect between the equipment and the user’s ac power source should be 3-core (to
IEC 227) rated 250 Vac at 8 amps, and have a minimum cross-sectional area of 1.0 mm
2
per core.
Park Air recommends the use of polyvinyl chloride (PVC) insulated cable. The cable must be fitted with
the IEC approved equipment connector and conform to the following specification:
 If PVC insulated, be not lighter than ordinary polyvinyl chloride sheathed flexible cord according
to IEC publication 227 (designation H05 VV-F, or H05 VVH2-F).
 If rubber insulated, be of synthetic rubber and not lighter than ordinary tough rubber-sheathed
flexible cord according to IEC publication 245 titled ‘Rubber Insulated Cables of Rated Voltage up
to and Including 450/750 V’ (designation H05 RR-F).
M7 radios are Class 1 equipment. The ac supply cable should have a green-and-yellow protective
earthing conductor electrically connected to the protective earthing terminal of the equipment connector
and the mains plug. Park Air recommends the ac supply cable is colour coded in accordance with the
electrical appliance (colour code) regulations for the UK. That is:
 The core coloured green-and-yellow must be connected to the terminal in the plug that is marked
with the letter E or by the earth symbol or coloured green-and-yellow.
 The core coloured blue must be connected to the terminal that is marked with the letter N.
 The core coloured brown must be connected to the terminal that is marked with the letter L.
WARNING Dangerous Voltage
WARNING Earth Connection
Live
(L)
Neutral
(N)
Earth
(E)
Viewed looking at radio’s rear panel