Eaton ExResistTel, Руководство по эксплуатации

Страница: 46 / 105

11
Intrinsically safe terminals:
Protruding from the compound (see connecting diagram on page 16),
a 12-pole intrinsically safe terminal row is intended for connecting the
receiver, which is permanently connected with the telephone housing,
terminals 1 to 4, as well as the intrinsically safe accessories, terminals 5
to 10.
The terminals 7 and 8 are intended for the connection of dynamic
receiver insets, like the ones used in second earpieces and headsets.
This output thus can be used for connecting a second earpiece or a
headset, which means that a second earpiece and a headset cannot be
connected simultaneously.
Terminal Note Use
1 Dynamic receiver inset connection 1
Receiver inset
2 Dynamic receiver inset connection 2
3 Electret-foil microphone connection (+)
Receiver
microphone
4 Electret-foil microphone connection (-)
5 Electret-foil microphone connection (+)
Headset
Microphone, not for
ZB version
6 Electret-foil microphone connection (-)
7 Dynamic receiver inset connection 1 Headset or
second earpiece
8 Dynamic receiver inset connection 2
9
Jumper between the terminals 9 and 10
is identified by the telephone as
headset connected. Headset
10
To connect accessories, you must replace the blind plugs screwed into
the telephone housing by explosion-proof cable glands (M20x1.5).
Before connecting intrinsically safe accessories, and if a system
certificate for the intended connection does not exist, the constructor
should perform an evaluation of the intrinsic safety according to
EN 60079-25.
The technical data for the evaluation of the intrinsic safety can be found
in the chapter “Characteristic data”.
Further information see EN 60079-14.
A metal bracket is supplied for hanging up the intrinsically safe second
earpiece or headset. The metal bracket should be attached to the
telephone by means of the two threaded bushes in the floor of the
telephone housing. The corresponding bores in the metal bracket can