Auteldac 6
16
Adapter cables are available for different types of approved headset.
Some types have 5 wires (including a drain wire), whilst others have
4 wires (without drain wire).
The headset adapter cable should lie
over
the terminal cover,
leaving enough cable inside the telephone to allow the front and rear
sections to be separated without straining the connection.
The headset interface of the Auteldac 6 has been certified as
intrinsically safe. Therefore, it is permissible to connect and
disconnect the headset from the socket on an adapter cable in a
hazardous area.
The headset connection (internal) is defined with the following
apparatus terminal parameters:
U
o
= 6.5V
I
o
= 0.097A
P
o
= 0.157W
C
i
= 0
L
i
= 0
The capacitance and either the inductance or inductance to
resistance ratio (L/R) of the load connected to the hazardous area
terminals for the headset must not exceed the following values:
Group
Capacitance
Inductance or L/R ratio
(µF)
(mH)
(µH/Ω)
IIC
25
3.78
225
IIB
570
15.1
902
IIA
1000
30.2
1804
The above load parameters apply where:
