10
Use in hazardous areas
The Type 3430 Controller Station is suitable
for use in potentially explosive atmospheres
in Zones 1 and 2, even though it does not
have its own EC-type examination certifi-
cate. The controller station does not require
an EC-type examination certificate accord-
ing to 94/9/EC (ATEX).
Conditions for
use in hazardous areas:
4
The controller station is not marked as an
explosion-protected device with the cor-
responding approval mark.
4
All installed explosion-protected modules
possess their own EC-type examination
certificate.
4
The maximum values specified in the as-
sociated EC-type examination certificate
apply to the connection to intrinsically
safe circuits.
4
The installation, wiring, terminals, cable
entry and other components relevant for
explosion protection comply with
DIN EN 50014, DIN EN 50020 and
DIN EN 60079-14 (VDE 0615).
4
The transparent door or window of the
controller station has a conductive
coating to prevent electrostatic charging.
4
The measuring circuit of the transmitter
model TTH200-E1H has a protection
level corresponding to “ia” and can be
connected to sensors which are routed
into Zone 0. The transmitter itself must
be installed in areas of Zone 1 or
Zone 2.
Caution!
Observe the following for installations in po-
tentially explosive atmospheres: On install-
ing and performing service work on the de-
vice, ensure that no electrostatic charging
can arise due to the high surface resistivity
(R
insul.
= 10
12
ohm).
10.1 Servicing explosion-protected
devices
If a part of the apparatus on which the ex-
plosion protection is based needs to be ser-
viced, it must not be put back into operation
until an expert has inspected the device ac-
cording to explosion protection require-
ments, has issued a certificate stating this or
given the device a mark of conformity.
Inspection by an expert is not required if the
manufacturer performs a routine check on
the device prior to putting it back into oper-
ation. The passing of the routine check must
be documented by attaching a mark of con-
formity to the device.
Explosion-protected components may only
be replaced by original, checked compo-
nents from the manufacturer.
Devices that have already been used outside
of hazardous areas and are intended for
use in hazardous areas in future must com-
ply with the safety demands placed on re-
paired devices. Prior to operation, they must
be tested according to the specifications stip-
ulated for "Repairing explosion-protected
devices".
EB 7030 EN
31
Use in hazardous areas
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