Dräger Polytron 7000 Instructions For Use Manual page 15

Installing the transmitter in areas subject to explosion hazards of
Zone 0 or Zone 1:
Only safety barriers with the following characteristics may be used:

≤24 V, I ≤0.38 A, P
U
max max
FISCO model ia or ib.
— The safety-related input parameters of the transmitter are as follows:
C = 5 nF, L = 10 µH.
i i
— The transmitter may only be connected in 2-wire connection to the left
4-fold terminal block (X7) of the docking station. No electrical connections
may be made to the right 4-fold terminal block (X8).
Installing the transmitter in areas subject to explosion hazards of
Zone 2:
— Make sure that the supply unit corresponds with the FISCO model ic and
that the maximum permissible capacitance and inductance of connections
to the supply unit are not exceeded, (also take the cable into account).
— The safety-related input parameters of the transmitter are:
C = 5 nF, L = 10 µH.
i i
— The transmitter may only be connected in 2-wire connection to the left
4-fold terminal block (X7) of the docking station. No electrical connections
may be made to the right 4-fold terminal block (X8).
The category 1 marking has to be cut out from the rating-plate label. Once
the unit has been used after installation in the above manner, it may never
be installed in explosion-hazard areas of Zone 0 or Zone 1 (device
category 1 or 2). Explosion hazard!
Connection to the control unit
Connect shield to earth of central unit (e.g. housing, earth bar, etc.).

In the case of PROFIBUS devices, the shield must only be connected on one
side of the cable to earth.
≤5.32 W or those which correspond to the
max
CAUTION
CAUTION
Electrical connections
15