Dräger Polytron 3000 Instructions For Use

9
Installing the transmitter
Installing the transmitter in areas subject to explosion hazards of zone 0 or
zone 1
●
Install a safety barrier with the appropriate explosion protection approval (catego-
ry 1, 2 or Div. 1) between the transmitter and the control unit.
— Only safety barriers with the following characteristics may be used: U
o
(V
oc
) ≤ 30
V, I
o
(Isc) ≤ 0.3 A, P
o
≤ 700 mW.
— Take care that the maximum permissible capacitance and inductance of connec-
tions to the safety barrier are not exceeded, also taking the cable into account.
The safety-related input parameters of the transmitter are: C
i
= 0 nF, Li = 50 μH.
Transmitter supply units
(without HART-communication between Ex/Non-Ex area)
The following safety barriers are provided as examples only. Selected barriers must
be acceptable to the authority having jurisdiction and comply with the assigned P3S
entity parameters also taking the cable into account.
— Connect shielding to earth point and/or 0 V (Ex i).
Installing the transmitters in explosion-hazard areas of zone 2 or 22, or in areas
not subject to explosion hazards
— Use only supply units of the device category 3.
— Take care that the maximum permissible capacitance and inductance of connec-
tions to the supply unit are not exceeded, also taking the cable into account.
The safety-related input parameters of the transmitter are:
C
i
= 0 nF, Li = 50 μH.
Manufacturer Type suitable for Line (Loop)
MTL MTL 5041 Zone 0, Div. 1 ≤ 190 Ω
Pepperl & Fuchs KFD2–STC4–Ex1 Zone 0, Div. 1 ≤ 140 Ω
KFD2–STC1–Ex1 Zone 0, Div. 1 ≤ 140 Ω
Steel
1)
1)
Only use the steel safety barrier as of a cable length of 100 m.
9160 / 13 – 11 – 11 Zone 0 ≤ 220 Ω
Caution:
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!
00433020_1_en.eps
Non-explosion-hazard areaExplosion-hazard area, zone 0, 1 or Div. 1
Safety barrier
Control unit
Ex i
PA
Earth point
4 ... 20 mA
0 V
+
–
+
4 to 20 mA
+24 V

Dräger Polytron 3000 Specifications

General

Brand	Dräger
Model	Polytron 3000
Category	Transmitter
Language	English