Dräger P3U User Manual

Electrical connections
12
Installing the transmitter in areas subject to explosion hazards of zone 0, 1 or
Div. 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
(I
sc
) ≤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
= 5 nF, L
i
= 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 P3U
entity parameters also taking the cable into account.
SMART transmitter supply units
(with 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 P3U
entity parameters also taking the cable into account.
— The cable resistances given apply for a load resistance of 250 . Higher load re-
sistances can drastically reduce the permissible cable resistance!
● When other barriers have been selected, care must be taken that the voltages on
the transmitter do not fall below the following values when barrier parameters and
cable resistance are taken into account:
16.5 V for a current of 3 mA and 8.0 V for a current of 22 mA.
● If HART communication is to be used, the HART specifications must also be ob-
served.
Manufacturer Type suitable for R
Cable
(Loop) Note
MTL MTL 5041 Zone 0, Div. 1 350 Suitable only for 2-wire
Pepperl & Fuchs KFD2–CR–Ex1.30 200 Zone 0, Div. 1 400 Suitable only for 2-wire
Manufacturer Type suitable for R
Cable
(Loop) Note
Endress + Hauser RN 221 N–B1 (ATEX) Zone 0 380 Suitable only for 2-wire
RN 221 N–C1 (FM) Div. 1 380 Suitable only for 2-wire
RN 221 N–D1 (CSA) Div. 1 380 Suitable only for 2-wire
RN 221 N–E1 (TIIS) 380 Suitable only for 2-wire
MTL MTL 5042 Zone 0, Div. 1 400 Suitable for 2-wire and 3-wire
Pepperl & Fuchs KFD2–STC4–Ex1 Zone 0, Div. 1 300 Suitable for 2-wire and 3-wire
Stahl 9160/13–11–11 Zone 0 400 Suitable for 2-wire and 3-wire
(3-wire without HART)

Dräger P3U Specifications

General

Brand	Dräger
Model	P3U
Category	Transmitter
Language	English