KROHNE M10 Converter H250-H 54 Ex II2G EN - Manual (Page 14)

Signal converter M10-EEx d – Supplementary instructions
11/2002
14
Physikalisch-Technische Bundesanstalt
PTB
Brunswick and Berlin
(13)
S c h e d u l e
(14)
EC Type Test Certificate PTB 01 ATEX 1154
(15) Device
description
The H…./…./M10-EEx variable-area flowmeter is designed to measure the volume rate of flow
of flammable and non-flammable gases and liquids in vertical pipe runs. The flow through the
measuring tube is from bottom to top, and the guided float adjusts so that lifting force, form
resistance and float weight are in equilibrium. Every vertical position of the float thus
corresponds to a specific flow rate. Electromagnetic position sensors in the display section
convert the position of the float into an appropriate electrical output signal.
Technical data
Supply (functional extra-low voltage PELV, U
DC
≤ 60 V)
Signal output 4 – 20 mA U
N
= 24 V DC + 30%, 2-wire connection with
(terminal I
+
, I
⊥
) HART communication
Signal output 1 & 2 NAMUR circuit
Output 1 (terminal B
+
, B
N
) U
N
= 8 V DC, depending on switch position ≤ 0.8 mA or
Output 2 (terminal B
+
, B
N
) ≥ 2.1 mA; R
i
= 1 k Ω
or
Output 1 (terminal B
+
, B
OC
) open collector (pnp output)
Output 2 (terminal B
+
, B
OC
) U
N
= 8 ... 30 V DC; I
i
≤ 100 mA;
U
I
with effectively conducting output ≤ 3 V
Status input U
N
= 8 … 30 V DC; I
i
≤ 1 mA
(terminal R
+
, R
⊥
)
Protection against ingress of
foreign bodies and water
IP 67 in conformity with EN 60529
(16) Test
report PTB Ex 01-11294
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