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Promass 63
PROMASS 63 with "EEx i", PROFIBUS-PA
(Promass 63****-**********H)
Functional values
3
Ground connection (protective earth)
–
1
L1
for AC power supply
N
2
Voltage:
Power consumption:
—
22
Current output
23
—
26
PROFIBUS PA (FISCO model)
The transmitter guarantees galvanic isolation up to
27
max. 260 V AC between the fieldbus current loop and
each other current loop.
(for an explanation of the FISCO model, see below)
28
Ground connection (signal cable shield)
Explanation of the FISCO model (PROFIBUS PA)
The FISCO model makes possible the interconnection of intrinsically safe apparatus
and intrinsically safe associated apparatus, without having to have separate
certification for respective connections.
The criteria for the intrinsic safety of an interconnection (bus segment) is given under
the following interrelationships:
• U
of the field device is ≥ U
, I
and P
i
i
i
(segment coupler).
• C
of the field device is ≤ 5 nF and 10 µH.
and L
i
i
• There is only one source within an interconnection (bus segment). This source is
normally the associated equipment (segment coupler).
• Every field device takes a constant nominal current (approx. 12 mA) and behaves
as a passive current sink. When the field device transmits, no power is fed into that
bus segment.
• Independently powered devices (four-core device) must ensure galvanic isolation
from the bus segment.
Endress+Hauser
L+
for DC power supply
L–
AC 85...260 V
U
max
AC 20...55 V
DC 16...62 V
15 VA / 15 W
active
Output circuit 4...20 mA in EEx ia
0/4...20 mA
Maximum values:
< 350 Ω
R
L
Maximum inductance or maximum capacitance
are in the table below:
Maximum values for mixed interconnections are
in the table below:
Connection of an intrinsically safe current circuit
of the categorie "ia" oder "ib":
Maximum values:
Internal capacitance
Internal inductance
Leakage current
For multiple grounding of the shield, see Fig. 4
on page 11
, I
and P
of the associated equipment
o
o
o
Safety values
= 260 V
U
=
21.8 V
O
I
=
60 mA
O
P
=
320 mW
O
IIC
L
/ mH
10
o
C
/ nF
150
800
o
IIC
L
/ mH
5
o
C
/ nF
80
300
o
U
=
30 V
i
Ii
=
500 mA
P
=
5.5 W
i
≤
C
5 nF
i
Li ≤
10 µH
≤
50 µA
–
—
IP40 cover
L1/L+
IIB
N/L-
40
IIB
25
PA +
PA –
Warning!
Warning!
In the version with intrinsi-
cally safe outputs, an addi-
tional IP 40 cover is used
for the power supply termi-
nals in the wiring compart-
ment.
Do not open the IP 40
cover while circuits are
alive!
In the combination "EEx de
wiring compartment" and
"intrinsically safe outputs",
connection and disconnec-
tion of intrinsically safe
wiring (terminals 22/23 and
26/27), and measurements
with certified measuring
devices are also permitted
during operation.
en
–
Power
supply
cable
—
PROFIBUS-PA
cable / output
circuit cable
9
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