Proline Promass 83 FOUNDATION Fieldbus
4 Wiring
Hauser
25
4
Wiring
#
Warning!
When connecting Ex-certified devices, see the notes and diagrams in the Ex-specific supplement to
these Operating Instructions. Please do not hesitate to contact your Hauser representative
if you have any questions.
4.1
Cable specifications for fieldbus
Cable type
Twin-core cable is recommended for connecting the flowmeter to the FOUNDATION Fieldbus H1.
By analogy with IEC 61158-2 (MBP) protocol four different cable types (A, B, C, D) can be used
with the FOUNDATION Fieldbus Protocol, only two of which (cable types A and B) are shielded.
• Cable types A or B are particularly preferable for new installations. Only these types have cable
shielding that guarantees adequate protection from electromagnetic interference and thus the
most reliable data transfer. With cable type B more than one fieldbus (with the same degree of
protection) may be operated in a cable. No other circuits are permissible in the same cable.
• Practical experience has shown that cable types C and D should not be used due to the lack of
shielding, since the freedom from interference generally does not meet the requirements descri-
bed in the standard.
The electrical data of the fieldbus cable has not been specified but determines important characte-
ristics of the design of the fieldbus, such as distances bridged, number of participants, electromagne-
tic compatibility, etc.
Suitable fieldbus cables (Type A) from various manufacturers for the hazardous area are listed below:
• Siemens: 6XV1 830-5BH10
• Belden: 3076F
• Kerpen: CeL-PE/OSCR/PVC/FRLA FB-02YS(ST)YFL
Type A
Type B
Cable structure
twisted pair,
shielded
one or more twisted pairs, fully shielded
Wire size
0.8 mm
2
(AWG 18)
0.32 mm
2
(AWG 22)
Loop resistance
(DC)
44
Ω
/km
112
Ω
/km
Impedance at 31.25 kHz
100
Ω
± 20%
100
Ω
± 30%
Attenuation
at 39 kHz
3 dB/km
5 dB/km
Capacitive asymmetry
2 nF/km
2 nF/km
Envelope delay distortion (7.9
through 39 kHz)
1.7
µ
s/km
*
Shield coverage
90%
*
Max. cable length (inc. spurs
>1 m)
1900 m
1200 m
* not specified
Содержание Proline Promass 83
Страница 24: ...3 Installation Proline Promass 83 FOUNDATION Fieldbus 24 Endress Hauser ...
Страница 34: ...4 Wiring Proline Promass 83 FOUNDATION Fieldbus 34 Endress Hauser ...
Страница 64: ...6 Commissioning Proline Promass 83 FOUNDATION Fieldbus 64 Endress Hauser ...
Страница 66: ...7 Maintenance Proline Promass 83 FOUNDATION Fieldbus 66 Endress Hauser ...
Страница 90: ...9 Trouble shooting Proline Promass 83 FOUNDATION Fieldbus 90 Endress Hauser ...
Страница 116: ...Index Proline Promass 83 FOUNDATION Fieldbus 116 Endress Hauser ...
Страница 118: ...www endress com worldwide BA065D 06 en 12 04 50098623 FM SGML 6 0 ...