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out
Operating Instructions
Safety barrier type 9001
1 2
160
9001/01-
086/150/10
3 4
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1 Application and function
Operating Instructions
Safety barrier type 9001 is a passive component. With galvanic separation, it converts a
non-intrinsically safe circuit into an intrinsically
safe circuit.
The term „intrinsically safe“ characterizes a
circuit in which the energy flow is limited and
stored capacitive and inductive energy is
secured in such a way that neither switching
operations nor nor short-circuits can ignite an
explosive mixture.
Safety barrier type 9001 takes over this function. It limits the energy flow, damps the capacitance Ca and the inductance La of the
output circuit and reduces the stored energy
reliably. Circuits secured in this way cannot
ignite explosive mixtures.
Example:
An indicating instrument is mounted in Exareas and requires an intrinsically safe
0 … 20 mA current signal.
The existing 0 … 20 mA signal to the indicating
instrument however, is not intrinsically safe.
Safety barrier type 9001 is connected to the
signal cable to supply the indicating instrument in Ex-area with an intrinsically safe 20 mA
signal. The safety barrier then provides on its
output an intrinsically safe 0 … 20 mA current
signal for the indicating instrument.
Note:
The capacitance Ca and inductance La of the
output circuit resulting from the indicating
instrument and the supply cable must not
exceed the stated limit values. The standard
wiring normally ensures these values.
2 Tec hnical data
General
Installation position outside Ex-area on carrier rail
Operating temperature -20°C … +60°C
Storage and transport temperature -20°C … +75°C
Housing material Polyamide 6 GF
Cross-section area of conductor 1.5 mm2 (terminals)
Protection acc. to IEC 60529
- terminals IP 20
- housing IP 40
Weight 115 g
Approvals
- zone 1 Ex II C 1/2G [EEx ia/ib] IIC/IIB
- zone 2 [EEx ia] II C / [EEx ia] II B
Ex II 3G EEx ia II T4
Input circuit
Nominal voltage U
Zener voltage 8.6 V
N
Min. series resistance R
Max. series resistance R
Leakage current against earth at U
N
6 V DC
64 Ohm
min
73 Ohm
max
≤ 1 µA
Output circuit
Short-circuit current I
Capacitance C
Inductance L
Capacitance C
Inductance L
2 Safety barrier type 9001
K
t EEx ia IIC ≤ 6.2 µF
a
at EEx ia IIC ≤ 1.3 mH
a
at EEx ib IIB ≤ 55 µF
a
at EEx ib IIB ≤ 7 mH
a
≤ 150 mA
29181-EN-040115
Operating Instructions
3 Dimensions
+
0
,2
1
2
,2
1
2
0
6
1
1
6
0
104
-1
9
0
0
1
1
-
/0
0
8
6
-
1
5
0
-
1
0
+
6
V
3
4
7
0
-
1
4 Mounting
• Mount the safety barrier onto a carrier rail
outside of the hazardous area
• Connect the potential equalisation cable
from the Ex-area to the projecting PA-terminal
• Connect the intrinsically safe circuit (blue)
correctly to the blue-coloured side of the
safety barrier. Note the polarity.
• Now connect the non-intrinsically safe circuit
correctly to the upper white-coloured side of
the safety barrier. Wrong polarity will destroy the safety barrier.
5 Electrical connection
Ex area
Non-Ex area
U
N
0 … 20 mA input
circuit (nonintrinsically safe)
Note:
Cables in Ex-areas must have a durable blue
marking along their entire length.
0 … 20 mA output
circuit (intrinsically
safe)
e.g. indicating instru-
29181-EN-040115
Safety barrier type 9001 3
ment
VEGA Grieshaber KG
Am Hohenstein 113
77761 Schiltach
Germany
Phone (07836) 50-0
Fax (07836) 50-201
E-Mail info@de.vega.com
www.vega.com
Safety information
Please read this manual carefully, and also take
note of country-specific installation standards
(e.g. the VDE regulations in Germany) as well
as all prevailing safety regulations and accident
prevention rules.
For safety and warranty reasons, any internal
work on the instruments, apart from that involved
in normal installation and electrical connection,
must be carried out only by qualified VEGA personnel.
ISO 9001
All statements concerning scope of delivery, application, practical
use and operating conditions of the sensors and processing systems correspond to the information available at the time of printing.
Technical data subject to alterations
29181-EN-040115
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