VEGA 9130 User Manual
Operating Instruction
Safety barrier type 9130
1 2
Level and Pressure
160
9001/01-
086/150/10
3 4
out
in
1 Application and function
Operating instruction
Safety barrier type 9130 is a passive component. It converts a not-intrinsically safe circuit
without galvanic isolation into an intrinsically
safe circuit.
The term „intrinsically safe“ characterizes a
circuit in which the energy flow is limited and
capacitive as well as inductive energy storage
is saved such that neither switching commands nor shortcircuits can ignite an explosive mixture.
Safety barrier type 9130 takes over this function. It limits the energy flow, damps the capacitance C
output circuit and reduces the saved energy
and the inductance La of the
a
reliably. The saved circuits cannot ignite explosive mixtures.
Example:
An indicating instrument is mounted in Ex-area
and requires an intrinsically safe 0 … 20 mAcurrent signal.
The existing 0 … 20 mA-signal to the indicating instrument however is not intrinsically safe.
Safety barrier type 9130 is connected to the
signal line to supply the indicating instrument
in Ex-area with an intrinsically safe 20 mAsignal. The safety barrier then provides on its
output an intrinsically safe 0 … 20 mA-current
signal for the indicating instrument.
Note:
The capacitance C
output circuit out of the indicating instrument
and the supply line must not exceed the
stated limit values. The standard wiring is
normally within these values.
2 Technical data
General
Mounting place outside Ex-area on C-rail
Operating temperature -20°C … +40°C
Storage and transport temperature -40°C … +75°C
Cross-section area of conductor 1,5 mm
Protection
- terminals IP 20
- housing IP 40
Weight 100 g
Approvals PTB-no. Ex-91.C.2046 X
Classification [EEx ia] II C / [EEx ia] II B
2
(terminals)
and inductance La of the
a
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 Ω
min
73 Ω
max
≤ 1 µA
Output circuit
Short circuit current I
Capacitance C
Inductance L
Capacitance C
Inductance L
2 Safety barrier type 9130
K
at EEx ib IIC ≤ 7 µF
a
at EEx ia IIC ≤ 1,3 mH
a
at EEx ib IIB ≤ 70 µF
a
at EEx ib IIB ≤ 7 mH
a
≤ 128 mA
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