VEGA 9001 User Manual

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Operating Instructions

Safety barrier type 9001

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9001/01-

086/150/10

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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