VEGA UES-F-LB-I-G User Manual

Overvoltage suppressor (lightning­protection barrier)

20 mm ISO thread

• 2-wire protection

• For insulated C&I circuits

• Fulfills requirements to 500 V
insulation to earth, housing
components and other intrinsically
safe circuits

• Installation directly in the hazardous
area for protecting the field devices

• Discharge current 10 kA

• Simple installation in the free cable
gland on the field device

• Uninterruptable operation (auto
reset)

(red)

GND (green/yellow)

(black)

FS-LB-I

Function

By using an F*-LB-I, field devices and
control interface units are safely
protected from voltage surges due to
e. g. flash of lightning, switching
processes etc.).
This is accomplished by the derivation
of the higher current to ground and a
voltage limit during the high level pulse.
The continuous current capacity of the
circuit that is to be protected must not
exceed the rated operational current.

Composition

098916_ENG.xml 2003-03-24

Subject to reasonable modifications due to technical advances. Copyright Pepperl+Fuchs, Printed in Germany

1

Pepperl+Fuchs Group • Tel.: Germany [phone] • USA [phone] • Singapore [phone] • Internet http://www.pepperl-fuchs.com

Technical Data

Supply

Rated voltage ≤ 48 V
Rated current ≤ 250 mA
Leakage current ≤ 5 µA
On-state voltage ≤ 85 V
Ground insulation ≥ 500 V breakdown voltage

Ambient conditions

Ambient temperature -30 ... 60 °C (243 ... 333 K) for Ex application; please observe declaration of conformity

Mechanical specifications

Housing material stainless steel 1.4401 (AISI 316)

Protection degree IP20

Data for application in conjunction
with hazardous areas

EC-Type Examination Certificate PTB 00 ATEX 2175 , conformity information is to consider

Group, category, type of protection,
Temperature classification

Voltage U

50 V

i

Type of protection [EEx ia and EEx ib]

Internal capacitance (EEx ia) negligibly small

Internal inductance (EEx ia) negligibly small
Nominal leakage current 10 kA (8/20 µs) per core according to IEC 60-2
Nominal response time

Symmetrical 1 ns

Asymmetric 100 ns
Bandwidth ≥ 40 kHz

surface all over polished

¬ II 2 G EEx ia IIC T6

FS-LB-I

Notes

Surge protectors must always be connected to a solid ground (large cross sections, short wiring). This is the basic requirement

for an effective protection.

Examples:

Terminal box

22

GND

Length 400 mm
Cross sectional area 1.0 mm

M20 x 1.5 or
PG13.5 or ½" NPT

55

Transmitter

22

F*-LB-I

F*-LB-I

098916_ENG.xml 2003-03-24

Subject to reasonable modifications due to technical advances. Copyright Pepperl+Fuchs, Printed in Germany

Pepperl+Fuchs Group • Tel.: Germany [phone] • USA [phone] • Singapore [phone] • Internet http://www.pepperl-fuchs.com

2