Brochure/Catalogue

VARITECTOR SSC EX
VARITECTOR SSC EX
12.4-mm-wide lightning and surge
protection for measurement and
control signals in the Ex zone
When used in intrinsically safe
circuits within Ex zones 2 to 0, the
VARITECTOR SSC can reliably protect
measurement and control signals from
lightning and surge voltages.
Lightning and surge voltages – coupled
from the eld side to machines and
facilities – can cause signal interference
or even destroy connected devices.
They could even lead to an explosion
within high-risk Ex-zone applications.
The new VARITECTOR SSC EX product
line, with a width of 12.4 mm, offers
protection against these risks. These
products comply with the new
IEC 61643-21:2008 standard.
They full the “over-stress mode”
described. They also meet the latest
ATEX standards, EN 60079. These
lightning and surge components are a
versatile and efcient solution because
they feature a direct PE contact,
extensive labelling and diagnostic
options, and easy separation of the
signal paths. The VARITECTOR SSC EX
takes advantage of these features so
that it can easily be used in place of a
transfer terminal.
Labelling of the VSSC EX
equipment
ATEX:
For gas
II 1 G Ex ia IIC T4…T6
For dust
II 1 D Ex ia IIIC T135 °C...T85 °C
DEKRA 11ATEX0023X
IEX EX:
For gas
Ex ia IIC T4...T6 Ga
For dust
Ex ia IIIC T135 °C...T85 °C Da
Basic health and safety functions are
fullled through compliance with:
IEC 61643-21, EN 60079-0,
EN 60079-1, EN 60079-26,
EN 61241-11;
The VSSC series comes in a light
blue housing and is used to protect
electronics connected to intrinsically
safe circuits. The VSSC has a negligible
internal inductance and capacitance.
Products for intrinsically safe
circuits
VSSC4 CL FG EX are used to protect
an intrinsically safe current loop.
VSSC4 SL FG EX are used to protect
intrinsically safe binary signal
circuits (such as alarm contacts).
VSSC4 GDT 24Vuc 20kA EX can
be used to provide high-resistance
earthing for shields
VSSC6 TR CL 24Vuc EX are used
to protect an intrinsically safe current
loop. Measurements can be taken in
the current loop by simply opening the
isolator. A test plug can be inserted in
the 2.3-mm test socket (built into the
head of the Torx
®
screws).
VSSC6 RS485 PA EX is used to
protect the intrinsically safe
PROFIBUS-DP.
General technical data
Storage temperature: -40 °C...+80 °C
Operating temperature: -40 °C...70 °C
Humidity: 5 %...96 % RH without
condensation
Material: V0, IP 20
Connection: VSSC4 and VSSC6
Torx
®
T15 900917
Slotted: 0.8 x 4 900834
Nominal torque: 0.5 Nm
Max. torque: 1 Nm
Stripping length: 10 mm
Solid core: 0.5...6 mm²
Finely stranded: 0.5...4 mm²
Finely stranded with ferrule:
0.5…4 mm²
Dimensions
VSSC4:
Width with frame: 12.4 mm
Height: 76 mm
Depth: 58.5 mm with TS 35 x 7.5
Top connections:
Unprotected: 1
Protected: 4
Bottom connections:
Unprotected: 2
Protected: 3
VSSC6:
Width with frame: 12,4 mm
Height: 88,5 mm
Depth: 81 mm mit TS 35 x 7,5
Top connections:
Unprotected: 1
Protected: 4
Mid-level connections:
Unprotected: 2
Protected: 5
Bottom connections:
Unprotected: 3
Protected: 6
Markers for VSSC4 and VSSC6:
Dekax: DEK6 for the connections
WS10/6 middle for the device markers
SNAPMARK only for the VSSC6
VARITECTOR SSC EX
B
B.154 2028840000
Lightning and surge protection for control and instrumentation signals