Brochure/Catalogue
VARITECTOR SSC 6AN
The VSSC6 GDT provides one-stage
protection with two gas discharge
tubes (GDT) between the current paths
and common return wire. This VSSC6
GDT limits the surge voltage in two
binary signal circuits.
The VSSC6 TR LD GDT provides
two-stage protection with two gas
discharge tubes (GDT) between the
current paths and common return
wire. The VSSC6 GDT limits the surge
voltage in two binary signal circuits
and also has an isolator for each signal
circuit.
The VSSC6 TAZ provides one-stage
protection with two suppressor diodes
(TAZ) between the current paths and
common return wire. The VSSC6
TAZ limits the surge voltage in two
binary signal circuits and also has
an isolator and an LED for each signal
circuit.
The VSSC6 TR LD TAZ provides one-
stage protection with two suppressor
diodes (TAZ) between the current
paths and common return wire. The
VSSC6 TAZ limits the surge voltage in
two binary signal circuits and also
has an isolator and an LED for each
signal circuit.
VSSC6 RS422/485
The VSSC6 RS485 is a two-stage
protective combination that has
suppressor diodes between the current
paths. This VSSC6 RS485 limits the
surge voltage in two high-frequency
signal circuits with common return
wires. The VSSC RS485 is available in
the PROFIBUS PA and DP variants.
VSSC6 RS232
The VSSC6 RS232 is a two-stage
protective combination that has
suppressor diodes between the current
paths. This VSSC6 RS232 limits the
surge voltage in a signal circuit.
Black Material PA6.6 with UL94 V0 is
used for the VSSC4 and VSSC6 series
so that they are suitable for use in
many applications. They are suitable for
use in temperatures ranging from
-40 to +70 °C.
Discharge capacity
Tested in compliance with standard
IEC 61643-21 for providing surge
protection in signalling networks with
voltage and current pulses. The VSSC
series has been tested to comply with
IEC 61643-21 and EN 61643-21.
Modules were tested with categories
C1, C2 and C3: with quick-rising edges
with up to 300 pulses. Category D1
describes high-power testing
(10/350 μs), so that the VSSC series
can be used in compliance with IEC
62305-4. The VSSC is colour-coded so
that it is easy to detect the voltage level
(or the signal location SL or CL).
Colour coding
Voltage level Colour
≤ 12 V green
24 V Binary blue
24 V Analogue yellow
48 V red
≥ 60 V violet
Special function white
Installation
The VSSC series is used to protect
signal circuits. In order to achieve
a complete protective strategy for
the facility, the power feed must be
protected with Type II surge protection
(for example, by using the
VPU II series).
For existing lightning protection
facilities, Type I protection must be
used (for example, by using the VPU I
series). Type II protection (for example,
the VPU II) is sufcient when there is
no lightning protection facility.
Fusing
The VSPC surge protection modules are
designed so that they are decoupled
between the individual protective
stages. When relying on an external
fuse, make sure to maintain the
following:
• Maximum nominal current
• Derating curve
• Type of installation
• Application
Category
IEC 61643-21
C1, C2, C3, D1
B
B.68 2028840000
Lightning and surge protection
for control and instrumentation signals