Brochure/Catalogue

VARITECTOR SSC 6AN
VARITECTOR SSC
Surge protection in a terminal
block: for measurement and
control systems
VARITECTOR SSC
Weidmüller's VARITECTOR SSC series
for surge protection (VSSC4 and
VSSC6) is well suited for protecting
measurement and control circuits. It
features good protective functionality
in a compact terminal-block design.
This is due to its 6.2 mm width. The
combined Torx
®
/ slotted screw ensures
that the proper nominal or max. torque
is applied to the connection. The
required screwdrivers are available
from Weidmüller under the following
order numbers:
4-mm slotted SD 0.8 x 4.0 x 100 (order
no. 9008340000) or T15 Torx
®
(order
no. 9009170000). The VSSC can be
snapped on, to directly earth it to the
DIN rail. The VSSC series is available
with four clamping yokes (VSSC4) and
six clamping yokes (VSSC6). The screw
terminal has a nominal torque of
0.5 Nm, but it can be tightened to
0.8 Nm. The VARITECTOR SSC series
is optimally designed for compact
installation locations in process
automation, industrial automation or
building automation.
The two-stage surge protection
terminals are equipped with gas
discharge tubes (GDT), suppressor
diodes (TVS) and decoupling
components. Individual protective
components (such as gas-lled spark
gaps, varistors and suppressor diodes)
supplement this product line. Our
VARITECTOR SSC surge protectors are
available for components with nominal
voltages of 12 V, 24 V, 48 V to 230 V.
Please contact us for other voltages or
special applications.
The two-stage surge protection
terminals are equipped with gas
discharge tubes (GDT), suppressor
diodes (TVS) and decoupling
components. Individual protective
components (such as gas-lled spark
gaps, varistors and suppressor diodes)
supplement this product line. Our
VARITECTOR SSC surge protectors are
available for components with nominal
voltages of 12 V, 24 V, 48 V to 230 V.
Please contact us for other voltages or
special applications. The PE contact
is established by snapping onto an
earthed DIN rail. The TS 35 must be
earthed in order to ensure safe power
discharging via the terminals of up to
20 kA (8/20 μs) and 2.5 kA
(10/350 μs).
The DIN rail must be
screwed onto the earthed mounting
plate to ensure EMC. The best
protection is achieved when a PE
contact is established every 60 cm
/ 24 inch using the terminal at the
VARITECTOR SSC terminals with direct
equipotential bonding. The cable should
correspond to the max. cross-section
of the VSSC connection. The four-port
VARITECTOR SSC terminal can be used
for binary and / or analogue signal
circuits. The six-port VARITECTOR SSC
can also be used to open signal circuits
via an isolated level and monitor them
using the optional built-in LED.
Overview of model types
VSSC4 CL
The VSSC4 CL is a two-stage
protective combination that has a
suppressor diode between the current
paths. This VSSC4 CL limits the surge
voltage in an analogue signal circuit
(e.g. a current loop).
The VSSC4 CL FG is a two-stage
protective combination that has a
suppressor diode between the current
paths. The gas discharge tube to
the PE provides a high-resistance
earthing for the protective circuitry.
Thus the current loop can be operated
with a oating ground. This VSSC4
CL FG limits the surge voltage in an
analogue unearthed signal circuit
(e.g. a current loop).
VSSC4 SL
The basic principle of a binary current circuit
The VSSC4 SL is a two-stage
protective combination with a
suppressor diode for each stage from
the current path to PE. This VSSC4 SL
limits the surge voltage in an earthed
binary signal (e.g. for alert contacts).
The VSSC4 SL FG is used for non-
earthed signal circuits.
VARITECTOR SSC4
VARITECTOR SSC6
B
B.66 2028840000
Lightning and surge protection for control and instrumentation signals