Brochure/Catalogue

MCZ OVP series
Narrow surge protection terminals with tension-clamp wire
connections for measurement and control systems
Weidmüller MCZ surge protection terminals are
characterised by their maximum protective function,
and a compact design of only 6 mm. The tension spring
connection and direct earthing via the terminal rail contact
results in time-savings during installation.
The MCZ OVP terminals are suitable for installing in the
tightest of places in automated process, industrial and
building services systems.
The three-stage surge protection terminals are tted with
gas discharge tubes, varistors, suppression diodes (TAZ) and
decoupling inductors. Individual protective components such
as varistors and suppression diodes complement the range.
The MCZ OVP surge protection terminals are available with
rated voltages of 24, 48, 115 and 230 V. The response
time for the 3-stage MCZ OVP is typically 100 ps. The earth
contact is produced by clipping the terminal to an earthed
terminal rail. To guarantee a safe energy discharge of up to
10 kA (8/20 µs) via these terminals, the TS 35 rail must be
earthed.
EMC regulations require the terminal rail to be securely
screwed to an earthed mounting plate. Optimum protection
is achieved when the PE contact is made via a tension spring
terminal every 600 mm.
The different models
MCZ OVP HF is a two-stage protective combination with
a bridge circuit consisting of suppressor diodes. With this
circuitry, high transmission rates of up to 100 Mhz can be
reached in 100 Ohm systems.
The protective circuitry is particularly suitable for protecting
high-speed data transmission systems and high-speed
analogue systems.
MCZ OVP CL is a three-stage protective combination with
a suppression diode between the current paths. It limits the
surge in analogue signal circuits, e.g. current loops.
MCZ OVP SL is a three-stage protective combination with
two suppression diodes, each from the signal line to earth. It
limits the surge in binary circuits, e.g. for actuators.
MCZ OVP CL FG is a three-stage protective combination
with a suppression diode between the current paths. It limits
the surge in analogue signal circuits. A high-resistance earth
connection is achieved with a gas discharge tube.
MCZ-OVP Filter-Terminals contain selected varistors,
capacitors and series inductances. They form reliable
noise lters. Coupled interference in the kHz range is safely
discharged to earth. For example, the signal inputs of a PLC,
which can be protected against interference voltages and RF
interference.
Attenuation chart MCZ OVP Filter
Hz
dB
50 Ohms Insertion loss
Differential Mode (symmetrical)
50
40
30
20
10
0
-10
10K 100K 1M 10M
100M
200M
B
B.110 2028840000
Lightning and surge protection for control and instrumentation signals