New Products

DEHNpipe
Surge arrester
Screwable SPDs
• Installation into the cable run ensures maximum
degree of protection
• Surges are discharged via the enclosure of the
field device
• For almost all types of two-wire field devices
with suitable cable gland
Surge arrester for outdoor use to be screwed onto two-wire field devices.
Stainless steel, installation with cable gland up to IP 67.
DEHNpipe is made of corrosion-resistant stainless steel and is screwed
onto the field device instead of a conventional cable gland. The permanently
connected lines are then connected to the terminals of the field
device. Thus the protective components are directly situated in the cable
run, allowing energy-coordinated surge protection. The arrester protects
the inside of the field device against dangerous overvoltage with the
interfering impulses being discharged via the metal enclosure only and
not via the inside of the field device. Earthing accessories are also available
for plastic field enclosures.
DPI types
DEHNpipe is designed for twowire
measuring sensors with
4-20 mA interfaces. The surge
arresters ensure energy-coordinated
surge protection for field
devices in outdoor areas, minimising
space requirements and
reducing installation work.
Installation benefits
The universal surge
arrester can also be used
for applications allowing
only single assignment
of the field device terminals
or providing space
for only one cable gland.
installation
1 2 3 4
tauten
the cable
BK cable (black)
RD cable (red)
transmitter
max. 10 Nm
removal
4 3 2 1
receiver
GNYE cable
(green/yellow)
GNYE
Installation of DPI MD 24 M 2S
Due to the two-part design of the arrester, the field cable can be connected
as usual, just as being connected to a measuring sensor.
Thanks to the cable gland, a degree of protection IP 67 is achieved.
DEHNpipe allows to implement conventional earthing concepts for cable
shields of field cables. Depending on the cable gland used, the cable
shield is either earthed directly or indirectly or is not earthed at all.
Indirect earthing integrates the shield into the protection concept – without
leakage pickups.
Installation of DPI ME 24 N A2G
This type for installation into pipes provides 1 / 2 -14 NPT male threads and
permanently installed lines. It is connected as shown in the above figure.
300 www.dehn.de