Page 191 - Surge-Protection-E_0.pdf

Compact SPDs – DIN Rail Mounted

DEHNconnect SD2 Ex (i)
• Terminal block with integrated surge protection
– For protecting intrinsically safe measuring and control circuits
and bus systems (Ex (i))
– Maximum impulse current carrying capability Imax up to
20 kA (8/20 µs)
– Low voltage protection level, capable of protecting terminal
equipment
– Approvals: ATEX, IECEx
• Modular disconnection function
– Disconnection module for disconnecting the signal circuit for
maintenance work
– Module fixing and mechanical ejector
– Module in "parked" position after disconnection
• Space-saving and function-optimised design
– Terminal block with integrated surge protection (width of 6 mm)
– Fast conductor connection without tools thanks
to direct plug-in technology DIN Rail Mounted
– Can be used with jumper bar (accessory) Compact SPDs –

Arrester group for protecting intrinsically safe measuring circuits

The DIN rail mounted surge arresters of the DEHNconnect SD2 series are Conductors are connected via a vibration-proof spring-loaded connection
designed as space-saving terminal blocks with a width of 6 mm. These system. Stripped solid conductors and flexible conductors with wire end
terminal blocks with integrated surge protection have a modular discon- ferrule can be easily and quickly inserted into the relevant conductor ter-
nection function that allows them to disconnect the signal circuit for minal without tools. For rewiring, the conductor is removed from the
maintenance work. An integrated module ejector disconnects the signal clamping point and clamped into a new conductor terminal.
circuit from the terminal equipment. The disconnection module does not To reduce wiring, jumper bars can be inserted on the protected side of the
have to be removed, but remains in a "parked" position in the module surge arrester, thus quickly connecting signal circuits.
slot. The arresters are ideally suited for use in the process industry to protect
DEHNconnect SD2 Ex (i) is designed for intrinsically safe measuring and Ex (i) measuring circuits and interfaces for bus communication (e.g.
control circuits and bus systems and protects one unearthed pair (bal- Fieldbus Foundation or Profibus PA).
anced interface).

Disconnection module with ejector – Marking of the protected side – mini- Terminals with direct plug-in technol- Slots for jumper bars – for quickly
for disconnecting the signal circuits. mises wiring errors. ogy – fast and vibration-proof con- connecting signal circuits.
nection without tools.

DCO SD2 MD EX 917 960 DCO SD2 MD EX 24
Surge arrester with energy-coordinated low-capacitance protective circuit and disconnection module for disconnecting signal circuits.
For protecting one pair in intrinsically safe measuring circuits and bus systems, meets FISCO requirements. Self-capacitance and self-induct- 917 960 4013364150638 04 02 02 02 32 g
71,20 €
ance negligibly small. Insulation strength > 500 V to earth.
Type DCO SD2 MD EX 24
Part No. 917 960
SPD class T
Max. continuous operating voltage (d.c.) (UC) 33 V
Max. input current according to EN 60079-11 (Ii) 0.5 A
1 1‘
D1 Lightning impulse current (10/350 µs) per line (Iimp) 1 kA protected
C2 Total nominal discharge current (8/20 µs) (In) 10 kA 2 2‘
Cut-off frequency line-line (fG) 5.8 MHz
Approvals UL, CSA, EACEx, ATEX, IECEx, SIL

Valid as of August 1, 2020 You will find detailed product information on our website 187