DEHNconnect SD2 Ex (i)

Terminal Block with integrated Surge Protection

Arrester group for protecting intrinsically safe measuring circuits
    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
  • Can be used with jumper bar (accessory)

Description

The surge arresters of the DEHNconnect SD2 series are designed as space-saving terminal blocks with a width of 6 mm. These terminal blocks with integrated surge protection have a modular disconnection function that allows them to disconnect the signal circuit for maintenance work. An integrated module ejector disconnects the signal circuit from the terminal equipment. The disconnection module does not have to be removed, but remains in a "parked" position in the module slot.

DEHNconnect SD2 Ex (i) is designed for intrinsically safe measuring and control circuits and bus systems and protects one unearthed pair (balanced interface).

Conductors are connected via a vibration-proof spring-loaded connection system. Stripped solid conductors and flexible conductors with wire end ferrule can be easily and quickly inserted into the relevant conductor terminal without tool. For rewiring, the conductor is removed from the clamping point and clamped into a new conductor terminal.

To reduce wiring, jumper bars can be inserted at the protected side of the surge arrester, thus quickly connecting signal circuits.

The arresters are ideally suited for use in the process industry to protect Ex (i) measuring circuits and interfaces for bus communication (e.g. Fieldbus Foundation or Profibus PA).

Detail 1

Disconnection module with ejector – for disconnecting the signal circuits.

Detail 2

Marking of the protected side – minimises wiring errors.

Detail 3

Terminals with direct plug-in technology – fast and vibration-proof connection without tools.

Detail 4

Slots for jumper bars – for quickly connecting signal circuits.

Models

DCO SD2 MD EX

DCO SD2 MD EX

Basic circuit diagram DCO SD2 MD EX 24Dimension drawingDCO 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-inductance negligibly small. Insulation strength > 500 V to earth.


Specifications

Type
Part No.
SPD class
Nominal voltage (UN)
Max. continuous operating voltage (d.c.) (UC)
Max. continuous operating voltage (a.c.) (UC)
Max. input voltage according to EN 60079-11 (Ui)
Max. input current according to EN 60079-11 (Ii)
Nominal current at 80 °C (IL)
D1 Lightning impulse current (10/350 µs) per line (Iimp)
C2 Total nominal discharge current (8/20 µs) (In)
C2 Nominal discharge current (8/20 µs) per line (In)
Voltage protection level line-line for In C2 (Up)
Voltage protection level line-PG for In C2 (Up)
Voltage protection level line-line at 1 kV/µs C3 (Up)
Voltage protection level line-PG at 1 kV/µs C3 (UP)
Series resistance per line
Cut-off frequency line-line (fG)
Capacitance line-line (C)
Capacitance line-PG (C)
Operating temperature range
Degree of protection
For mounting on
Connection (input / output)
Cross-sectional area (solid)
Cross-sectional area (flexible)
Earthing via
Enclosure material
Colour
Test standards
Approvals
SIL classification
ATEX approvals
IECEx approvals
Extended technical data:
– Max. discharge current (8/20 µs) [1/2 - PG], [1+2 - PG] (Imax)
– Voltage protection level line-PG at 1 kV/μs C3 after being subjected to Imax (Up)
Weight
GTIN
PU
Part No.
*) For more detailed information, please visit www.dehn-international.com.
  • DCO SD2 MD EX 24
  • 917 960
  • T
  • 24 V
  • 33 V
  • 23 V
  • 30 V
  • 0.5 A
  • 0.5 A
  • 1 kA
  • 10 kA
  • 5 kA
  • ≤ 50 V
  • ≤ 1500 V
  • ≤ 45 V
  • ≤ 1400 V
  • 1.8 ohms
  • 5.8 MHz
  • ≤ 1.0 nF
  • ≤ 8 pF
  • -40 °C ... +80 °C
  • IP 00
  • 35 mm DIN rails acc. to EN 60715
  • spring / spring
  • 0.34-2.5 mm2
  • 0.34-2.5 mm2
  • DIN rail / terminal
  • polyamide PA 6.6
  • blue
  • IEC 61643-21 / EN 61643-21
  • UL, CSA, EACEx, ATEX, IECEx, SIL
  • up to SIL3 *)
  • DEKRA 12ATEX0261 X: II 2(1) G Ex ia [ia Ga] IIC T4,T5,T6 Gb
  • DEK 12.0076X: Ex ia [ia Ga] IIC T4...T6 Gb
  • - - - - - - - - - - - - - - - - - - - -
  • 20 kA
  • ≤ 1400 V
  • 32 g
  • 4013364150638
  • 1 pc(s)
  • 917 960
  • Specifications (PDF)
  • More

Accessories

Signal Disconnect Disconnection Module

Disconnection module (replacement) to be inserted in DCO SD2 for disconnecting the signal in the system circuit.

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Specifications

Type
Part No.
Width
Weight
GTIN
PU
  • DCO SD2
  • 917 900
  • 6 mm
  • 3 g
  • 4013364150676
  • 5 pc(s)
  • Specifications (PDF)
  • More
    • Further Pictures
      open PDF
      Further Information
      Product Specifications (Text)

      Back

      DCO SD2 disconnection module for signal 
      disconnection in the system circuit
      Plug-in module for insertion
      into terminal blocks with
      integrated surge protection of 
      the DEHNconnect DCO SD2 
      series for signal disconnection in
      the system circuit

      delivery and installation.

      Brand: DEHN + SÖHNE
      Type: DCO SD2
      Part No.: 917 900

      or equivalent.
      Installation Instructions

Jumper Bar

Multipole jumper bar for DCO SD2 terminal blocks with integrated surge protection.

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Specifications

Type
Part No.
Poles
Weight
GTIN
PU
  • KB 10 DCO RK
  • 919 880
  • 10
  • 5 g
  • 4013364095090
  • 25 pc(s)
  • Specifications (PDF)
  • More
    • Further Pictures
      Further Information
      Product Specifications (Text)

      Back

      KB 10 DCO RK jumper bar
      Jumper bar for DEHNconnect RK, 10 poles

      delivery and installation.

      Brand: DEHN + SÖHNE
      Type: KB 10 DCO RK
      Part No.: 919 880

      or equivalent.

Quick Labelling System, horizontal Imprint

Plate with 2x plate numbers from 1 to 50 for DCO SD2, horizontal imprint

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Specifications

Type
Part No.
Material
Weight
GTIN
PU
  • LS 1 50 H DCO
  • 917 977
  • plastic
  • 9 g
  • 4013364151536
  • 1 pc(s)
  • Specifications (PDF)
  • More
    • Further Pictures
      Further Information
      Product Specifications (Text)

      Back

      LS 1 50 H DCO quick labelling system, horizontal imprint
      Quick labelling system for DEHNconnect SD2,
      horizontally printed 

      delivery and installation.

      Brand: DEHN + SÖHNE
      Type: LS 1 50 H DCO
      Part No.: 917 977

      or equivalent.