2803865
Official DistributorSKU
PHX2803865
This product is Not Cancellable/Not Returnable
Surge protection device - TT-EX(I)-M-24DC
Terminal block with two-stage surge protection for a floating Ex-i signal circuit, disconnect knife on both signal paths, separate PE connection, nominal voltage: 24 V DC
- Versions with and without disconnect knife
- To terminate a row of TERMITRAB TT... devices, covers are available in the corresponding colors
- Other voltage levels available on request
- Multi-stage modular terminal blocks with screw connection technology
- Protection of a floating double wire in intrinsically safe circuits
- Use in Ex protection zones 1 and 2
- Conductors can be led up to Ex protection zone 0
- Disconnection of signal circuits by disconnect knife
Technical Specifications
Dimensions
| Height | 94.8 mm |
| Width | 6.2 mm |
| Depth | 69.1 mm |
Ambient conditions
| Ambient Temperature (Operation) | -40 °C ... 80 °C |
| Altitude | ≤ 2000 m (amsl (above mean sea level)) |
| Degree of Protection | IP20 (with end cover) |
General
| Housing Material | PA 6.6 |
| Flammability rating according to UL 94 | V-0 |
| Color | sky blue RAL 5015 |
| Mounting Type | DIN rail: 35 mm |
| Type | Double-level terminal block with PE foot – separate PE connection |
| Number of Positions | 2 |
| Direction of action | Line-Line & Line-Earth Ground |
Protective circuit
| IEC test classification | C1 |
| IEC test classification | C2 |
| IEC test classification | C3 |
| IEC test classification | D1 |
| Nominal voltage UN | 24 V DC |
| Maximum continuous voltage UC | 30 V DC |
| Maximum continuous voltage UC | 21 V AC |
| Rated current | 250 mA (40 °C) |
| Operating effective current IC at UC | ≤ 5 µA |
| Residual current IPE | ≤ 1 µA |
| Nominal discharge current In (8/20) µs (line-line) | 5 kA |
| Nominal discharge current In (8/20) µs (line-earth) | 5 kA |
| Pulse discharge current Iimp (10/350) µs (line-earth) | 500 A |
| Total discharge current Itotal (8/20) µs | 10 kA |
| Nominal pulse current Ian (10/1000) µs (line-line) | 100 A |
| Nominal pulse current Ian (10/1000) µs (line-earth) | 100 A |
| Output voltage limitation at 1 kV/µs (line-line) spike | ≤ 44 V |
| Output voltage limitation at 1 kV/µs (line-earth) spike | ≤ 1.5 kV |
| Output voltage limitation at 1 kV/µs (line-line) static | ≤ 44 V |
| Output voltage limitation at 1 kV/µs (line-earth) static | ≤ 1.5 kV |
| Residual voltage at In (line-line) | ≤ 40 V |
| Residual voltage at In (line-earth) | ≤ 110 V |
| Voltage protection level Up (line-line) | ≤ 70 V (C2 - 10 kV / 5 kA) |
| Voltage protection level Up (line-earth) | ≤ 1.5 kV (C2 - 10 kV / 5 kA) |
| Response time tA (line-line) | ≤ 1 ns |
| Response time tA (line-earth) | ≤ 100 ns |
| Input attenuation aE, sym. | typ. 1 dB (≤ 1 MHz / 50 Ω) |
| Input attenuation aE, sym. | typ. 0.3 dB (≤ 200 kHz / 150 Ω) |
| Cut-off frequency fg (3 dB), sym. in 50 Ω system | typ. 6 MHz |
| Cut-off frequency fg (3 dB), sym. in 150 Ω system | typ. 2 MHz |
| Resistance per path | 4.7 Ω ±20 % |
| Surge protection fault message | none |
| Max. required back-up fuse | 250 mA |
| Impulse durability (line-line) | C2 - 10 kV / 5 kA |
| Impulse durability (line-earth) | C2 - 10 kV / 5 kA |
| Impulse durability (line-earth) | D1 - 500 A |
Connection data
| Connection Method | Screw connection |
| Connection method IN | Screw terminal blocks |
| Connection method OUT | Screw terminal blocks |
| Screw thread | M3 |
| Tightening torque | 0.6 Nm |
| Stripping length | 8 mm |
| Conductor cross section flexible | 0.2 mm² ... 2.5 mm² |
| Conductor cross section solid | 0.2 mm² ... 4 mm² |
| Conductor cross section AWG | 24 ... 14 |
Standards and Regulations
| Standards/specifications | EN 61643-21 2001 + A1:2009 + A2:2013 |
| Standards/specifications | EN 60079-0 2012 |
| Standards/specifications | EN 60079-11 2012 |
| Standards/specifications | EN 60079-26 2007 |
| Standards/specifications | IEC 60079-0 2011 |
| Standards/specifications | IEC 60079-11 2011 |
| Standards/specifications | IEC 60079-26 2006 |
Ex data
| Maximum inner capacitance Ci | 2 nF |
| Max. internal inductance Li | 1 µH |
| Maximum inner time factor (Ri/Li) | 0.1 µs |
| Max. input current Ii | 250 mA (TA < 40 °C) |
| Max. input voltage Ui | 30 V DC |
| max. input power Pi | 0.75 W |
| Ambient Temperature (Operation) | -40 °C ... 40 °C (T6 / 85 °C) |
| Ambient Temperature (Operation) | -40 °C ... 50 °C (T5 / T 100 °C) |
| Ambient Temperature (Operation) | -40 °C ... 80 °C (T4 / 135 °C) |
Conformity / approvals
| ATEX | ??? II 1G Ex ia IIC T4...T6 Ga |
| ATEX | ??? II 1D Ex ia IIIC T135°C...T85°C Da |
| IECEx | Ex ia IIC T4...T6 Ga |
| IECEx | Ex ia IIIC T135 °C...T85 °C Da |
Environmental Product Compliance
| REACh SVHC | Lead 7439-92-1 |
| China RoHS | Environmentally Friendly Use Period = 50 years |
| China RoHS | For details about hazardous substances go to tab “Downloads”, Category “Manufacturer's declaration” |
Accessories
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Additional Information
| Pack Size | 14 |
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