HDT/6/24-F0,25

HDT/6/24-F* is a range of combined two-stage surge protection intended for a low voltage data and power supply lines routed by a common cable. An example might be a pair of RS485 data line wires and a pair of 24 V DC power line wires routed by a common cable from the control system to remote sensors requiring an external supply voltage. The module can also be used to connect many other types of analog or digital sensors with symmetrical or asymmetrical output. The protection module must be installed just before the protected device. The 1st stage of surge protection consists of three-pole gas discharge tubes, the 2nd stage is using transils. The overcurrent protection of the power supply line is ensured by a PPTC resettable fuse. The fuse heats up during the overcurrent and its internal resistance increases by several levels. This will limit (not interrupt) the flowing current. The green LED has only an orientation function about the presence of voltage on the power supply line. To reset the resettable fuse, the circuit must be switched off and let the fuse cool down. Unlike a standard fuse, resettable fuses do not have to be changed, which can reduce the service interventions or make the service faster.

Dimension drawing
Dimension drawing
Installation diagram
Installation diagram
Internal wiring diagram
Internal wiring diagram
PARAMETERS
Ochrana datové linky
Nominal voltage Un 6 V DC
Maximum continuous operating voltage Uc 7,2 V DC
Rated current IL 100 mA
Power supply system protection
Nominal voltage UN 24 V DC
Maximum continuous operating voltage UC 28,6 V DC
Rated current IL 250 mA
Hold-current of the resettable fuse at -40; 23; 70 °C Ihold 408; 250; 133 mA
Trip-current of the resettable fuse at -40; 23; 70 °C Itrip 816; 500; 266 mA
C1 Nominal discharge current (8/20 µs) In 1 kA
C1 Voltage protection level line-G at In line/G Up 40 V
C2 Voltage protection level at In line/line Up 35 V
C2 Nominal discharge current (8/20 µs) In 10 kA
C2 Voltage protection level line-G at In line/G Up 60 V
C2 Voltage protection level at In line/line UP 40 V
C3 Voltage protection level line-G at 1 kV/µs Up 35 V
C3 Voltage protection level at 1 kV/µS line/line UP 35 V
Operating temperature ϑ -40 °C ÷ +70 °C
Recommended section of the connected conductors S 0,25 ÷ 1,5 mm2
Degree of protection of enclosure IP20
Examinations according to EN 61643-21 (IEC 61643-21:2000)
Article number 56 100
NOTES

Note:  The current of the resettable fuse Ihold is a value valid for an ambient temperature of 23 °C at which the fuse has not tripped yet. The current Itrip is a value at which the fuse will definitely trip and this value is equal to twice the current Ihold. For another ambient temperature, the Ihold value must be multiplied by a coefficient according to the formula k=(123-Ta)/100 [-, °C], where Tis the actual ambient temperature of the fuse.

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