Shielding hood ZS9100-0003
The shielding hood is an optional component for the ELMxxxx housing series. It has to be ordered separately.
It does not affect the visibility of the LED displays of the terminal.
The shielding hood has two purposes
- Electromagnetic shielding of faults
If push-in connectors are used, they represent a gateway for faults in the terminal, due to the fact that they are made of plastic. The shielding hood can be installed (either right away or retrospectively) in order to form an enclosed metallic cage around the terminal and the signal cable.
Alternatively, ELMxxxx terminals with shielded plug connectors can be used (e.g. LEMO, BNC), in which case the shielding hood is not required. - Thermal shielding for thermocouple measurements
If the ELM3xxx terminal is used for measuring temperatures with thermocouples, the integrated cold junction measurement contributes significantly to the overall uncertainty. Thermal turbulence caused by air flowing past and radiant heat can lead to large temperature gradients around the plug, resulting in fluctuating temperature measurements. The shielding hood facilitates a thermally stabilized environment around the plug, which helps to increase the measuring accuracy.
Between one and four commercially available signal lines up to approx. 7 mm shield diameter (usually corresponds to approx. 9 mm outer diameter) can be connected.
Technical data | ZS9100-0003 |
|---|---|
Weight | approx. 190 g |
Dimensions (W x H x D) | 26 x 145 x 93 mm effective extended width after mounting: 74 mm |
Permissible ambient temperature range during operation and storage | -40…+85 °C |
Vibration/shock resistance | conforms to EN 60068-2-6 / EN 60068-2-27 Usage restriction: see below |
Protection class | IP 20 |
Installation position | variable |
Approval | CE |
The shielding hood should be installed as follows:
- Use a screwdriver to lever off the two painted plastic covers on the top and bottom of the ELM housing; retain the covers for later reuse
- Slide on the shield connection and fasten it with the three screws provided. The fourth screw hole is intended for a PE connection, if required.
- Remove the sheathing from the signal cables and insert the wires into the connectors (A). Then push the shield braid into the EMC clamp (B) and fasten the cable to the strain relief clip (C) using the cable tie provided. Follow the cable manufacturer's recommendations for the bending radius.
- The shield braid should rest on the conductive foam block (D). This block ensures EMC-compliant sealing when the hood is closed.
- Position the hood and hand-tighten it with the knurled screw. Ensure that the unpainted sections and the foam block are in close contact.
- For disassembly, proceed in reverse order.
Any component identification should be replicated on the hood.
Notice | |
Note for use under vibration load An application of the ELM terminal with mounted shielding hood ZS9100-0003 under vibration and shock effect in the direction of DIN rail track (red arrow) is, regardless of the installation position, not allowed. If vibration / shock inevitably occurs during operation, an installation position must be selected which does not load the ELM terminal and accordingly the shielding hood in the indicated direction of the arrow. |
