Crimping tools are used to deform materials and create connections. To connect wires together or to other connectors, crimping is commonly used in electrical work.
Figure 3. Crimping Tool - 24-10 AWG.
A wire cutter or cable cutter is a tool that cut wires and cables in a safe manner without damaging the insulation or conductors.
Figure 4. Precision Micro Wire Cutter. 
A Measure Tape is a tool used to measure length.
Figure 5. Measuring Tape.
Wire strippers are portable handheld tools used by workers, especially electricians, to remove the protective coating of electric wires for replacement or repair.
Figure 6. Stripping tool.
A tool used to cut wires or cables.
A durable, permanent connection can be created by joining conductive metal elements with solder. Soldering machines are essential tools for building, modifying, and repairing electronics.
Figure 8. Soldering Equipment.
Heat guns are devices that emit a jet of compressed air toward a particular point or surface.
Figure 9. Hot air gun.
Correct ferrule size must be selected based on the gauge of the wire, as a standard Rheonics uses ferrule with a pin length of 8mm and diameter of 1mm (cross-section 0.5mm2).
Figure 10. 22 AWG (8mm Pin) Insulated Ferrules 
Solder wires are wires with a low melting point, used to create joints using a soldering iron.
Figure 11. Solder wire
Heat shrink tubing is a common element in most electrical installations that protects wires from moisture, dust, abrasion, and sharp objects that might otherwise damage them.
Figure 12. Hear shrink tube
The SRV/SRD sensor is connected to its associated Zener diode barriers by means of a cable that has an 8-pole M12 connector on the sensor end.
The cable and connector selected must be rated for at least the highest ambient temperature at which the sensor will be used.
Figure 13. Ex sensor cable
Connector, Universal, 8-position, halogen-free, shielded, Socket straight M12, A-coded, Insulation displacement connection, knurl material: Zinc die-cast, nickel-plated, external cable diameter 5 mm ... 9.7 mm
Figure 14. M12 connector
This tape is commonly used to secure duct seams, connections, and joints. Additionally, it has excellent waterproof properties.
Once all the steps are completed we are going to obtain our Ex sensor cable with the following three sections.
Figure 16. Ex Sensor cable built by Rheonics.
2. Probe side M12 connector preparation
Figure 17. The sensor cable after the cable sheath is stripped away on the first 80mm.
Figure 18. Sensor cable fixed with metal tape.
After the cable shield has been fixed, the rest of the shield can be cut at the edge of the tape. Then pass all 8 wires of the cable through the sensor body. Take care not to damage the insulation of the wires. Push the cable completely into the sensor connector to ensure proper contact with the cable shield.
The connector body has 8 color marked slits in the front. Pull each wire into the slit marked with its
color as shown in Figure 19.
Figure 19: The connector body is shown from the front. It has 8 slits which are color marked according to wire color.
Figure 20. The connector body in front view after the wires have been shortened.
Figure 21. The sensor connector when it is closed.
3. SME electronics side sensor cable preparation for EX zener baarriers.
Figure 25. Metal shield twisted with heat shrink.
Figure 26. Ferrule crimped to the ground cable.
Figure 27: Preparation of the sensor cable to connect it to the Zener barriers.
Figure 28. Twisted cable shield.
Figure 29. Removing the plastic cover from the wires.
3.1. Preparing grounding cable
Heat Shrink tube
Hot air gun
Figure 30. Metal shield twisted with heat shrink.
Figure 31. Ferrule crimped to the ground cable
3.2. Installing crimpers in each sensor wire
Your crimping tool should have a nest for inserting the terminal. After inserting in the correct slot, squeeze the crimp tool firmly and release it to get a long-lasting, tight fuse.
Unused wires should be neither stripped nor crimped. We recommend protecting the ends with a shrink tube to avoid the ends making any electrical contacts.
We recommend crimping the ferrules on 4 sides for the connection with the Zener barriers.
Figure 32. Crimping the wire end.
Figure 33. Strip all eight wires on a length of 10 mm and put bootlace ferrules on the ends.
Figure 34. Wire ends stripped with crimped ferrules.
4. Ex zener barriers to SME connection
Next is the connection of the Zener barriers with the SME-DRM, the blue end is used to connect to the sensor that is installed in the hazardous area.
Figure 35. The connection between Zener barriers and SME-DRM
Various wires with crimped ends.
Zener barriers Z041x2 and Z757.
Figure 37. Zener barrier grounding.
Figure 38. Zener Barrier wired with SME-DRM.
6. Ex Sensor to Zener Barrier
5. Ex sensor to zener barrier
Ex Sensor cable with crimped ends.
Zener barrier Z041 x 2 and Z757
Figure 39. Wiring diagram with Pt1000 installed, 4-wire Pt1000 connection
Figure 40. Full wiring of the SME-DRM+Zener Barriers+Ex Sensor cable.
However, it is also possible to put the EX barriers in another enclosure and connect to the SME-TR or SME-TRD using cable glands.
Figure 42. Zener barriers are used in an outdoor enclosure when using the SME-TRD(Temporary image)
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