IoT Pro External Wiring
What you’ll need
1 mm drill bit (if an additional hole for a cable gland needs to be made)
12 mm drill bit (if an additional hole for a cable gland needs to be made)
19 mm deep hex socket (if an additional cable gland needs to be installed)
Cable gland options
The IoT Pro caters for six cable gland locations depending on the user’s requirements
The different cable gland locations are shown below:


Adding a cable gland to your device after delivery
Two cable gland sizes are available to accommodate different wire thicknesses: 5-6 mm and 7-8 mm
Ensure that no wires are near the drilling location when drilling holes into your device
Identify the desired cable gland location.
The different cable gland drilling locations are identified as shown below:


The drilling locations for the cable glands can also be identified by the following features on the inside of the housing:

Open the device as explained in Opening and Closing
Remove all boards inside your device to prevent any damage from occurring during drilling, refer to IoT Pro Assemble and Disassemble Boards
Use a 1 mm drill bit to drill a pilot hole at the end of the feature (as shown by the red marks above)
Use a 12 mm drill bit to widen the pilot hole to the correct size
Remove any plastic burrs with a deburring tool from the hole to ensure that a tight seal is created
Install the cable gland as follows:
Position the lock nut inside the device

Install the cable gland body with the washer as shown, and tighten with the 19 mm deep hex socket to 1±0.05 Nm with a calibrated torque wrench

Install the cable gland nut and proceed with wiring your device

Re-install the main board, GPIO board and battery or DC Power board (refer to IoT Pro Assemble and Disassemble Boards)
Close the device as explained in Opening and Closing
Cable options
We recommend the following cables to be utilized with your device to ensure effective sealing with the cable gland depending on application
Cable configuration | Outer Diameter | Application | Approved Product and Supplier |
|---|---|---|---|
2-core (2 x 0.5 mm²) | 4.8 mm | Indoor | https://www.tme.eu/mt/en/details/ob500-2x0.5/multicore-cables-unshielded/helukabel/11001/ |
2-core (2 x 0.75 mm²) | 5.3 mm | Outdoor | https://www.tme.eu/mt/en/details/oz500-bk-2x0.75/multicore-cables-unshielded/helukabel/10348/ |
3-core (3 x 0.5 mm²) | 5.1 mm | Indoor | https://www.tme.eu/mt/en/details/ob500-3x0.5/multicore-cables-unshielded/helukabel/11003/ |
3-core (3 x 0.5 mm²) | 5.1 mm | Outdoor | https://www.tme.eu/mt/en/details/oz600_3x0.5/multicore-cables-unshielded/helukabel/10552/ |
4-core (4 x 0.5 mm²) | 5.5 mm | Indoor | https://www.tme.eu/mt/en/details/ob500-4x0.5/multicore-cables-unshielded/helukabel/11005/ |
4-core (4 x 0.5 mm²) | 7.1 mm | Outdoor | https://www.tme.eu/mt/en/details/oz600_4x0.5/multicore-cables-unshielded/helukabel/10554/ |
We recommend the following solder seal heat shrink connectors for splicing cables with your device’s wiring
Wire cross-section | Approved Product and Supplier |
|---|---|
0.25 - 0.5 mm² | https://www.tme.eu/mt/en/details/sst001w/bootlace-ferrule-and-butt-splice/ninigi/ |
0.5 - 1.5 mm² | https://www.tme.eu/mt/en/details/sst002r/bootlace-ferrule-and-butt-splice/ninigi/ |
1.5 - 2.5 mm² | https://www.tme.eu/mt/en/details/sst003b/bootlace-ferrule-and-butt-splice/ninigi/ |