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Revision 4
6.3.2
Terminal blocks
The device uses screw-type wire-to-board terminal blocks for electrical connections. See Table 4 for
specifications:
Table 4: Specifications of the terminal blocks
Connection method:
M3 slotted screw
Tightening torque:
0.5 ... 0.6 Nm (4.425 ... 5.310 in-lb)
Insulation stripping length:
8 mm (0.31 in)
Pitch:
5.08 mm (0.20 in)
Connection angle:
55°
Conductor size:
Solid
0.2 ... 4 mm
2
Flexible
0.2 ... 2.5 mm
2
AWG
24 ... 12
Terminal blocks are compatible with smaller conductor sizes than the minimum
conductor size that is recommended for the device. Do not use a conductor size that is
smaller than 0.3 mm
2
/ 22 AWG to make electrical connections on the device.
6.3.3
Grounding
WARNING!
Risk of injury
If the dust monitor is not grounded properly, it can display false measurement results.
In the worst case, this can result in severe health impacts to workers, or even a failure
of an explosion prevention system.
WARNING!
Risk of malfunction
Different ground potentials between the power supply and installation location can
create ground current loops, which can result in false measurement results. Depending
on the application, this can have severe implications on worker health and safety.
Always make sure that the device is grounded properly.
For proper and safe operation, it is critical that the device is properly connected to ground. The device is
equipped with one ground connection on the main board.
