The unwinder, MP… EX, are equipped with a blocking cable device to the desired length, meter in meter approximately, it is enough to draw the cable until hearing the latch, at this moment, if the tension on the cable is slackened, the cable will remain blocked with the desired length.
For the recall of the cable it is then enough to exert a new traction on the cable until not hearing the pawl more, at this time, if the tension on the cable is slackened the return spring of the unwinder will act to bring back the cable towards its position of maximum rolling up.

Model MP3EX-E-I-4T1SI is planned for the connection of an intrinsic safety circuit and is particularly adapted for the connection of the earthing system MATIS-SDE4-NOMAD.

Model MP3EX-E-I-4T2SI is planned for the connection of 2 different intrinsic safety circuits.
Connection recommended is then: intrinsic safety loop n°1, wires 1 and 2 - intrinsic safety loop n°2, wires 3 and 4.

The unwinder will have to be connected to the ground by the screw located and envisaged for this purpose with a section of 4mm2.