New solenoid interlocks for Ex zones
At the Powtech 2019, the steute business unit “Extreme” will be presenting a new solenoid interlock for gas and dust explosive zones. Features of the Ex STM 298-3GD safety switch include a very compact, slim design, making it well suited to mounting on mechanically engineered profile systems and in narrow installations.
The die-cast aluminium housing contains a robust switching system which ensures that the guard door locks securely. High locking forces (up to 3000 N with straight or sliding actuators) can be achieved. This reliably prevents machine operators from opening the guard door before the dangerous movement has come to a stop.
The new solenoid interlock is extremely versatile because it comes with a choice of actuators (straight, angled or sliding) and because the position of the actuator head can be staggered at 90° intervals. Users also have a choice of options regarding the switching inserts: the range includes different NO/NC variants.
In addition, the Ex STM 298-3GD is suitable for applications with a high switching frequency and in adverse environments requiring protection classes up to IP 67.
In accordance with the ATEX guidelines, the Ex STM 298-3GD is approved for gas Ex zone 2 and dust Ex zone 22. Typical applications for the dust explosive variant, which will be presented at the Powtech for the first time, include the safe locking of guard doors integrated in production, filling or packaging machines for dust-inducing products or powder goods.
steute at the Powtech, Hall 1, Booth 327
