Back

WZA/S - Emergency Stop Switch

Emergency Stop Switch type WZA was designed to be used in safety circuits of mining machines such as for example belt conveyors, lifts, etc. In case of emergency the serial safety circuit can be broken by the user by pulling the cord or pressing the button. Each switch has a LED status light (contracted / not contracted ). The manufacturer provides the device with or without the junction chamber - enabling possibility to connect to loudspeaking device. Additional built-in contacts enable sending a remote identification signal of the switch via a digital data network. Device is made as intrinsically safe, allowing their use in mining in areas with danger of explosion of methane and / or coal dust.

Technical data

Certificate Number functional Safety OBAC/08/MD/SIL/325
ATEX certificate number KDB 04ATEX270
Casing protection degree Ip54
Device Group I
Device category M1
Casing type Ex ia I
Supply voltage U = 5 ÷ 15 VDC
Power Consumption I = 10mA N
Total number of contacts 3 changeover contacts
Maximum supply voltage 42 V for circuits ia lub Ib
Width x Height x Depth 330 x 218 x 98 mm (WZA/1)
330 x 268 x 98 mm (WZA/2)
Number of outlets / cable connectors 2 (WZA/1), 4 (WZA/2)
Working temperature range -20ºC ÷ 40ºC
Weight 3 kg
European funds