SILASpz control unit

Model II



  • Black box system
  • Automatic calculation of the purge time
  • WEB interface
  • 3 x PT100/1000 inputs
  • Modular design
  • Separate purge gas input and output


Ex II 3G Ex ec mc ic [ic pzc] IIC T4 Gb
Ex II 3D Ex tc [ic pzc] IIIC T130 °C Db
Ex ec mc ic [ic pzc] IIC T4 Gb
Ex tc [ic pzc] IIIC T130 °C Db


Directive 2014/30/EU
Directive 2014/34/EU

Ambient temperature

In storage
-20 °C to +60 °C
During operation
-25 °C to +60 °C/T4
-25 °C to +50 °C/T5


IECEx BVS 19.0038x
BVS 19 ATEX E 015 X


The SILASpz Ex p control unit controls and monitors the pre-purge and operating phase of pressurised enclosure equipment protected in accordance with ignition protection type pz. Digital or proportional purge gas valves can be used as purge gas valves. The parameters can be set using the integrated WEB interface or the optionally available p operator panel. The SILASpz features two release relays; one which is energised and one which has floating contacts. Two signal relays with one changeover contact each are additionally available.
Three PT100/1000 inputs are available to monitor the temperature of the Ex pprotected equipment. Up to three switch values can be assigned to them. Model II comes complete with integrated pressure measurement. The following components are additionally required to set up a complete control system:
– Pressure monitor
– Purge gas valve, proportional or digital
– Valve fuse
– Pressure reducer
– There is the option to connect a p operator panel

Technical data *

Protection class IP 66 according to EN/IEC 60529
IP 64 according to EN/IEC 60079-0
Material V4A stainless steel
Weight 5.8 kg

*Refer to the documentation for more detailed information


Data Sheet - SILASpz control unit

Declaration of Conformity CE A1-37S2-7C0001