Control unit

Two types of control units for simple and complex systems:

• CUP0302D-S: the simplest, stand-alone configuration for one zone only, typically used in simple stand-alone safety systems such as chemical barriers, fast-closing valves etc.
  
  
• CUP0302D-B: the basic configuration for more complex safety systems such as explosion suppression or when several simple systems must to be controlled/monitored from a central point. 
  
  
• CUP0302D-E: an extension unit for up to 6 zones
• CUP0302D-Z: an extension unit for 1 zone

Flexible control units

The -B control unit is the heart of the system. This unit is equipped with a memory, an LCD screen and controls all connected zones. The maximum number of zones a -B unit can manage is 16. If so desired, these can be distributed throughout plant by way of -E or -Z extensions. Up to 6 zones can be built into each -B and -E unit. The -Z unit is equipped for a single zone only. The number of -E and -Z units that can be connected to a single -B unit is limited to 16 zones.

The ZCN type zone modules that are installed in the -B, -E and -Z units can be easily snapped into the units without switching off power (“hot swappable,” thus all zones already operational do not need to be switched off). All units (with exception of the -S unit) are interconnected by means of a bus cable.

The various options for a control unit

The functioning of the control unit is always the same, regardless of configuration and the unit used, with the exception of the stand-alone version (-S) which does not have a memory or an LCD and, since it is a stand-alone version, cannot be controlled from a central point.

Your options:

• Up to 16 devices can be controlled per zone: extinguishing agent bottles, FSGVs and other StuvEx systems. This limit can (theoretically) be increased infinitely by making use of the “cross firing” function.
• Simultaneous monitoring of up to 4 detectors, which can be connected as a group in an OR or AND function. In case of an AND function, it is also possible to generate a fault if 1 detector is in alarm for 5 seconds and no second detector goes into alarm; this avoids unwanted and false alarms.
• The ability to connect an external interlock: this allows the safety circle to be closed; the zone cannot be reset before the external interlock circuit is closed (e.g. a switch on an inspection hatch), and the process cannot be restarted until the zone has been reset.
• The on/off and reset switches on the zone modules can also be wired externally, so that a key switch or a switch with a padlock can be installed on the machine for safer maintenance. This is also a form of external interlock.
• Very stable protocol that virtually excludes external EMC interference on the wiring
• Cross Fire functionality: this allows a barrier between, for example, two volumes to be controlled from two different zones. If necessary, this barrier can also be equipped with “its own” detectors.
• Exchangeable without having to switch off the electric mains (hot swappable).

The right housing for your control unit

The basic model of all units includes a steel housing, IP65, suitable for use in a zone 22 or 21 environment. On request, however, the units can also be supplied with stainless steel housing and/or for use in gas Ex zones (1 or 2). We adapt our solutions to your specific needs!

Certified control units and systems

The units are a component of a certified ATEX 'safety system', but they of course also have their own certificate as a component. Consequently, any application must be based on the instructions contained in the ATEX certificate, the product  specifications and the user manual.

Technical specifications of our control units

A StuvEx product specialist is at your disposal for advice and comprehensive documentation.