Simple Selection, Easy to Use

µZ600 Series are “Shunt-diode” safety barriers to interface control room equipment with devices or instrumentation in Hazardous Locations using the protection technique of Intrinsic Safety to overcome the dangers posed by the presence of explosive atmospheres. Each barier channel is essentially a fuse-protected energy-diverting circuit zhere zener diodes limit voltage and series connected resistors limit current in Hazardous Location circuits.

The amount of energy transferred to the Hazardous Location is limited to a safe level incapable of igniting the explosive atmosphere but in normal operating conditions the barriers pass electrical signals in both directions without shunting them. Hazardous Location wiring and equpment are thus protected against normal and abnormal circumstances so that maintenance and calibration can be performed without particularprecautions.

The models in the µZ600 series have been carefully defined to meet all the normal signal interfacing requirements of a process plant and to make selection of the appropriate item as simple as possible.
By making the choice and use of barrier as easy as possible from a small number of general purpouse models helps to reduce the stocks held by the user whilst improving availability from the supplier. Special applications can also be accomodated through discussion with your factory representative.

Quick and easy assembly on standard 35mm DIN rail with round connection.

Download full datasheet (PDF) | Installation sheet (PDF) | Technical specifications (PDF)

Simple Protection, Readily Available
With ordinary safety barriers when the circuit is overloaded, often during installation or commissining, the safety fuse is ruptured and the whole barrier must be removed from its mounting and replaced.
In the µZ600 an additional fuse for each channel, external to the safety component, is used to protect the circuit against the effects of overload conditions. This secondary 5x20 mm size standard fuse is replaceable without removing the barrier or disconnecting the wiring. Most of model have the same value fuse reducung spare needs.

Simple to Maintain and Commission
There is no need for additional conventional terminals in the field wiring when using µZ600 since the replaceable fuse also provides a convenient “knife-edge” disconnect function. The circuit loop can be “opened” leaving the wiring securely in place to simplify the checking of the installation and circuit testing.

Simple to Mount, Secure Protection
The µZ600 are easy to install into your instrumentation system without the need for custom tools or special mounting hardware - just clip them onto a DIN rail. This simple operation not only secures them mechanically but also provides the connection to ground for the barrier without having to make a separate connection for each one.

Simple to Wire, no Mess
Three terminals are provided on both safe and hazardous sides of the µZ600 barrier to make connection into the circuit simple and straightforward, including cable screens. Clear and convenient tagging is available on the top face of each barrier zithout requiring clumsy additional components.

Applications

µZ600 Series barriers have been designed to meet the majority of intrinsic safety applications so that “simple” apparatus, such as thermocouples, resistive sensors, switches or “Intrinsically Safe” apparatus, for example 2-wire transmitters, I/P converters, solenoid valves can be easily interfaced.
Housed in a small plastic enclosure, µZ600 Series can be mounted side by on a standard top hat 35 mm DIN rail and their compact dimensions allows very high density barrier installations to be obtained. The mounting foot of the barrier also provides the electrical connection to the protective earth or ground, without requiring the use of separate conductors for each barrier, greatly simplifying installation.

The low of height of the barrier, allows the µZ600 to be mounted in small instrument and termination enclosures. Each channel of µZ600 has an additional replaceable fuse to protect the barrier in case of voltage surge or faulty connection, giving a considerable cost saving over conventional unprotected barriers. This replaceable fuse also provides a convenient means of disconnecting or open-circuiting the instrument loop without interfering with the wiring, making commissioning and mainetnance operations much easier.

µZ600 Series barriers are designed for approval worldwide for all gases and all Zones/Divisions to make them suitable for installation everywhere.