The four-channel multibarrier enables the connection of a large number of field devices to
one fieldbus in the Ex area, according to IEC
61158-2.
Each multibarrier can take 4 Ex i field devices.
Up to 16 Ex i field devices can be connected
to the bus. Ex e fieldbus supply (High Power
Trunk Concept) which is looped through from
multibarrier to multibarrier allows to augment
the number of subscribers. In order to limit inrush currents at the moment of turn-on, the
drop lines/spurs are switched on one after the
other.
Inputs and outputs of the trunk line feature enhanced safety protection (Ex e) and the spurs
to the field devices are intrinsically safe (Ex i).

The multibarrier is equipped with an activatable terminating resistor for the bus. The terminating resistor is switched on/off by means
of a jumper.
Status and error messages of the single spurs
are indicated via LEDs at the front.

■ Galvanically separated Ex e bus cables
and Ex i outputs
■ Temperature range: -20…+70 °C
(-4 … +158 °F)
■ Integrated terminating resistor (optional activation)
■ output data: 10V/40mA (short-circuit proof)
■ Powder-coated die-cast aluminium housing
■ Pressure compensation element for protection against condensation
■ Connection of the housing potential via M5
x 1 bolt
■ FISCO compliant according to IEC
60079-11 and Entity