The eight-channel multibarrier enables the
connection of a large number of field devices
to one fieldbus, according to IEC 61158-2.
8 Ex i field devices can be connected to each
multibarrier. Up to 32 Ex i field devices can be
connected to the bus. The number of nodes
can be increased thanks to the High Power Trunk Concept, through which Ex e fieldbus power is looped from multibarrier to multibarrier. In order to limit inrush currents at the
moment of turn-on, the spurs are switched
on one after the other. The field devices can
be supplied with a maximum of 40 mA. Each
spur is short-circuit protected through 50 mA
current limitation. Altogether, a maximum of
160 mA are available for nominal operation.
This current can be spread to the connected
field devices, for example:

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