These barriers are used to
transfer signals from switches, contacts and proximity sensors in a hazardous
area back into a safe area. In the case of proximity sensors or other devices
not classified as ‘simple apparatus’, care must be exercised in ensuring that
the power supplied by these barriers does not exceed the maximum safety values
permissible for the field device. These values are shown on the certificate
accompanying the field device and the safety values for the barriers are shown
on the barrier certificate which can be accessed by clicking the links below.
These barriers often transfer the digital inputs from
Sensors manufactured to the Namur Standard
and switches back to the
PLC or DCS System.
Various matching sensors are
available in the Sensors Section
Note: Universal Supply Voltage
20-250Vac & 20-125Vdc:
- Connect to 24Vdc, 100Vac or 230Vac -Same Terminals!
Saves on spares.
One model for all Switch/Sensor applications!
shown are certified: Ex II (1) GD [EEx ia] IIC
SIL2 according to IEC61508