Inputs / Outputs; Grounding And Equipotential Bonding - Bopp & Reuther Vortex VTX3 K i Ex Supplementary Instructions Manual

ELECTRICAL CONNECTIONS
4

4.3 Inputs / Outputs

The terminal assignment is described in the manual. The signal circuits of the vortex flowmeters
may only be connected to certified intrinsically safe slave units or circuits.
For more information refer to chapter "Electrical data".
The current output, the current input and the binary output are designed for connection to a
certified, intrinsically safe circuit in protection type "intrinsic safety Ex ia IIC or Ex ib IIC".
The bus connections are designed for connection to a certified, intrinsically safe circuit in
protection type "intrinsic safety Ex ia IIC or Ex ib IIC" according to the FISCO model or according
to the entity concept.
The current output, the current input and the binary output are reliably separated up to a peak
voltage of 60 V. All signal circuits are electrically isolated from the ground.

4.4 Grounding and equipotential bonding

CAUTION!
Equipotential bonding Equipotential bonding Equipotential bonding Equipotential bonding
Vortex signal converters and flow sensors must be included in the on-site equipotential bonding
system according to EN 60079-14! They are connected to the PA terminals.
For compact versions and measuring devices with flange connections, the flow sensor is
conductively connected to the pipeline.
For compact versions and measuring device of the type "sandwich", a separate conductor
connected either to the internal or external PA terminal must be provided to connect to the
equipotential bonding.
Figure 4-1: Ground connection of the compact version
1 Electrical grounding connection on connection piece between the flow sensor and the signal converter
2 Electrical grounding terminal in the housing
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VTX3
12/2018 - Z-EN-09001-id-A Exi-Gb