KROHNE IFC 210 E-EEx EN - Manual (Page 57)

Part C Special applications, functional checks, service, and order numbers Sect. 6.1
05/2002 IFC 210 E 57
Note polarization code of plug XA!
Important, please note.
•
Univeral supply 24 V DC / AC
When connected to a “functional extra-low voltage with safety
separation” power source (SELV or PELV) in accordance with VDE 0100, Part 410,
connection of a safety conductor (PE) is not required.
•
Equipotential bonding
Independent of the type of power supply, IFC 210 E – EEx signal converters must be
incorporated in the PA equipotential bonding system. To achieve equipotential
bonding, terminals d14, d16, d18, d20 must be connected to the appropriate ground
potential of the hazardous area.
IFC 210E-EEx is ungrounded in the electrode circuit, but the primary head is not!
For that reason, equipotential bonding is required in the entire run of the intrinsically
safe cable!
Cancellation of equipotential bonding is only permitted when the device is
disconnected from supply.
6.1.4 Fuse protection of the field power circuit
The field power circuit is fuse-protected in the IFC 210E –EEx signal converter by two
TR5 fusible links on the amplifier board (ADC/FSV), see Fig. A in Sect. 8.4.
Before starting up the system, check that both nominal fuse values are consistent with the
maximum allowable nominal value specified for the primary head.