Burkert Type 8643 - Manual (Page 12)

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System Description
sysTEm DEsCriPTion 6.
general Description 6.1.
The Power I/O Box Type 8643 with PROFIBUS PA connection (stated below as the Power I/O Box Type 8643)
is used to connect binary signals to the PROFIBUS PA.
It is suitable for use in areas where there is a risk of explosion, authorized according to ATEX for use in Zone 1
and 21.
The device is available either in an aluminium or polyester housing belonging to protection class IP65.
All cable glands are situated on the underside. There are two versions of the different bus concepts:
2-wire version
In the 2-wire version a separate cable is not required for the Ex-e bus on account of the available current up to
1.5 A.
4-wire version
In the 4-wire version the device is supplied for the Ex-i bus (FISCO) via a voltage source, as the usable energy
from the bus line is severely restricted. However, the connection to an Ex-e bus is also possible.
Advantages and technical features 6.1.1.
advantages of the power i/o Box
Simple and safe installation. •
Reliable galvanic isolation between power supply, bus connection and the inputs or outputs. •
Reliable IP protection. •
technical features of the power i/o Box
Available either as a 2-wire or 4-wire device. •
Housing: Polyester, powder-coated aluminium. •
Protection class: IP65 (as electronic module IP20/IP30) •
Temperature range from –20 to +55 °C (see table in the EC-Type Examination Certificate in the Appendix) •
Interfaces: PROFIBUS PA •
Outputs: 4x Ex-i DO; inputs: 8x Ex-i DI •
Optional: LED module for status display of the inputs and outputs •
Approval according to ATEX: II 2 (1) G Ex mb e [ia] IIC T4 •
Rating plate
english
Type 8643 PA