Bürkert 8643 PA, Operating Instruction

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SystemDescription
5 SYSTEM DESCRIPTION
5.1 General Description
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 and IECEx for use in
Zone 1 and 21.
The device is available either in an aluminium or polyester body belonging to protection class IP65.
All cable glands are situated on the underside. There are two versions of the different bus concepts:
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.
5.1.1 Advantages and technical features
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
• Body: 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)
• Interfaces: PROFIBUS PA
• Outputs: 4x Ex-i DO; inputs: 8x Ex-i DI
• Approval according to ATEX: II 2 (1) G Ex e mb [ia IIC Ga] IIC T4 Gb
II 2 (1) D Ex tb [ia IIIC Da] IIIC T65 °C Db IP65
• Approval according to IECEx: Ex e mb [ia IIC Ga] IIC T4 Gb
Ex tb [ia IIIC Da] IIIC T65 °C Db IP65
english
Type 8643 PA