PR electronics 7908 Backplane. The 7908 backplane is a compact and robust solution that enables a safe and easy connection of PR system 9000 IS device signals into standard automation systems. Standard automation system cables and connectors are used to link the backplane to the I/O cards. The backplane can be used for Direct, Redundant, Duplicate signalling including HART I/O System connectivity (HART MUX). The system 9000 devices isolate and convert AI, AO, DI and DO signals coming from, or going to the I.S. classified area, and routes those signals to a system automation I/O card. The system 9000 units maintain a SIL2/SIL3 level of functional safety, even when mounted in the backplane solution.
Technical characteristics
Robust, compact high-end design that holds 8 system 9000 units.
Digital output indicates status of the 9000 devices and primary/back-up power supplies.
Flexible 24 VDC supply voltage and redundant power supply connection solution.
Mounting / installation / programming
Flexible horizontal/vertical panel or wall mounting in the Safe or Zone 2 / Div 2 areas.
System 9000 devices easily snap ON and OFF using piano keys, and devices can be hot-swapped.
Tag number and ID labels are easily mounted and read by using the dedicated piano key spacer.
Wide temperature operation range: -20...+60°C.
