System 9000 Backplane - PR Electronics 7908

System 9000 Backplane – PR Electronics 7908

Provides safe, easy wiring between the backplane and non I.S. automation systems using standard prefabricated I/O cables
Direct, Redundant and Duplicate signalling – including HART I/O
Robust, compact high-end design solution for 8 system 9000 units
Digital output and LEDs indicate backplane system status

Enquiry

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.

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.

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.

Specification

ENVIRONMENTAL CONDITIONS
Operating temperature	-20°C to +60°C
Storage temperature	-40°C to +85°C
Relative humidity	< 95% RH (non-cond.)
Installation in	Pollution degree 2 & meas. / overvoltage cat. II
MECHANICAL SPECIFICATIONS
Dimensions (HxWxD)	144 x 247 x 141 mm
Wire size	2.5 mm2 / AWG 12 (Supply 1 / 2 and status relay connectors)
COMMON SPECIFICATIONS
Supply
Supply voltage	20…31.2 VDC (24 DC nom.)
Max. required power	≤ 30 W
Isolation voltage
Isolation voltage, test / working	500 VAC / 50 VAC (Basic isolation between supply 1 & 2 and status relay)
Replaceable fuses	Fuse F1 & F2: 1.6 A SB, 250 V, type TR5
OUTPUT SPECIFICATIONS
Status relay
Max. voltage	32 V (Zone 2 / Div. 2 area) 42 V (Safe area)
Max. current	100 mA (Zone 2 / Div. 2 area) 100 mA (Safe area)
OBSERVED AUTHORITY REQUIREMENTS
EMC	2014/30/EU
EAC	TR-CU 020/2011
APPROVALS
UL	UL 508 / C22.2 no. 14
ATEX	DEKRA 13ATEX0136X
IECEx	DEK 13.0044X
FM	0003049918-C

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