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Products » By Manufacturer » Smar - Industrial Automation » Safety Barriers » H1 Intrinsically Safe Barrier And Fieldbus Repeater - SB312

H1 Intrinsically Safe Barrier And Fieldbus Repeater - SB312

SB312 - LP
FISCO Intrinsically Safe Fieldbus / Profibus Barrier and Repeater

The SB312-LP uses Intrinsically Safe (I.S.) technology to completely isolate the control network on the hazardous side of the barrier. It supplies up to 80mA to field devices located in the hazardous area in accordance with the FISCO model.

The incorporated repeater (operating in compliance with IEC 1158-2 specifications at 31.25 Kbits/s) cleans and boosts the incoming communication signal, transmitting it to instruments inside the hazardous environment without compromising the safety
requirements of explosion proof wiring.

The networks on the hazardous and safe sides of the SB312-LP are completely independent of each other.

The SB312-LP also incorporates bus termination for the hazardous network in its design so that only one far terminator is required and up to a 2.5 mm2 (12 AWG) conductor can be used.

Features

H1 Isolated Barrier and I.S. Power Supply
Built-in H1 Fieldbus Signal Repeater
Bus termination on Hazardous side
Provides up to 80mA at 14V to the Hazardous Network for field devices
Can be installed in safe area (Div. 2/Zone 2 or Div. 1/Zone 1)
Conforms to IEC 1158-2, 31.25 Kbit/s standard for Foundation Fieldbus and PROFIBUS
Complies with FISCO I.S. model
FM & CENELEC Intrinsic Safety standards certified
Based on PTB Report W-53, Investigations into Intrinsic Safety of Fieldbus Systems

Some Characteristics:

Power Supply Input	Rated Input Voltage: 24 VDC ? 5 %
Power Supply	Maximum Voltage available at the barrier terminals at maximum Maximum current: 80 mA @ 14V Short Circuit Electronic Protection: Trigger @ 100 mA Steady State @ 45 mA
Safety Parameters (Hazardous Area)	Open Circuit Voltage (Voc):15 VDC and Power: 1887 mW Short Circuit Current (Isc): 221.7 mA, Is=125.8 mA at 15V Max. Allowed Capacitance: Refer to FISCO standard Max. Allowed Inductance: Refer to FISCO standard
Internal Dissipation	3W maximum at 24V input, nominal Conditions
Cable Length Parameters*	15 Ohm/km =0,1 mH/km =80 nF/km =
Digital Signal Transmission	Compatible with 31.25kbit/sec Fieldbus systems
Fuse	Safe area Power Supply: 400mA Hazardous area: 125mA Safe Area Fieldbus: 100mA
Terminals	Accommodate conductors up to 2.5 mm² (12AWG)
Isolation	2500V galvanic isolation between input, output, and power supply terminals. Tested at 1500Vrms minimum between hazardous and safe area terminals.
Ambient Temperature	-20? to + 60?C (Continuous operation) -40? to + 80?C (storage - off line)
Humidity	-5% to 95% relative humidity
Marking	Ex II (1)G [Eex ia] IIB/IIC Ex I M2 [Eex ia] I SB312 I.S. Barrier: It should be physically located in a safe area

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