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RLN42 isolating amplifier, NAMUR switch
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Measuring principle
Active barrier
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Measuring principle
NAMUR isolating amplifier
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Function
2-channel, changeover contact
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Loop power supply
8 V DC
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Power Supply
20…250 V AC/DC
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Auxiliary power supply / Loop power supply
8 V DC
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Input
NAMUR
blocking: < 1,2 mA
conducting: > 2,1 mA -
Output
relay contact
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Certificates
ATEX IECEx II(1)G [Ex ia Ga] IIC, II(1) D [Ex ia Da] IIIC, II3G Ex ec nC IIC Gc
DNV -
SIL
SIL 2
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Operation
DIP switch
Field of application
The NAMUR isolating amplifier is designed for safe operation of proximity switches according to EN 60947-5-6 (NAMUR) as well as open and mechanical contacts with resistive coupling elements. It has a universal power supply (24 to 230 V AC/DC) and one relay output (changeover) per channel. The device is approved for intrinsically safe (Ex i) circuits up to zone 0 (gas) and zone 20 (dust) in the Ex area. RLN42 can be used in safety equipment up to SIL 2 in accordance with IEC 61508.
Isolating amplifier for binary switch signalsWide-range power supply (24 to 230 V AC/DC)Input for proximity sensors acc. to NAMUR (EN 60947-5-6); floating contacts or contacts with resistance circuitMonitoring of input circuits for line faults such as line break and short-circuit (LFD), disengageableOutput-side relay contacts as signal output, direction of action can be selected via DIP switchesAmbient temperatures -40 to 60 °C (-40 to 140 °F)Installation in hazardous areas zone 2 / div 2
Benefits
Simple and fast wiring with pluggable terminals Suited for use in safety instrumented systems up to SIL 2 (IEC 61508) Compact housing width with 17.5 mm (0.69 in) for efficient use of space Galvanic 3-way isolation