RLN42 NAMUR isolating amplifier

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 signals

• Wide-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 circuit

• Monitoring of input circuits for line faults such as line break and short-circuit (LFD), disengageable

• Output-side relay contacts as signal output, direction of action can be selected via DIP switches

• Ambient 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

• Measuring principle

  Active barrier

• Measuring principle

  NAMUR isolating amplifier

• Function

  2-channel, changeover contact

• Loop power supply

  8 V DC

• Power Supply

  20...250 V AC/DC

• Auxiliary power supply / Loop power supply

  8 V DC

• Input

  NAMUR
  blocking: < 1,2 mA
  conducting: > 2,1 mA

• Output

  relay contact

• 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

• Operation

  DIP switch