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ESP SL LED 4-20 mA Series

The ESP SL LED 4-20 mA Series is a combined Category D, C, B tested protector (to BS EN 61643) suitable for twisted pair 4-20 mA loop systems with innovative LED protector status indication.

For use at boundaries up to LPZ 0 to protect against flashover (typically the service entrance location) through to LPZ 3 to protect sensitive electronic equipment (e.g. transmitters, monitors, controllers).

Features & benefits

  • Very low let-through voltage (enhanced protection to IEC/BS EN 62305) between all lines
  • Full Mode design capable of handling partial lightning currents as well as allowing continual operation of protected equipment
  • Repeated protection in lightning intense environments
  • Innovative LED indication of protection status provides easy visual checking and quick maintenance
  • Ultra slim 7 mm width ideal for compact protection of large numbers of lines (e.g. process control installations)
  • Two stage removable protection module with simple quick release mechanism allowing partial removal for easy line commissioning and maintenance as well as full removal for protection replacement
  • Very low (1 Ω) in-line resistance for minimal system interference
  • High (75 mA) maximum running current - can also be used on 10-50 mA systems (e.g. process control)
  • Screen terminal enables easy connection of cable screen to earth
  • Strong, flame retardant, polycarbonate housing
  • Built-in innovative DIN rail foot with locking feature for simple positioning and clip-on mounting to top hat DIN rails
  • 4 mm² terminals allow for larger cross section wiring, stranded wires terminated with ferrules or fitting two wires into a single terminal
  • Convenient earthing through DIN foot and/or earth terminal