NK Technologies ASM Series Load Monitoring Self-Calibrating AC Current Operated Switches

NK Technologies

Key Features:

    Self-powered & Self Calibrating
  • Speeds start-up, cuts installation costs
    Choose the Operating Style that Matches your Application
  • Status monitoring, overload and operating window options
    Universal Output
  • AC or DC compatibility with any automation system
    UL, CUL and CE Approval
  • Accepted worldwide
Product Options:

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NK Technologies ASM Series Load Monitoring Self-Calibrating AC Current Operated Switches, Self-Powered, SmartLED, 1.5 - 150A Setpoint Range for Fixed Core Units, 2.5 - 150A Setpoint Range for Split Core Units

The 'ASM' Series Load Monitoring Switches from NK Technologies are designed for overload, underload or operating window applications.  Upon sensing an average operating current, the ASM selflearns and establishes a limit-alarm trip point based on +/- 15% of the average expected current draw. The ASM offers a choice of solid state outputs and is available in solid or split-core enclosure styles.

Power Supply None—Self-powered
Output Magnetically isolated solid-state relay
Output Rating • N.O. Version: 0.30 A @ 135 VAC or VDC
• N.C. Version: 0.20 A @ 135 VAC or VDC
• Not polarity sensitive
Off-state Leakage <10 μA
Response Time 200 ms
Setpoint Range • Solid-core: 1.5–150 A
• Split-core: 2.8–150 A
Setpoint • Overload: +25% of Load (-OL)
• Underload: -15% of Load (-UL)
• Over/Underload: -15 to +25% of load (OU)
Hysteresis 5% of setpoint
Overload 500 A @ 6sec., 1000 A @ 1sec.
Isolation Voltage UL listed to 1270 VAC, tested to 5000 VAC
Frequency Range 6–100 Hz
Dimensions 3.50" x 2.25" x 1.20", Aperture: 0.74"–0.85"
Case UL94 V0 Flammability Rated
Environmental -4 to 122°F (-20 to 50°C)
0–95% RH, non-condensing
Listings UL/cUL, CE
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Conveyors (-OL option)

  • Detects jams and overloads
  • Interlocks multiple conveyor sections
  • Electronic Proof of Flow (-UL option)

  • More reliable than electro-mechanical pressure or flow switches. No need for pipe or duct penetrations
  • Pump Protection (-OU option)

  • Provides overload (jams) and underload (suction loss) indication