| NK Technologies - ASM Series, Self-Calibrating Current Switches |
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| ASM Series Load Monitoring Switches are designed for overload, underload or operating window applications. Upon sensing an average operating current, the ASM self-learns and establishes a limit-alarm trip point based on +/- 15% of the average expected current draw. The ASM is available in solid- or splitcore enclosure styles. |
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Download Complete Specifications in .pdf Format |
Electronic Proof of Flow (-UL option)
- No need for pipe or duct penetrations.
- More reliable than electro-mechanical
pressure or flow switches.
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Conveyors (-OL option)
- Detects jams and overloads.
- Interlocks multiple conveyor sections.
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Lighting or Heating Circuits (-UL option)
Fast and easy installation. |
Pump Protection (-OU option)
Provides overload (jams) and underload (suction loss) indication. |
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- Self-powered and Self-calibrating - Speeds
start-ups, cuts installation costs.
- Status Monitoring, Overload, and Operating
Window Options - Choose the operating style that matches your application.
- Universal Output - AC or DC compatibility
with any automation system.
- UL, CUL and CE Approval - Accepted
worldwide.
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| Power Supply |
None — Self-powered |
| Output |
Magnetically Isolated Solid-State Switch |
| Output Rating Max. |
- N.O. Version: 0.30A @ 135 VAC or VDC
- Not polarity sensitive
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| Off State Leakage |
<10µA |
| Response Time |
200ms |
| Setpoint Range |
- Solid-core: 1.5–150A
- Split-core: 2.8–150A
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| Hysteresis |
5% of Setpoint |
| Overload |
500A @ 6sec., 1,000A @ 1sec. |
| Isolation Voltage |
UL Listed to 1,270VAC, tested to 5,000VAC |
| Frequency Range |
6–100Hz |
| Setpoint |
- Overload: +15% of Load (-OL)
- Underload: -15% of Load (-UL)
- Operating Window +/- 15% of Setpoint
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| Case |
UL 94V-O Flammability Rated |
| Environmental |
-58 to 122°F (-50 to 50°C) 0–95% RH, non-condensing |
| Listings |
UL 508 Industrial Control Equipment (USA & Canada), CE |
| Dimensions |
3.50" x 2.25" x 1.20", Aperture: 0.74"– 0.85" |
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| Ordering Information |
Download Complete Specifications in .pdf Format |
| Solid-Core Models |
| Model |
Description |
Output |
 ASM-NOU-OL-FT |
1.5–150A Self Calibrating Setpoint, Overload Only |
N.O., 0.15A@240VAC |
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ASM-NOU-OU-FT |
1.5–150A Self Calibrating Setpoint, Over/Underload |
N.O., 0.15A@240VAC |
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ASM-NOU-UL-FT |
1.5–150A Self Calibrating Setpoint, Underload Only |
N.O., 0.15A@240VAC |
| Split-Core Models |
| Model |
Description |
Output |
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ASM-NOU-OL-SP |
2.5–150A Self Calibrating Setpoint, Overload Only |
N.O., 0.15A@240VAC |
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ASM-NOU-OU-SP |
2.5–150A Self Calibrating Setpoint, Over/Underload |
N.O., 0.15A@240VAC |
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ASM-NOU-UL-SP |
2.5–150A Self Calibrating Setpoint, Underload Only |
N.O., 0.15A@240VAC |
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