Description
NK ATS2-420-NCAC-24U-FL – AC Current Transducer/Switch with Digital Setpoint Display, ATS Series

- ATS series
- AC current transducer/switch with digital setpoint display
- Range = 0-200 Analog, 4-200 switch adjustment
- Analog Signal Type = 4-20 mA (powered by sensor)
- Output Contact = Normally Closed, opens on current rise, AC control only
- Power supply = 24 VAC or DC
- Case style = solid-core
ATS Series AC Current Sensors combine a current operated switch and transducer into a single package. The FL model features a digital display that gives visual indication of the setpoint for greater accuracy. The sensor provides a solid-state contact which will change state when the current exceeds an adjustable level or falls below the normal running current. This means reduced installation time, plus the option to have local control of a starter coil while at the same time sending the analog signal back to a controller housed in a separate cabinet.
Pump Jam & Suction Loss Protection

AC Current Transducer Applications
Electronic Proof of Operation
- Current operated switches eliminate the need for multiple pipe or duct penetrations and are more reliable than electromechanical pressure or flow switches.
Conveyors
- Detect jams and overloads.
- Interlock multiple conveyor sections.
Pump Control
- Provides signal to measure current and shuts down the pump if the current rises over the setpoint.
Cooling Towers
- Analog monitors time of use and contact opens if a filter clogs.
AC Current Transducer Features
Solid-state Output
- N.O. or N.C. solid-state switch for control circuits up to 240 VAC.
- Compatible with most automation systems.
External Powered
- Allows for higher accuracy.
Easily Adjustable and Precise Setpoint
- Speeds startup.
Analog Output
- Measures the current used at all times.
LED Display
- Provides quick visual indication of where the contact changes. Display flashes on and off when current has exceeded the setpoint.
- Easiest and most accurate setpoint adjustment available.
Built-in Mounting Feet
- Simple, two-screw panel mounting or attach with DIN rail brackets (included).*
UL/cUL and CE Approved
- Accepted worldwide.
AC Current Transducer Connections

Display shows the trip point, and flashes when AC current exceeds that value. A trip point of 15 A is displayed as 015.
AC Current Transducer Ordering Information
Sample Model Number: ATS1-420-NOAC-24U-FL
Adjustable AC current operated switch/transducer, normally open, solid-core case. (DIN rail adapters are included)
| (1) | (2) | (3) | (4) | (5) | |||||||||||||
| ATS | – | – | – | 2 | 4 | U | – | F | L | ||||||||
| (1) Range | |
| 1 | 0-50 Analog, 1-50 switch adjustment |
| 2 | 0-200 Analog, 4-200 switch adjustment |
| (2) Analog Signal Type | |
| 420 | 4-20 mA (powered by sensor) |
| 005 | 0-5 VDC |
| 010 | 0-10 VDC |
| (3) Output Contact | |
| NOAC | Normally Open, closes on current rise, AC control only |
| NCAC | Normally Closed, opens on current rise, AC control only |
| (4) Power Supply | |
| 24U | 24 VAC or DC |
| (5) Case Style | |
| FL | Solid core |




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