Description
NK DS3-SDT-24U – DC Current Sensor, DS3 Series

- DS3 series
- DC current sensor
- Setpoint range = 2-20, 10-50 and 20-100 A, jumper-selectable
- Output type = SPDT Relay (Form C)
- Power supply = +24 VAC/DC
Failure Detection

Current Sensing Switch Applications
Welders and Platers
- Instant indication of equipment status.
Large Drive Motors
- Provides enhanced field loss protection.
Power Supplies
- Signals overcurrent before equipment fails.
Machine Operation
- Instant status of motors, lamps and other loads.
Telecom Sites
- Monitors battery output.
Current Sensing Switch Features
Compact, One-piece Design
- Fits in easily amongst motor starters and power supplies in crowded control panels.
Input Isolation
- Safer than shunt/relay combinations.
Output Installation
- Isolated output greatly simplifies wiring.
Pluggable Terminals
- Speed installation.
Tough
- Designed to handle a wide range of temperatures found in industrial environments.
Adaptive Hysteresis
- Hysteresis is 5% of setpoint, allowing closer control than fixed hysteresis switches.
Built-in Mounting Feet
- Simple, two-screw installation allows for secure mounting.
UL/cUL and CE Approved
- Accepted worldwide.
Current Sensing Switch Connections

Notes:
Pressure plate screw terminals.
12-22 AWG solid or stranded.
Field-adjustable setpoint.
DS3 Series Sample Output/Power Supply

Current Sensing Switch Ordering Information
Sample Model Number: DS3-SDT-24U
DS current sensing switch with SPDT relay contacts and 24 VAC/DC power supply. (DIN rail adapters are included)
(1) | (2) | (3) | |||||||
DS | 3 | – | – |
(1) Setpoint Range | |
3 | 2-20, 10-50 and 20-100 A, jumper-selectable |
(2) Output Type | |
SDT | SPDT Relay (Form C) |
NOU | Solid-state N.O. AC/DC |
(3) Power Supply | |
24U | +24 VAC/DC |
12U | +12 VAC/DC |
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