NK TECHNOLOGIES DS1-FD Series Instructions

Specifi cations
Power Supply 24U =20-28 VAC/DC
Consumption Relay (SPDT) <17mA de-energized
<26mA energized
< 0.75 VA
Setpoint Ranges 20-400A (DC)
17-338A (AC, typical at 60 hertz)
Setpoint Adjust 270° Turn potentiometer (coarse)
270° Turn potentiometer (fi ne)
Dielectric Resistance Working Voltage to 1500 VDC
Frequency Range DC to 400 Hz
Repeatability 0.5%
Hysteresis 5% of setpoint
Sensing Aperture 1.31" (33.3 mm)
Case UL 94-V0 Flammability Rated
Output Rating & Environmental
SDTA
(Automatic Reset) SPDT (Form C) Relay
2A General Purpose @ 125 VAC
2A @ 30 VDC
SDTL
(Latching Reset) SPDT (Form C) Relay
2A General Purpose @ 125 VAC
2A @ 30 VDC
Operating and Storage -20 to 50 DegC (-4 to 122 DegF)
0-95% RH, Non Condensing
Approvals Designed For UL/cUL, CE
For products intended for the EU market, the following is
applicable to the CE compliance of the product:
The DS1-FD series comply with EN 61010-1 CAT III 300Vrms
max. line-to-neutral measurement category. If insulated cable is
used for the primary circuit, the voltage rating of the measure-
ment category can be improved according to the insulation
characteristics given by the cable manufacturer.
Warning! Risk of Danger
Safe operation can only be guaranteed if the
current switch is used for the purpose it has
been designed for and within the limits of the
technical specifi cation. When this symbol is
used, it means you must consult all documen-
tation to understand the nature of potential
hazards and the action required to avoid them.
Warning! Risk of Shock
When operating the current switch, certain
parts of the module may carry hazardous live
voltage (e.g. primary conductor, controlled
load). The switch should not be put into op-
eration if the installation is not complete.
Model Number Key
DS1 - SDTA - 24U - FD
Housing Type
FD Solid Core, DIN or panel mtg.
Power Supply
24U 24VAC/DC
OUTPUT:
SDTA Single Pole Double Throw (SPDT or
Form C) relay, Auto Reset
SDTL Single Pole Double Throw (SPDT or
Form C) relay, Latching
SENSOR TYPE:
DS1 DC current sensing switch with range 20-400 ADC
and adjustable setpoint
Switching Response Time
ON Delay
80 ms max
5% over Setpoint
80 ms max
50% over Setpoint
80 ms max
100% over Setpoint
3511 Charter Park Drive, San Jose, CA 95136
800-959-4014 or +1-408-871-7510 Phone
+1-408-871-7515 FAX
sales@nktechnologies.com, www.nktechnologies.com
INSTRUCTIONS
DS1-FD SERIES
DC Current Operated Switch
Quick "How To" Guide
1. Mount the sensor by snapping onto a DIN rail or
attaching to a panel using the mounting holes.
2. Run the wire you are monitoring through ap-
erture.
3. Connect power & output wiring.
A. Make sure power supply matches specifi cations.
B. Make sure controlled load requires less than the
sensor contact capacity.
4. Adjust Setpoint
A. Turn the Coarse Adjustment fully clockwise.
B. Turn the Fine Adjustment fully counter-clockwise.
C. Energize the monitored load, and set the trip point
by turning the Coarse Adjustment slowly counter-
clockwise until the sensor trips.
D. Leave the adjustment tripped to monitor for under
current conditions, or use the Fine Adjustment to
untrip the output to detect over current conditions.
DS1-FD Inst. Rev1, 07-11-18 P/N 393000107