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Voltage Sensor

SDV

Overvoltage/Undervoltage Monitoring Relay for AC and DC Input

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last update: June 1, 2022

Single-function Models

Overvoltage or Undervoltage Detection (Switch Selectable)

Model Input
voltage		 Selectable operating range Selectable reset
value range		 Control power supply
SDV-FL[] DC 4 to 240 mV
(4 to 12 mV, 10 to 30 mV, 20 to 60 mV,
40 to 120 mV, 80 to 240 mV)		 2% to 30% (related
to operating value)		 24, 48, 100/110, 125,
200/220 VDC *;
100/110, 200/220/240 VAC
(50/60 Hz)
SDV-FM[] DC or AC
(selectable)		 0.2 to 12 V
(0.2 to 0.6 V, 0.5 to 1.5 V, 1 to 3 V,
2 to 6 V, 4 to 12 V)
SDV-FH[]
SDV-FH[]T		 10 to 300 V
(10 to 30 V, 25 to 75 V, 50 to 150 V,
100 to 300 V)

* Ripple is 5% max. with DC power supplies.

Dual-function Models

Overvoltage and Undervoltage Detection

Model Input
voltage		 Selectable operating range Reset value Control power
supply
Intermediate voltage
of dead band		 Dead band
voltage
SDV-DM[] DC or AC
(selectable)		 0.2 to
12 V		 0.2 to 0.6 V 0.02 to 0.1 V Overvoltage:
(Intermediate voltage of dead
band + dead band voltage) -
(dead band voltage x 2/3) min.
Undervoltage:
(Intermediate voltage of dead
band - dead band voltage) +
(dead band voltage x 2/3) max.		 24, 48, 100/110,
125 VDC;
100/110, 200/220/240
VAC (50/60 Hz)
0.5 to 1.5 V 0.05 to 0.25 V
1 to 3 V 0.1 to 0.5 V
2 to 6 V 0.2 to 1 V
4 to 12 V 0.4 to 2 V
SDV-DH[] 10 to
300 V		 10 to 30 V 1 to 5 V
25 to 75 V 2.5 to 12.5 V
50 to 150 V 5 to 25 V
100 to 300 V 10 to 50 V

Note: 1. Inquire about production of models with 120- and 240-VAC control power supply.
           2. The ripple factor must be 5% or less for DC power supplies.

Ratings

Item SDV-FL[] SDV-FM[] SDV-FH[]/FH[]T SDV-DM[] SDV-DH[]
Allowable continuous
input overvoltage
range		 ±10 VDC ±150 VDC
150 VAC		 ±350 VDC (±500 VDC
for 1 min)
350 VAC (500 VAC for 1
min)		 ±150 VDC
150 VAC		 ±350 VDC (±500 VDC
for 1 min)
350 VAC (500 VAC for 1
min)
Input impedance 1 kΩ 50 kΩ 2,500 kΩ 50 kΩ 2,500 kΩ
Control output SPDT SPST-NO and SPST-NC
Rated load: 5 A at 220 VAC (cosφ = 1), 5 A at 24 VDC (cosφ = 1), 2 A at 220 VAC (cosφ =
0.4), 2 A at 24 VDC (L/R = 7 ms)
Max. contact voltage: 250 VAC, 125 VDC
Max. contact current: 5 A
Max. switching capacity: 1,100 VA (cosφ = 1), 120 W (cosφ = 1), 440 VA (cosφ = 0.4), 48 W
(L/R = 7 ms)
Power consumption DC: 5 W max.; AC: 5 VA max.
Ambient temperature -10 to 55°C (with no icing)
Control supply
voltage *		 24, 48, 100/110, 125, 200/220 VDC; DC operating voltage range: 80% to 130% of control power
supply
100/110/120, 200/220/240 VAC (50/60 Hz); AC operating voltage range: 85% to 110% of
control power supply

* The impedance value is a reference value; actual values may vary.

Characteristics

Item SDV-F[][] SDV-FH[]T SDV-D[][]
Operating value 100% operation for voltage setting
Setting error Operating value: ±2% of operating value
(Percentage of FS voltage)
Reset value: ±7% of reset value
(This is the ratio for the setting value.)		 ±2% of intermediate voltage of dead
band, ±1% of dead band voltage
Operating time 0.5 s max. *
Influence of temperature 0 to 40°C:
±2% max. of operating value
(SDV-FL (operating value range: 4 to 12 mV)
±4% max. of operating value)
-10 to 0°C, 40 to 55°C:
±4% max. of operating value
(SDV-FL (operating value range: 4 to 12 mV)
±8% max. of operating value)		 0 to 40°C:
±2% max. of dead band voltage
-10 to 0°C, 40 to 55°C:
±4% max. of dead band voltage
Influence of control power ±1% max. of operating value
DC operating voltage range: 80% to 130%
AC operating voltage range: 85% to 110%		 ±1% max. of dead band voltage
DC operating voltage range: 80% to 130%
AC operating voltage range: 85% to 110%
Influence of frequency
(Input frequency changed
from 10 to 500 Hz for AC
input)		 ±1% max. of operating value ±1% max. of dead band voltage
Influence of waveform
(For commercial frequency,
single-phase, full-wave AC
input)		 ±3% max. of operating value ±3% max. of dead band voltage
Insulation resistance 10 MΩ min. (at 500 VDC) between the entire electric circuitry and external case, and
between the input terminal and power terminal
Dielectric strength 2,000 VAC for 1 min between the entire electric circuitry and external case, and between
the input terminal and power terminal
Impulse withstand voltage ±1.2 x 50 μs, 4,500 V between the entire electric circuitry and external case
±1.2 x 50 μs, 3,000 V between power terminals
Vibration resistance Destruction: 10 to 25 Hz, 2-mm double amplitude (2G max.) for 2 hrs each in 3 directions
Malfunction: 16.7 Hz, 1-mm double amplitude for 10 min each in 3 directions
Shock resistance Destruction: 294 m/s2 (30G)
Malfunction: 98 m/s2 (10G)
Weight Approx. 290 g Approx. 350 g Approx. 310 g

* Overvoltage: Operation when voltage is changed from 80% to 120% of the operating value.
   Undervoltage: Operation when voltage is changed from 120% to 80% of the operating value.

Timing Function

Item SDV-FH[]T
Setting time 0.5 to 30.0 s *
Operating time accuracy ±5% FS max.
Setting error ±15% FS max.
Reset time 5 s min.
Influence of temperature ±10% FS max.
Operating mode (set via DIP switch) ON-delay, OFF-delay, Startup lock

* The time setting range when the startup lock is selected for the operating mode is approximately 1 to 30 s.

last update: June 1, 2022

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