Product Made In Japan
Manufacturer: Toyo Keiki
Model: DS-5A

Overview

This non-indicating voltage relay detects the voltage of DC power supplies. It can detect both H and L in detected voltage setting ranges, enabling safe operating even with voltages that contain ripples, such as those in rectified power supplies.

Features

Driver adjusts type enables easy and accurate configuration of voltage settings.
Safe operation even for voltages containing ripples.
3 different attachment methods.
Front attachment (attachment to the terminal block or rear connection socket on 8P) Rear attachment

Purposes

Voltage detection in DC power supplies
Voltage detection in rectified power supplies
Automatic control

Specifications

(1) Detection Method
(2) Detected Voltage Rating

Voltage comparison-based voltage detection

Model	Setting Range for Detected Voltage		Series Resistor	Note) Power Consumption (W)		Note
	L	H		Detection Side	Operation Side
DS-5A-24A	20-24V	24-28V	Inside Dimensions	0.2	1.5
DS-5A-48A	40-48V	48-56V		0.4	1.5
DS-5A-100A	80-95V	105-120V	Externally connected for operation	1.1	5.0
DS-5A-U12	1O-14V	10-14V	Both the operation unit and the detection unit are externally attached if the setting range is exceeded	0.1	2.0	Scale of general purpose model is 0*100%
DS-5A-U24A	20-28V	20-28V		0.2	1.5
DS-5A-U48A	40-56V	40-56V		0.5	1.5

Note 1. Power Consumption (operation at maximum voltage on maximum setting, where L = OFF and H = ON)
Note 2. DS-5A-U□ (A) indicates all-purpose model. Be sure to connect a series resistor if the values in this table
will be exceeded. (Calculation method for series resistors can be found on P20.)

(3) Detection Error

Within ±1.5% of upper limit setting maximum voltage value (within ±2.5% for DS-5A-U12).

(4) Set Method

VR variance by driver adjustment.

(5) Contact Capacity

DC 30V/1A (resistance load), AC 100V/1A

(6) Contact Arrangement

L side: 1b, H side: 1a

(7) Relay Contact Output

(8) Retained Range

Within ±1.5% of upper limit setting maximum voltage (within ±2.0% for DS-5A-U12)

(9) Reaction Time

200mS or less when 97% to 110% of set voltage is applied

(10) Operation Frequency

20 times per 60 seconds, 10 minute stop

(11) Overvoltage Strength

(When upper limit setting maximum voltage value is 100%) Continuous overvoltage of 120% possible with all models) 150% possible for 3 minutes on all models; 200% not possible on any models.

(12) Detection Input Ripples

Within 20% P-P

(13) Operating Temperature Limits

Insulation Test  Between Electrical Circuit and Case: DC500V mega 10MΩ or higher
Between Electrical Circuit and Relay Contact: DC500V mega 5MΩ or higher
Voltage Test      Between Electrical Circuit and Case: AC 2000V (50/60Hz per minute)
Between Electrical Circuit and Relay Contact: AC500V (50/60Hz per minute)

(14) Pin Layout Diagram

Outside Dimensions

Attachment Diagram

Series Resistor Calculation Method for General-Purpose Detector Side and Operation Side

(1) Pin Layout Diagram

(2) Calculation Method for RH or RL Series Resistor for Detection Side (Externally Connected)

(A) Reference Current The reference current is indicated as a bond.

Model Name	Reference Current I0 (mA)	Vu (V)
DS-5A-U12	1.75	12
DS-5A-U24A	2.86	24
DS-5A-U48A	3.33	48

(b) Calculation

(c) Example Calculation

Model Name	Set Voltage Range (V)	Vo (V)	Detection Side Multiplier RH or RL Value
DS-5A-U12	22~26	24	(24-12) [V] / 1.75 [mA] =6.86 [kΩ]
DS-5A-U24A	44~52	48	(48-24) [V] / 2.86 [mA] =8.39 [kΩ]
DS-5A-U48A	92~108	100	(100-48) [V] / 3.33 [mA] =15.6 [kΩ]

(3) Calculation Method for R Series Resistor for Operation Power Supply Side (Externally Connected)

Use the equation below to calculate the current I in the input voltage range, then decide on the value for the R series resistor to be connected to the operational power supply.
The current I value is for cases in which both the H and L sides are excited by the load relay of the non-indicating voltage relay (L: OFF, H: ON).

Caution

Model Name	Input Voltage (Voltage of Auxiliary Power Supply) Range E [V] and Resistance Value R of Multiplier on Auxiliary Power Supply Side [kΩ]	Note
DS-5A-U12	80mA ≤ I = E – 6 / R + 0.086 ≤ 140mA	Vz=6V RD=0.086kΩ
DS-5A-U24A	25mA ≤ I = E – 12 / R + 0.4 ≤ 70mA	Vz=12V RD=0.4kΩ
DS-5A-U48A	15mA ≤ I = E – 24 / R + 1.36 ≤ 35mA	Vz=24V RD=1.36kΩ

Emax: Maximum voltage of auxiliary power supply, Imax: Maximum current
Emin: Minimum voltage of auxiliary power supply, Imin: Minimum current
Select R within the range where the above inequality is achieved.
If the inequality is not achieved for I, rework the equation by methods such as raising the R value or narrowing the voltage range of the power supply.
(Note) Settings can be congured in the desired position between 0 and 100% for both H and L.

Scale Drawing

Connection Circuit Diagram of the External Circuits

(1) The detection input and auxiliary power supply input are COM and +.
(2) If the detection input and the auxiliary power supply are the same, connect the auxiliary power supply terminal (7) and the detection input (8) (8 and 2 for U shape) as shown in the diagram below.

(3) If the detection input and the auxiliary power supply are separate, connect them as shown in the diagram below.

Precautions for External Connections

●Do not connect with the polarities of the detection input and auxiliary power supply opposing each other.