S series single output switching power siupply

Q: What is the difference between a contactor and a relay?

A contactor is built for switching power circuits repeatedly at high current, often with motor duty ratings (AC-3) and arc-suppressing chambers. A relay switches control signals at low current. In practice: contactor for the motor, relay in the control circuit that drives the contactor coil.

Q: How do I calculate the correct contactor size for a motor?

Use the motor's full-load current, apply the AC-3 rating for the operating voltage, and allow for the number of starts per hour. As a rule of thumb, the contactor's AC-3 rating should be at least equal to the motor FLC, then step up one frame if the duty is heavy.

Q: Do you supply the coil voltage I need?

Coil voltages are specified per order. Send the model number, coil voltage and frequency you require and we will confirm availability and lead time.

Q: Are auxiliary contacts included?

Base models come with the standard auxiliary contact configuration for that frame. Add-on auxiliary blocks and mechanical interlocks can be quoted with the contactor.

About the S series single output switching power siupply

The S series single output switching power siupply is part of the ELEHPD S Series range. Features: High efficiency, high reliability and low cost Switch input voltage range choice 100% full load and machine test Protection characteristics: short circuit/overload SPECIFICATION ELEHPD manufactures and exports low voltage electrical products from Yueqing, Zhejiang, China, supplying distributors, panel builders, M&E contractors and OEM buyers worldwide.

Full catalogue description: S series single output switching power siupply smps with fan 240w 12v 24v 48v 27v

Typical applications

Motor control centres and pump or fan starters
Machine building, conveyors, packaging and CNC equipment
HVAC control panels and building automation
Water treatment, irrigation and pumping stations
Panel retrofits replacing electromechanical control gear

How to specify the right S Series

Size the contact rating for the inductive load, not just the resistive current (AC-3 duty for motors)
Check the coil voltage and frequency available in the panel: 24 V DC, 110 V, 230 V or 400 V AC
Confirm the auxiliary contact count needed for the control and indication circuit
Match the enclosure rating to the environment (IP20 inside a panel, IP65 on the machine)

Specifications

S series single output switching power siupply smps with fan 240w 12v 24v 48v 27v
Features:
High efficiency, high reliability and low cost
Switch input voltage range choice
100% full load and machine test
Protection characteristics: short circuit/overload
SPECIFICATION

240W Single Output Switching Power Supply (SMPS) S-240W

MODEL S-240-5 S-240-12 S-240-15 S-240-24 S-240-27 S-240-48

DC VOLTAGE 5V 12V 15V 24V 27V 48V

RATED CURRENT 40A 18A 15A 10A 8A 5A

CURRENT RANGE 0 ~ 40A 0 ~ 18A 0 ~ 15A 0 ~ 10A 0 ~ 8A 0 ~ 5A

RATED POWER 200W 240W 240W 240W 236W 238W

RIPPLE & NOISE (max. ) 150mVp-p 150mVp-p 180mVp-p 180mVp-p 200mVp-p 240mVp-p

VOLTAGE ADJ. RANGE 4.5 ~ 5.7V 10 ~ 13.2V 13.5 ~ 18V 20 ~ 26.4V 26 ~ 32V 41 ~ 56V

VOLTAGE TOLERANCE ± 2.0% ± 1.0% ± 1.0% ± 1.0% ± 1.0% ± 1.0%

LINE REGULATION ± 0.5% ± 0.5% ± 0.5% ± 0.5% ± 0.5% ± 0.5%

LOAD REGULATION ± 1.0% ± 0.5% ± 0.5% ± 0.5% ± 0.5% ± 0.5%

SETUP, RISE, HOLD TIME 2000ms, 20ms, 24ms at full load

VOLTAGE RANGE 88 ~ 132VAC / 176 ~ 264VAC by switch 248 ~ 370VDC

FREQUENCY RANGE 47 ~ 63Hz

EFFICIENCY (Typ. ) 77% 80% 82% 83% 84% 87%

AC CURRENT 15A/115VAC 30A/230VAC

INRUSH CURRENT (max. ) 18A/115VAC 36A/230VAC

LEAKAGE CURRENT < 3.5mA / 240VAC

OVERLOAD 105 ~ 135% rated output power

Protection type: Hiccup mode, recovers automatically after fault condition is removed.

OVER VOLTAGE 5.75 ~ 6.75V 13.8 ~ 16.2V 18 ~ 21V 27.6 ~ 32.4V 33.7 ~ 39.2V 57.6 ~ 67.2V

Protection type: Hiccup mode, recovers automatically after fault condition is removed.

FAN CONTROL O. T. P. RTH1 ≥ 65º C FAN ON, ≤ 55º C FAN OFF, ≥ 70º C (5 ~ 15V)

RTH1 ≥ 70º C FAN ON, ≤ 65º C FAN OFF, ≥ 80º C (24 ~ 48V)

Protection type: Hiccup mode, recovers automatically after fault condition is removed.

WORKING TEMP. -10 ~ +60º C (Refer to output load derating curve)

WORKING HUMIDITY 20 ~ 90% RH non-condensing

STORAGE TEMP., HUMIDITY -20 ~ +60º C, 10 ~ 95% RH

TEMP. COEFFICIENT ± 0.03%/º C (0 ~ 50º C)

VIBRATION 10 ~ 500Hz, 2G 10min. /1cycle, 60min. each along X, Y, Z axes

SAFETY STANDARDS Design refer to UL1950

WITHSTAND VOLTAGE I/P-O/P: 1.5KVAC I/P-FG: 0.5KVAC O/P-FG: 0.5KVAC

ISOLATION RESISTANCE I/P-O/P, I/P-FG, O/P-FG: 100M Ohms/500VDC

MTBF 188.7K hrs min. MIL-HDBK-217F (25º C)

DIMENSION 215*115*50mm (L*W*H)

PACKING 0.939Kg; 15pcs/13.74Kg/0.0263CMB

Frequently asked questions about the S series single output switching power siupply

What is the difference between a contactor and a relay?

A contactor is built for switching power circuits repeatedly at high current, often with motor duty ratings (AC-3) and arc-suppressing chambers. A relay switches control signals at low current. In practice: contactor for the motor, relay in the control circuit that drives the contactor coil.

How do I calculate the correct contactor size for a motor?

Use the motor's full-load current, apply the AC-3 rating for the operating voltage, and allow for the number of starts per hour. As a rule of thumb, the contactor's AC-3 rating should be at least equal to the motor FLC, then step up one frame if the duty is heavy.

Do you supply the coil voltage I need?

Coil voltages are specified per order. Send the model number, coil voltage and frequency you require and we will confirm availability and lead time.

Are auxiliary contacts included?

Base models come with the standard auxiliary contact configuration for that frame. Add-on auxiliary blocks and mechanical interlocks can be quoted with the contactor.

Related S Series models

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60W Single switching power supply 12v 24v 5v S-60W

S series 12V 24V power supply S-40W

25W Single switching power supply 12v 24v 5v S-25W

SP SERIES SWITCHING POWER SUPPLY WITH PFC FUNCTION SP-500W

50W mostly popular model 12v 24v switching mode power supply

S series single output high voltage with PFC function 800w switching power supply 12V 24V SMPS

240W Single Output Switching Power Supply (SMPS) S-240W
MODEL	S-240-5	S-240-12	S-240-15	S-240-24	S-240-27	S-240-48
DC VOLTAGE	5V	12V	15V	24V	27V	48V
RATED CURRENT	40A	18A	15A	10A	8A	5A
CURRENT RANGE	0 ~ 40A	0 ~ 18A	0 ~ 15A	0 ~ 10A	0 ~ 8A	0 ~ 5A
RATED POWER	200W	240W	240W	240W	236W	238W
RIPPLE & NOISE (max. )	150mVp-p	150mVp-p	180mVp-p	180mVp-p	200mVp-p	240mVp-p
VOLTAGE ADJ. RANGE	4.5 ~ 5.7V	10 ~ 13.2V	13.5 ~ 18V	20 ~ 26.4V	26 ~ 32V	41 ~ 56V
VOLTAGE TOLERANCE	± 2.0%	± 1.0%	± 1.0%	± 1.0%	± 1.0%	± 1.0%
LINE REGULATION	± 0.5%	± 0.5%	± 0.5%	± 0.5%	± 0.5%	± 0.5%
LOAD REGULATION	± 1.0%	± 0.5%	± 0.5%	± 0.5%	± 0.5%	± 0.5%
SETUP, RISE, HOLD TIME	2000ms, 20ms, 24ms at full load
VOLTAGE RANGE	88 ~ 132VAC / 176 ~ 264VAC by switch 248 ~ 370VDC
FREQUENCY RANGE	47 ~ 63Hz
EFFICIENCY (Typ. )	77%	80%	82%	83%	84%	87%
AC CURRENT	15A/115VAC 30A/230VAC
INRUSH CURRENT (max. )	18A/115VAC 36A/230VAC
LEAKAGE CURRENT	< 3.5mA / 240VAC
OVERLOAD	105 ~ 135% rated output power
Protection type: Hiccup mode, recovers automatically after fault condition is removed.
OVER VOLTAGE	5.75 ~ 6.75V	13.8 ~ 16.2V	18 ~ 21V	27.6 ~ 32.4V	33.7 ~ 39.2V	57.6 ~ 67.2V
Protection type: Hiccup mode, recovers automatically after fault condition is removed.
FAN CONTROL O. T. P.	RTH1 ≥ 65º C FAN ON, ≤ 55º C FAN OFF, ≥ 70º C (5 ~ 15V)
RTH1 ≥ 70º C FAN ON, ≤ 65º C FAN OFF, ≥ 80º C (24 ~ 48V)
Protection type: Hiccup mode, recovers automatically after fault condition is removed.
WORKING TEMP.	-10 ~ +60º C (Refer to output load derating curve)
WORKING HUMIDITY	20 ~ 90% RH non-condensing
STORAGE TEMP., HUMIDITY	-20 ~ +60º C, 10 ~ 95% RH
TEMP. COEFFICIENT	± 0.03%/º C (0 ~ 50º C)
VIBRATION	10 ~ 500Hz, 2G 10min. /1cycle, 60min. each along X, Y, Z axes
SAFETY STANDARDS	Design refer to UL1950
WITHSTAND VOLTAGE	I/P-O/P: 1.5KVAC I/P-FG: 0.5KVAC O/P-FG: 0.5KVAC
ISOLATION RESISTANCE	I/P-O/P, I/P-FG, O/P-FG: 100M Ohms/500VDC
MTBF	188.7K hrs min. MIL-HDBK-217F (25º C)
DIMENSION	21511550mm (LWH)
PACKING	0.939Kg; 15pcs/13.74Kg/0.0263CMB