MEAN WELL DUPS20 24V/20A DIN Rail Uninterruptible DC-UPS Module

Key Features

Uninterruptible DC-UPS controller
Parallel connection to DC BUS (Power supply + DC-UPS Module + Batteries + Load)
Suitable for 24V systems, up to 20A
2A Battery charging current
Supports 4AH~135AH lead-acid battery capacities
Complete diagnostic and monitoring for DC BUS OK, battery discharge, battery fail
LED indicators for signal status
Protections: Battery reverse polarity protection & Short circuit (internal detection)
Protections: Battery discharge / Over discharge current
Cooling by free air convection
Compact width: 40mm
3 years warranty

Applications

Industrial control systems
Semiconductor fabrication equipment
Factory automation
Electro-mechanical apparatus
Security systems
Emergency lighting
Wireless communication UPS
Central monitoring systems

Product Description

The DUPS20 is a 20A DIN rail type DC-UPS module designed to work with a power supply and an external battery to provide backup power. When AC mains power fails or is interrupted, the load is automatically switched to the battery pack, ensuring continuous operation. The DUPS20 offers fast installation, a small footprint (40mm width), suitability for 24V battery packs of various capacities (4AH~135AH), a 2A battery charging current, and low voltage disconnect for battery protection.

Model Encoding

The model DUPS20 indicates a 24V DC-UPS module with a 20A output current, designed for DIN rail mounting.

Specifications

DC UPS		DUPS20
INPUT	NORMAL INPUT VOLTAGE	24Vdc
	INPUT VOLTAGE RANGE	24 ~ 29Vdc
	RATED CURRENT	20A
	VOLTAGE RANGE	21 ~ 29Vdc
OUTPUT	DISCHARGE CURRENT RANGE	0 ~ 20A
	CHARGING CURRENT	2A
	NORMAL BATTERY VOLTAGE	24Vdc (2 x 12Vdc in series or 1 x 24Vdc)
BATTERY	BATTERY TYPE	Lead-acid battery
	EXTERNAL BATTERY CAPACITIES	4AH ~ 135AH
	BATTERY POLARITY	Protected by internal detection, No Damage, recovers automatically after fault conduction is removed
	SHORT CIRCUIT PROTECTION	This protection only works when batteries are not connected. External fuse is recommended when batteries are connected.
	OVER DISCHARGE CURRENT	21~23A, After 3 sec., unit will cut-off battery discharging by relay
PROTECTION	BATTERY DEEP DISCHARGE	Cut-off battery discharging by relay
PROTECTION	RELAY CONTACT RATINGS (max.)	30VDC/1A resistive load
FUNCTION	DC BUS OK	Relay contact: Short when DC voltage between 21~29V (+/-2%), relay contacts. LED(Green): DC BUS OK: light; DC BUS fail: dark.
FUNCTION	BATTERY FAIL	Relay contact: Short when battery voltage falls below 22V (+/-2%) or battery failure is observed through the battery test function. LED(Red): Battery over-discharge warning or battery broken: light; Battery OK: dark.
	BATTERY DISCHARGE	Relay contact: Short when battery in discharge condition. LED(Yellow): light: Battery discharging; dark: Battery is not discharging or discharging current < 1.0A.
COOLING	Free air convection
ENVIRONMENT	WORKING TEMP.	-30 ~ +70°C (Refer to "Derating Curve")
	WORKING HUMIDITY	5 ~ 95% RH non-condensing
	STORAGE TEMP.	-40 ~ +85°C
	TEMP. COEFFICIENT	+/-0.03%/°C (0 ~ 60°C)
VIBRATION	Component: 10~500Hz, 2G 10min./1cycle, 60min. each along X, Y, Z axes; Mounting: Compliance to IEC60068-2-6
OPERATING ALTITUDE	2000 meters/OVC II
SAFETY & EMC (Note.5)	SAFETY STANDARDS	UL62368-1, EAC TP TC 004 approved
	WITHSTAND VOLTAGE	IP/OP - Chassis: 0.5KVac; IP/OP- Relay: 0.5KVac; Relay - Chassis: 0.5KVac
	ISOLATION RESISTANCE	IP/OP - Chassis, IP/OP- Relay, Relay - Chassis: >100M Ohms / 500Vdc / 25°C/70% RH
EMC EMISSION	Parameter	Standard	Test Level / Note
	Conducted	BS EN/EN55032(CISPR32) Class B
	Radiated
	Voltage Flicker	BS EN/EN55035, BS EN/EN61000-6-2, BS EN/EN61204-3
	Harmonic Current
EMC IMMUNITY	Parameter	Standard	Test Level / Note
	ESD	BS EN/EN61000-4-2	Level 3, 8KV air; Level 2, 4KV contact; criteria B
	Radiated	BS EN/EN61000-4-3	Level 2, 4KV air; Level 1, 2KV contact; criteria A
	EFT/Burst	BS EN/EN61000-4-4	Level 3, 10V/m; criteria A
	Surge	BS EN/EN61000-4-5	Level 3, 2KV; criteria A
	Conducted	BS EN/EN61000-4-6	Level 3, 0.5KV(DC input ports)
	Magnetic Field	BS EN/EN61000-4-8	Level 3, 10V; criteria A
		Level 4, 30A/m; criteria A
MTBF	1252.0K hrs min. (Telcordia SR-332); 482.1K hrs min. (MIL-HDBK-217F @ 25°C)
OTHERS	DIMENSION	40125.2113.5mm (WHD)
OTHERS	PACKING	0.31Kg; 20pcs/7.2Kg/1.16CUFT

Notes:

1. All parameters NOT specially mentioned are measured at normal input (24V), rated load, and 25°C of ambient temperature.
2. The unit tests the battery every 30 seconds. If the test result is faulty, the unit activates the "Battery Fail" relay contact and the "Red LED" indicator.
3. Derating may be needed at higher ambient temperatures. Refer to the "Derating Curve" for details.
4. Ambient temperature derating is 3.5°C/1000m for fanless models and 5°C/1000m for fan models for operating altitudes higher than 2000m (6500ft).
5. The unit is considered a component to be installed into final equipment. All EMC tests were performed by mounting the unit on a 360*720mm metal plate with 1mm thickness. The final equipment must be re-confirmed to meet EMC directives. For guidance on performing these EMC tests, refer to "EMI testing of component power supplies" available at https://www.meanwell.com//Upload/PDF/EMI_statement_en.pdf.

Product Liability Disclaimer: For detailed information, please refer to https://www.meanwell.com/serviceDisclaimer.aspx.

Diagrams and Curves

Block Diagram

Illustrates the functional flow: the Power Supply connects to the DUPS20 module. The DUPS20 manages battery charging and provides DC BUS OK (Green LED), Battery Fail (Red LED), and Battery Discharge (Yellow LED) status indicators. The output of the DUPS20 connects to the Load. The system also includes detection circuits for various functions like battery test.

Derating Curve

A graph showing Load (%) on the vertical axis against ambient temperature (°C) on the horizontal axis. It indicates that the module can operate at 100% load up to a certain temperature, after which derating (reduction in load capacity) is required as the temperature increases.

Buffering Time Table

A table detailing the reference buffering time (in seconds) for different discharge currents (2.5A, 5A, 10A, 20A) and various lead-acid battery capacities (7.5AH, 12AH, 15AH).

Buffering Time Graph

A line graph plotting Buffering Time (s) on the vertical axis against Discharge Current (A) on the horizontal axis. Separate lines represent the buffering performance for 7.5AH, 12AH, and 15AH batteries.

Mechanical Specifications

The DUPS20 module has dimensions of 40mm (width) x 125.2mm (height) x 113.5mm (depth). It is designed for mounting on standard TS35/7.5 or TS35/15 DIN rails. Terminal block assignments are provided for DC input/battery input (TB1) and LED status indicators (TB2).

Suggested Applications

The DUPS20 can be used in two primary configurations:

Backup for AC Interruption: A single 24V/20A Power Supply (PSU) is connected to the DUPS20, which in turn powers the Load and is connected to a 24V Battery. This setup ensures continuous power to the load during AC power outages.
Redundancy with PSU Failure Backup: A redundancy module (DRDN20) is used to combine two PSUs (PSU 1, PSU 2) and connect them to the DUPS20. The DUPS20 then powers the Load and is connected to the 24V Battery. This configuration provides protection against both AC interruptions and individual PSU failures.

Installation Manual

For detailed installation instructions, please refer to the official manual available at: http://www.meanwell.com/manual.html.

GTIN Code Information

For GTIN code information and product search, please visit: https://www.meanwell.com/serviceGTIN.aspx.

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