MEAN WELL DRS-240 Series 240W All In One Intelligent Security Power Supply Owner’s Manual
- June 8, 2024
- MEAN WELL
Table of Contents
MEAN WELL DRS-240 Series 240W All In One Intelligent Security Power
Supply
QR/CODE
Features
- Universal input 90-305VAC (277VAC available)
- All-in-one function with Power supply, DC-UPS, battery charger and status monitoring in ONE compact unit
- Signal and alarms design meet UL2524, NFPA 1221,BS EN/EN54-4 and GB17945 requirement, with adjustable parameters configurable by communication interface
- Form C relay contacts and LED indicators for AC Fail, Battery Low, Charger Fail, and DC-OK
- Load-dependent high speed battery charging
- Built-in MODBus protocol, CANBus optional
- Protections: Short circuit/Overload/ Over voltage/ Over temperature(auto derating) / Battery reverse polarity (No damage) / Battery cut off
- Battery low protection/ Battery reverse polarity protection 30+70’C wide operating temperature
- Cooling by free air convection
- Can be installed on DIN rail TS-35/7.5 or 15
- Charging curve can be set with SBP-001 (Smart programmer sold separately, please refer to: https://www.meanwell.com/webapp/product/search.aspx?prod=SBP-001)
- 20 100% charging current adjustable by VR
- 2 or 3-stage selectable by DIP S.W
- Suitable for lead acid and lithium-ion batteries
- 3 years warranty
Applications
- Public safety battery back-up (Red box)
- Security system
- Emergency lighting system
- Alarm system
- Uninterruptible DC-UPS system,
- battery detection system
- Central monitoring system
- Industrial automation
GTIN CODE
MW Search: https://www.meanwell.com/service.GTIN.aspx
Description
DRS-240 is a 240W AC/DC DIN rail type security power supply series. In addition to the primary output, there is an additional charger circuit that will automatically adjust charge current depending on the primary output current. DRS-240 accepts the universal input between 90VAC and 305VAC, and supports output 12VDC, 24VDC, 36VDC, and 48VDC nominal systems. With high efficiency up to 92%, it can operate with free air convection cooling under -30’C through 70’Cambient temperature. In addition to the key protection features such as overload protection, over voltage protection, battery low voltage disconnect, and battery reverse polarity protection, the DRS-240 also provides Form-C contacts and LED indicator alarm signals for AC-fail, battery low, charger circuit fail, and DC-OK to allow easy integration into security systems that comply with Iocal alarm codes.
Model Encoding
Block Diagram
Derating Curve
Static Characteristics
Function manual
Alarm signals
- Alarm Signal is sent out through “AC fail “& “Battery low ” &”Charger fail “pins via relay contact.
- An external voltage source is required for this function. The maximum applied voltage is 30Vdc and the maximum sink current is 1A. Please refer to Fig 1.2.
- explains the alarm function built in the power supply
AC fail (Battery low)
DC-UPS function
When AC mains drops below:79-89VAC of 120VAC, 132-187VAC of 220VAC, UPS
function will activate and power source switch battery backup.
Charger setting
2 or 3-stage selectable by DIP S.W
This series provides 2 or3 stage charging curve.
Charging curve can be adjustable by DIP S.W
- 2 stage charging curve
- Default 3 stage charging curve
- Suitable for lead-acid batteries (flooded, Gel and AGM) and Li-ion batteries (lithium iron and lithium manganese).
- Suitable for lead-acid batteries (flooded, Gel and AGM) and Li-ion batteries (lithium iron and lithium manganese).
The default curve is programmable, whereas other pre-defined curves can be activated by the means of the DIP S.W; please refer to the table below and the Mechanical Specification.
Embedded 2 stage charging curve
Embedded 3 stage charging curve
SBP-001 can adjust the charging curves (0nly CANBus Mode l)
- 2 stage charging curve (programmable)
- 3 stage charging curve (programable)
SBP-001 Is a programmer, particularly Tor MEAN WELL’S various programmable battery charger models to program the parameters of charging curves, such as the Constant current (CC), tapper current(TC), Constant voltage (CV), float voltage (FV)and so on, to accommodate the diversified battery specification in industry. With the design accounting for simplicity and convenience, users can easily configure MEAN WELL’s programmable battery chargers with SBP-001 programmer and the computer; all of the setups are able to be finished easily by the means of the specific software.
Note:
- Tapper current(TC) default is 10%, can be fine tuned from 2% to 30% by SBP-001 with computer or CANBus Interface.
- Please contact MEAN WELL for more details.
User Interface
Communication cable for DRS series
DRS series pin assigment
Communication interface
Charging parameters can be modified by MODBus (Built-in) or CANBus(optional)
communication commands. For details, please refer to:
http://www.meanwell.com/manual.html
Power Boost Mode
The maximum current on the load output is the 2 times the rated current for 4
minutes max. and 3 times the rated current for 4 seconds max. For example (48V
model)
Battery temperature compensation
- To exploit the temperature compensation function, please attach the temperature sensor(NTC) which is enclosed with DRS-240, to the battery or the battery’s vicinity.
- DRS-240 is able to work normally without the temperature sensor(NTC).
The compensation parameters included Disable, -3, -4 and -5mV/ C /Cell.lt can be modified by communication command of CANBus, MODBus. The factory default value is -3mV/ C ICell. It will be regarded as normal temperature and will not be compensated when temperature compensation resistance is not connected; And temperature compensation will only compensate lead-acid battery, not lithium iron battery. The range of temperature compensation is 0-40’C, normal temperature 25 C is the central value, no compensation; When the temperature is <0 °C or > 40 °C, the current temperature compensation value will be limited to 0 C or 40C.
24V model as an example
- Assuming that VGoos28.8V, temperature compensation set to -5mV/CICell by communication, TEMP_bat is NTC temperature detection.
- The compensating voltage can be calculated by the following equation:
- Vpoou .com=28.8V-5mV”(TEMP_bat -25°C)*12Cell
- Max. compensation voltage:
- Voont H28.8V-5mV° (0’C-25 C)*12Cell=30.3V
- Min. compensation voltage
- Vs28.8V-5mV”(40 C-25C)12Cell=27.9V
Accessory List
NTC Sensor and mating wire along with DRS-240 (Standard accessory)
LED alarm
Suggested Application
Backup connection for AC interruption Please refer to Fig2.1 for suggested
connection. The power supply charges the battery and provides energy to the
load at the same time when AC mains is OK. The battery starts to supply power
to the load when AC mains fails.
Backup time
Backup time depends on: from the load current from the size of the batteries
The following table is an example (battery capacity at C10 discharge rate).
Mechanical Specification
*Force button Connector (CN1): JS-2008R-42-T or equivalent**
Terminal Pin No. Assignment (RJ45)
Installation Instruction
This series fits DIN rail T$35/7.5 or T$35/15. For installation details, please refer to the Instruction manual. ADMISSIBLE DIN rail:TS35/7.5 OR TS35/15 (For reference only. Not included with unit.)
Installation Manual
Please refer to : http://www.meanwell.com/manual.html
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