ELC ALF2902M Power Supply Instruction Manual

: June 16, 2024
: ELC

Table of Contents

PRELIMINARY INFORMATIONS
DESCRIPTION
INSTRUCTIONS FOR USE
WORKING
MAINTENANCE
AFTER SALES SERVICE
EU DECLARATION OF CONFORMITY
References
Read User Manual Online (PDF format)
Download This Manual (PDF format)

**ELC ALF2902M Power Supply Instruction Manual

**

ALF2902M POWER SUPPLY INSTRUCTIONS MANUAL

PRELIMINARY INFORMATIONS

Manufacturer : elc 59, avenue des Romains 74000 ANNECY – FRANCE
Phone : +33 (0)4 50 57 30 46 Fax : +33 (0)4 50 57 45 19
Web site : www.elc.fr
Instrument : REGULATED SWITCHING POWER SUPPLY
Brand : elc
Type : ALF2902M

DESCRIPTION

Overview

You have just purchased the ALF2902M elc power supply. We thank you and congratulate you for your choice. This device was manufactured in accordance with
European standard EN 61010-1. This instructions manual contains information and warnings the buyer must comply with in order to ensure safe and sustained operation.
It is intended for professional, industrial or educational uses.

Overall view

Technical features at 23°C at the terminals of the power supply

Output voltage : Adjustable from 5 V to 29 V by 12-positions switch, and fine adjustment.
Switch positions : 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28 V.
Fine adjustement range : ±1V
Total ripple : < 3 mV rms.
Low freq. ripple : < 4 mV peak to peak.
Switching freq. ripple : < 3 mV peak to peak (with bandwidth 20MHz).
Switching peak : < 10 mV peak to peak (with bandwidth 20MHz).
Charge regulation : < 30 mV to 5 V and < 10 mV to 29V for a load change from 0 to 100%
Main regulation : < 1 mV to 29 V/ 2 A and < 4 mV to 5 V / 4 A for 10% line change.
Dynamic regulation : < 1 % to 29 V and < 5 % to 5 V for a load change from 10 to 90%.
Hold-up time : 25 ms for charge 50 % and 12 ms for 100 % mains at 200 V.
Efficiency : >80 % for maximum power (60 W in output).
Output current : 4 A to 5 V, 3,5 A to 12 V, 2,5 A to 24V, 2A to 29V, 4,2A in short-circuit.
Power (D. 1) : linearly changes from 60W to 20W depending on the voltage (29 to 5V)
Protections : against short-circuit by current limiting. against overcurrent by internal fuse

T3.15A.
against source overload by varistor. against battery reverse polarity by output
fuse F1=F5A.
against excessive temperature tripping temperature.

Input voltage : 190 to 264 V 50/60 Hz
Insulation class : II
Electric strenght : 3000 V between input and output
Environmental : of use : + 5 °C to + 40 °C
Conditions storage : -10 °C to + 50 °C
moisture : see diagram (D. 2)
Protection level : IP 30
Safety : EN 61010-1 standard, category ll, pollution degree 2. EN 60335-2-29 standard for lead-acid battery charger function.
EMC standard : EN 55011, group 1, class B. EN 61000-6-1 Aptitude criteria A.
Dimensions : H = 59 mm (70mm with button) L = 106 mm D = 95 mm (100mm with switch)
Weight : 315 g
Presentation : Polycarbonate case with screen printing.
Input voltage : 2 pin socket C8 type for IEC320 C7 cord.
DC output : Safety 4 mm sockets

Accessories of the instrument

Your ALF2902M is delivered with one double insulation cord with 2 poles (CEE 7/16 – CEE 22 C7) and its instructions manual.

INSTRUCTIONS FOR USE

Safety instructions

The instrument must be used according to the instructions of this manual.
Made to be used indoors, do not expose to the rain.
For a natural and correct cooling, the power supply must stand on its four rubber thrusts and all ventilations must be widely cleared.
The plug of the feeding cable being used as the switch off device, the instrument must be connected to a mains socket (230V 50/60Hz) easily accessible
No intervention is authorized inside the casing.
LEAD-ACID BATTERY CHARGER, WARNING :
**** Explosive gas, avoid the flames and sparks. Disconnect the power supply before plugging or unplugging the connectors on the battery. This power supply has switches and relays that can make some sparks, so be sure that the power supply is located in a safe place when charging a battery. Respect the load polarity and voltage of the 12 V or 24V batteries. Do not load non refillable batteries.

WORKING

The green LED “ON” enlightened indicates a voltage output presence.
The red LED “STATUS” enlightened indicates one of two following faults :

The output fuse F1 (5×20 F5A) is off, no output voltage.
The internal temperature of the power supply is too large and temperature protection is activated, the output voltage drops.

The power supply returned to normal operation when the internal temperature will be within the specified range.
The ALF2902M is a regulated and adjusted from 5 to 29 V power supply. Protected,
It can be used in different ways :

4-1Traditional regulated power supply .

Choose the output voltage thanks to the selector and the fine voltage adjustment.
Connect the power supply on main, the green LED lights up.
Connect the charge. If required power is superior to the one that the ALF2902M can supply, a power limitation starts according to diagram 1.

4-2 Lead-acid battery charger 12 V or 24 V.

Compared to the output current of the ALF2902M, for a time of charge of 14 hours, the nominal capacity of the free electrolyte battery is of 35 Ah for 12 V and 20 AH for 24 V.

CAUTION : Before connecting a battery, the power supply must be adjusted on the battery voltage, proceeding like indicated here :

Charging of free electrolyte battery.

Disconnect the battery of your vehicle or instrument.
Connect the ALF2902M on the input voltage, turn the switch ON (I), the green LED lights up.

12 V battery : Place the voltage selector on 14 V.
Turn the adjustment knob in order to light up the yellow LED 12 V. (voltage range : 13,2 to 14,1 V)
24 V battery : Place the voltage selector on 28 V. Turn the adjustment knob in order to light up the yellow LED 24 V. (voltage range : 26,4 à 28,2 V).

Connect a set of silicone insulated leads (CSS100 for example) with a set of insulated alligator clips (JPCI for example.) between the power supply and the battery like indicated here :
Red cord between the positive output (red socket) and the “+” of the battery.
Black cord between the negative output (black socket) and the “-” of the battery.

If the red LED lights up, the battery is connected upside down. In this case, disconnect the power supply from the battery and from the mains, then replace the fuse F1 (5×20 F5A).

Replug the power supply to main, (green and yellow LED light up, red LED is switched off) then plug the battery respecting the polarity. At the beginning of load, if the battery is completely discharged, the yellow LED switch off because the power supply is put in current limitation. Progressively, the voltage is going to increase and the LED is going to enlighten. The power supply works in voltage regulation.

At the end of loading (after 14 hours), stop the power supply and disconnect the set of leads.

Charging of sealed lead-acid batteries
Sealed lead-acid batteries manufacturer recommend not to exceed a load current equal to one third of the nominal current. This is why we recommend not to go under the following capacities : 10 Ah for a 12 V battery and 7 Ah for a 24 V battery.
In any cases, see the instructions manual of the battery’s manufacturer.
For loading, follow the same instructions as for the free electrolyte battery.

4-4 Summary of the LEDS operation

Green LED	Red LED	Yellow LED 12 or 24V	OPERATION
O			Power supply operating
O		Defective output fuse or disjunction temperature
O		O	Compatible output with battery charge 12 or 24V
	O	Absence of mains, charge is supplied by the battery
O	O	O	Power supply under voltage, cut fuse, battery in output

|

| Power supply, out of voltage or in short circuit (Iout = 4,2A)

MAINTENANCE

No particular maintenance is required for this instrument.
Avoid dust, moisture, shocks : your instrument will be grateful for that.
If the green indicator does not light up when switching on, check :

The mains voltage
The connection to mains.
The output fuse «F1» 5×20 F5A if red LED is lighted up.

AFTER SALES SERVICE

During TWO YEARS , spare parts and workmanship are guaranteed. This guarantee does not apply to instrument presenting defects or failures caused by an improper use.
Return expenses are borne by the client. Only devices returned with a dated purchasing invoice can be recovered by the guarantee. Any intervention carried out by unauthorized persons or organizations, shall void the guarantee.

EU DECLARATION OF CONFORMITY

Manufacturer : ELC , 59 avenue des Romains 74000 Annecy FRANCE declares the product
Name : REGULATED SWITCHING POWER SUPPLY (DC power supply)
Type : ALF2902M

conformable to the requirements of the directives :
Low voltage 2014/35/UE, Electromagnetic Compatibility 2014/30/UE and
RoHs 2011/65/UE.

The following harmonized standards have been applied :
Safety : EN 61010-1:2010
EN60335-2-29:2004 + A2:2010
EMC : EN 61326-1:2013

Annecy, January 17, 2022 H. CURRI Manage

ELIMINATION OF MANUFACTURING WASTES BY THE PRIVATE USERS IN THE E

This symbol written in the product or in its packaging indicates that this product must not be throw in the garbage with your other waste.
Its your responsability to rid of your manufacturing wastes bringing it to a specialized sorting office for the recycling of electrical and electronic instruments.
Collection and recycling separated of your wastes will contribute to preserve natural resources and guarantee a recycling respectful of the Environment and human health.
For further information concerning the recycling center near your place of residence, contact your town hall, the elimination service of garbage heap or the store where you bought the instrument.