Pulsar AWZ224 Operating instructions

Brand: Pulsar

Model: AWZ224

Category: Power supply units

Type: Operating instructions

Pulsar AWZ224 is a linear power supply unit designed to provide an uninterrupted supply of stabilized voltage of 24V/DC (-/+15%) for equipment that requires it. Due to the linear stabilizing system, the power supply provides voltage with less noise and a shorter time of fault response when compared to a pulse stabilizer. The unit provides the voltage U= 22,0V÷27,6 V DC (20,0V÷27,6 V DC battery assisted operation) and the total output current of I=2,0A.

PSU-B/A-27,6V/L-2A/1/EL-TR-2x7Ah/MC

AWZ 224

v.2.0

Buffer, linear power supply unit.

Installation and operating manual

Edition: from 17

March 2009

Supercedes edition: 1 from the 01

June 2008

09072009

CONTENTS:

1. Technical description.

1.1. General description

1.2. Operation principle

1.3. Block diagram

1.4. Description of elements and power supply connectors

1.5. Technical parameters

2. Installation.

2.1. Requirements

2.2. Installation procedure

3. Indication of power supply operation.

3.1. Optical indication

3.2. Acoustic indication

3.3. Technical outputs

4. Service and operation.

4.1. Startup from the battery

4.2. Discharged battery disconnection

4.3. Dynamic test of battery charge

4.4. Battery charging current limitation

4.5. Battery assisted operation – standby mode

4.6. Power supply unit overload

5. Maintenance.

1. Technical description.

1.1. General description.

Buffer power supply unit is designed for the uninterrupted supply of equipment requiring the stabilized

voltage of 24V/DC (-/+15%). The linear stabilizing system incorporated in the power supply unit provides

voltage with less noise and shorter time of fault response, when compared to a pulse stabilizer. The supply unit

provides the voltage U= 22,0V÷27,6 V DC (20,0V÷27,6 V DC battery assisted operation) and the total

output current of I=2,0A. In case of power voltage failure, the battery supply is automatically switched on. The

power-supply has the following protections: short-circuit (SCP), overload (OLP), overheat (OHP) and overvoltage

(OVP). It is adapted for cooperation with the sealed lead-acid battery (SLA).

The power supply controls automatically the charging and maintenance process of the battery, what is

more it is equipped with the dynamic battery test and its excessive discharge protection (UPV). The power-supply

is also equipped with sound and optical signalization which informs about operation mode (power supply, failures).

It is equipped with two technical outputs (BS, AW) used for the operation manual control (SSWiN, KD).

The power-supply has got a metal casing (RAL 9003 color) with a space for 2x7Ah/12V battery. The casing

features a microswitch indicating door (front) opening.

The power supply unit holds the certificate of conformity to

PN-EN 50131-6:2000

TYPE A, LEVEL 1

Certifying Authority:

Instytut Tele i Radiotechniczny

03-450 Warszawa, ul. Ratuszowa 11

1.2 Operation principle.

AWZ 224 is a stabilized transformer power supply unit with a high line regulation. Line voltage ~230V, is

lowered with the use of transformer and then it is recertified by a rectifier circuit and a low-pass filter. DC output

voltage comes from a line stabilizer. Output voltage is corrected depending on power supply unit operation mode

(charging mode battery maintenance). In case of primary power supply failure, battery supply is launched

uninterruptedly. In battery assisted operation the power supply unit controls battery voltage and when it reaches

20,0V, the electronic circuit disconnects the battery and protects it from damage. After voltage restoration ~230V,

the power supply unit automatically charges and maintains the battery

Power supply unit operation is indicated by two LEDs on the power supply front panel:

•

red LED– failure indication

(in addition the failure may be indicated by an acoustic indication)

• green LED– AC/DC supply indication

Three technical outputs are used for the battery remote control:

• BS- primary power supply control

• AW- failure control

• TAMPER- power supply casing opening control

1.3. Block diagram (fig.1).

Fig.1. Block diagram of the power-supply unit.

1.4. Description of elements and power supply connectors (fig.2, tab.1, tab.2).

Table 1.

No.

[fig.2]

Element description

[1] Acoustic signaling

[2] ZB dip-switch

[3] STOP button

[4] START button

[5] Z1, Z2, Z3, Z4 dip-switches

[6] OUTPUTS battery

[7] RED DIODE optical indication

[8] GREEN DIODE optical indication

[9] CHARGE dip-switch

[10] ~AC~ AC supply connector

[11] OUTPUTS connector (Tab.2)

[12] P1 voltage adjustment

[13] F1 fuse in the battery circuit

[14] 230V – 0V, 230V/AC power supply connection

[15] F2 fuse in the transformer primary circuit

[16]

connector (yellow and green

PE protection connector)

Table 2.

[11] Output description

+ AUX

- AUX

DC +U power supply output

DC 0V (GND) power supply output

AW failure technical output - NC (0V), OC type

BS lack of 230V/AC technical output – NO (HiZ) OC type

TAMPER contact of antisabotage switch - NC

Fig.2. The view of the power-supply unit.

1.3.

Technical parameters

electrical parameters

(tab.3)

- diagram Uout=f (Io) (fig. 3)

mechanical parameters

(tab.4)

operation safety

(tab.5)

Table 3.

Power supply unit type A, level 1

Supply voltage 230V/AC (-15%/+10%)

Supply frequency 50Hz (47÷53Hz)

PSU power P 55W max.

Current consumption 0,45 A max. (5,0 A „cold boot”)

Output voltage

22,0V÷27,6Vdc –

buffer operation

20,0V÷27,6Vdc –

battery assisted operation

Output voltage setting, escalation and keeping time 500ms/150ms/110ms

Voltage setting range 26,0 V÷28,0 V

Voltage adjustment range ± 1%

Ripple voltage 20mV p-p...400mV p-p

Output current 2,0 A max. (level 1=0,69A)

Current consumption by PSU systems 15 mA max.

Battery charging current 450mA max. (@2x7Ah, U bat.=20,0V) (± 5%)

Battery type EUROPOWER EP 7,2-12 x 2szt

Battery charging maximal time 72h

SCP short-circuit protection

200% ÷ 250%

of supply power – limitation of current

and/or fuse failure in the battery circuit (fuse-element

replacement required)

OLP overload protection

110% ÷ 150% (@25ºC÷65ºC)

of power supply – current

limitation with the PTC automatic fuse, manual

restart (disconnection of the DC output circuit)

SCP short-circuit protection in the battery circuit

4A-

current limitation

, F 4A fuse (

failure requires

replacement of the fuse-element)

Overvoltage protection OVP

U>32,0 V output voltage disconnection,

automatically

recovered

U> 29,0 V failure signaling

Excessive discharge protection UVP

U<20,0 V (± 5%) – BAT – terminal disconnection

Technical outputs:

- AW

output indicating the PSU failure

: outputs

(SCP, OCP, OVP activation), battery (UVP, SCP

activation)

- BS

output indicating the power supply failure

- TAMPER

output indicating opening of the power-

supply casing

- OC type, 50mA max. Normal status: level L (0V), failure:

level hi-Z

- OC type, 50mA max. Normal status: level hi-Z, failure:

level L (0V)

- NC contacts (

close casing

0,5A@50V DC (max.)

F1 fuse F 4A

F2 fuse T1 A/ 250V

Table 4.

Casing dimensions

235 x 305 x 98 (WxHxD)

Fixation

205 x 275 x Φ 6 WxH

Battery space 2x7Ah/12V (SLA)

Net/gross weight

3,3/3,5 kg

Casing color

RAL 9003

Closing

Cheese screw

at the front

Notes

The casing is distant from the assembly surface so that cables can be installed

Table 5.

Protection class

PN-EN 60950-1:2004

I (first)

Protection class

PN-EN 60529: 2002 (U)

IP20

Electrical strength of insulation

between input (network) circuit and output circuits of power-supply

between input circuit and PE protection circuit (I/P-FG)

between output circuit and PE protection circuit (O/P-FG)

3000 V/AC min.

1500 V/AC min.

500 V/AC min.

Insulation resistance:

- between input circuit and output or protection circuit

100 MΩ, 500V/DC

Fig.3. Uout=f(Io).

2. Installation.

2.1 Requirements.

The buffer power supply unit is to be assembled by a qualified installer, holding the relevant certificates,

required and necessary in the particular country for connecting (interfering with) the 230 V AC systems and low-

voltage installations The device shall be mounted in closed rooms, according to the environment class I, of the

normal air humidity (RH=90% max. without condensation) and the temperature within the range from +5°C to

+40°C. The power-supply shall operate in a vertical position so that free and convectional air flow through

ventilating holes of the casing is guaranteed.

Prior to beginning the installation, the power supply load balance needs to be prepared. In the normal

course of operation, the sum of currents used up by the consumers may not exceed I=2,0A (P=55W max.)

Including max. battery charging current Ibat=0,45A.

Because the power supply unit is designed for the continuous operation and is not equipped with ON/OFF

switch, the power supply line should have the appropriate overload protection. The user should be informed hot to

disconnect the power supply unit from the mains (usually be means of the separate fuse in the fuse-box). The

power supply installation should conform to the applicable standards and law.

2.2 Installation procedure.

1. Before installation make sure that the mains 230 V is disconnected.

2. Install the power supply at the selected place and evacuate connection wires.

3. Remove the main fuse protecting the transformer primary circuit [15].

4. Connect the supply conductors ~230V to the terminals of the AC 230 V transformer [14]. The earth conductor

should be connected to the terminal marked with the grounding symbol [16]. Three-wire cable should be used for

the connection (the protective conductor in green-and-yellow PE).

The power conductors should be connected to the appropriate terminals on board [14] [16] and properly insulated

Particular care must be taken when making the electric shock protection circuit: yellow-

green protection conductor of the power cable must be connected from one side to the

clamp marked inside the housing of the power supply unit. Operation of the power supply

unit without correctly installed and technically functional electric shock protection circuit is

NOT ALLOWED! This can lead to damage to the equipment and poses risk of electric shock.

5. Connect the conductors of the consumers to terminals +AUX, -AUX of the connection block on the power supply

unit board [11].

6. If necessary, connect the conductors from the equipment (alert central appliance, controller, signaling units,

etc.) to technical outputs [11]:

- BS the output signaling the fault to the 230V.

In the course of the normal operation of the powerpack, the BS technical output is disconnected from the mass

(-AUX), while in the case of the 230 V AC power failure, it is shortened to the mass (-AUX) after the time

determined by the Z1, Z2 [5] switching pieces (Fig. 5).

- AW output signaling faults.

The technical output AW during the normal operation of the power supply unit is shortened to the mass (-AUX),

while in the case of the occurrence of any of the above-mentioned events, the output becomes disconnected from

the mass.

7. With the switching pieces Z3, Z4 [5] determine the time of disconnecting the battery in the case of battery

assisted operation when the voltage on the terminals drops below ~20V.

8. With CHARGE [9] jumper, determine the battery charging current:

Ibat = 0,45A – jumper CHARGE installed

Ibat= 0,90A – jumper CHARGE removed (not allowed for: AWZ110, AWZ224).

9. Switch on the power supply 230V AC and insert the network fuse protecting the primary circuit of the

transformer [15]. Check the optical signaling of the power supply unit operation.

The output voltage of the unloaded power supply unit is U= 27,6V DC.

During battery charging, the voltage may be anywhere between U= 22,0V÷27,6V DC.

10 .Connect the battery in accordance with the indications [6] red = (+), black=(-)

Mount the battery with the use of a band clip 700x 8mm according to the procedure in Fig. 4.

- place the battery inside the casing,

- put the band clip through the left hole A

- put the band clip over the top of the battery

- put the band clip through the hole C

- put the end of the band clip into the clamp

- tighten the band clip with the force 150N-200N

- cut off the excessive part of the band clip.

11. By the means of the STOP [3] pushbutton, enable or disable the battery dynamic test.

Disabling the test will also disable signaling the faults to the battery on the AW output, but will not disable the

system protecting the battery from entire discharging.

12. Perform the power supply unit test: optical signaling [7] [8] (Tab.6), acoustic signaling [1] (Tab.7), technical

outputs through[11]:

- disconnecting the 230V AC power supply: optical and acoustic signaling - immediately, technical

output BS after the time determined by switching pieces Z1, Z2 (Fig.5).

- disconnecting the battery: optical, acoustic signaling, technical output AW - following performing the

battery test (~ 10 min).

13. By the means of the STOP [3] push button, enable or disable the battery dynamic test.

Disabling the test will also disable signaling the fault to the battery on the output.

14. With ZB [2] pins, determine whether the acoustic signaling (Tab.7) is to be enabled (switching piece installed)

or disabled (switching piece removed).

15. Following installing and checking the correctness of operation of the power supply, the enclosure may be

closed.

RED DIODE

• blinking- indication of failure conditions (Tab.6)

GREEN DIODE

• lit- power supply unit operated from 230 V/AC, normal

operation

• blinking- shortage of power supply 230 V/AC,

operation from the battery

Fig.4. Battery installation procedure.

3. Indication of power supply operation.

The device is equipped with optical and acoustic indication of operation. The PSU status can be remotely controlled

by two technical outputs.

3.1 Optical indication.

Number of

blinks

LED FAILURE

Type of failure Causes Remarks

battery damaged

discharged battery, battery

not connected, battery fuse

blown

check the connection and

the fuse of battery

batter discharged

indicates the drop of the

battery voltage to

below 20 V

during operation from

battery

output voltage too

low U < 20V

output overloaded

remove the condition of the

overload and connect after

30 – 60s

output voltage to

high Uout > 29,0V

the voltage stabilizer

damaged, incorrect setting of

trimming potentiometer P1

incorrect setting of trimming

potentiometer P1

overheating of the

power supply unit

board

temperature of PCB board >

120°C

check the sum of loads,

enable casing ventilation

overvoltage

protection

Uout > 32.0V

the voltage stabilizer

damaged

LED high-voltage lit

Table 6.

3.2 Acoustic indication.

The buzzer acoustically indicates the failure conditions. The frequency and number of signals depend on the type

of failure (Tab.7). The acoustic indication can be disabled by the jumper ZB.

No. Description Event

1 signal every 8 s

operation from battery, power supply 230 VAC

shortage

2 signals every 16 s

discharged battery, no battery during operation

from the mains, battery fuse blown

Fast signals during 3s restart of the power supply unit

12 signals battery test disabled

3 signals battery test enabled

Continuous signal

failure, the type of failure indicated by: RED

LED

Table 7.

3.3 Technical outputs.

The power supply unit is equipped with indication outputs informing about the power supply shortage and

failures.

•

AW – failure output: output OC type informing about the failures of the power supply unit

In the normal state, when there is no failures, the output is closed and it opens if a failure occurs.

•

BS- Power supply 230 VAC shortage output : output (OC type) informing about the shortage of

power supply 230 VAC in the normal mode, during the operation from 230 V the output is open, in

case of power supply shortage the output is activated after the time set by jumpers Z1 Z2 (Fig.5)

Figure 5.

4. Service and operation.

4.1. Startup from the battery.

The operation time from battery depends on the capacity, charge level and load current of battery.

• To start the power supply unit from the battery: press and hold START button on the unit board for 5 s.

• To stop the power supply unit from the battery: press and hold STOP button on the unit board for 2 s.

The output will be disabled after about 10 s.

4.2 Discharged battery disconnection.

The power supply unit is equipped with the function disconnecting and informing about the discharge of

the battery. During the operation from the battery, the decrease of the battery voltage to below 20 V enables the

counting of the time for the disconnection of the battery.

The battery disconnection time is set by jumpers Z3, Z4. (Fig.6).

Figure 6.

4.3 Dynamic test of battery charge.

Every 10 minutes the unit executes the battery test by lowering the input voltage and measuring the

voltage on the battery terminals. If the measured voltage is lower than ~24.0V, the failure is indicated.

The battery test can be disabled, for example, when the battery was removed from the power supply unit.

To enable/disable the battery test: Press and hold the STOP button for 3 s during the operation from the

mains. The activation or deactivation of the battery test is indicated as follows (Tab.7).

• test disabled 12 acoustic signals

• test enabled 3 acoustic signals

Note:

• the activation/deactivation of the test is stored even after the disconnection of the unit from

the mains.

• disabling the test will also disable signaling the faults to the battery on the AW output, but

will not disable the system protecting the battery from entire discharging.

4.4 Battery charging current limitation.

The unit is equipped with the function for the limitation of the battery charging current

• Ibat = 0,45A - jumper CHARGE set [9]

• Ibat = 0,90A - jumper CHARGE removed [9]

4.5 Battery assisted operation – standby mode.

To maintain standby mode time, the current form the PSU during the battery assisted operation should be

limited.

Battery 2x7Ah/12V:

- for level 1 (8h) current Id=0,69A

QAKU = 1.25*[(Id + Iz)*Td] – basic formula

where: QAKU – battery capacity [Ah]

1.25 – factor including battery capacity decrease caused by the aging process

Id – used current by consumers during inspection mode [A]

Iz – used current for power supply unit needs [A]

Td – required inspection time [h]

4.6

Power supply unit overload.

The power supply unit is equipped with the output protection with the use of PTC polymer fuse. In case of

power supply unit load with current exceeding 2A (110% ÷ 150%), the output voltage is automatically

disconnected what is indicated by a red diode FAILURE (Tab.6). The load should be disconnected from power

supply unit output for about 1 min.

5. Maintenance.

Any and all maintenance operations may be performed following the disconnection of the PSU from the

power supply network. The PSU does not require performing any specific maintenance measures, however, in the

case of significant dust rate, its interior is recommended to be cleaned with compressed air. In the case of fuse

replacement, only the substitutes in conformity to the original ones are allowed.

WEEE MARK

The used electric and electronic products, do not mix with general household

waste. There are separate collection system for used electric and electronic

products in accordance with legislation under the WEEE Directive and is effective

only with EU

The power supply unit is adapted for cooperation with the sealed lead-acid battery (SLA). After the operation period it must not be thrown but

recycled according to the applicable law.

Pulsar K.Bogusz Sp.j.

Siedlec 150,

32-744 Łapczyca, Polska

Tel. (+48) 14-610-19-40, Fax. (+48) 14-610-19-50

e-mail:

[email protected]

http://

www.

pulsar.pl

WARRANTY

24 months since the sale date, 36 months since the production date.

THE WARRANTY IS VALID ONLY after presenting the invoice of the sale to which the claim refers.

Pulsar AWZ224 Operating instructions

Brand: Pulsar

Model: AWZ224

Category: Power supply units

Type: Operating instructions

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Pulsar AWZ224 Operating instructions

Pulsar AWZ224 Operating instructions

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