PSU-B/A-13,8V/L-3A/1/EL-TR-17Ah/MC
AWZ 333
v.2.0
Buffer, linear power supply unit.
Installation and operating manual
Edition: 2 from the 17
th
March 2009
Supercedes edition: 1 from the 1
st
June 2008
10062009
2
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 12V/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= 11,0V÷13,8 V DC (U=10,0V÷13,8V DC
battery assisted operation) and the total output current of I=2,75A. 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 17Ah/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
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1.2. Operation principle.
AWZ 333 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 10,0V, 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.
4
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
5
Fig.2. The view of the power-supply unit.
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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 38W max.
Current consumption 0,42 A max. (4,5 A „ cold boot”)
Output voltage
11,0V÷13,8Vdc –
buffer operation
10,0V÷13,8Vdc –
battery assisted operation
Output voltage setting, escalation and keeping time 500ms/150ms/110ms
Voltage setting range 11,0 V÷15,0 V
Voltage adjustment range ± 1%
Ripple voltage 20mV p-p...150mV p-p
Output current 2,75 A max. (level 1= 1,69A)
Current consumption by PSU systems 15 mA max.
Battery charging current 900mA max. (@17Ah, U bat.=10,0V) (± 5%)
Battery type EUROPOWER EP 17-12
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
5A-
current limitation
, F 5A fuse (
failure requires
replacement of the fuse-element)
Overvoltage protection OVP
U>17,0 V output voltage disconnection,
automatically
recovered
U> 14,5 V failure signaling
Excessive discharge protection UVP
U<10,0 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 5A
F2 fuse T 630 mA/ 250V
Table 4.
Casing dimensions
235 x 305 x 98 (WxHxD)
Fixation
205 x 275 x Φ 6 WxH
Battery space 17Ah/12V (SLA)
Net/gross weight
3,4/3,6 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
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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=2,75A (P=38W max.)
Including max. battery charging current Ibat=0,45A or 0,90mA max.
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.
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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 ~10V.
8. With CHARGE [9] jumper, determine the battery charging current:
Ibat = 0,45Amax – jumper CHARGE installed
Ibat= 0,90Amax – 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= 13,8V DC.
During battery charging, the voltage may be anywhere between U= 11V÷13,8V 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 B
- 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.
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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.
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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
3.1 Optical indication.
Number of
blinks
LED FAILURE
Type of failure Causes Remarks
1
battery damaged
discharged battery, battery not
connected, battery fuse blown
check the connection and
the fuse of battery
2
batter discharged
indicates the drop of the
battery voltage to
below 10 V
during operation from
battery
3
output voltage too
low U < 10V
output overloaded
remove the condition of the
overload and connect after
30 – 60s
4
output voltage to
high Uout > 14.5V
the voltage stabilizer
damaged, incorrect setting of
trimming potentiometer P1
incorrect setting of trimming
potentiometer P1
5
overheating of the
power supply unit
board
temperature of PCB board >
120°C
check the sum of loads,
enable casing ventilation
6
overvoltage
protection
Uout > 17.0V
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
1 signal every 8 s
operation from battery, power supply 230 VAC
shortage
2
2 signals every 16 s
discharged battery, no battery during operation
from the mains, battery fuse blown
3
Fast signals during 3s restart of the power supply unit
4
12 signals battery test disabled
5
3 signals battery test enabled
6
Continuous signal
failure, the type of failure indicated by: RED
LED
Table 7.
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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 VAC 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. For example,
the maximum operation time, which is not harmful for the fully charged battery 17 Ah and load current of 3A is
about 5h.
• 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 10 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 ~12.2V, 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.
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Specification for the battery 7Ah/12V:
- for level 1 (8h) current Id=0,69A
Specification for the battery 17Ah/12V:
- for level 1 (8h) current Id=1,69A
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 2.75A (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:
,
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.
/