Helios SR250A User manual

Helios Power Solutions www.heliosps.com
User Manual
02/10/2017
Please refer to separate user manual for full SNMP instructions for SR250L and SR250LP models
Refer to last page for customised model codes.
Model Codes: SR250A
SR250D
SR250L
SR250P
SR250LP
= Basic version
= with mains fail and dc low alarms
= with mains fail, dc low, dc high alarms
= with output diode (24V & above) and “D” alarms
= with output diode (24V & above) and “L” alarms
AC/DC power supply/charger with optional communications port
250W
SR250A/D/L/LP

www.heliosps.com Specifications are subject to change without notice. No liability accepted for errors or omissions. 2
Safety
The user is responsible for ensuring that input and output wiring segregation complies with local standards and
that in the use of the equipment, access is confined to operators and service personnel. A low resistance
earth connection is essential to ensure safety and additionally, satisfactory EMI suppression (see below).
HAZARDOUS VOLTAGES EXIST WITHIN A POWER SUPPLY ENCLOSURE AND ANY REPAIRS MUST BE CAR-
RIED OUT BY A QUALIFIED SERVICEPERSON.
Electrical Strength Tests
Components within the power supply responsible for providing the safety barrier between input and output
are constructed to provide electrical isolation as required by the relevant standard. However EMI filtering
components could be damaged as result of excessively long high voltage tests between input, output and
ground. Please contact our technicians for advice regarding electric strength tests.
Earth Leakage
Where fitted, EMI suppression circuits cause earth leakage currents which may be to a maximum of 3.5mA.
Ventilation
High operating temperature is a major cause of power supply failures, for example, a 10oC rise in the operat-
ing temperature of a component will halve its expected life. Therefore always ensure that there is adequate
ventilation for the equipment. Batteries in particular suffer shortened lifetimes if subjected to high ambient
temperatures.
Water / Dust
Every effort must be made in the installation to minimise the risk of ingress of water or dust. Water will almost
always cause instant failure. The effects of dust are slower in causing failure of electronic equipment but all
electrical equipment should be cleaned free of any dust accumulation at regular intervals.
Electromagnetic Interference (EMI)
Switching power supplies and converters inherently generate electrical noise. All wiring should be as short as
practicable and segregated from all equipment wiring which is sensitive to EMI. Residual noise can be re-
duced by looping DC wiring through ferrite cores (sleeves). These are most effective as close to the power
supply as possible and as many turns of the wire taken through the core (+ and - in the same direction) as the
core will accommodate.
External fuse protection
Fuses or circuit breakers must be used in all battery circuits to protect against short circuits. External fuses
should be used for power supplies/ chargers even though they are usually internally protected.
Connection polarity
It is critical to check the polarity carefully when connecting DC devices even with models which have non-
destructive reverse polarity protection.
Glossary of terms used in our user manuals
PSU = power supply unit BCT = battery condition test ECB = electronic circuit breaker
ELVD = electronic low voltage discon-
nect
RPP = reverse polarity protection EMI = electromagnetic interfer-
ence
SNMP = Simple Network Management
Protocol
LAN = local area network DOD = depth of discharge

www.heliosps.com Specifications are subject to change without notice. No liability accepted for errors or omissions. 3
The SR250A/D/L/LP is a AC/ DC power supply or can be used as a float charger for lead acid batteries.
Model codes SR250L… and SR250LP… are available with optional communication ports as follows:
TERMINAL LAYOUT (SR250L.. & SR250LP.. models shown)
It is recommended that all four terminals (2 positive + 2 negative, as shown in the diagram above)
are used when plug in/screw terminals are fitted for the 12V model)
FG - Frame Ground
This terminal provides a connection to the metal case for an earthing point.
Type of port ProtocolModel
Ethernet Web pages + SNMPSR250L/LP….-LAN+
SR250L/LP… -LAN Ethernet Innovative Energies ASCII code
RS232 Innovative Energies ASCII codeSR250L/LP… 232
RS485 Modbus serial or TCP/IP with external Modbus
protocol converter
SR250L/LP… 485
AC INPUT +
-
LOAD
-
+
DC HIGH
COM NC NO
MAINS FAIL
COM NC NO
DC LOW
COM NC NO
FG

www.heliosps.com Specifications are subject to change without notice. No liability accepted for errors or omissions. 4
Power OK: On = Input power present
Off = no input or short circuit on output
DC OK : Steady on = DC output OK
Slow flash = DC output low or battery low (eg. 11, 22, 33, 44V)
Fast flash = DC high (1.2xVnom for PSU, 2.5V/cell for charger)
LED INDICATION CODES
PARALLEL CONNECTION
Two or more SR250L power supplies may be connected in parallel, with or without diodes for in-
creased power, or with output diodes for N+1 redundancy.
Although batteries are not essential it is recommended that they be used so that the communica-
tions continue working in the event of an input power / internal converter failure.
ALARMS
ALARMS
230VAC
METER (optional)
2U RACK
230VAC
SR250L12
-
SR250L12
~
=
~
=
+
+
-

www.heliosps.com Specifications are subject to change without notice. No liability accepted for errors or omissions. 5
DC OK
COM NC NO COM NC NO
L
N
E
SR250LP48XL-LAN+
MAINS FAIL
COM NC NO
ALARMSCOMS
L
N
E
DC HIGH
DC OK
COM NC NO COM NC NO
SR250LP48XL-LAN+
MAINS FAIL
COM NC NO
ALARMSCOMS
DC HIGH
A
V
48V
48V
+
-
+
-
230 VAC
230 VAC
Notes: 1. Set DC HIGH to 50VDC
2. Set DC LOW to 44VDC
Notes: 1. Set DC HIGH to 50VDC
2. Set DC LOW to 44VDC
Built in output diodes for 24V and higher models
(optional communication port shown)

www.heliosps.com Specifications are subject to change without notice. No liability accepted for errors or omissions. 6
 Isolated input to output
 LED indication and standby (off) button
 Optional communication port
 Option of RS232, RS485, Ethernet
 Option of ASCII, Modbus, SNMP
 Three relay alarm outputs
 Industrial quality AC/DC power supply
 Suitable for float charging of lead acid batteries
 Constant current limit
 Precise voltage control
 Temperature compensated output (optional)
 Suitable for parallel operation
 ISO9001 design management system
PHYSICAL
AC input connector
DC Connections
Enclosure
Dimensions
Weight
Indication LEDs
Alarm relay contacts
Standby Mode
ENVIRONMENTAL
Operating
temperature
Storage temperature
Humidity
Cooling
 24 Month Warranty
STANDARDS
EMI
Safety
IEC320 socket
M6 brass studs or plug-in socket with screw
terminals
Zinc plated steel /powder coated lid
150W x 61H x 242D (excl. terminals)
1.7 Kg
Standard: Power OK, Standby
With alarms: DC OK, Power OK, Standby
C - NO - NC changeover rated 1A /50V
DC, 32VAC
Turns off DC output of PSU
Input ▪ standard
▪ option
Fusing
Overcurrent protection
OVP
Thermal protection
Isolation
Efficiency
Inrush current
Output power
Output voltages
Voltage adj. range
Line regulation
Load regulation
Noise
Drift
Hold-up time
ELECTRICAL
180-264 or 88-132V, 45-65Hz (internal link
select)
88 - 135VDC
Input fuse
Constant current limit under overload and
short circuit conditions
Over-voltage protection on output
at ~ 130% of nominal output voltage
Yes, self resetting
1KV DC input - output / earth
> 85%
Soft start circuit
250W
Refer to model table
85 - 115% of Vout
<0.2% over input range
<0.4% open circuit to 100% load
<1%
0.03% / °C
15 - 20 ms without battery
0 - 50 °C ambient at full load
De-rate linearly >50 °C to no load @ 70 °C
-10 to 85 °C ambient
0 - 95% relative humidity non-condensing
24V & above: convection
12V: fan cooled
To CISPR 22 / EN55022 class A
To IEC950 / EN60950 / AS/NZS3260
ACCESSORIES SUPPLIED
Mounting feet together with screws
AC power cord 1.5m with IEC320 socket and NZ/Aust plug
Mating screw-terminal plug for alarm outputs
Crimp lugs for stud terminal versions
DC screw terminal plug-in connector for ‘X’ version
SPECIFICATIONS All specifications are typical at nominal input, full load and at 20°C unless otherwise stated.
AC/DC power supply with 3 alarm relays and optional communication port
SR250L/LP shown
16/09/2016

www.heliosps.com Specifications are subject to change without notice. No liability accepted for errors or omissions. 7
OPTIONS
Temperature
compensated charg-
ing
Alarms:
Alarm Relay Contacts
Internal output diode
(SR250LP..)
Earth Fault Alarm
-4mV / °C / cell , sensor lead length 1.7m
Order Code: +TEMPCO
 Mains fail (or PSU in standby mode)
 DC low (Battery low or PSU low) - set at
92% of nominal voltage.
Special version available: Battery low
alarm operates when mains power is
on, order code: SFMCT-OA v1.1
 DC high
C - NO - NC full changeover rated
1A /50V DC, 32VAC
Incl. alarms & output diode for N+1 redun-
dancy, internal diode not available for
12V models.
Using an external alarm card (see sepa-
rate data sheet)
MODELS
Power Supply Battery Charger
Adjustable
range (V)
Output
Volts
(factory de-
fault)
Output
Current (A)
(continuous)
Output
Volts*
(Charging)
Output
Current (A)
(Charging)
SR250A7.5 7.5 20 6.9 20 (140W) 6.8-8
SR250A12 13.8 18.1 13.8 18.1 11-14
SR250A24 24 10.4 27.6 9.0 22-28
SR250A30 30 8.3 34.5 7.2 28-36
SR250A36 36 6.9 41.4 6.0 34-43
SR250A48 48 5.2 55.2 4.5 45-57
SR250A60 60 4.1 69.0 3.6 54-69
STANDARD MODEL TABLE
* Please specify on ordering if
the unit is to be used for float
charging (except for 12V model
which is set at 13.8V by default).
MODEL IDENTIFICATION CODES
SR250L12 T F S L-485
L = 230V AC + switch Blank = 230V AC no switch
U = 110V AC + switch G = 110V AC no switch
H = 110V DC + switch J = 110V DC no switch
Input voltage and front
panel standby switch
S = Stud X = Plug in /screw terminal block
F = Fan Blank = No fan
T = Yes Blank = No
12, 24, 30, 36, 48, 60
Output DC Connector type:
Fan cooled:
Temperature Compensation
DC output: Nominal voltage
Function
Optional communication
port
Power 250W
250 Watt
AC/DC Stand Alone Power Supply/Float Charger
485 = RS485 232 = RS232
LAN + = Ethernet (SNMP) LAN = Ethernet (ASCII)
Communication port
Protocols
Digital V/I meter
19”rack mount
Wall Mount Enclosure
Choice of RS485, RS232, Ethernet
Note: Requires external battery for commu-
nications to continue working when there is
a loss of input power.
 SNMP v1
 Modbus (external converter)
Serial: +PROTOCONMB
TCP & HTTP: +PROTOCONMB-OE
May be fitted with SR250 in 19” rack,
add: SR-METER or SR-METERV2/SHUNT
Single charger add: SR-RM2U
Dual charger (front removable) add:
SR-RM2U-DUALV2
Charger may be fitted into enclosure with
MCBs and terminals. Code: SEC-SR
OPTIONS (cont.)
A = Basic version
D = with mains fail and dc low alarms
L = with mains fail, dc low, dc high alarms
P = with output diode (24V & above) and “D” alarms
LP = with output diode (24V & above) and “L” alarms

Helios Power Solutions www.heliosps.com
TERMS OF WARRANTY
Helios Power Solutions Ltd warrants this product for 24 months from date of shipment against material and work-
manship defects. Liability under this warranty is limited to the replacement or repair of the defective product as
long as the product has not been damaged through misapplication, negligence, or unauthorized modification or
repair.
CUSTOMISED VERSIONS OF SR250...
Model code BASE MODEL SPECIAL FEATURES
CSR112 SR250L24TXL-LAN+ 5m tempco lead
CSR142 SR250A48XL Front voltage adjustment pot.
CSR151 SR250L24TXL 10m tempco lead