General information
product brand nameSITOP
product type designationPSU400M
product designationPower supply SITOP modular
type of current supply24 V/20 A
input
type of the power supply networkDC voltage
voltage curve at inputDC
supply voltage at ACstartup from 340 V DC; derating necessary at 300 ... 400 V DC and 824 ... 900 V DC
supply voltage at DC600 V
input voltage at DC300 ... 900 V
overvoltage overload capabilityShutdown at Vin > 900 V DC
at rated input voltage 600 V0.85 A
current limitation of inrush current at 25 °C maximum8 A
I2t value maximum0.02 A²·s
fuse protection typeyes, cut-off capacity 20 kA; L/R < 2 ms ("+" and "-" input)
output
voltage curve at outputControlled, isolated DC voltage
product function output voltage controlledYes
product function output voltage stabilizedYes
output voltage at DC rated value24 V
at output 1 at DC rated value24 V
at output 1 at DC24 V
output voltage adjustableYes; via potentiometer
adjustable output voltage24 ... 28.8 V; max. 480 W
relative overall tolerance of the voltage3 %
on slow fluctuation of input voltage0.3 %
on slow fluctuation of ohm loading0.3 %
maximum150 mV
typical30 mV
maximum200 mV
typical100 mV
display version for normal operationGreen LED for 24 V OK, green flashing LED for start delay
type of signal at outputRelay contact (NO contact, rating 60 V DC/ 0.3 A; 30 V DC/1 A) for 24 V OK
behavior of the output voltage when switching onNo overshoot of Vout (soft start)
response delay maximum0.1 s; 10 s adjustable using switch
maximum150 ms
rated value20 A
rated range0 ... 20 A; +60 ... +70 °C: Derating 5.5%/K
supplied active power typical480 W
on short-circuiting during the start-up typical40 A
at short-circuit during operation typical60 A
on short-circuiting during the start-up150 ms
at short-circuit during operation25 ms
on short-circuiting during the start-up typical23 A
bridging of equipmentYes; switchable characteristic
number of parallel-switched equipment resources for increasing the power2
efficiency
efficiency in percent95 %
at rated output voltage for rated value of the output current typical25 W
closed-loop control
relative control precision of the output voltage with rapid fluctuation of the input voltage by +/- 15% typical1.5 %
relative control precision of the output voltage load step of resistive load 50/100/50 % typical1.5 %
load step 50 to 100% typical1 ms
load step 100 to 50% typical1 ms
maximum5 ms
protection and monitoring
design of the overvoltage protection< 33 V
property of the output short-circuit proofYes
design of short-circuit protectionAlternatively, constant current characteristic approx. 22 A or latching shutdown
typical22 A
in normal operationoverload capability 150 % Iout rated up to 5 s/min
typical22 A
display version for overload and short circuitLED yellow for "overload", LED red for "latching shutdown", red LED flashing for "Overtemperature"
safety
galvanic isolation between input and outputYes
galvanic isolationOutput voltage: PELV (IEC 61010-2-201)
operating resource protection classClass I
protection class IPIP20
EMC
for emitted interferenceEN 55022 Class A (emission)
for mains harmonics limitation-
for interference immunityEN 61000-6-2
standards, specifications, approvals
CE markingYes
UL approvalYes; cULus-Listed (UL 508, CSA C22.2 No. 107.1), File E197259
UKCA markingYes
EAC approvalYes
Regulatory Compliance Mark (RCM)Yes
NEC Class 2No
CB-certificateYes
MTBF at 40 °C622 277 h
standards, specifications, approvals hazardous environments
IECExNo
ATEXNo
ULhazloc approvalNo
FM registrationNo
standards, specifications, approvals marine classification
shipbuilding approvalYes
American Bureau of Shipping Europe Ltd. (ABS)No
French marine classification society (BV)No
Det Norske Veritas (DNV)Yes
Lloyds Register of Shipping (LRS)No
standards, specifications, approvals Environmental Product Declaration
Environmental Product DeclarationYes
total662.4 kg
during manufacturing28.7 kg
during operation633.1 kg
after end of life0.24 kg
ambient conditions
during operation-25 ... +70 °C; with natural convection
during transport-40 ... +85 °C
during storage-40 ... +85 °C
environmental category according to IEC 60721Climate class 3K3, 5 ... 95% no condensation
connection method
type of electrical connectionscrew terminal
at inputDC input, +, -, PE: 1 screw terminal each for 0.2 ... 6/4 mm² single-core/finely stranded
at output+, -: 2 screw terminals each for 0.2 ... 6/4 mm² single-core/finely stranded
for auxiliary contactsAlarm signals: 2 screw terminals for 0.14 ... 1.5 mm² single-core/finely stranded
mechanical data
width × height × depth of the enclosure90 × 125 × 125 mm
installation width × mounting height90 mm × 225 mm
top50 mm
bottom50 mm
left0 mm
right0 mm
fastening methodSnaps onto DIN rail EN 60715 35x7.5/15
DIN-rail mountingYes
S7 rail mountingNo
wall mountingNo
housing can be lined upYes
net weight1.2 kg
accessories
mechanical accessoriesDevice identification label 20 mm × 7 mm, pale turquoise 3RT1900-1SB20
additional information
other informationSpecifications at rated input voltage and ambient temperature +25 °C (unless otherwise specified)
Approvals Certificates
global warming potential [CO2 eq] / during manufacturing28.7 kg
global warming potential [CO2 eq] / during operation633.1 kg
global warming potential [CO2 eq] / after end of life0.24 kg
global warming potential [CO2 eq] / total662.4 kg