input
type of the power supply network		1-phase AC
supply voltage at AC		Automatic range selection
supply voltage		120 V/230 V
input voltage 1 at AC		85 ... 132 V
input voltage 2 at AC		176 ... 264 V
wide range input		No
overvoltage overload capability		2.3 × Vin rated, 1.3 ms
buffering time for rated value of the output current in the event of power failure minimum		20 ms
operating condition of the mains buffering		at Vin = 120/230 V
line frequency		50/60 Hz
line frequency		47 ... 63 Hz
input current
● at rated input voltage 120 V		7.5 A
● at rated input voltage 230 V		3.5 A
current limitation of inrush current at 25 °C maximum		11 A
I2t value maximum		10 A²·s
fuse protection type		T 10 A (not accessible)
fuse protection type in the feeder		Recommended miniature circuit breaker: from 10 A characteristic C or circuit-breaker 3RV2411-1JA10 (120 V) or 3RV2411-1FA10 (230 V)
output
voltage curve at output		Controlled, isolated DC voltage
output voltage at DC rated value		24 V
output voltage
● at output 1 at DC rated value		24 V
output voltage adjustable		Yes; via potentiometer
adjustable output voltage		24 ... 28 V; max. 480 W
relative overall tolerance of the voltage		3 %
relative control precision of the output voltage
● on slow fluctuation of input voltage		0.5 %
● on slow fluctuation of ohm loading		1 %
residual ripple
● maximum		150 mV
voltage peak
● maximum		240 mV
display version for normal operation		Green LED for 24 V OK
type of signal at output		Relay contact (NO contact, rating 50 V DC/ 0.3 A) for "24 V OK"
behavior of the output voltage when switching on		No overshoot of Vout (soft start)
response delay maximum		1.5 s
voltage increase time of the output voltage
● typical		50 ms
● maximum		500 ms
output current
● rated value		20 A
● rated range		0 ... 20 A; 24 A up to +45°C; +60 ... +70 °C: Derating 5%/K
supplied active power typical		480 W
short-term overload current
● on short-circuiting during the start-up typical		35 A
● at short-circuit during operation typical		35 A
duration of overloading capability for excess current
● on short-circuiting during the start-up		100 ms
● at short-circuit during operation		100 ms
bridging of equipment		Yes
number of parallel-switched equipment resources for increasing the power		2
efficiency
efficiency in percent		90 %
power loss [W]
● at rated output voltage for rated value of the output current typical		53 W
closed-loop control
relative control precision of the output voltage with rapid fluctuation of the input voltage by +/- 15% typical		1 %
relative control precision of the output voltage load step of resistive load 50/100/50 % typical		3 %
setting time
● maximum		10 ms
protection and monitoring
design of the overvoltage protection		Yes, according to EN 60950-1
property of the output short-circuit proof		Yes
design of short-circuit protection		Electronic shutdown, automatic restart
● typical		21 A
overcurrent overload capability
● in normal operation		overload capability 150 % Iout rated up to 5 s/min
enduring short circuit current RMS value
● maximum		7 A
safety
galvanic isolation between input and output		Yes
galvanic isolation		Safety extra-low output voltage Uout acc. to EN 60950-1 and EN 50178
operating resource protection class		Class I
leakage current
● maximum		3.5 mA
● typical		1 mA
protection class IP		IP20
EMC
standard
● for emitted interference		EN 55022 Class B
● for mains harmonics limitation		EN 61000-3-2
● for interference immunity		EN 61000-6-2
standards, specifications, approvals
certificate of suitability
● CE marking		Yes
● UL approval		Yes; cULus-Listed (UL 508, CSA C22.2 No. 107.1), File E197259; cCSAus (CSA C22.2 No. 60950-1, UL 60950-1)
● CSA approval		Yes; cULus-Listed (UL 508, CSA C22.2 No. 107.1), File E197259; cCSAus (CSA C22.2 No. 60950-1, UL 60950-1)
● UKCA marking		Yes
● EAC approval		Yes
● NEC Class 2		No
type of certification
● BIS		Yes; R-41183539
● CB-certificate		Yes
MTBF at 40 °C		1 778 916 h
standards, specifications, approvals hazardous environments
certificate of suitability
● IECEx		No
● ATEX		No
● ULhazloc approval		No
● cCSAus, Class 1, Division 2		No
● FM registration		No
standards, specifications, approvals marine classification
shipbuilding approval		Yes
Marine classification association
● 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 Declaration		Yes
global warming potential [CO2 eq]
● total		1 707.2 kg
● during manufacturing		47.4 kg
● during operation		1 658.2 kg
● after end of life		0.72 kg
ambient conditions
ambient temperature
● during operation		0 ... 70 °C; with natural convection
● during transport		-40 ... +85 °C
● during storage		-40 ... +85 °C
environmental category according to IEC 60721		Climate class 3K3, 5 ... 95% no condensation
connection method
type of electrical connection		screw terminal
● at input		L1, N, PE: 1 screw terminal each for 0.2 ... 4 mm² single-core/finely stranded
● at output		+, -: 2 screw terminals each for 0.2 ... 4 mm²
● for auxiliary contacts		13, 14 (alarm signal): 1 screw terminal each for 0.14 ... 1.5 mm²
mechanical data
width × height × depth of the enclosure		115 × 145 × 150 mm
installation width × mounting height		120 mm × 245 mm
required spacing
● top		50 mm
● bottom		50 mm
● left		0 mm
● right		0 mm
fastening method		Snaps onto DIN rail EN 60715 35x7.5/15
● DIN-rail mounting		Yes
● S7 rail mounting		No
● wall mounting		No
housing can be lined up		Yes
net weight		2.4 kg
accessories
electrical accessories		Buffer module
mechanical accessories		Device identification label 20 mm × 7 mm, pale turquoise 3RT1900-1SB20