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	170 … 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 = 93/187 V
line frequency	50/60 Hz
line frequency	47 … 63 Hz
input current ● at rated input voltage 120 V ● at rated input voltage 230 V	4.49 A 1.91 A
current limitation of inrush current at 25 °C maximum	60 A
I2t value maximum	5.6 A²·s
fuse protection type	T 6.3 A/250 V (not accessible)
fuse protection type in the feeder	Recommended miniature circuit breaker: from 10 A characteristic C
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	22.8 … 28 V
relative overall tolerance of the voltage	3%
relative control precision of the output voltage ● on slow fluctuation of input voltage ● on slow fluctuation of ohm loading	0.1 % 1 %
residual ripple ● maximum ● typical	150 mV 20 mV
voltage peak ● maximum ● typical	240 mV 160 mV
display version for normal operation	Green LED for 24 V OK
type of signal at output	Relay contact (NO contact, rating 60 V DC/ 0.3 A) for “24 V OK”
behavior of the output voltage when switching on	Overshoot of Vout < 3 %
response delay maximum	0.3 s
voltage increase time of the output voltage ● typical	20 ms
output current ● rated value ● rated range	10 A 0 … 12 A; 12 A up to +45°C; +60 … +70 °C: Derating 3%/K
supplied active power typical	288 W
short-term overload current ● on short-circuiting during the start-up typical ● at short-circuit during operation typical	32 A 32 A
duration of overloading capability for excess current ● on short-circuiting during the start-up ● at short-circuit during operation	1 000 ms 1 000 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	25 W
closed-loop control
relative control precision of the output voltage with rapid fluctuation of the input voltage by +/- 15% typical	0.30%
relative control precision of the output voltage at load step of resistive load 10/90/10 % typical	3%
setting time ● load step 10 to 90% typical ● load step 90 to 10% typical	1 ms 1 ms
protection and monitoring
design of the overvoltage protection	protection against overvoltage in case of internal fault Vout < 33 V
property of the output short-circuit proof	Yes
design of short-circuit protection	Constant current characteristic
response value current limitation	12 … 14.6 A
overcurrent overload capability ● in normal operation	overload capability 150 % Iout rated up to 5 s/min
enduring short circuit current RMS value ● typical	14.6 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 ● typical	3.5 mA 0.8 mA
protection class IP	IP20
EMC
standard ● for emitted interference ● for mains harmonics limitation ● for interference immunity	EN 55022 Class B EN 61000-3-2 EN 61000-6-2
standards, specifications, approvals
certificate of suitability ● CE marking ● UL approval ● CSA approval ● UKCA marking ● EAC approval ● NEC Class 2	Yes Yes; cULus-Listed (UL 508, CSA C22.2 No. 107.1), File E197259; cCSAus (CSA C22.2 No. 60950-1, UL 60950-1) Yes; cULus-Listed (UL 508, CSA C22.2 No. 107.1), File E197259; cCSAus (CSA C22.2 No. 60950-1, UL 60950-1) Yes Yes No
type of certification ● BIS ● CB-certificate	Yes; R-41188271 Yes
MTBF at 40 °C	1 614 510 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 No No No No
standards, specifications, approvals marine classification
shipbuilding approval	Yes
Marine classification association ● American Bureau of Shipping Europe Ltd. (ABS) ● French marine classification society (BV) ● Det Norske Veritas (DNV) ● Lloyds Register of Shipping (LRS)	No Yes Yes No
standards, specifications, approvals Environmental Product Declaration
Environmental Product Declaration	Yes
global warming potential [CO2 eq] ● total ● during manufacturing ● during operation ● after end of life	803.2 kg 20.7 kg 781.8 kg 0.57 kg
ambient conditions
ambient temperature ● during operation ● during transport ● during storage	-25 … +70; with natural convection -40 … +85 -40 … +85
environmental category according to IEC 60721	Climate class 3K3, 5 … 95% no condensation
connection method
type of electrical connection screw terminal ● at input ● at output ● for auxiliary contacts ● for signaling contact	screw terminal L, N, PE: 1 each for 0.5 … 2.5 mm² single-core/finely stranded +, -: 2 screw terminals each for 0.5 … 2.5 mm² Alarm signals: 2 screw terminals for 0.5 … 2.5 mm² 2 screw terminals for 0.5 … 2.5 mm²
mechanical data
width × height × depth of the enclosure	70 × 125 × 120 mm
installation width × mounting height	70 mm × 225 mm
required spacing ● top ● bottom ● left ● right	50 mm 50 mm 0 mm 0 mm
fastening method ● DIN-rail mounting ● S7 rail mounting ● wall mounting	Snaps onto DIN rail EN 60715 35×7.5/15 Yes No No
housing can be lined up	Yes
net weight	0.8 kg
accessories
electrical accessories	Buffer module
mechanical accessories	Device identification label 20 mm × 7 mm, pale turquoise 3RT1900-1SB20