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		2.34 A
● at rated input voltage 230 V		1.36 A
current limitation of inrush current at 25 °C maximum		40 A
I2t value maximum		1 A²·s
fuse protection type		T 3,15 A/250 V (not accessible)
fuse protection type in the feeder		Recommended miniature circuit breaker: from 6 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		0.1 %
● on slow fluctuation of ohm loading		1 %
residual ripple
● maximum		150 mV
● typical		30 mV
voltage peak
● maximum		240 mV
● typical		140 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		15 ms
output current
● rated value		5 A
● rated range		0 ... 6 A; 6 A up to +45°C; +60 ... +70 °C: Derating 1.6%/K
supplied active power typical		144 W
short-term overload current
● on short-circuiting during the start-up typical		18 A
● at short-circuit during operation typical		18 A
duration of overloading capability for excess current
● on short-circuiting during the start-up		800 ms
● at short-circuit during operation		800 ms
bridging of equipment		Yes
number of parallel-switched equipment resources for increasing the power		2
efficiency
efficiency in percent		88 %
power loss [W]
● at rated output voltage for rated value of the output current typical		16 W
closed-loop control
relative control precision of the output voltage with rapid fluctuation of the input voltage by +/- 15% typical		0.3 %
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		1 ms
● load step 90 to 10% typical		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		6 ... 7.1 A
overcurrent overload capability
● in normal operation		overload capability 150 % Iout rated up to 5 s/min
enduring short circuit current RMS value
● typical		7.1 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		0.4 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, R-41188271
● CB-certificate		Yes
MTBF at 40 °C		1 998 441 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)		Yes
● 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		447.2 kg
● during manufacturing		12.9 kg
● during operation		433.8 kg
● after end of life		0.37 kg
ambient conditions
ambient temperature
● during operation		-25 ... +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		L, N, PE: 1 screw terminal each for 0.5 ... 2.5 mm² single-core/finely stranded
● at output		+, -: 2 screw terminals each for 0.5 ... 2.5 mm²
● for auxiliary contacts		Alarm signals: 2 screw terminals for 0.5 ... 2.5 mm²
● for signaling contact		2 screw terminals for 0.5 ... 2.5 mm²
mechanical data
width × height × depth of the enclosure		50 × 125 × 120 mm
installation width × mounting height		50 mm × 225 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		0.5 kg
accessories
electrical accessories		Buffer module
mechanical accessories		Device identification label 20 mm × 7 mm, pale turquoise 3RT1900-1SB20