All-rounder with safety Data sheet Input: 3 AC 400-500V Output: 24-28V / 490W Power boost up to 600W Separate primary fuse not necessary Switchable operating mode (single/parallel) • Switchable overload behaviour options (Fuse Mode) Type approval acc. to: • IEC / EN60950 • EN50178 Overvolt. cat. III • EN60204 Short description This compact power supply unit is characterised by the variety of possibilities of application and low system costs. The fact that the external fuses are no longer necessary is an advantage as it saves cost and space. The switchable Fuse Mode and the extremely comprehensive approvals package including EN60204 make the SL20.310 the unit of choice. Output voltage At a competitive price, it also offers 25A power boost, output noise suppression, optional Single Mode or Parallel Mode, small dimensions, more than 500,000h MTBF as well as easy installation. The unit can be connected to European and American power supply networks without switching. Ambient temperature range Tamb Operation: 0°C...+70°C (>60°C with Derating) Storage: -25°C...+85°C Input Nominal Input voltage 3 AC 400-500V, ±15% 47-63Hz, suitable for IT power systems DC 24-28V adjustable by (covered) front panel potentiometer, preset: 24.5V ±0.5% Adjusting range guaranteed Output noise suppression Radiated EMI values below EN50081-1, even Silent Switcher ™ when using long, unscreened output cables. Rated continuous loading with convection cooling • Tamb=0°C - 60°C 24.5V/20A (490W) resp. 28V/18A (504W) • Tamb=0°C - 45°C 24.5V/25A (612W) resp. 28V/22A (616W) short-term (<1 min.) also at 60°C admissible Output is protected against short-circuit, open circuit and overload. Input current Inrush current Unit is internally fused (fuse not accessible). For external fusing of unit and for input line protection, use circuit breaker with B-characteristic 10A or slower action, or alternatively T10A HBC fuse. 2-phase operation: Operation is possible even if one phase fails. With high ambient temperature or high load, Pout is adjusted downwards. The red LED is on. Also see Overload Behaviour (overleaf). <2% static, jumper in ’Single Mode’ position <30mVPP (< 0.1%) incl. spikes (20MHz bandw., 50 Ω measurement) Overvolt. protection At 33V ±10%: switch to hiccup mode Power back immunity Rated tolerances • Continuous operat. AC 340...576V resp. DC 450...820V • Please ask for 'application notes' at operation with DC input voltage. Voltage regulation Parallel operation To achieve current sharing: • Plug jumper into pos. 'Output parallel use'. This alters the output V/I characteristic to be 'softer' (25V at 2A, 24V at 20A). The output voltage can still be adjusted. • Missing jumper = 'Single Use', i.e. 'hard' characteristic Transient handling Active transient filter incorporated, so transient resistance acc. to VDE 0160 / W2 (1300V/1.3ms) for all load conditions. Front panel indicator: • Green LED on, when Vout = set output voltage • Red LED on, when Vout < set output voltage (with overload and overtemp. as well as overload with 2-phase op.) • Red LED flashes after switch-off in the Fuse Mode Hold-up time Construction / Mechanics* EN 61000-3-2 (harmonic current emissions [PFC]) is fulfilled Housing dimensions and Weight: • WxHxD 150mm x 124mm x 121mm (+ DIN Rail) • Weight 1.8kg • Recomm. free space for conv. cool.: above/below 70mm, left/right 25mm • All connection blocks are easy to reach as mounted at the front panel • PVC insulated cable can be used for all connections, as the connection blocks are mounted in the cooler area on the underside of the unit. Order information Order number SL20.310 SLZ01 sl20e310 / 030709 Description (Screw mounting set, two needed per unit) 1/2

Data sheet Efficiency, Reliability etc.* typ. 92% Life cycle (electrolytics): The unit exclusively uses longlife electrolytics, specified for +105°C (cf. ’The SilverLine’, p.2). High reliability and lifetime, as • only 4 aluminum electrolytics and • no small aluminum electrolytics are used. 25 Output voltage Vout [V] Start Behaviour Start-up delay Rise time 10 15 20 Output current Iout [A] typ. 0.45s appr. 5-20ms, depending on load Efficiency (typ., @ Vout =24V) Overload Behaviour Two different operating mode options, switchable by plugging the frontpanel OVL-jumper. If the jumper is missing,...