78 Series - Switch mode power supplies Features 78.12....2400 78.12....1200 78.36 Range of modular DC power supplies High efficiency (up to 91%) Low (< 0.4 W) stand-by power absorption * Thermal protection: internal, with Vout shutdown * Short circuit protection: hiccup (auto-recovery) mode * Input protection: replaceable internal fuse plus spare (78.36) * Overvoltage protection: varistor * Flyback topology * Compliant to EN 60950-1 and EN 61204-3 * Parallel working for automatic redundancy: with OR-IN diode * Dual and series connection permissible * Small dimensions: 17.5 mm (1 module) or 70 mm (4-modules) wide, 60 mm deep * 35 mm rail (EN 60715) mount * * * 24 V DC, 12 W output * 12 V DC, 12 W output * 24 V DC, 36 W output Screw terminal * ** *** **** For outline drawing see page 8 (see diagrams L78) peak to peak, 100 Hz component, with 100 V AC input 88...100 V AC with output current limited to 80 % IN (see derating diagrams P78) Output specification Output current (-20...+40C, 230 V AC input) A 0.63 1.25 1.7 Rated current IN (50C, full input operating range)A 0.50 1 1.5 Rated voltage V 24 12 24 Rated power W 12 12 36 Output power (-20...+40C, 230 V AC input) W 15 15 40 Peak current capability for 3 ms * A 2 3 8 Output voltage adjust V -- -- -- Voltage variation (from no-load to full-load) <1% <1% <1% < 200 < 200 < 200 Hold-up time@full load: with 100 V AC input ms < 10 < 10 < 20 with 260 V AC input ms < 90 < 90 < 100 110...240 110...240 110...240 Voltage ripple @ full load ** mV Input specification Nominal voltage (UN) V AC (50/60 Hz) V DC (not polarized) Operating range V AC (50/60 Hz) V DC 220 220 220 100...265*** 100...265*** 100...265*** 140...370 140...370 140...370 Max power absorption VA 28.2 32 57.5 (@ 100 V AC, 50 Hz) W 14.2 17.2 43 Stand-by power absorption W < 0.4 < 0.4 < 0.4 0.50 0.53 0.74 Power factor 0.25 0.30 0.6 Max. inrush current (peak @ 265 V) for 3 ms A 10 10 12 Replaceable protection fuse -- -- 1A-T Max current absorption (@ 88 V AC) A Technical data Efficiency (@ 230 V AC) % 85 87 86 MTTF H > 400.000 > 400.000 > 600.000 XII-2012, www.findernet.com Start-up delay s Dielectric strength between input/output V AC Dielectric strength between input/PE Ambient temperature range **** Protection category V AC C <1 <1 <1 2,500 (class II) 2,500 (class II) 3,000 (class II) -- -- -- -20...+60 -20...+60 -20...+70 IP 20 IP 20 IP 20 Approvals (according to type) 1 78 Series - Switch mode power supplies Features 78.60 78.50 Range of modular DC power supplies High efficiency (up to 91%) Low (< 0.4 W) stand-by power absorption * Thermal protection: internal, with Vout shutdown * Short circuit protection: hiccup (auto-recovery) mode * Overload protection: fold-back mode (78.50 only) * Input protection: replaceable internal fuse plus spare * Overvoltage protection: varistor * Flyback topology * ZVS (Zero-voltage-switching), quasi-resonant mode technology * Compliant to EN 60950-1 and EN 61204-3 * Parallel working for automatic redundancy: with OR-IN diode * Dual and series connection permissible * Small dimensions: 70 mm (4-modules) wide, 60 mm deep * 35 mm rail (EN 60715) mount * * * 24 * 12 * Voltage V DC, 60 W output regulation 24-28V * ZVS technology * Voltage V DC, 50 W output regulation 12-15V * ZVS technology * Suitable for battery charging Screw terminal * (see diagrams L78) ** peak to peak, 100 Hz component, with 100 V AC input *** (see derating diagrams P78) For outline drawing see page 8 Output specification Output current (-20...+40C, 230 V AC input) A 2.8 4.6 Rated current IN (50C, full input operating range)A 2.5 4.2 Rated voltage V 24 12 Rated power W 60 50 Output power (-20...+40C, 230 V AC input) W 68 55 Peak current capability for 3 ms * A 10 12 Output voltage adjust V 24...28 12...15 Voltage variation (from no-load to full-load) Voltage ripple @ full load ** mV Hold-up time@full load: with 100 V AC input ms with 260 V AC input ms <1% <1% < 200 < 200 < 20 < 30 < 130 < 150 110...240 110...240 Input specification Nominal voltage (UN) V AC (50/60 Hz) V DC (not polarized) Operating range V AC (50/60 Hz) 220 220 88...265 88...265 140...370 140...370 Max power absorption VA 90 89 (@ 100 V AC, 50 Hz) W 67.5 58.3 Stand-by power absorption W < 0.4 < 0.4 0.75 0.65 A 0.9 0.85 Max. inrush current (peak @ 265 V) for 3 ms A 30 30 1.6 A - T 1.6 A - T V DC Power factor Max current absorption (@ 88 V AC) Replaceable protection fuse Efficiency (@ 230 V AC) % 91 90 MTTF H > 500.000 > 400.000 Start-up delay s <1 <1 Dielectric strength between input/output V AC 3,000 (class II) 3,000 (class II) Dielectric strength between input/PE 1,500 (class I) 1,500 (class I) -20...+70 -20...+70 IP 20 IP 20 Ambient temperature range *** Protection category Approvals (according to type) 2 V AC C XII-2012, www.findernet.com Technical data 78 Series - Switch mode power supplies Ordering information Example: 78 series switching power supply, 36 W 24 V DC output, supply voltage 110...240 V AC, replaceable fuse. A B C D 7 8 . 3 6 . 1 . 2 3 0 . 2 4 0 1 D: 0 = Standard 1 = Replaceable fuse 3 = Replaceable fuse + output voltage regulator Series Power 12 = 12 36 = 36 50 = 50 60 = 60 W W W W output output output output C: 0 = Standard Voltage conversion 1 = AC input, DC output AB: 12 = 12 V output 24 = 24 V output Input voltage 230 = 110...240 V AC Codes 78.12.1.230.1200 78.12.1.230.2400 78.36.1.230.2401 78.60.1.230.2403 78.50.1.230.1203 Technical data EMC specifications (according to EN 61204-3) Reference standard Electrostatic discharge contact discharge EN 61000-4-2 air discharge EN 61000-4-2 8 kV 8 kV 80 ... 1,000 MHz EN 61000-4-3 6 V/m 10 V/m 1 ... 2.8 GHz EN 61000-4-3 3 V/m 3 V/m (burst 5/50 ns, 5 and 100 kHz) on supply terminals EN 61000-4-4 2 kV 3 kV Voltage pulses on supply terminals common mode EN 61000-4-5 2 kV 2 kV (surge 1.2/50 s) differential mode EN 61000-4-5 2 kV (78.12), 4 kV* (78.36) 4 kV * Radiated electromagnetic field 78.12, 78.36 78.60, 78.50 4 kV 4 kV Fast transients Radio-frequency common mode voltage (0.15...230 MHz) on supply terminals Short interruptions EN 61000-4-6 EN 61000-4-11 6V 10 V 5 cycles 6 cycles Radio-frequency conducted emissions 0.15...30 MHz EN 55022 class B class B Radiated emissions 30...1,000 MHz EN 55022 class B class B Terminals Max. wire size Screw torque Wire strip length solid cable stranded cable mm2 1 x 4 / 2 x 2.5 1 x 4 / 2 x 2.5 AWG 1 x 12 / 2 x 14 1 x 12 / 2 x 14 Nm 0.8 mm 9 Other data Power lost to the environment without output current W 0.4 with rated output current W 2 (78.12), 5 (78.36, 78.50), 5.4 (78.60) XII-2012, www.findernet.com * input fuse may blow for surges higher than 1.5 kV 3 78 Series - Switch mode power supplies Output specification P78-1 Output peak current v time (78.12) L78-2 Output current v ambient temperature (78.36) P78-2 Output peak current v time (78.36) L78-3 Output current v ambient temperature (78.60) P78-3 Output peak current v time (78.60) L78-4 Output current v ambient temperature (78.50) P78-4 Output peak current v time (78.50) XII-2012, www.findernet.com L78-1 Output current v ambient temperature (78.12) 4 78 Series - Switch mode power supplies Hiccup mode Current Overload current Load current Time Under normal conditions, the 78 Series Power Supply supplies the current required by the load. However, under abnormal conditions such as a short circuit or heavy overload (T0) the output voltage will be rapidly reduced to zero - followed by the current (T1). After approximately 2 seconds (T1 to T2), the power supply checks for the persistence of the anomaly over the time period T2 to T3 (30 to 100ms - dependent on the type of anomaly). If the anomaly persists, as shown above, the current is again reset to 0 A for a further 2 s (T3 to T4). This "hiccup" process is repeated until the anomaly is removed (Tn), whereon the power supply then returns to normal working. Fold-back mode (78.50 only) XII-2012, www.findernet.com Under normal conditions, the 78.50 supplies the current required by the load. In case of heavy overload (up to 110 W / 9.2 A), the fold-back circuit will limit the output current linearly as output voltage decreases, in accordance to the diagram above. In practice, when overcurrent is drawn by the load, the fold-back circuit reduces both the output voltage and current to well below the normal operating limits. In case of short circuit, the power supply will work in hiccup mode. Both these conditions end when the anomaly is removed, whereon the power supply then returns to normal working. The fold-back mode allows to use the 78.50 power supply as a battery charger, particularly for charging lead batteries rated 15...20 Ah. It is suggested to insert a diode in series between the + output and the + input of the battery (if not already installed in the battery unit). 5 78 Series - Switch mode power supplies Wiring diagrams Dual connection Dual connection * * * Not for 78.36 Series connection Series connection * * * Not for 78.36 XII-2012, www.findernet.com Parallel connection (78.50 only) 6 78 Series - Switch mode power supplies Application example: redundancy connection Manual * Automatic (with parallel connection) * * * * Not for 78.36 * Not for 78.36 Note: Since parallel working is intended to provide automatic redundancy, rate the load current at no more than In. Diode(s) Heat-sink or metal panel Heat-sink or metal panel Insulating sheet Insulating sheet or e.g. XII-2012, www.findernet.com e.g. 7 78 Series - Switch mode power supplies Outline drawings 78.12 Screw terminal 78.36 Screw terminal 78.50 / 78.60 Screw terminal Accessories Sheet of marker tags, plastic, 72 tags, 6x12 mm 060.72 Identification tag, plastic, 1 tag, 17x25.5 mm 019.01 060.72 XII-2012, www.findernet.com 019.01 8