Industrial Environment Switching Regulators 19" PSR: Positive Switching Regulators PSL-Family PSL-Family No input to output isolation Single output of 5.1, 12, 15, 24 or 36 V DC/51...288 W Input voltage up to 80 V DC * High efficiency up to 94 % * Wide input voltage range * Low input-to-output differential voltage * Very good dynamic properties * * * * Input undervoltage cut-out External output voltage adjustment and inhibit Continuous no-load and short-circuit proof No derating Safety according to IEC 950 5.2 C Table of Contents Page Type Survey .............................................................. 5 - 37 Description ................................................................ 5 - 37 Safety and Installation Instructions ........................... 5 - 38 Immunity to Environmental Conditions ...................... 5 - 39 Electromagnetic Compatibility EMC .......................... 5 - 40 Characteristics and Definitions .................................. 5 - 41 Electrical Input and Output Data ............................... 5 - 42 Standard Features .................................................... 5 - 44 Description of Options ............................................... 5 - 44 Mechanical Data ....................................................... 5 - 46 Type Key and Product Marking ................................. 5 - 47 Type Survey Table 1: Type survey 1 Nominal output voltage Uo nom Nominal output current I o nom Input voltage range Ui 1 Nominal input voltage Ui nom Efficiency Type designation Options Superseded old type (phase-out) 5.1 V 12 A 7...40 V 20 V 83% PSL 5A12-7R -9, L, i, P, C, D, A PSR 512E-7 5.1 V 10 A 8...80 V 40 V 76% PSL 5A10-7R PSR 510E-7 12 V 8A 15...80 V 89% PSL 128-7R PSR 128E-7 15 V 19...80 V 90% PSL 158-7R PSR 158E-7 24 V 29...80 V 50 V 92% PSL 248-7R PSR 248E-7 36 V 42...80 V 60 V 94% PSL 368-7R PSR 368E-7 See data Uio min (min. differential voltage Ui - Uo) Description The PSL family of positive swiching regulators is designed as power supply modules for electronic systems. Their major advantages include a high level of efficiency that remains virtually constant over the entire input range, high reliability, low ripple and excellent dynamic response. Modules with input up to 80 V are specially designed for secondary switched and battery driven applications. Case L04: Aluminium, black finish and self cooling. Edition 2/96 - (c) Melcher AG External input circuitry An external capacitor (see "Application Notes") is required in rectifier mode and in DC operation mode only, if the sum of the lengths of the two input lines between source and input (without option L) is greater than approx. 5 m. For long connection lines the use of option L is recommended in order to reduce superimposed interference voltages or currents and to prevent oscillation. MELCHER The Power Partners. 5 - 37 PSL-Family Ii Switching Regulators 19" Industrial Environment Vo+ Vi+ Io Input Filter L (option) Ui Control circuit Ce C (option) + - A (option) Uo R/i Gi- Go- Fig. 1 Block diagram P (option) D (option) Safety and Installation Instructions 5.2 Safety If the output circuit of a switching regulator is operator-accessible according to the IEC 950 related safety standards, it shall be an SELV circuit (Safety Extra Low Voltage circuit, i.e. a circuit, separated from mains by at least basic insulation, that is so designed and protected that under normal and single fault conditions, the voltage between any two conductors and between any conductor and earth does not exceed 60 V DC). In the following section an interpretation is provided of the IEC 950 safety standard with respect to the safety status of the output circuit. However, it is the sole responsibility of the installer or user to assure the compliance with the relevant and applicable safety standards. If the following table is observed, the output of any switching regulator is considered to be an SELV circuit up to a nominal output voltage of 36 V. Note: Check for hazardous voltages before altering any connections. Do not open the module. The input and the output circuitry are not separated, i.e. the negative path is internally interconnected! Table 2: Insulation concept for SELV circuits Nominal mains supply voltage (AC) Minimum required grade of isolation, to be provided by the AC-DC front end, including mains supplied battery charger None Battery supply completely separated from mains 250 V Basic Double or reinforced 1 2 3 Maximum output voltage from the front end 60 V 80 V Minimum required safety status of the front end output circuit Measures to achieve the specified safety status of the output circuit Resulting safety status of the switching regulator output circuit SELV battery circuit None SELV circuit fuse 1 Hazardous voltage battery circuit 2 Input and unearthed, SELV circuit non operator-accessible case 2 Hazardous voltage battery circuit Input fuse 1 and earthed output Earthed SELV circuit 3 and earthed 3 or non circuit operator-accessible case Earthed SELV circuit Earthed input circuit 3 SELV circuit ELV circuit Input fuse 1 and earthed output circuit 3 Earthed SELV circuit 80 V Hazardous voltage secondary circuit Input fuse 1 and earthed output Earthed SELV circuit 3 and earthed 3 or non circuit operator-accessible case 60 V SELV circuit None 80 V Double or reinforced insu- Input fuse 1 and unearthed and SELV circuit lated unearthed hazardous non operator-accessible case 2 voltage secondary circuit 2 60 V SELV circuit The installer shall provide an approved fuse (slow blow type with lowest rating suitable for the application, max. 12.5 A) in the positive or negative input conductor directly at the input of the switching regulator. For UL's purpose, the fuse needs to be UL-listed. If option C is fitted, a suitable fuse is built-in. Has to be insulated from earth by double or reinforced insulation according to the relevant safety standard, based on the maximum input voltage of the switching regulator (contrary to the case marking: "This apparatus must be earthed."). The earth connection has to be provided by the installer according to the relevant safety standards, e.g. IEC 950. 5 - 38 MELCHER The Power Partners. Edition 2/96 - (c) Melcher AG Switching Regulators 19" PSL-Family Standards and Approvals All Melcher power supplies are subject to manufacturing surveillance in accordance with ISO 9001 standards. All units are UL recognized as per UL 1950, UL 1012 and CAN/CSA C22.2 No. 234-M90. Protection Degree The protection degree is defined by IP 30 (equipped with any potentiometer adjustable option: IP 20). The protection degree applies only if the module is plugged-in or the female connector is properly attached to the module. Installation Instructions Table 3: H11 connector pin allocation and designation The connector pin allocation table defines the electrical potentials and the physical pin position on the connector. Pin no. 32 is the protective ground pin and is protruding, i.e. attaching the female connector, this pin provides electrical contact first. The modules should only be wired via the female connector H11 (according to DIN 41612) to ensure requested safety! 32 29 26 23 20 17 14 11 8 5 Electrical Determination 2 Fig. 2 View of male H11 connector 1 Type H11 Pin No. Design. R-input (or inhibit input) 1 2 R (i) Undervoltage monitor (Option D) 5 D Output voltage (negative) 8 Go- Output voltage (negative) 11 Go- Output voltage(positive) 14 Vo+ Output voltage (positive) 17 Vo+ Input voltage (negative) 20 Gi- Input voltage (negative) 23 Gi- Input voltage (positive) 26 Vi+ Input voltage (positive) 29 Vi+ Protective ground (protruding pin) 32 R-input (output voltage programming) not available with option P (potentiometer) or option i (inhibit) Immunity to Environmental Conditions Table 4: Mechanical stress Test Method Standard Test Conditions Ca Damp heat steady state DIN 40046 part IEC 68-2-3 MIL-STD-810D section 507.2 Temperature: Relative humidity: Duration: 40 2 C 93 +2/-3 % 56 days Unit not operating Ea Shock (half-sinusoidal) DIN 40046 part 7 IEC 68-2-27 MIL-STD-810D section 516.3 Acceleration amplitude: Bump duration: Number of bumps: 100 gn = 981 m/s2 6 ms 18 (3 each direction) Unit operating Eb Continuous shock (half-sinusoidal) DIN 40046 part 26 IEC 68-2-29 MIL-STD-810D section 516.3 Acceleration amplitude: Bump duration: Number of bumps: 40 gn = 392 m/s2 6 ms 6000 (1000 each direction) Unit operating Fc Vibration (sinusoidal) DIN 40046 part 8 IEC 68-2-6 MIL-STD-810D section 514.3 Frequency (1 Oct/min): Max. vibration amplitude: Acceleration amplitude: Test duration: 10...2000 Hz 0.35 mm (10...60 Hz) 5 gn = 49 m/s 2 (60...2000 Hz) 7.5 h (2.5 h each axis) Unit operating Fda Random vibration DIN 40046 part 23 wide band IEC 68-2-35 reproducibility high Acceleration spectral density: Frequency band: Acceleration magnitude: Test duration: 0.05 g2 /Hz 20...500 Hz 4.9 g rms 3 h (1 h each axis) Unit not operating Kb Salt mist cyclic (sodium chloride NaCl solution) Concentration: Duration: Storage: Storage duration: Number of cycles: 5% (30C) 2 h per cycle 40C, 93 % rel. humidity 22 h per cycle 3 Unit not operating DIN 40046 part 105 IEC 68-2-52 Status Table 5: Temperature specifications Temperature Standard -7 Option -9 Characteristics Conditions min max min max Unit TA Ambient temperature 71 -40 71 C Case temperature U i min...U i max Io = 0...Io nom -25 TC -25 95 -40 95 TS Storage temperature Not operational -40 100 -55 100 Edition 2/96 - (c) Melcher AG MELCHER The Power Partners. 5 - 39 5.2 Industrial Environment PSL-Family Switching Regulators 19" Industrial Environment Table 6: MTBF and device hours MTBF Ground Fixed MTBF acc. to MIL-HDBK-217D 1 Device Hours 1 Ground Mobile TC = 40C TC = 70C TC = 40C TC = 70C 130'000 h 58'000 h 36'000 h 17'000 h 3'900'000 h Statistical values, based on an average of 4300 working hours per year and in general field use Electromagnetic Compatibility EMC Immunity General condition: Case earthed. 5.2 Table 7: Immunity type tests Phenomenon Standard Class Level Coupling mode 4 Value applied Waveform Source Imped. Test procedure Impulse voltage IEC 255-4 App. E4 5 (1976) III i/o, i/c, o/c +i/-i 5000 Vp 1.2/50 s 500 3 pos. and 3 neg. impulses per coupling mode no - High frequency disturbance IEC 255-4 App. E5 5 (1976) III i/o, i/c, o/c 2500 Vp 200 1 1000 Vp 2 s per coupling mode yes +i/-i 400 damped 1 MHz waves/s Voltage surge IEC 571-1 (1990-07) i/c, +i/-i 800 Vp 100 s 100 yes 2 1500 Vp 50 s 3000 Vp 5 s 10 positive and 10 negative discharges yes 1 6 26...1000 MHz yes 1 1 min positive 1 min negative bursts per coupling mode yes 1 3 6 Electrostatic discharge IEC 801-2 (1991-04) 3 contact discharge to case Electric field IEC 801-3 (1984) 2 antenna in 1m distance Fast transient/ burst IEC 801-4 (1988) 3 i/c, +i/-i 4 Transient Immunity to conducted disturbancies 1 2 3 4 5 6 7 IEC 801-5 (Draft 1993-01) III IEC 801-6 3 4000 Vp 1 s 7000 Vp 100 ns 6000 Vp 1/50 ns 3 V/m i/c 2000 Vp +i/-i 1000 Vp i, o, signal wires 10 Vrms 7 1 pos. and 1 neg. voltage surge per coupling mode 330 sine wave modulated w. 1 kHz 2000 Vp bursts of 5/50 ns 5 kHz rep. rate transients with 15 ms burst duration and a 4000 Vp 300 ms period 1.2/50 s 80% amplitude modulated with 1 kHz In Peroper. form. 50 2 3 6 12 yes 2 6 2 5 pos. and 5 neg. impulses per coupling mode 50 AM 0.15...80 MHz yes 1 Normal operation, no deviation from specifications Normal operation, temporary deviation from specs possible With option C: manual reset i = input, o = output, c = case In correspondance with DIN 57435 part 303 and VDE 0435 part 303 (1984-09) Option L neccessary Open circuit Emission For emission levels refer to "Electrical Input and Output Data". 5 - 40 MELCHER The Power Partners. Edition 2/96 - (c) Melcher AG Switching Regulators 19" Characteristics and Definitions Output Protection A voltage suppressor diode protects the output against an internally generated overvoltage, which could occur due to a failure of the control circuit, which in worst case conditions fails into a short circuit. The suppressor diode is not designed to withstand externally applied overvoltages. The user should ensure that systems with Melcher power supplies, in the event of a failure, do not result in an unsafe condition (fail-safe). Dynamic Characteristics Uo Uo I Uo I Short circuit behaviour uod tr tr t I o/I o nom 3/3 2/3 1/3 0 Parallel and Series Connection Outputs of equal nominal voltages can be parallel-connected. However, the use of a single unit with higher output power, because of its power dissipation, is always a better solution. In parallel-connected operation, one or several outputs may operate continuously at their current limit knee-point which will cause an increase of the case temperature. Consequently, the max. ambient temperature value should be reduced by 10 K. Outputs can be series-connected with any other module. In series-connection the maximum output current is limited by the lowest current limitation. Galvanically separated source voltages are needed for each module! A constant current limitation circuit holds the output current almost constant whenever an overload or a short circuit is applied to the regulator's output. It acts self-protecting and recovers - in contrary to the fold back method - automatically after removal of the overload or short circuit condition. Uo/Uo nom 1.2 t 10 s 10 s 1.0 0.8 Fig. 3 Behaviour and characteristics under varying load conditions. Temperature Io L 0.6 0.4 0.2 0 When a converter is located in free, quasi-stationary air at a temperature TA = 71C and is operated at its nominal output power, the case temperature TC will be about 95 C after the warm-up phase measured at the measuring point of case temperature TC (see "Mechanical Data"). Under practical operating conditions, the ambient temperature TA may exceed 71C, provided additional measures are taken to ensure that the case temperature TC does not exceed its maximum value of 95C ( heat sink, fan, etc.). Example: Sufficient forced cooling allows TA max = 85 C. A simple check of the case temperature TC (TC 95C) at full load ensures correct operation of the system 5.2 uod PSL-Family Io nom Industrial Environment 0.2 0.4 0.6 0.8 1.0 1.2 1.4 Io/Io nom Fig. 5 Overload, short-circuit behaviour Uo versus Io Po [%] 110 100 Po max (forced cooling) Po max (convection cooling) 90 80 70 60 50 40 30 20 10 0 TC max -40 50 60 70 80 90 100 TA [C] Fig. 4 Output power derating versus ambient temperature Edition 2/96 - (c) Melcher AG MELCHER The Power Partners. 5 - 41 PSL-Family Switching Regulators 19" Industrial Environment Electrical Input and Output Data General Conditions - TA = 25C, unless TC is specified. - With R or option P, output voltage Uo = Uo nom at Io nom Table 8a: Input and output data Characteristics Conditions min PSL 5A12 typ max min PSL 5A10 typ max min PSL 128 typ max Unit 5.2 Output Uo nom Output voltage Ui nom, Io nom 5.07 Io nom Output current IoL Output current limitation response Ui min... Ui max TC min...TC max 12.0 uo Ripple at output (BW = 20 MHz) 5.13 5.07 15.6 10.0 12.0 Ui nom I o nom 5.13 11.92 13.0 8.0 10.0 12.07 8.0 V A 10.4 50 35 50 80 150 mVpp Uo U Static control deviation Ui min... Ui max versus input voltage Ui I o nom 45 30 45 50 75 mV Uo I Static control deviation Ui nom versus output current Io I o = 0...Io nom 25 20 25 28 35 uo d Dynamic control deviation 1 130 130 130 tr Dynamic load transient time recovery 1 40 50 60 uo Temperature coefficient Ui min... Ui max Uo /TC TC min...TC max I o = 0...I o nom Ui nom I o nom 1/ 3 Io nom s 1 1 2 mV/K 0.02 0.02 0.02 %/K 80 V DC Input Ui I o = 0...I o nom TC min...TC max Input voltage Uio min Minimum differential voltage U i - Uo 2 Ui o Undervoltage cut-out Ii 0 No load input current Ii m Peak value of inrush current ti s Rise time Io = 0 Ui min... Ui max Ui nom 3 Tail half value time Ii m Peak value of inrush current Rise time 40 8 80 15 2 3 3 6.3 7.3 7.3 45 40 V 35 mA 150 250 250 A 5 5 5 s 3 ti r ti s 7 3 Ui nom with option L 3 3 ti r Tail half value time ui rfi RFI level at input, 4 0.01...30 MHz 3 40 40 40 250 350 350 A 25 25 25 s 125 VDE 0871 (6.78) Ui nom, I o nom 125 B 125 B B dB (V) Efficiency Efficiency Ui nom, Io nom 83 76 89 % 750 750 750 V DC Isolation Uis 1 2 3 4 Isolation test voltage electronics to case Inputs/outputs interconnected See "Dynamic characteristics" The minimum differential voltage Uio min between input and output increases linearly from 0 to 1 V at TA = 46C and 71C (TC = 70C and 95C) Definitions according to VDE 0433, part 3 With option L and additional external input capacitor Ce = 120 F/100 V, e.g. Nichicon, PF(M) series, or equivalent 5 - 42 MELCHER The Power Partners. Edition 2/96 - (c) Melcher AG Industrial Environment Switching Regulators 19" PSL-Family Table 8b: Input and output data Characteristics Conditions min PSL 158 typ max min PSL 248 typ max min PSL 368 typ max Unit Output Uo nom Output voltage Ui nom, I o nom Io nom Output current IoL Output current limitation response Ui min...Ui max TC min... TC max uo Ripple at output (BW = 20 MHz) 14.91 15.09 23.85 10.4 8.0 8.0 8.0 Ui nom I o nom 24.14 35.78 10.4 8.0 8.0 36.22 8.0 V A 10.4 150 100 250 150 300 mVpp Uo U Static control deviation Ui min...Ui max versus input voltage Ui I o nom 70 100 150 220 200 270 mV Uo I Static control deviation Ui nom versus output current I o I o = 0...Io nom 33 45 120 160 125 160 uo d Dynamic control deviation 1 tr Dynamic load transient time recovery 1 uo Temperature coefficient Ui min...Ui max Uo /TC TC min... TC max I o = 0...I o nom Ui nom I o nom 1 /3 I o nom 130 150 220 60 80 100 5.2 80 s 3 5 8 mV/K 0.02 0.02 0.02 %/K 80 V DC Input Ui I o = 0...I o nom TC min... TC max Input voltage Uio min Minimum differential voltage Ui - Uo 2 Ui o Undervoltage cut-out Ii 0 No load input current Io = 0 Ui min...Ui max Ii m Peak value of inrush current 3 Ui nom ti s Rise time 3 ti r Tail half value time Ii m Peak value of inrush current 3 ti s Rise time 3 ti r Tail half value time ui rfi RFI level at input, 4 0.01...30 MHz 3 Ui nom with option L 3 19 80 29 80 42 4 5 6 7.3 12 19 35 35 V 40 mA 250 250 250 A 5 5 5 s 40 40 40 350 350 350 A 25 25 25 s 125 VDE 0871 (6.78) Ui nom, I o nom 125 B 125 B B dB (V) Efficiency Efficiency Ui nom, I o nom 90 92 94 % Inputs/outputs interconnected 750 750 750 V DC Isolation Uis Isolation test voltage electronics to case 1 See "Dynamic characteristics" The minimum differential voltage Uio min between input and output increases linearly from 0 to 1 V at TA = 46C and 71C (TC = 70C and 95C) 3 Definitions according to VDE 0433, part 3 4 With option L and additional external input capacitor C = 120 F/100 V, e.g. Nichicon, PF(M) series, or equivalent e 2 Edition 2/96 - (c) Melcher AG MELCHER The Power Partners. 5 - 43 PSL-Family Switching Regulators 19" Industrial Environment Standard Features R External Output Voltage Adjustment Note: With open R input, Uo = Uo nom. (For superseded PSR types, Uo = 1.08 * Uo nom) R-input together with option i or option P cannot be supported simultaneously. The output voltage Uo can either be adjusted with an external resistor (R 1 or R 2) or with an external voltage (Uex). The adjustment range is 0...1.08 of Uo nom. The minimal differential voltage Uio min between input and output should be maintained (see data). Min. input = Undervoltage cut-out. Vo + Uref R2 4000 + R - R1 G Go - Fig. 7 Voltage adjustment with external resistor R1 or R2 [] Vo + U ref b) Uo = 0...100% Uo nom, using R1 between R and G (Go-): R1 4000 * Uo Uo Uo nom * -------- R1 -------- R1 + 4000 Uo nom - Uo 4000 R + + - Uex Go - R2 Uo Uref * ------------------ k * (R2 + 4000) - 4000 Fig. 6 Voltage adjustment with Uex [V] between R and G (Go-): U o nom a) Uo Uex * ------ (U ref = 2.5 V 4%) Uref Uo * (1-k) R2 4000 * --------- k * Uo - Uref Caution: To prevent damage Uex should not exceed Uref, nor be negative. U ref k = ------ Uo nom ( Uref = 2.5 V 4%) All formulae give approximate values only. Description of Options Vo+ Vi+ Uinh Go- Gi- Fig. 8 Definition of Iinh and Uinh I inh [mA] Uo/Uo nom 5 1 4 3 0.1 0 U inh tr tf t 2 1 1 0 Fig. 9 Output response as a function of inhibit signal Iinh i U inh = 2.4 V Option i Inhibit Note: With open i-input, output is enabled (Uo = on). Inhibit excludes R function! The inhibit input allows the switching regulators to be disabled via a control signal. In systems with several units, this feature can be used, for example, to control the activation sequence of the regulators by a logic signal (TTL, C-MOS, etc.). An output voltage overshoot will not occur when the units are switched on or off. U inh = 0.8 V 5.2 G c) Uo = Uo nom... Uo max, using R2 between R and Vo+: Uo max = Uo nom + 8 % U o on U o off 0 -50 -40 -30 -20 -10 t 0 10 20 30 40 50 U inh [V] Fig. 10 Inhibit current Iinh versus inhibit voltage Uinh Data Table 9: Inhibit characteristics Characteristics Uinh Inhibit input voltage to keep regulator output voltage... Uo = on Uo = off tr Switch-on time after inhibit command tf Ii off 5 - 44 Conditions min Ui min... Ui max TC min... TC max typ max Unit -50 +0.8 V DC +2.4 +50 Switch-off time after inhibit command Ui = Ui nom RL = Uo nom /I o nom 10 Input current when inhibited I o = 0, Ui =Ui nom 10 MELCHER The Power Partners. 5 ms mA Edition 2/96 - (c) Melcher AG Switching Regulators 19" Option -9 Extended Temperature Range The operational ambient temperature range is extended to TA = -40...71C. PSL-Family Option P Potentiometer Option P and the R-function cannot be supported simultaneously. The output voltage Uo can be adjusted with a screwdriver in the range from 0.92...1.08 of the nominal output voltage Uo nom. However, the minimum differential voltage Ui o min between input and output voltages as specified in "Electrical Input and Output Data" should be maintained. Option L Input filter Option L is recommended to reduce superimposed interference voltages, and to prevent oscillations, if input lines exceed approx. 5 m in total length. The fundamental wave (approx. 120 kHz) of the reduced interference voltage between Vi+ and Gi- has, with an input line inductance of 5 H a maximum magnitude of 4 mVrms. The input impedance of the switching regulator at 120 kHz is about 50 m. The harmonics are small in comparison with the fundamental wave. See also data: RFI. Option U Ambient Temp. Range acc. UL Recognition Underwriters Laboratories (UL) have approved the PSL family as recognized components up to an ambient temperature of TA max - 10 K given by the upper temperature limit of the standard PCB material. If the full maximum ambient temperature TA max is required with UL approval, option U should be requested. It consists of an alternative PCB material with a higher maximum temperature specification. With option L, the maximum permissible additionally superimposed ripple ui of the input voltage (rectifier mode) at a specified input frequency f i has the following values: Input voltage up to 40 V: ui max = 12 Vpp at 100 Hz or Vpp = 1200 Hz/ f i * 1V Input voltage up to 80 V: ui max = 22 Vpp at 100 Hz or Vpp = 2200 Hz/ f i * 1V The European approval boards have in contrast to UL accepted the standard PCB material to be operated up to TA max = 71C without any further precautions. Option C Thyristor Crowbar Note: As a central overvoltage protection device, the crowbar is usually connected to the external load via distributed inductance of the lines. For this reason, the overvoltage at the load can temporarily exceed the trigger voltage Uo c. Depending on the application, further decentralized overvoltage protection elements may have to be used additionally. This option is recommended to protect the load against power supply malfunction, but it is not designed to sink external currents. A fixed-value monitoring circuit checks the output voltage Uo . When the trigger voltage Uoc is reached, the thyristor crowbar triggers and disables the output. It may be deactivated by removal of the input voltage. In case of a switching transistor defect, an internal fuse prevents excessive current. Table 10: Crowbar trigger levels Characteristics Uo c Trigger voltage ts Delay time Conditions 5.1 V Ui min... Ui max I o = 0...I o nom TC min... TC max 12 V 15 V 24 V 36 V Unit min max min max min max min max min max 5.8 6.8 13.5 16 16.5 19 27 31 40 45.5 V 1.5 s 1.5 1.5 Option D ("Save Data", input undervoltage monitor) Note: Output instead of input undervoltage monitor is available on request (option D1). If the input voltage Ui is below the adjustable threshold voltage Ut, the control circuit for terminal D has low impedance. Terminal D and Go- are connected to a self-conducting field effect transistor (FET). A 0.5 W Zener diode provides protection against overvoltages. 1.5 1.5 The voltage Ut can be externally adjusted with a trim potentiometer by means of a screwdriver. The hysteresis UH of Ut is <2%. Terminal D stays low for a minimum time tlow min , in order to prevent any oscillation. Ut can be set to a value between Ui min and Ui max according to fig. 10. It is important to note that the FET can become conductive again when UD > Ui - 3V. UH UD 10 k D Vi + ID U D high +5 V FET Ut 8.2 V UD 100 pF U D low Gi - Go - Fig. 11 Test circuit with definition of voltage UD and current ID on Terminal D. Edition 2/96 - (c) Melcher AG Fig. 12 Definition of Ut and UH MELCHER The Power Partners. Ut Ui 5 - 45 5.2 Industrial Environment PSL-Family Switching Regulators 19" Industrial Environment Data Table 11: Option D data Characteristics Conditions PSL min Unit typ UD low Voltage - Terminal D at low impedance Ui < Ut, I D 2.5 mA UD high Voltage - Terminal D at high impedance Ui > Ut + UH, I D > 25 A tlow min Minimum duration UD low 30 tD f Response time to UD low 1 ID max Maximum current - Terminal D max 0.8 V 4.75 ms s 20 mA Application examples Option A Test sockets Test sockets (pin O = 2 mm) for measuring the output voltage are located at the front panel of the module. The output voltage is measured internally directly at the connector pins. Mechanical Data Dimensions in mm. Tolerances 0.3 mm unless otherwise indicated. European Projection 168.5 0.5 17.4 10.9 M2.5 159.4 4.9 127 20 0.5 2 TE 6 TE 100 88 99 M3; 4 mm deep (for mounting screws) 2 35 107 1 min. 5 100 0.5 o5.2 o3 0.9 9.1 x 4.1 9.5 Test sockets (option A) LED output voltage indicator Potentiometer (option P) 40.6 34.3 26.6 32 1.5 173.7 0.5 20.32 4 TE Mounting plane of connector H11 Fig. 13 Case L04 (weight 550 g) 5 - 46 (19.1) 11 6.4 Measuring point of case temperature TC 4 TE Potentiometer (option D) 36.5 0.8 5.2 a) The signal UD can be utilized in battery powered systems to provide a warning in case of low batteries. b) In case of power failure, the signal can serve to initiate data save routines. MELCHER The Power Partners. Edition 2/96 - (c) Melcher AG Industrial Environment Switching Regulators 19" PSL-Family Type Key and Product Marking Type Key PSL 12 8 -7 L i R P C D A Positive switching regulator in case L04 ..................... PSL Blank .................................................................................. Nominal output voltage in volt (5A -> 5.1) ............. 5.1...36 Nominal output current in ampere ............................. 8...12 Ambient temperature range TA = -25...71C ................................................... -7 TA = -40...71C ................................................... -9 Input filter ......................................................................... L Inhibit input ........................................................................ i External output voltage adjustment ................................. R Potentiometer ...................................................................P 5.2 Thyristor-Crowbar ........................................................... C "Save Data" undervoltage monitor .................................. D Test sockets .....................................................................A Example:PSL 128-7LiPC = A positive switching regulator with a 12 V, 8 A output, ambient temperature range of -25...71C, input filter, inhibit input, potentiometer and thyristor-crowbar. Produkt Marking Main face: Family designation, applicable safety approval and recognition marks, warnings, pin allocation, Melcher patent nos. and company logo. Front plate: Identification of LED, optional test sockets and potentiometers. Back plate: Specific type designation, input voltage range, nominal output voltage and current, pin allocation of options and auxiliary functions and degree of protection. Rear side: Label with batch no., serial no. and data code comprising production site, modification status of the main PCB and production date. Edition 2/96 - (c) Melcher AG MELCHER The Power Partners. 5 - 47