HK SERIES SINGLE OUTPUT, SPECIALLY DESIGNED FOR APPLICATION OF INTELLIGENT PASSIVE TRANSMITTER FEATURES l Applied to the loop to take power occasion l High efficiency, Low power consumption l 1000VDC isolation l Excellent temperature performance l Natural air Cooled l Industrial standard pin-out l Anti-flaming Packaging,UL94-V0 Compliant APPLICATION HK series of products are mainly used in applications of two-wire Patent Protected RoHS signal and HART transmission, to solve a series of problems due to PART NUMBER SYSTEM the ground potential difference during the transmission application of them caused by different ground loops, such as, the signal HK3S03B transmission errors around 4~20mA, followed by the interruption of Package Style Output Voltage Input Voltage Product Series HART communication or damage to equipment port device. HK series adopts the loop way to take power, and compensates transmission errors caused by electric potential difference, so as to ensure the accuracy of the communication transmission. SELECTION GUIDE Model Number Input Voltage (VDC) Nominal Output Voltage (VDC) Output Current (mA) Input Current (mA)(Typ.) @ Max.load @ No load Reflection Ripple Current (mA,Typ.) Max. Capacitor Load (µF) *HK3S03B 3.3 3.3 3.0 4-20 1 15 10 HK5S03B 5 3.3 3.2 4-20 1 15 10 HK5S05B 5 5 2.0 4-20 1 15 10 HK5S03BV 5 3.3 3.0 3.5-22 1 15 10 HK8S03B 7.5 3.3 3.5 4-20 1 15 10 HK8SX3B 7.5 3 5.0 4-20 1 15 10 HK8S05IB 7.5 5 3.5 4-20 1 15 10 * Designing INPUT SPECIFICATIONS Item Input Surge Voltage (1sec.max.) Test Conditions Min. Typ. Max. 3.3VDC input -0.7 -- 5 5VDC input -0.7 -- 9 7.5VDC input -0.7 -- 18 Input Filter Unit VDC Capacitance Filter OUTPUT SPECIFICATIONS Item Test Conditions Line Regulation For Vin change of ±1% Load Regulation Temperature Drift 10% to 100% load Min. Typ. Max. HK8S05IB -- -- ±0.25 Others -- -- ±1.2 3VDC output -- 15 -- 3.3VDC output -- 15 -- HK5S05B -- 12 -- HK8S05IB -- -- ±1.5 -- ±0.03 100% load The copyright and authority for the interpretation of the products are reserved by MORNSUN -HK series 2013.10.09- A/3 Page 1 of 4 Unit % %/°C COMMON SPECIFICATIONS Item Test Conditions Min. Typ. Max. Unit Isolation Voltage Input-Output, tested for 1 minute and leakage current less than 1 mA 1000 -- -- VDC Isolation Resistance Input-Output, test at 500VDC 1000 -- -- MΩ Switching Frequency 100% load, Input voltage range -- 100 300 KHz MTBF MIL-HDFK-217F@25℃ 3500 -- -- K hours HK5S03BV -- 2.9 -- Others -- 2.1 -- Case Material Plastic (UL94-V0) Weight g ENVIRONMENTAL SPECIFICATIONS Item Test Conditions Min. Typ. Max. Unit Item Non condensing -- -- 95 % -40 -- 85 Storage Humidity Operating Temperature -50 -- 125 Storage Temperature Ta=25°C -- 25 -- Temp. rise at full load 1.5mm from case for 10 seconds -- -- 300 Lead Temperature Free air convection PRODUCT TYPICAL CURVE Out put Po wer Percent(% ) Temperatur e Der ating Curve 12 0 10 0 80 60 Saf e Operating Area 40 20 0 -40 0 40 85 10 5 12 0 Amb ie nt Temp.(℃ ) (Figure1) DIMENSIONS, RECOMMENDED FOOTPRINT & PACKAGING (Figure 2) The copyright and authority for the interpretation of the products are reserved by MORNSUN HK series 2013.10.09- A/3 Page 2 of 4 °C (Figure 3) Note:1. Figure 2 applies to HK5S03B、HK5S05B、HK8S03B、HK8SX3B、HK8S05IB、HK3S03B； 2.Figure 3 applies to HK5S03BV. TEST CONFIGURATIONS Input Reflected-Ripple Current Test Setup Input reflected-ripple current is measured with an inductor Lin and Capacitor Cin to simulate source impedance. Oscilloscope Lin Cin Lin(4.7µH) Current Probe DC DC Load Cin(220µF, ESR < 1.0Ω at 100 KHz) DESIGN REFERENCE Ground Loop Problem In Signal Transmission And Ground Electric Potential Difference There are many reasons causing ground loop problem in instrument circuit.When the signal transmission and receiving devices connected to a different location or of different power supplies, it will lead to ground loop, and it is common in long cable transmission. Most of the reason is that the equipment of the metal shell had physical contact with the ground. Ground loop produces electric circuit, and form error sources. Because the accuracy of the signal can not be measured through simple observation in the receiving end of the signal. the land circulation for different ground potential will bring error that can't be detected to signal loop. There is also a signal error problem caused by ground loop in the absence of two-wire signal isolation transmission. Signals like lightning signal and surge signal will load on the signal line along with long wire, and damage modulation and detection devices on the port. In another case, two components of the different potential port may lead to the port voltage exceeding, and damage the device port subsequently. Signal transmission mode of non-isolated two-wire system 3.3V ～ v ol tage reguls tor 4-20 mA c urrent loop DAC transducer 24V ～ ～ RL PLC ADC MCU 2.5V HART modulator two wir e instr ument (Figure 4) The copyright and authority for the interpretation of the products are reserved by MORNSUN HK series 2013.10.09- A/3 Page 3 of 4 In the circuit of figure 4, Sensor signal is converted into digital signals through the ADC, then sent to the current loop DAC and HART modulator through MCU, form 4~20 mA signal output. Current loop DAC takes electricity from the PLC bus of output 4~20 mA, output 3.3 V and 2.5 V through the built-in voltage regulator, supply a small amount of power for MCU and HART modulator. In the transmission of figure 4, there are ground electric potential differences between two-wire system instrument and PLC on the far side , introducing the common mode interference. The disturbance causes the transmission error of 4~20 mA, and affects the normal communication HART bus. If the common mode interference is too large (over the voltage range of the components in the common-mode), it may cause damage in the internal instrument of two wire devices. Signal transmission mode of isolated two-wire system H K D 4 -20mA ～ 3.3V volt age regulstor current loop DA C tran s du c er 24V ～ ～ ADC MCU RL PLC Dig ita l iso lat ion 2.5V H A R T m o d u l a to r tw o w ire in stru m e nt (Figure 5) Due to the potential risks based on the different ground, you can isolate the MCU and the current loop DAC and HART modulator by digital isolation. Current loop DAC and HART modulator is floating form. They make the high impedance formed to two ground potential between twowire instrument and PLC system, reduce the loop current between the ground wire, and electrical isolation between two devices, so as to eliminate the hidden trouble of common mode interference. The two-wire instrument goes without additional power supply port. The power supply takes power through the 4-20mA loop. After the isolation mode,2.5V power of HART modulator is still formed from the built-in voltage regulator of loop DAC regulator, but the power supply for the 3.3V MCU system is a difficult problem. A better solution is to connect with a voltage stabilizing diode in the 4-20mA circuit as shown in Figure 5. Then you can use HK module of MORNSUN to isolated and output 3.3Vpower to the MCU power system. Using the HK module and digital isolation circuit made by MORNSUN, you can realize the electrical isolation of two-wire instrument and PLC system .It avoids the measuring error of the system and damaging equipment caused by ground potential, and it further enhances the reliability of the system. Note: 1. Operation under minimum load will not damage the converter; However, they may not meet all specifications. 2. Max. Capacitive Load is tested at nominal input voltage and full load. 3. Unless otherwise noted, All specifications are measured at Ta=25°C, humidity<75%, nominal input voltage and rated output load. 4. In this datasheet, all test methods are based on our corporate standards. 5. All characteristics are for listed models, and non-standard models may perform differently. Please contact our technical support for more detail. 6. Please contact our technical support for any specific requirement. 7. Specifications of this product are subject to changes without prior notice. MORNSUN Science & Technology Co.,Ltd. Address: No. 5, Kehui St. 1, Kehui development center, Science Ave., Guangzhou Science City, Luogang district, Guangzhou,P.R.China. Tel: 86-20-38601850 Fax:86-20-38601272 E-mail: [email protected] Http://www.mornsun-power.com The copyright and authority for the interpretation of the products are reserved by MORNSUN HK series 2013.10.09- A/3 Page 4 of 4