SD Series User’s Manual SD2500 / SD3500 PURE SINE WAVE INVERTER
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Table of Content 1. IMPORTANT SAFETY INFORMATION 1 1-1. General Safety Precautions 1 1-2. Precautions When Working with Batteries 1 1-3. Installation 2 2. FUNCTIONAL CHARACTERISTICS 3 2-1. General Information 3 2-2. Application 3 2-3. Electrical Performance 4 2-4. Mechanical Drawings 8 3. INTRODUCTION 9 3-1. Power ON / OFF / REMOTE (Main) switch 10 3-2. LED Indicator 10 3-3. DIP Switch (S1~S8) Assignment 11 3-4. DC Input - 12 3-5. DC Input + 13 3-6.
. DC WIRING CONNECTIONS 17 4-1. DC Input Terminals 18 4-2. Hard-wire Installation 19 5. PARALLEL MODE 24 5-1. Prepare for Parallel Usage 24 5-2. Industry Applications 25 5-3. DC Wiring for Parallel Usage 27 5-4. AC Wiring Diagram 29 5-5. Remote command for the parallel connection 33 5-6. Remove Parallel Connection 33 6. RS-232 COMMAND 6-1. RS-232 command introduction 34 34 7. TROUBLESHOOTING 42 8.
1. Important Safety Information WARNING! Before using the inverter, read and save the safety instructions. 1-1. General Safety Precautions 1-1-1. Do not expose the Inverter to rain, snow, spray, bilge or dust. To reduce risk of hazard, do not cover or obstruct the ventilation openings. Do not install the inverter in a zero-clearance compartment. Overheating may take place. 1-1-2.
1-3. Installation The power inverter should be installed in a location that meets the following requirements： Dry – Do not allow water to drip or splash on the inverter. Cool – Ambient air temperature should be between -20℃ and 50℃, but he cooler the better. Safety – Do not install batteries in the compartment or other areas here flammable fumes existence such as fuel storage areas or engine compartments. Ventilated – Allow at least one feet of clearance around the Inverter for air flow.
2. Functional Characteristics 2-1. General Information SD-series is new generation power inverter equipped with N+1 parallel power function , 3-phase capability, and AC transfer switch. SD series is suitable for RV, Marine and Emergency appliances.
2-3. Electrical Performance 2-3-1. SD2500 Specification MODEL SD2500-112 SD2500-124 SD2500-148 SD2500-212 SD2500-224 SD2500-248 Output Rating Power 2500W (de-rating after 40°C, refer to de-rating curve) Peak Power (3Sec.) 3000W Surge Power (<0.2Sec.) 4000W Waveform Efficiency (Max.) Output Voltage (@rated VDC) Pure Sine Wave 88% 89% 90% 100 / 110 / 115 / 120VAC ± 3% Output Frequency 50 / 60Hz ± 0.1% Total Harmonic Distortion (THD) < 3% @ under condition： greater than 1.
MODEL SD2500-112 SD2500-124 SD2500-148 SD2500-212 SD2500-224 SD2500-248 Environment Working Temp. -20～+60°C; refer SD2500 power de-rating curve Storage Temp. -40～+70°C Relative Humidity Max.
2-3-2. SD3500 Specification MODEL SD3500-112 SD3500-124 SD3500-148 SD3500-212 SD3500-224 SD3500-248 Output Rating Power 3500W (de-rating after 35°C, refer to de-rating curve for 12V) (de-rating after 40°C, refer to de-rating curve for 24V and 48V) Peak Power (3Sec.) 4500W Surge Power (<0.2Sec.) 6000W Waveform Efficiency (Max.) Output Voltage (@rated VDC) Pure Sine Wave 90% 90% 91% 100 / 110 / 115 / 120VAC ± 3% Output Frequency 50 / 60Hz ± 0.
MODEL SD3500-112 SD3500-124 SD3500-148 SD3500-212 SD3500-224 SD3500-248 Environment Working Temp. -20～+60°C; refer SD3500 power de-rating curve Storage Temp. -40～+70°C Relative Humidity Max.
Transfer-Time Table ATS Mode / Transfer Switch STS Frequency is synchronized: < 4ms.; Frequency is not synchronized: Inverter to utility AC: < 4ms.; Utility AC to inverter: 16~50ms. Inverter to utility AC: 8~10ms.; Utility AC to inverter: 16~50ms. Haphazard Inverter to utility AC: 8~10ms.; Utility AC to inverter: 16~25ms. Inverter to utility AC: 8~10ms.; Utility AC to inverter: 16~50ms. Inverter to utility AC: 8~10ms.; Utility AC to inverter: 16~25ms.
3. Introduction 16 15 14 13 12 11 10 9 8 1 AC INPUT AC OUTPUT 2 7 1 0 3 6 4 5 【Version 1】General Model Figure 4. SD general model front panel 16 15 14 13 12 11 8 9 1 2 7 3 6 4 5 【Version 2】UL Model Figure 5. SD UL model front panel 17 Figure 6.
Front Panel / Rear Panel 1 Power ON/OFF/REMOTE (Main) switch 10 AC output socket 2 Status LED 11 Reset Button 3 Dip Switch (S1~S8) 12 CAN2 Port (only to be used in parallel mode) 4 DC Input - 13 CAN1 Port (only to be used in parallel mode) 5 DC Input + 14 6 Chassis Ground 15 Green terminal (Remote and Parallel select) 7 AC Output 16 Remote / RS-232 port 8 By-pass AC Input 17 FAN 9 AC input circuit breaker LCM Port (Connection for LCD remote control panel) Table 3.
3-3. DIP Switch (S1~S8) Assignment S1 S2 S3 S4 S5 S6 S7 S8 AC INPUT S1 S2 S3 S4 S5 S6 S7 S8 AC OUTPUT 1 0 1 0 1=ON/0=OFF Figure 7.
B. Power device leaving saving mode(re-start) Restart threshold = rate power x setting % x 2~3 In case the power over the restart threshold, the power device will re-start and provide the AC power.
3-5. DC Input + (please refer to DC wiring connections on p. 17) 3-6.Chassis Ground：Connect the wire # 8 AWG to vehicle chassis WARNING! Operating the inverter without a proper ground connection may cause electrical safety hazard. 3-7. AC Output (Please refer to hard wiring installation on p. 19) 3-8. By-pass AC input (please refer to hard wiring installation on p. 19) 3-9. AC input circuit breaker The AC input circuit breaker protects the model from overload.
WARNING! LCM port is for remote control connection only. Please make sure the connection is correct. (CAN cable to CAN1 / CAN2 port , Remote cable to LCM port) If CAN cable is connected to LCM port, or vice versa, the inverter will be damaged. parallel only remote only 3-13. LCM Port Connection for LCD remote control panel, you can set and display the SD-series operation status. AC INPUT LCM S1 S2 S3 S4 S5 S6 S7 S8 AC OUTPUT 1 0 Figure 9. LCM port 8 1 1 8 Figure 10.
3-14. Green terminal (Remote and Parallel select) GND ENB ENB JUMP AC INPUT S1 S2 S3 S4 S5 S6 S7 S8 AC OUTPUT 1 0 Figure 11. Green terminal PIN # 1 2 3 4 5 PIN Assignment GND -ENB ENB Parallel Jump Parallel Jump Table 12. Green terminal PIN assignment 3-14-1. Parallel Jump Function (please refer to section 5 for further detailed info.) 1. Before installing the inverter, you need to ensure the main switch is in the OFF position. 2. Use 20 ~ 24 #AWG wire to connect the parallel jump terminal. 3-14-2.
Figure 14. RS-232 cable SD Series Computer PIN Num. Signal Description PIN Num. Signal Description 1 Not used 1 Not used 2 GND 5 GND 3 RXD 3 TXD 4 TXD 2 RXD 5 Not used Not used 6 Not used Not used Table 13. The connection between SD series and computer The connection between this SD-series and the computer is as follows： Figure 15. The connection between SD series and computer 3-16.
4. DC Wiring Connections Follow the instructions to connect the battery cables to the DC input terminals of the Inverter. The cable should be as short as possible (less than 6 feet / 1.8 meters ideally) so that it can handle the required current in accordance with the electrical codes or application regulations. Inappropriate length of cables will reduce the inverter performance such as poor surge capability, frequent low-input voltage warnings, and shut-down.
M8 SCREW RING TERMINAL Bat INLINE FUSE tery + Do not place anything between battery cable lug and terminal surface. Assemble exactly as shown. Figure 16. Battery cabling WARNING! During the first installation, a small spark is a normal phenomenon because the internal capacitors charging. Do not be concerned. 4-1. DC Input Terminals Connect DC input terminals to 12V / 24V / 48V battery or other power sources. [ + ] represents positive, [ - ] represents negative.
4-2. Hard-wire Installation 4-2-1. SD series provides the flexibility of hard-wire connection, and this function will make external control panel wiring easier. 】General model 【Version 1】 Step 1. Remove the four screws of AC wiring compartment and pull it out with care. Figure 17. General model setting―Step 1 Step 2. Pull the line through the snap bushing of the AC wiring compartment cover then follow below picture operation. 1 2 Figure 18.
Note The only difference between 110V and 220V is within the AC Input breaker L or N and thus will not affect the wiring configuration. Note In case that user wants to install the earth-leakage circuit breaker, COTEK recommend time delay type. The major specification of the circuit breaker is as following： Earth-leakage current：100mA, 300mA, 500mA Time：0.45 second, 1 second, 2 seconds Recommend model：NV50-SN, Time delay type of Shihin Electric 】UL model 【Version 2】 Step 1.
1 AC INPUT GND 2 AC INPUT / L 3 AC INPUT / N 4 AC OUTPUT / N 5 AC OUTPUT / L 1 2 3 4 5 6 6 AC OUTPUT GND Figure 22. UL model setting―AC wiring Step 3. Use the screwdriver to fix the cover. Figure 23. UL model setting―Step 3 4-2-2. Connect AC output and AC input wiring to the SD series terminals. Please take the following information as your reference.
When the unit is transferring power from the AC input source, the grounding condition of the “N” terminal of the AC output will be the same as the condition of the “N” terminal of the AC input source. If the AC input source is the power supplied from the utility, the “N” terminal would be a Neutral in the true sense. It will normally be bonded to the earth ground and will read almost 0 V with respect to the earth ground. In this case, touching this terminal will not be a shock hazard. 4-2-3.
Note Recommend GFCI connector： HUBBELL INC WIRING DEVICE DIV, Type GF20 and GFRST20. Rated 125V, 20A COOPER WIRING DEVICES, Type VGF20 and SGF20. Rated 125V, 20A LEVITON MFG CO INC, Type 7899-W and GFNT2. Rated 125V, 20A PASS & SEYMOUR INC, Type 2097. Rated 125V, 20A WARNING! When using full power, it is recommended to use the wiring terminal.
5. Parallel Mode 5-1. Prepare for Parallel Usage 1. Before setting, you need to ensure that the main switch is ”OFF”. 2. Before using the parallel function, you need to set the parallel jump of the green terminal the status of which must be “ON”, if the between in another SD is set to ”OFF” which is termination resistors. ON: Parallel Mode Parallel Jump OFF: Normal Figure 24. Parallel jump setting Example：If three SD inverters are paralleled, setup green terminal.
Note Please select one unit to be Master unit. Use the cables to connect Master and Slave units. The CAN1 and CAN2 port connection please refer to Figure 25. Note The simple method to determine the terminal resistor：No need to set the terminal resistor when CAN1 and CAN2 port have wiring. Note SD series can be used for N+1 (N≦14) redundancy and the ability of enlarge the capacity (Users can install maximum 15 units of inverters together in parallel in order to provide the power expansion). 3.
Type 1Φ2W 1Φ3W Vp 3Φ4W 100Vrms L1-N 0 Vp 50Hz 20ms 100Vrms V1 Vp Waveform L-N 0 V2 V3 50Hz N-L2 0 120o 0o 240o 360o 20ms 2Vp 200Vrms L1-L2 0 Inline Fuse Inline Fuse Inline Fuse AC AC RJ-45 RJ-45 Battery Set up AC AC AC L1 AC L2 DC RJ-45 N DC LOADS DC L1 L2 N DC RJ-45 DC AC DC L3 DC Battery-bank Batteries Batteries Warning Transfer Switch STS module：Single < 4ms; N+1 & 1P3W & 3P4W < 6ms Do not support N+1 operation, maximum of two SD inverters, THD < 4%
5-2-2. 1Φ2W Switch Table ― Auto Master Auto Master S4 S5 S6 S7 S8 0 0 0 0 1 Table 22. 1Φ2W switch table ─ auto master 5-2-3. 1Φ3W Switch Table S4 S5 S6 S7 S8 Master Slave 180° 0 0 0 1 1 0 1 1 1 1 Table 23. 1Φ3W switch table 5-2-4. 3Φ4W Switch Table S4 S5 S6 S7 S8 L1 Master L2 -120° Slave L2 +120° Slave 0 0 0 1 1 1 0 0 1 1 1 0 1 1 1 Table 24. 3Φ4W switch table 5-3. Wiring for Parallel Usage 5-3-1. Connection method 1. AC OUTPUT connector setup：Line link to Line; Neutral link to Neutral. 2.
CAN1 NEG(-) CAN2 AC INPUT AC INPUT AC OUTPUT AC OUTPUT POS(+) NEG(-) Junction box - POS(+) Junction box + L Batteries Loads N Figure 27. Connection Diagram_2 AC LOADS DC RJ-45 AC DC Battery-bank 1 Battery-bank 2 Not prefer to use different battery-bank configuration because batteries voltage is difficult to control. Figure 28.
5-4. AC Wiring Diagram Green Terminal CAN 1 / CAN2 Port RS-232 Wiring Terminal DIP Switch Figure 29. SD series front panel introduction 【1Φ2W ― Wiring Diagram】 Connect the SD series ─ RS-232 port with computer Setting S4 S5 S6 S7 S8 Wiring 0 0 0 1 1 MASTER GND AC INPUT / L AC INPUT / N AC OUTPUT / N SD series-1xx AC OUTPUT / L N AC 120V 120V Parallel Max.
【1Φ2W Auto Master ― Wiring Diagram】 Setting S4 S5 S6 S7 S8 Wiring 0 0 0 0 1 Auto MASTER GND AC INPUT / L AC INPUT / N AC OUTPUT / N SD series-1xx AC OUTPUT / L N Parallel Max. N+1=16 pcs AC 120V 120V AC INPUT / L AC INPUT / N LOAD L GND AC INPUT / L AC INPUT / N AC OUTPUT / N S4 S5 S6 S7 S8 0 0 0 0 1 SD series-1xx AC OUTPUT / L Auto MASTER Figure 31. 1Φ2W parallel AC wiring diagram ― auto master Note Auto master can be operated under 1Φ2W mode.
【1Φ3W ― Wiring Diagram】 Connect the SD series ─ RS-232 port with computer Setting S4 S5 S6 S7 S8 Wiring 0 0 0 1 1 MASTER GND AC INPUT / L AC INPUT / N AC OUTPUT / N L1 AC OUTPUT / L 120V AC INPUT / L1 AC INPUT / N N AC INPUT / L2 240V AC 120V 1Φ3W 120V GND LOAD AC INPUT / L AC INPUT / N AC OUTPUT / N AC OUTPUT / L SLAVE 180 S4 S5 S6 S7 S8 o 0 1 1 1 1 Figure 32.
【3Φ4W ― Wiring Diagram】 Connect the SD series ─ RS-232 port with computer Setting Wiring L1 MASTER S4 S5 S6 S7 S8 GND 0 0 0 1 1 AC INPUT / L AC INPUT / N AC OUTPUT / N L1 AC OUTPUT / L R 120V SD series-1xx AC OUTPUT / N 208V L2 -120o SLAVE 1 0 0 1 1 120V S4 S5 S6 S7 S8 GND AC INPUT / L AC INPUT / N L2 AC OUTPUT / N S AC OUTPUT / L SD series-1xx 208V AC INPUT / L1 208V AC INPUT / N AC 208V 3Φ4W LOAD 120V AC INPUT / L2 AC INPUT / L3 S4 S5 S6 S7 S8 GND 1 0 1 1 1 AC INPUT / L
5-5. Remote command for the parallel connection There are two ways for parallel connection remote setting：1. RS-232, 2. CAN-Bus. The RS-232 communication protocol not support broadcast function. In case of the remote control use the RS-232 port, please follow the setting steps for the SD setting. RS-232 remote communication setting： 1. Select one SD to be the Master and follow the setting： Scenario S1 S2 S3 S4 S5 S6 S7 S8 Master X X X 0 0 0 1 X Table 26.
6. RS-232 Command 6-1. RS-232 command introduction 6-1-1. RS-232 command： Command format： This unit uses high-level language commands with a CR (0DH) and LF (0AH) as the end of the command. The system would interpret and execute the command only after these two characters are received. After the unit execute the command, it would send a response string to the computer.
6-1-3.
2. OVP Recovery ：When the DC input voltage is higher than the OVP setting, the SD-series shuts-down; once the input voltage falls below the set OVP value, the SD-series will automatically restart. Default = 15 VDC @ 12V Model, 30 VDC @ 24V Model, 60 VDC @ 48V Model Model Setting value range 12 V 13 VDC ~ 15 VDC 24 V 26 VDC ~ 30 VDC 48 V 52 VDC ~ 60 VDC Table 30. OVP Recovery 3. UVP Setting ：Setting Under Voltage Protection (UVP) and Shut-down on the inverter operation.
Note The value of the voltage set for the “UV Alarm” should be equal to or higher than the value set for “UVP” or else the unit will shut-down without any audible warning. 6. O/P Voltage ：Setting the SD-series output voltage on the inverter operation. Default = 110 VAC @ 110 V Model, 230 VAC @ 230 V Model Model Setting value range 110 V 97 VAC ~ 123 VAC 230 V 194 VAC ~ 246 VAC Table 34. O/P Voltage 7.
Example2： When user setting value= Disable, the SD-series “Output frequency” is within the range of 47 Hz~63 Hz, the internal transfer relay will close. Default= 7Hz Model Setting value range 110 V 0 ~ 7 Hz 230 V 0 ~ 7 Hz Table 37. Sync Frequency 10. Overload Alarm ：Set the overload alarm. When the SD-series output power is higher than the set value, the SD-series will sound a “beep” to remind you that the unit is going to shut-down.
13. Saving Interval ：When SD-series inverter enters power saving mode, it will detect AC Load periodically. Default = 2.0 Seconds Setting range = 1.0S ~ 2.0S If the AC Load is 3 times higher than Saving Level, inverter will recover and output normally to AC Load. 14. Bypass Relay ：The setup is provided in one of the following two ways. On-line Mode or Off-line Mode ( Exacting, Normal, Haphazard). Default = Normal (Off line).
Transfer-Time Table Mode Transfer Switch ATS STS Haphazard Inverter to utility AC: 8~10ms.; Utility AC to inverter: 16~50ms. Frequency is synchronized: < 4ms.; Frequency is not synchronized: Inverter to utility AC: < 4ms.; Utility AC to inverter: 16~50ms. Normal Inverter to utility AC: 8~10ms.; Utility AC to inverter: 16~25ms. < 4ms Exacting Inverter to utility AC: 8~10ms.; Utility AC to inverter: 16~50ms. Inverter to utility AC: < 4ms.; Utility AC to inverter: 16~50ms.
18. Alert Setting ：When alert occurs, the internal dry contact relay will open/close. Default = Alert, SHDN Setting range = 0~3 Setting Menu Buzzer Setting SETT (RS-232) Alert (LCD) 0 Disable 1 SHDN 2 Alert 3 Alert , SHDN Table 45. Alert Setting 19. Language ：The SD-series have different languages available and are selectable.
7. Troubleshooting Problems and Symptoms A. Power status red light is blinking fast. B. Power status red light is Blinking slowly. Possible Cause Over input voltage. (OVP) Low input voltage. (UVP) Solutions Check input voltage. Reduce input voltage. Recharge battery. Check connections and cables. Improve ventilation. Make sure C. Power status red light is blinking Intermittently. Thermal shut-down. (OTP) ventilation, shafts of the inverter are not obstructed. Lower ambient temperature. Short circuit.
No. 33, Sec. 2, Renhe Rd., Daxi Dist., Taoyuan City 33548, Taiwan Phone：+886-3-3891999 FAX：+886-3-3802333 http：// www.cotek.com.tw 2016.10.
