Cotek SD2500-112 User manual

SD Series
Pure Sine Wave
Power Inverter
User’s Manual

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....................................................... 2
2-1. General Information 2
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 9
3-2. LED Indicator 10
3-3. DIP Switch (S1~S8) Assignment 10
3-4. DC Input - 12
3-5. DC Input + 12
3-6. Chassis Ground: Connect the wire # 8 AWG to vehicle chassis. 13
3-7. AC Output 13
3-8. By-pass AC input 13
3-9. AC input circuit breaker 13
3-10. AC output socket 13
3-11. Reset Button (only to be used for Ethernet interface) 13
3-12, 3-13. CAN1 and CAN2 Port 13
3-14. LCM Port 14
3-15. Green terminal (Remote and Parallel select) 14

3-16. RS-232 Port 15
3-17. Fan Ventilation 16
3-18. Protections Features 16
4. DC Wiring Connections.......................................................... 16
4-1. DC Input Terminals 18
4-2. Hard-wire Installation 19
5. Parallel Mode .......................................................................... 22
5-1. Prepare for Parallel Usage 22
5-2. Wiring for Parallel Usage 23
5-3. Industry Applications 25
6. RS-232 command.................................................................... 26
6-1. RS-232 command introduction 26
7. Troubleshooting...................................................................... 28
8. Warranty.................................................................................. 28

1. Important Safety Information
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
To avoid a risk of fire and electric shock, please make sure that
existing wiring is in good electrical condition; and that wire size is not
undersized. Do not operate the Inverter with damaged or
substandard wiring.
1-1-3
This equipment contains components which can produce arcs or
sparks.
To prevent fire or explosion do not install in compartments containing
batteries or flammable materials or in locations which require ignition
protected equipment. This includes any space containing
gasoline-powered machinery, fuel tanks, joints, fittings, or other
connection between components of the fuel system.
1-2. Precautions When Working with Batteries
1-2-1
If battery acid contacts skin or clothing, wash immediately with soap
and water. If acid enters eye, immediately wash eyes with running
cold water for at least 20 minutes and get medical attention
immediately.
1-2-2
Never smoke or allow a spark or flame in vicinity of battery or engine.
1-2-3
Do not drop a metal tool on the battery. The resulting spark or
short-circuit on the battery or other electrical part may cause an
explosion.
1-2-4
Remove personal metal items such as rings, bracelets, necklaces,
and watches when working with a lead-acid battery.
A lead-acid battery produces a short-circuit current high enough to
weld a ring or similar item to metal causing a severe burn.
WARNING!
Before using the Inverter, read and save the safety
instructions.

1-3. Installation
The power inverter should be installed in a location that meets the following
requirements:
1-3-1
Dry –Do not allow water to drip or splash on the inverter.
1-3-2
Cool –Ambient air temperature should be between -20℃and 50℃,
but he cooler the better.
1-3-3
Safety –Do not install batteries in the compartment or other areas
here flammable fumes existence such as fuel storage areas or
engine compartments.
1-3-4
Ventilated –Allow at least one inch of clearance around the Inverter
for air flow. Ensure the ventilation shafts on the rear and bottom of
the unit are not obstructed.
1-3-5
Dust-free –Do not install the Inverter in dusty environments here
dust, wood particles or other filings/shavings are present. The dust
can be pulled into the unit when the cooling fan is in operation.
1-3-6
Close to batteries –Avoid excessive cable lengths but do not install
the inverter in the same compartment as batteries.
Use the recommended wire lengths and sizes (see section 4-3).
Do not mount the inverter where it is exposed to the gases
produced by the battery. These gases are very corrosive and
prolonged exposure will damage the inverter.
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.
WARNING !
Shock Hazard. Before proceeding further, carefully check that the
inverter is NOT connected to any batteries, and that all wiring is
disconnected from any electrical sources . Do not connect the
output terminals of the inverter to an incoming AC source.

Features
Parallel redundancy design for power expansion
Multiple industrial applications that create 1Ф3ω / 3Ф4ω power systems
User-friendly remote control
Automatic master mechanism to eliminate single point failure and optimize
reliability
Built-in ATS and AC circuit breaker
Optional STS module, transfer time is less than 4ms.
RS-232 communication
Input & output fully isolation
Output voltage / power saving mode is selectable by DIP switch and remote
control (CR-10)
Input Protection: Reverse Polarity (Fuse) / Under Voltage / Over Voltage
Protection
Output Protection: Short Circuit / Overload / Over Temperature / Over Voltage
Protection
To get the most out of the power inverter, it must be installed and used properly.
Please read the instructions in this manual before installation and operation of this
model.
2-2. Application
2-2-1
Power tools–circular saws, drills, grinders, sanders, buffers, weed
and hedge trimmers, air compressors.
2-2-2
Office equipment –computers, printers, monitors, facsimile
machines, scanners.
2-2-3
Household items –vacuum cleaners, fans, fluorescent and
incandescent lights, shavers, sewing machines.
2-2-4
Kitchen appliances –coffee makers, blenders, ice markers,
toasters.
2-2-5
Industrial equipment –metal halide lamp, high pressure sodium
lamp.
2-2-6
Home entertainment electronics –television, VCRs, video games,
stereos, musical instruments, satellite equipment.
2-2-7
Vehicle, yacht and off-grid solar power systems.

2-3. Electrical Performance
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
Pure Sine Wave
Efficiency
(Max.)
88%
89%
90%
88%
88%
90%
Output
Voltage
(@rated VDC)
100 / 110 / 115 / 120VAC ±3%
200 / 220 / 230 / 240VAC ±3%
Output
Frequency
50 / 60Hz ±0.1%
Total
Harmonic
Distortion
(THD)
< 3% (@rated / VDC, linear load)
DC Input
DC Voltage
12VDC
24VDC
48VDC
12VDC
24VDC
48VDC
Voltage
Range
10.0~16.0
VDC
20.0~32.0
VDC
40.0~64.0
VDC
10.0~16.0
VDC
20.0~32.0
VDC
40.0~64.0
VDC
No load
Power
Consumption
@12VDC
@24VDC
@48VDC
@12VDC
@24VDC
@48VDC
On Mode @
Save Mode
0.9A
0.35A
0.3A
1.1A
0.7A
0.4A
On Mode @
No Load
Mode
< 2.9A
< 1.4A
< 0.8A
< 3.6A
< 1.8A
< 1A
Fuse
40Ax9
20Ax9
10Ax9
40Ax9
20Ax9
10Ax9
AC Input
AC Range
100 / 110 / 115 / 120VAC ±12.5%
200/220/230 /240VAC ±12.5%
Frequency
Selectable
50/60 Hz
Synchronous
Frequency
47 –57 / 53 –63 Hz
Circuit
Breaker
30A
16A
Transfer
Switch
Standard ATS : Inverter to utility AC: 8~10ms.; Utility AC to inverter:
16~50ms.
Optional STS mode : <4 ms

MODEL
SD2500-112
SD2500-124
SD2500-148
SD2500-212
SD2500-224
SD2500-248
Protection
BAT.Low
Alarm
10.5VDC
21.0VDC
42.0VDC
10.5VDC
21.0VDC
42.0VDC
BAT.Low
Shut-down
10.0VDC
20.0VDC
40.0VDC
10.0VDC
20.0VDC
40.0VDC
BAT.Low
Restart
12.5VDC
25.0VDC
50.0VDC
12.5VDC
25.0VDC
50.0VDC
BAT.High
Alarm
15.5VDC
31.0VDC
62.0VDC
15.5VDC
31.0VDC
62.0VDC
BAT.High
Shut-down
16.0VDC
32.0VDC
64.0VDC
16.0VDC
32.0VDC
64.0VDC
BAT.High
Restart
15.0VDC
30.0VDC
60.0VDC
15.0VDC
30.0VDC
60.0VDC
Input
Protection
Reverse Polarity (Fuse) / Under Voltage / Over Voltage Protection / AC
over current (Breaker)
Output
Protection
Short Circuit / Overload / Over Temperature / Over Voltage Protection
Environment
Working
Temp.
-20 ~ +60°C; refer SD2500 power de-rating curve
Storage
Temp.
-40 ~ +70°C
Relative
Humidity
Max. 90%, non-condensing
Safety & EMC
Safety
Standards
Meet UL 458
Certified EN60950-1
EMC
Standards
Certified FCC Class B
Certified EN 55014, EN 61000-3-2,
EN 61000-3-3;
EN 61000-4-2, 3, 4, 5, 6, 11
Control & Signal
LED Indicator
Input voltage level, output load level and faulty status
Remote
Control
CR-6, CR-8 and CR-10
Others
Dimension
(W x H x D)
283x128.4x436 mm / 11.146x5.056x17.156 Inch
Weight
8 kg
Cooling
Load & Thermal control fan
Communication
Port
RS-232 (RJ-11 type connector), Ethernet (Optional)
*Note: The specifications are subject to change without prior notice.
All the test environments are conducted under the rated power operation conditions.

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
Pure Sine Wave
Efficiency
(Max.)
90%
90%
91%
90%
91%
91%
Output
Voltage
(@rated VDC)
100 / 110 / 115 / 120VAC ±3%
200 / 220 / 230 / 240VAC ±3%
Output
Frequency
50 / 60Hz ±0.1%
Total
Harmonic
Distortion
(THD)
< 3% (@rated / VDC, linear load)
DC Input
DC Voltage
12VDC
24VDC
48VDC
12VDC
24VDC
48VDC
Voltage
Range
10.0~16.0
VDC
20.0~32.0
VDC
40.0~64.0
VDC
10.0~16.0
VDC
20.0~32.0
VDC
40.0~64.0
VDC
No load
Power
Consumption
@12VDC
@24VDC
@48VDC
@12VDC
@24VDC
@48VDC
On Mode @
Save Mode
1.4A
0.5A
0.5A
1.4A
0.5A
0.5A
On Mode @
No Load
Mode
< 2.9A
< 1.4A
< 0.8A
< 3.6A
< 1.8A
< 1A
Fuse
40Ax12
40Ax12
10Ax12
40Ax12
40Ax12
10Ax12
AC Input
AC Range
100/110/115 /120VAC ±12.5%
200/220/230/240VAC ±12.5%
Frequency
Selectable
50/60 Hz
Synchronous
Frequency
47 –57 / 53 –63 Hz
Circuit
Breaker
30A
16A
Transfer
Switch
Standard ATS : Inverter to utility AC: 8~10ms.; Utility AC to inverter:
16~50ms.
Optional STS mode : <4 ms

MODEL
SD3500-112
SD3500-124
SD3500-148
SD3500-212
SD3500-224
SD3500-248
Protection
BAT.Low
Alarm
10.5VDC
21.0VDC
42.0VDC
10.5VDC
21.0VDC
42.0VDC
BAT.Low
Shut-down
10.0VDC
20.0VDC
40.0VDC
10.0VDC
20.0VDC
40.0VDC
BAT.Low
Restart
12.5VDC
25.0VDC
50.0VDC
12.5VDC
25.0VDC
50.0VDC
BAT.High
Alarm
15.5VDC
31.0VDC
62.0VDC
15.5VDC
31.0VDC
62.0VDC
BAT.High
Shut-down
16.0VDC
32.0VDC
64.0VDC
16.0VDC
32.0VDC
64.0VDC
BAT.High
Restart
15.0VDC
30.0VDC
60.0VDC
15.0VDC
30.0VDC
60.0VDC
Input
Protection
Reverse Polarity (Fuse) / Under Voltage / Over Voltage Protection / AC
over current (Breaker)
Output
Protection
Short Circuit / Overload / Over Temperature / Over Voltage Protection
Environment
Working
Temp.
-20 ~ +60°C; refer SD3500 power de-rating curve
Storage
Temp.
-40 ~ +70°C
Relative
Humidity
Max. 90%, non-condensing
Safety & EMC
Safety
Standards
Meet UL 458
Certified EN60950-1
EMC
Standards
Certified FCC Class B
Certified EN 55014, EN 61000-3-2,
EN 61000-3-3;
EN 61000-4-2, 3, 4, 5, 6, 11
Control & Signal
LED Indicator
Input voltage level, output load level and faulty status
Remote
Control
CR-6, CR-8 and CR-10
Others
Dimension
(WxHxD)
283x128.4x496 mm / 11.146x5.056x19.527 inch
Weight
10 kg
Cooling
Load & Thermal control fan
Communication
Port
RS-232 (RJ-11 type connector), Ethernet (Optional)
*Note: The specifications are subject to change without prior notice.
All the test environments are conducted under the rated power operation conditions.

De-rating Curve
SD 2500
SD 3500
2-4. Mechanical Drawings
Unit:mm [inch]

3. Introduction
Front
Panel
Rear
Panel
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
LCM Port (Connection for LCD remote
control panel)
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
3-1. Power ON / OFF / REMOTE (Main) switch:
A. Before installing the inverter, please ensure the main switch is in the OFF
position.
B. Before using the remote unit, please ensure the main switch is in the
REMOTE position.

3-2. LED Indicator
Green LED
LED Signal
Status
Solid
Power OK
Slow Blink
Power Saving
Orange LED
LED Signal
Status
Fast Blink
OVP
Slow Blink
UVP
Red LED
LED Signal
Status
Intermittent Blink
- - - - - -
OTP
Fast Blink
OVP- Shut-down
Slow Blink
UVP- Shut-down
Slow Blink
OLP
Intermittent Blink
- - - -
Fan Failure
3-3. DIP Switch (S1~S8) Assignment
PIN#
PIN Assignment
1
AC output voltage setting
2
AC output voltage setting
3
AC output frequency setting
4
To set-up 3 Phase output or Energy-saving level
5
To set-up 3 Phase output or Energy-saving level
6
To set-up 3 Phase output or Energy-saving level
7
To set-up DIP Switch S4~S6 for power saving or 3 Phase output
8
To set-up function parameters adjustment via LCM or DIP switch

3-3-1 DIP switch Set-up
3-3-2 Power Saving Mode
Power Saving Mode is adjustable and set by the Dip Switches,S4, S5 and S6 on the
front panel. Example SD2500: Saving set 2%, the load is below 40W 10 sec. will into
saving mode, more than 80W or more leave saving mode.
S1
S2
S3
S4
S5
S6
S7
S8
Scenario
X
X
X
0
0
0
0
X
Power saving DISABLE
X
X
X
0
0
1
0
X
Go in power saving mode when output
load is under 2% of rating power
X
X
X
0
1
0
0
X
Go in power saving mode when output
load is under 3% of rating power
X
X
X
0
1
1
0
X
Go in power saving mode when output
load is under 4% of rating power
X
X
X
1
0
0
0
X
Go in power saving mode when output
load is under 5% of rating power
X
X
X
1
0
1
0
X
Go in power saving mode when output
load is under 6% of rating power
X
X
X
1
1
0
0
X
Go in power saving mode when output
load is under 7% of rating power
X
X
X
1
1
1
0
X
Go in power saving mode when output
load is under 8% of rating power
S1
S2
S3
S4
S5
S6
S7
S8
Scenario
0
0
X
X
X
X
X
X
AC output voltage : 100VAC/200VAC
0
1
X
X
X
X
X
X
AC output voltage : 110VAC/220VAC
1
0
X
X
X
X
X
X
AC output voltage : 115VAC/230VAC
1
1
X
X
X
X
X
X
AC output voltage : 120VAC/240VAC
X
X
0
X
X
X
X
X
AC output frequency : 50Hz
X
X
1
X
X
X
X
X
AC output frequency : 60Hz
X
X
X
X
X
X
0
X
Power saving mode setting (S4~S6); No
master-slave in parallel
X
X
X
X
X
X
1
X
3 Phase output setting (S4~S6)
X
X
X
X
X
X
X
0
Adjust function parameters via LCM
X
X
X
X
X
X
X
1
Adjust function parameters via DIP switch

3-3-3 S4~S6 Set-up for 3 Phase output
S1
S2
S3
S4
S5
S6
S7
S8
Scenario
X
X
X
0
0
0
1
X
Master (0°); "R" Phase
to be used for 1Ø 3W output in series
connection(Master) or 3Ø 4W output
connection("R" Phase)
X
X
X
0
0
1
1
X
Slave (0°) with current sharing
to be used in parallel connection only
X
X
X
0
1
0
1
X
Slave (0°), to be used for 1Ø 3W output in
series connection(L-NL-N)
X
X
X
0
1
1
1
X
Slave (180°), to be used for 1Ø 3W output
in series connection(L-NN-L)
X
X
X
1
0
0
1
X
Slave (-120°), "S" Phase
to support "S" Phasebe(-120°) in 3Ø 4W
output connection
X
X
X
1
0
1
1
X
Slave (120°), "T" Phase
to support "T" Phasebe(120°) in 3Ø 4W
output connection
X
X
X
1
1
0
1
X
Reserved
X
X
X
1
1
1
1
X
Reserved
3-3-4 Parameter select: “S8” select SD’s parameter setting by dip switch or
LCM
Set Value
S8
LCM
0
DIP SWITCH
1
3-4. DC Input - : (please refer to DC wiring connections on p.16)
3-5. DC Input + : (please refer to DC wiring connections on p. 16)

3-6. Chassis Ground: Connect the wire # 8 AWG to vehicle chassis.
3-7. AC Output : (Please refer to Hard wiring connections on p. 19)
3-8. By-pass AC input: (please refer to Hard wiring connections on p. 19)
3-9. AC input circuit breaker :
The AC input circuit breaker protects the model from overload. When an
overload condition exists, the circuit breaker stops supplying output AC grid
power. To reset it, push the circuit breaker switch then the model will be back
in normal operation. The source fault should be corrected before you reset it.
3-10. AC output socket : (please refer to Hard wiring connections on p. 19)
3-11. Reset Button (only to be used for Ethernet interface)
The Reset Button is to be used to resume the IP address to factory default
value:
Default Setting
IP
192.168.100.181
Subnet Mask
255.255.255.0
3-12, 3-13. CAN1 and CAN2 Port: (only to be used in parallel mode)
1. Before using parallel mode, you need to ensure the green terminal’s
parallel jump status is set to ON.
2. Use the RJ-45 line to link one of the SD Series CAN1 to the other CAN2.
PIN#
LCM
CAN 1
CAN 2
1
CANH
CAN_H
CAN_H
2
CANL
CAN_L
CAN_L
3
P1
Reserved
Reserved
4
VCC-
Reserved
Reserved
5
VCC+
Reserved
Reserved
6
DIS
Reserved
Reserved
7
5VS-
RND
RND
8
5VS+
Reserved
Reserved
WARNING!
Operating the inverter without a proper ground connection may
cause electrical safety hazard.

3-14. LCM Port:
Connection for LCD remote control panel, can you set and display the SD-series
operation status.
The cables should be as short as possible (less than 32.8 feet / 10 meters)
so that they can handle the signal.
3-15. Green terminal (Remote and Parallel select)
PIN#
PIN Assignment
1
GND
2
-ENB
3
ENB
4
Parallel Jump
5
Parallel Jump
LCD Remote Control Panel
SD-series
PIN Num.
Signal Description
PIN Num.
1
CANH
1
2
CANL
2
3
PON
3
4
VCC-
4
5
VCC+
5
6
DIS
6
7
5VS-
7
8
5VS+
8

3-15-1 Parallel Jump Function (please refer to section 3-6 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.
3-15-2 Remote Control Function
1. Before installing the inverter, please ensure that the main switch is in
the OFF position.
2. Before using the remote control terminal, please ensure the main
switch is in the REMOTE position.
3. Use 20 ~ 24 #AWG wire to connect the remote control terminal.
4. Remote control ON/OFF inverter setup status.
*NOTE: The above 4 methods can be used to turn ON/OFF.
3-16. RS-232 Port
RS-232 Port: Serial port monitoring and control through computer’s interface.

SD-series
Computer
PIN Num.
Signal Description
Signal Description
PIN Num.
1
Not used
Not used
1
2
GND
GND
5
3
RXD
TXD
3
4
TXD
RXD
2
5
Not used
Not used
6
Not used
Not used
The connection between this SD-series and the computer is as follows:
3-17. Fan Ventilation
The rear panel must keep the distance at least 1 inch from any surrounding
items.
3-18. Protections Features
Model
DC Input (VDC)
Over Voltage
*Over
Voltage
Alarm
Under Voltage
Under
Voltage
Alarm
Shut-down
Restart
Shut-down
Restart
12V
16± .25
15± .25
15.5± .25
10± .25
12.5± .25
10.5± .25
24V
32± .5
30± .5
31± .5
20± .5
25± .5
21± .5
48V
64± 1
60± 1
62± 1
40± 1
50± 1
42± 1
*OVA only LED prompt, no beeper alarm.
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. UVP warning occurs when DC voltage drops across the
cables from the batteries to inverter?
The longer or the narrower the cable is, the more the voltage drops. Increasing your
DC cable diameter will help to improve the situation will help improve the situation.
The following are recommended cable diameter for the best performance of the
inverter. (Applies to both 120V and 230V versions)
Model No
Wire AWG
Inline Fuse
SD2500-112 / 212
# 3/0
350 A
SD2500-124 / 224
# 1
175 A
SD2500-148 / 248
# 4
90A
SD3500-112 / 212
# 4/0
500 A
SD3500-124 / 224
# 0
250 A
SD3500-148 / 248
# 2
125 A
Connect the cables to the power input terminals on the front panel of the inverter.
The red terminal is positive (+) and black terminal is negative (-).
Insert the cables into the terminals and tighten the screw to clamp the wires
securely.
Also, only use high quality copper wire and keep the cable length short - maximum
of 3 - 6 feet.
WARNING!
1.Make sure all the DC connections are tight (torque to 11 ft-lbs,
15 Nm Max.). Loose connections could overheat and result in a
potential hazard.
2.The installation of a fuse must be on the positive cable. Failure
to place a fuse on “+” cables running between the inverter and
battery may cause damage to the inverter and will void warranty.