Cotek SR1000 User manual

PURE SINE WAVE INVERTER
SR1000 / SR1000T
User’s Manual
Telecom / Datacom

Table of Content
1. IMPORTANT SAFETY INSTRUCTIONS 1
1-1. General Safety Precautions 1
1-2. Other Safety Notes 1
1-3. Rack-Mounted Installation 2
2. FUNCTIONAL CHARACTERISTICS INTRODUCTION 3
2-1. System 3
2-2. Block Diagram 4
2-3. Electrical Performance 5
2-4. Mechanical Drawings 6
3. INSTALLATION AND MAINTENANCE 8
3-1. Rear Panel 8
3-2. Front Panel 14
3-3. Maintenance 14
4. OPERATION 15
4-1. Connecting the input power 15
4-2. Connecting the loads 15
4-3. Inverter Operation 15
4-4. Protections Features 15
5. FRONT LCD PANEL – DISPLAY & SETUP 16
5-1. LCD Panel Indications 16
5-2. Startup Sequence and Standby Status 17
5-3. Setup Menu – Operation and Instructions 18
6. RS-232 COMMUNICATION AND OPERATION 22
6-1. Operation of RS-232 Serial Port 22
6-2. Interface Commands 23
6-3. Example of the RS-232 Operation 23
7. INFORMATION 28
7-1. Troubleshooting 28
7-2. Warranty 28

1
1. Important Safety Instructions
WARNING!
SAVE THESE INSTRUCTIONS – This manual contains important
instructions that should be followed during installation and maintenance of
the inverter.
1-1. General Safety Precautions
1-1-1. Do not expose the inverter to rain, snow, spray or dust.
To reduce the risk of fire hazard, do not cover or obstruct the ventilation
openings and. do not install the inverter in a zero clearance compartment.
1-1-2. To avoid the risk of fire and electric shock, make sure that the existing wiring
is in good electrical condition; and that the wire size is not undersized.
Do not operate the inverter with damaged or substandard wiring.
1-1-3. Depending on the use, the AC output of the inverter may require user installed
breaker or fusing. For telecom use, a GFCI has not been provided. The
inverter incorporates standard AC short circuit protection.
1-1-4. The following precautions should be taken when working on the inverter
zRemove watches, rings, or other metal objects.
zUse tools with insulated handles.
zWear rubber gloves and boots.
1-1-5. If one of the following situations arises, get the equipment checked by service
personnel
zLiquid has penetrated into the equipment.
zThe equipment has been exposed to moisture.
zThe equipment has not work well or you cannot get it work according to
user manual.
zThe equipment has dropped and damaged.
zIf the equipment has obvious sign of breakage.
1-2. Other Safety Notes
1-2-1. Upon receipt, examine the shipment box for damage. Notify the carrier
immediately, before opening, if damage is evident.
1-2-2. Do not operate near water or in excessive humidity.
1-2-3. Do not open or disassemble the inverter, warranty may be voided.
1-2-4. The DC side connections should be firm and tight.
1-2-5. Grounding Reliable grounding of rack-mounted equipment should be
maintained.

2
1-2-6. Do not drop a metal tool on the battery. The resulting spark or short circuit on
the battery or on the other electrical part may cause an explosion.
1-2-7. Install the inverter in a well-ventilated area. Do not block the front air vents, or
the rear air exhausts of the unit.
1-2-8. Wiring Adequate input power must be supplied to the inverter for proper use;
correct wiring sizes must be ensured.
1-2-9. Mount the inverter such that the fan axis is horizontal.
1-2-10. Do not operate the inverter close to combustible gas or open fire.
1-2-11. Do not operate appliances that may feed power back into the inverter.
1-2-12. Temperature The inverter should be operated in an ambient temperature
range of 0 to 50 or else the output efficiency may be affected. Air flow to
the inverter must not be restricted.
1-3. Rack-Mounted Installation
Rack-Mounted Equipment – The unit is intended to be rack-mounted, the installation
instructions shall contain wording to address the following concerns when the unit is
mounted in a rack system.
1-3-1. The equipment is to be installed in an environment with maximum ambient
temperature must not exceed 50 .
1-3-2. The openings on the enclosure are for air convection hence protected the
equipment from overheating. DO NOT COVER THE OPENINGS.
1-3-3. Lay this equipment on a reliable surface when install. A drop or fall could
cause injury.
1-3-4. The equipment shall be installed according to specification as nameplate.
Make sure the voltage of the power source when connect the equipment to
the power outlet. The current of load and output power of loads shall be not
over the specification.
1-3-5. This equipment must be connected to the reliable earthing before using.
1-3-6. "Equipment intended for installation in Restricted Access Location" and Input
DC terminal at back of Rack to prevent qualified service personnel can be
touch.

3
2. Functional Characteristics Introduction
2-1. System
The unit is a highly reliable DC-AC inverter system, designed with advanced power
electronic and microprocessor technology offering the following features
zThe inverter is equipped with a self diagnosis microprocessor that is able to
identify and show all failure messages on the LED/LCD display, with associated
visual/audio alarms.
z1U height x 19” width x 13.6” depth, 19” rack mountable.
zPure sine wave output (THD < 2%) to operate higher-end electronic equipment.
zBuilt in 15A(120VAC) and 10A(250VAC) rated Bypass relay.
zSpeeds up transfer time as a result of synchronized operation with the AC
source at all times that allows the transfer to be interruption-free for sensitive
equipment.
zIntelligent software for power management.
zHard-wire and Dual AC outlets connection model option.
zLoading and temperature controlled cooling fan.
zFan aging, failure, disconnection and blockage alarm.
zSelectable Bypass/Inverter modes.
zLocal and remote management and control.
zRS-232 communication.
zDry contact terminal.
zEfficiency >90%. (Full linear load at 220VAC Output)
zAdvanced Protection Features
¾Input over/under voltage protection.
¾Internal over temperature protection.
¾Input reverse polarity protection (Fuse).
¾Output overload protection.
¾Output short circuit protection
¾AC input short circuit protection Breaker (6 Amp or 12 Amp)

4
2-2. Block Diagram
The inverter features IGBT technology which, minimizes weight and dimension,
while enhancing output short circuit reliability and overload capacity.
AC output voltage is provided in one of the two following modes
1. From DC to AC Inverter Mode (On-line Mode)
2. From AC Input Bypass Mode (Off-line Mode)
Either mode is front panel programmable.
In the first option, Off-line mode, AC output power will be supplied through the AC
bypass mode in its normal operation. Upon AC input failure, output power will be
diverted through the DC to AC Inverter Mode. Once AC mains are restored, the unit
will revert from the Inverter Mode to the Bypass Mode.
In the second option, On-line mode, AC output power will be provided directly by the
inverter from the DC source. Should the DC source or inverter fail, the system will
transfer its output power through the bypass mode. Once the DC power source is
restored, the system will revert to the inverter mode.

5
2-3. Electrical Performance
Electrical Specification Model No.
Item SR1000(T)-124 SR1000(T)-148 SR1000(T)-224 SR1000(T)-248
Output
Continuous Output Power 1000W
Maximum Output Power
(3 Min) 1100W
Surge Power 2000W
Frequency 47~63Hz ± 0.5% (User-selectable)
Output Voltage 97~123VAC (User-selectable) 194~246VAC (User-selectable)
Efficiency (Full Load) 87% 88% 90% 91%
Short-Circuit Protection Yes, lpk
Output Waveform Pure Sine Wave (THD<2%)
Input
Voltage 24VDC 48VDC 24VDC 48VDC
Input Over-Voltage Protection 30~34VDC
60~68VDC
30~34VDC
60~68VDC
60VDC Max.
(Only UL)
60VDC Max.
(Only UL)
Input Under-Voltage Protection 18~22VDC 36~44VDC 18~22VDC 36~44VDC
Voltage Range 18~34VDC
36~68VDC
18~34VDC
36~68VDC
36~60VDC
(Only UL)
36~60VDC
(Only UL)
No Load Current 1.4A 0.75A 1.3A 0.7A
Signal and
Control
LCD Panel 2 Lines LCD panel with keypad for navigation
LED Indicator Red / Orange / Green LED
Dry Contact Terminal By a relay
Remote Control Terminal Controls the inverter ON / OFF operation
Protection
Input Protection Over / Under voltage, reverse polarity (Internal fuse)
AC Output Protection Short-circuit, overload
AC Input Protection 12 Amp circuit breaker 6 Amp circuit breaker
Temperature Protection Shutdown (Internal temperature 65 )
Bypass Relay
Relay Specification 15 Amp / 120VAC, 10 Amp / 250VAC
Bypass relay selectable On Line / Off Line (Haphazard, Normal, Exacting) selectable
Switching Time From AC bypass mode (Off-line mode) 20mS
From DC to AC inverter mode (On-line mode) 8mS
Environment Working Temp.(Full load) 0 ~ 50
Storage Temp. -30 ~ 70
Safety & EMC
Safety Standards Certified UL 60950-1 Certified EN 60950-1
EMC Standards Certified FCC class B
Certified EN55022, EN61000-3-2,
EN61000-3-3, EN55024,
IEC61000-4-2,3,4,5,6,8,11
Fan Operation
& Indicator
Failure Indicator Buzzer alarm and dry contact
Switches On When Internal Temperature 55 or Load 30%
Switches Off When Internal Temperature 45 and Load 20%
Others
Dimension (WxHxD) 483 x 44 x 395 mm / 19.02 x 1.73 x 13.55 inch
Packing 7.46kg; 2pcs / 15.9kg / 1.74 CUFT
Application Focus on telecommunication (base-station), networking (data center) &
battery backup system.
Note The specifications are subject to change without notice.

6
2-4. Mechanical Drawings
Unit mm [inch]
2-4-1. SR1000 Mechanical Drawings
420 [16.54]
121.0 [4.76] 92.0 [3.62] 92.0 [3.62]
21.8
[0.86]
345 [13.58]
6-M3
24.0 [0.94]
345 [13.58]
395 [15.55]
5.9 [0.23]
44 [1.73]
465.0 [18.31]
483 [19.02]
39.3 [1.55] R3.5 [R0.14]
10.0 [0.39]
39.3 [1.55]
31.8
[1.25]
< SR1000 110V
< SR1000 220V

7
2-4-2. SR1000T Mechanical Drawings
SR Series Inverter Ordering Information
Model Number Input
VoltageOutput Voltage NominalOutput Voltage RangeFrequency Range
SR1000/SR1000T-12424 VDC 110 VAC100~120 VAC47~63 Hz
SR1000/SR1000T-224 24 VDC 230 VAC200~240 VAC47~63 Hz
SR1000/SR1000T-148 48 VDC 110 VAC100~120 VAC47~63 Hz
SR1000/SR1000T-24848 VDC 230 VAC200~240 VAC47~63 Hz
420 [16.54]
345 [13.58]
24 [0.94]
395 [15.55]
121.0 [4.76] 92.0 [3.62]92.0 [3.62]
21.8
[0.86]
6-M3
5.9 [0.23] 465.0 [18.31]
483 [19.02]
10.0 [0.39]
Ø7.0 [Ø0.28]
R3.5 [R0.14]
39.3 [1.55]
39.3 [1.55]
31.8 [1.25]
44 [1.73]
< SR1000T 110V
< SR1000T 220V

8
3. Installation and Maintenance
3-1. Rear Panel
No. Description No. Description No. Description
①DC Input Negative(-) ④Dry Contact Terminal ⑦AC Output Socket
②DC Input Positive(+) ⑤Standard RS-232 ⑧AC Input Socket /
AC Input Terminal
③Remote Contact
Terminal ⑥Chassis Ground ⑨AC Output Breaker
3-1-1. DC Input Connection ①②
Follow the instructions to connect the battery cables to the DC input terminals of
the inverter. The cables should be as short as possible (less than 6 feet / 1.8
meters ideally) so that they can handle the required current in accordance with the
Electrical Codes and Regulations. The size of the cable should be thick enough to
limit the voltage drop to less than 2% when carrying the maximum input current
to prevent frequent low-input voltage warnings, and shutdown. UVP (Under
Voltage Protection) warning may result if there is excessive voltage drop across
the DC cables between the batteries and the inverter. Increasing your DC cable
size will help improve the situation.
Batteries are capable of providing very large currents in case of short circuit. In
case there is a short circuit in the cable run between the batteries and the input
terminals of the inverter, it will result in overheating / melting of the cables and
consequent risk of fire and injury, To prevent possibility of this hazard, use Very
Fast Acting DC Fuse in line with the positive cable. The fuse should be as close to
the positive battery terminal as possible. Use Bussmann ANN series fuses
SR1000T
SR1000
12 3 4 5 6 7 8 9
1 2 3 4 5 6 7 8 9

9
( will also require Fuse Block 4164) or equivalent.
The following sizes of cables and fuses are recommended for up to 6 ft. distance
between the batteries and the inverter. (Applies to both 120 VAC and 230 VAC
versions)
Model No. Wire AWG Inline Fuse
A084#422/421-T0001RS/0001RS A046#842/841-T0001RS/0001RS
Connect DC input terminals to 24V / 48V battery or other DC power source.
[ + ] is positive, [ - ] is negative. Reverse polarity connection can blow the
internal fuse and may damage the inverter permanently.
WARNING!
Make sure that all the DC connections are tight (torque to 9 – 10 ft-lbs,
11.7 – 13 Nm). Loose connections could result in overheating and can be
a potential hazard.
WARNING!
The recommended inline fuse should be installed as close to the battery
positive terminal as possible Failure to use a fuse on the “+” cable running
between the inverter and battery may cause damage to the cable /
inverter and will void warranty.
Also, only use high quality copper wire and keep the cable length short which is a
maximum of 3 - 6 feet.
M8 SCREW
PVC WIRE
(AWG#4 - #6) POSITIVE +
RING
TERMINAL
PVC WIRE
(AWG#4 - #6) RING
TERMINAL NEGATIVE -

10
3-1-2. Remote control and Dry contact terminal ③④
Remote Control Terminal ③
1. Before installing the inverter, ensure that the main switch “OFF”.
2. Before using the remote function, ensure that the main switch pressed
toward “REMOTE”.
3. Ensure that the remote contacts are off.
4. Use 20 ~ 24 #AWG wire to connect the remote control terminals.
5. Remote control ON/OFF inverter setup status
INLINE FUSE
BATTERY
Normally Open
RELAY
COM.
NO
NC
ENB ENB
GND
Remote Control Terminal Dry Contact Terminal
Common
Normally Closed
GOUND
ENABLE -
ENABLE +
POSITIVE +
NEGATIVE -

11
Note At one time, only one remote function should used to control the inverter.
The maximum voltage value is 60VDC.
Dry Contact Terminal Relay
tcatnocnommoC.MOC tcatnocdesolcyllamroN.C.N tcatnocnepoyllamroN.O.N
Dry Contact Terminals ④
Dry contact terminals may be connected to a Form C relay for “FAULT”
indication. When “FAULT” occurs, the relay switches.
Note Fault conditions include Input under/over voltage, Output Short Circuit,
Over Temperature, Over-load and, Fan Failure.
Specifications of the Relay
Maximum
VoltageLoadContact Rating Number of operations
Operating/Storage
Temperature
N.O. N.C.
240 VAC Resistive 16 A ─100,000
-30~70
240 VAC Resistive ─8 A ─
30 VDC Resistive 16 A ─ ─
30 VDC Resistive ─8 A ─
3-1-3. Standard RS-232 ⑤Serial port monitoring and control through computer
interface.
3-1-4. Chassis Ground ⑥Must be connected to earth ground prior to making any
other connections to the equipment.
GND
TR
OFF : INV. OFF
ON : INV. ON
ENB
BAT+
BAT- +
-DC
POWER
GND
ENB
OFF : INV. OFF
ON : INV. ON
ENB
OFF : INV. OFF
ON : INV. ON LOW : INV. OFF (TR OFF) HI : INV. ON (TR ON)
GND
ENB

12
3-1-5. AC output socket⑦
3-1-6. AC wiring connections⑧
SR1000T AC input and AC output terminal
110VAC
NEMA I.E.C 60320 C13
230VAC
FG
FG
L N
FG
AC INPUT
BREAKER
RL2
RL3
BYPASS RELAY
N
L
INVERTER
"L" INVERTER
"N"
L
N
LN
FG
AC output receptacles
for 120VAC version
(NEMA5-15R)
AC Input Receptacle
(IEC 60320 C 14)
AC output sockets for 230VAC
output version
(IEC 60320 C 13 receptacles)
or
SR1000：AC socket
TRANSFER RELAY
CASE
INVERTER / L
INVERTER / N
CONNECTOR
AC INPUT / N
(GRID)
AC OUTPUT / N
(LOAD)
AC OUTPUT / L AC INPUT / L
GND
AC INPUT
BREAKER

13
zConnect AC input wiring to the inverter socket.
Please use the following information as your reference.
SR1000 Version
Socket Wire color Wire length / gauge
120 VAC 230 VAC
AC Output Line (L) NEMA I.E.C C13
Within 16 feet / AWG # 14~16
26~32 feet / AWG # 12~14
Neutral (N)
AC Input Line (L) I.E.C C14
Neutral (N)
Chassis Ground Green / Yellow or Bare copper
Note Please double check and review all the connections to ensure that the wires
are connected to the correct inlet.
SR1000T Version
Socket Wire color Wire length / gauge
120 VAC 230 VAC
AC Output Line (L) Black Brown
Within 16 feet / AWG # 14~16
26~32 feet / AWG # 12~14
Neutral (N) White Blue
AC Input Line (L) Black Brown
Neutral (N) White Blue
Chassis Ground Green / Yellow or Bare copper
Note Please double check and review all the connections to ensure that the wires
are connected to the correct terminals and that the connections are tight.
3-1-7. AC input breaker ⑨
The AC input circuit breaker protects the unit from overload. When an overload
condition occurs, the circuit breaker trips and disconnects the AC grid power input.
To reset it, push the circuit breaker button. The cause of tripping should be
ascertained and corrected before the unit is reset .

14
3-2. Front Panel
No. Description No. Description No. Description
AMain Switch CLCD DisplayEFan Ventilator
BLED Indicators DLCD Display Selection Buttons
3-2-1. Main Switch AThese are the 3-stage rocker switches for turning on, turning
off and remote mode.
3-2-2. LED IndicatorsBSee details in Section 5-1.
3-2-3. LCD Display Selection ButtonsD
Data pertaining to the DC input voltage, AC output voltage, AC output
frequency, AC output current, etc. and system status can be shown
sequentially on the LCD display by pressing these buttons. Please refer to
chapter 5 for more information.
3-2-4. FAN Ventilation EThe fans behind the ventilation grilles providescooling.
DOT NOT obstruct these vents!
3-3. Maintenance
3-3-1. Make sure that the fan vents are not blocked.
3-3-2. Use a vacuum cleaner to remove any dust from the fan area.
3-3-3. When cleaning the case or front panel, use a soft, dry cloth, only. If the case
or front panel is very dirty, use a neutral, non-abrasive detergent. Do not use
alcohol or ammonia based solutions.
3-3-4. Regular service, and relocation of the inverter, should be performed by a
qualified service technician.
3-3-5. Avoid spilling liquid on the inverter.
A B C D E

15
4. Operation
4-1. Connecting the input power
Before making the DC input side connections, the main switch must be “OFF”.
4-2. Connecting the loads
zCalculate the total power consumption(W) of the output load. Make sure that the
total power consumption does not exceed the rated load.
zShould the total load exceed the rated capacity of the inverter, remove the
non-critical loads until the rated total has been reached.
4-3. Inverter Operation
zSet the power switch to the “ON” position. The buzzer will sound “beep beep”. The
inverter will carry out self-diagnosis and the LED will also appear various colors.
At the same time the LCD will display ”SR-1000 INVERTER INITIALIATION.”.
Finally, the buzzer will sound another “beep” and the “INVERTER” and status LED
will turn “Green”. The LCD Display will display “Vi, Vo, FQ, Io“.
The inverter will start operating normally.
zSet the power switch to the “OFF” position. THE, inverter stops and all the lights
that are on will, go off.
4-4. Protections Features
Model
DC Input (VDC) Over Temperature Protection
Over Voltage Under
Voltage
Alarm
Under Voltage INTERIOR HEAT SINK
Shut-down Restart Shut-down Restart Shut-down Restart Shut-down Restart
24V 30.1~34.1 28~32 19~23 18.1~22.1 23~27 65 45 105 75
48V 60.1 56~60 38~46 36.1~44.1 46~54

16
5. Front LCD Panel – Display & Setup
5-1. LCD Panel Indications
5-1-1. Set the Power Switch to the “ON” position. THE, inverter starts working
normally. The inverter will be operating in normal condition when either of the
following messages are displayed on the LCD screen
5-1-2. LED Indications
AC GRID Displays AC input status.
AC InputLED Status
AC input and DC-AC Inverter Output are Synchronous Green
egnarONOtupniCA ffOFFOtupniCA
Note Synchronous means that the grid AC input frequency and DC-AC inverter
output frequency or phase are the same (See details in Section 5-3-3).
INVERTER Displays DC-AC inverter status.
DC-AC Inverter LED Status
Power OK Green
Power NotGood Red
BYPASS Displays Bypass relay status.
Bypass LED Status AC Output (Load)
From DC-AC inverter
(On-line Mode) Orange AC Input
Off DC-AC Inverter
From AC input bypass
(Off-line Mode) GreenAC Input
Off DC-AC Inverter
ALARM Displays status of the Failure Alarm.
Alarm LED Status
egnarOmralANAF/mralArednU/revO
Set alarm in the inverter to operate normally off
Note For instructions on setting the alarm, see details in Section 5-3.
FQ=60.0 Io =8.5
Vi =24.0 Vo=115
LED
INDICATORS LCD
DISPLAY LCD DISPLAY
SELECTION BUTTONS

17
5-1-3. LCD Display Selection Buttons
Function of Various Keys
Function <Up> You can use the “up” button to scroll through the menus.
or to select the value for set up under setting mode.
Function <Page Up>You can use the “Page Up” button to scroll through
the menus.
Function <Page Down>You can use the “Page Down” button to scroll
through the menus.
Function <Enter Setup Menu>Press the button longer than 2 seconds,
the inverter will change to “Setup Menu Mode” which appears on the LCD
screen for the user to set functions.
Function <Enter>Confirms a selection or value.
5-1-4. LCD Display Displays inverter’s operational status.
5-2. Startup Sequence and Standby Status
5-2-1. Once turn on the inverter, the display shows “SR-1000 INVERTER
INITIALIATION.”, then checks the inverter.
Status flow is as follows
Fan Failure!!
Alert:
Overload!!
Alert: OR
OR
1Sec
Exchange
Alert:
Undervoltage!!
Vi =XX.X Vo=XXX
FQ=XX.X Io =X.X
FQ=XX.X Io =X.X
Vi =XX.X Vo=XXX
ALARM
OK
Vi =XX.X
OLP Shutdown
OR
Vi =XX.X
OTP Shutdown
OR
OR
OVP Shutdown
Vi =XX.X
Vi =XX.X
UVP Shutdown
FAILURE CHECK INVERTER
SR-1000 INVERTER
INITIALIATION ..
ONOFF POWER SWITCH
LCD OFF