Cotek SR series, SR1000T-124, SR1000T-148, SR1000T-224, SR1000T-248 User Manual

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SR Series

1KW Pure Sine Wave Power Inverter

User ’s Manual

Page 2

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Contents

Important Safety Instructions…………………………………………………………………….

1-1 General Safety Precautions..………………………………………………………………… 3

1-2 Other Safety Notes..……………………...…………………………………………………… 3

Rack-Mounted Installation…………...………………………………………………….........

Functional Characteristics Introduction ...…………………………………………………….

2-1 System...………………………………………………………………………………………..

2-2 Block Diagram.…………………..…………………………………………………………….

2-3 Electrical Performance…..…………………………………………………………………….

2-4 Mechanical Drawings..………………………………………………………………………...

Installation and Maintenance….………………………………………………………………….

3-1 Rear Panel…...…..…………………………………………………………………………….

3-2 Front Panel..……..……………………………………………………………………………..

3-3 Maintenance…….………..……….…………………………………………………………....

Operation…………………………………………………………………………………………….

4-1 Connecting the Input Power…………………………………………………………………..

4-2 Connecting the Loads..………………………………………………………………………..

4-3 Inverter Operation...………..………………………………………………………………….

4-4 Protection Features…………………………………………………………………………….

Front LCD Panel Display and Setup…………………………………………………………….

5-1 LCD Panel Indications………….……………………………….…………………………….

5-2 Startup Sequence and Standby Status…..……….……………..…………………………..

5-3 Setup Menu Operation and Instructions……………………………..……………………...

RS232 Communication and Operation…..……………………………………………………..

6-1 Operation of the RS-232 Serial Port..……. ………………………….……………………..

6-2 Interface Commands..……………………………………………..…………………………..

6-3 Example of the RS232 Operation……………………………………………………….……

1-3

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without the express permission of the owner.

7. Information…………………………………………………………………………………………..

7-1 Troubleshooting……………………………………………………………………………….. 29

7-2 Warranty……………………………………………………………………………………...... 29

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SR Series Inverter

1. Important Safety Instructions

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 zeroclearance 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:

Remove watches, rings, or other metal objects. Use tools with insulated handles. Wear rubber gloves and boots.

1-1-5. If one of the following situations arises, get the equipment checked by

service personnel: a. Liquid has penetrated into the equipment. b. The equipment has been exposed to moisture. c. The equipment has not work well or you can not get it work according to user‘s manual. d. The equipment has dropped and damaged. e. If the equipment has obvious sign of breakage.

WARNING!

SAVE THESE INSTRUCTIONS – This manual contains important instructions that should be followed during installation and maintenance of the inverter.

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.

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SR Series Inverter

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.

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

may be affected. Air flow to the inverter must not be restricted.

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.

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.

Wiring: Adequate input power must be supplied to the inverter for

temperature range of 0

°C to 50°C or else the output efficiency

1-3. Rack-Mounted Installation

1-3-1. "Equipment intended for installation in Restricted Access Location" and Input DC terminal at back of Rack to prevent qualified service personnel can be touch.

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.

A. “The equipment is to be installed in an environment with maximum ambient temperature must not exceed 50

°C.”

B. “The openings on the enclosure are for air convection hence protected the equipment from overheating. DO NOT COVER THE OPENINGS.” C. “Lay this equipment on a reliable surface when install. A drop or fall could cause injury.” D. “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.” E. “This equipment must be connected to the reliable earthing before using.”

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SR Series Inverter

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:

The 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.

1U height x 19” width x 13.6” depth, 19” rack mountable.

Pure sine wave output (THD < 2%) to operate higher-end electronic equipment.

Built in 15A (120VAC) AND 10A (250VAC) rated Bypass relay.

Speeds 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.

Intelligent software for power management.

Hard-wire and Dual AC outlets connection model option.

Loading and temperature controlled cooling fan.

Fan aging, failure, disconnection and blockage alarm.

Selectable Bypass/Inverter modes.

Local and remote management and control.

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SR Series Inverter

RS-232 communication.

Dry contact terminal.

Efficiency >90%. (Full linear load at 220VAC Output)

Advanced Protection Features:

Input over/under voltage protection.

Internal over temperature protection.

Input reverse polarity protection (Fuse).

Output overload protection.

Output short circuit protection.

AC input short circuit protection: Breaker (6 Amp or 12 Amp)

2-2. Block Diagram

AC GRID

INPUT

FILTER

OUTPUT

BYPASS RELAY

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.

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SR Series Inverter

2-3. Electrical Performance

Note: The specifications are subject to change without notice.

Electrical

Specification

Item

Model No.

Output

Input

Continuous Output Power

Voltage

Input Over-Voltage Protection

Input Under-Voltage Protection

Voltage Range

No Load Current

LCD Panel

LED Indicator

Dry Contact Terminal

Remote Control Terminal

Input Protection

AC Output Protection

AC Input Protection

Temperature Protection

Relay Specification

Bypass relay selectable

Switching Time

Working Temperature

(Full load)

Storage

Failure Indicator

1000W

SR1000T-124 SR1000T-148 SR1000T-224 SR1000T-248

2000W

Yes, lpk

Pure Sine Wave (THD<2%)

24VDC

30~34VDC 30~34VDC60VDC Max. 60VDC Max.

18~22VDC 18~22VDC36~44VDC 36~44VDC

18~34VDC 18~34VDC36~60VDC 36~60VDC

1.4A 1.3A0.75A 0.7A

2 Lines LCD panel with keypad for navigation

Input voltage level, output load level and faulty status

By a relay

RJ-11

Over / Under voltage, reverse polarity (Internal fuse)

Short-circuit, overload

Shutdown (Internal temperature ≧ 65

12 Amp circuit breaker

15Amp / 120VAC, 10Amp / 250VAC

On Line / Off Line (Haphazard, Normal, Exacting) selectable

From AC bypass mode (Off-line mode) : ≦ 20mS

From DC to AC inverter mode (On-line mode) : ≦ 8mS

C ~ 50oC

-30

C ~ 70oC

Buzzer alarm and dry contact

Switches On When

Safety Standards

EMC Standards

Switches Off When

Dimension

(WxHxD)

Packing

Application

Internal Temperature ≧ 55

C or Load ≧ 30%

Certified UL 60950-1 Certified EN 60950-1

Certified FCC Class B

Certified EN55022, EN61000-3-2,

EN61000-3-3, EN55024,

IEC61000-4-2,3,4,5,6,8,11

Internal Temperature ≦ 45

C and Load ≦ 20%

483 x 44 x 395 mm / 19.02 x 1.73 x 13.55 inch

7.46kg; 2pcs / 15.9kg / 1.74 CUFT

Focus on telecommunication (base-station), networking (data center) & battery backup system.

6 Amp circuit breaker

48VDC 24VDC 48VDC

87% 88% 90% 91%

97~123VAC (User-selectable) 194~246VAC (User-selectable)

47~63Hz ± 0.5% (User-selectable)

1100W

Maximum Output Power

(3 Min)

Surge Power

Frequency

Output Voltage

Efficiency

(Full Load)

Short-Circuit Protection

Output Waveform

Signal and Control

Protection

Bypass Relay

Environment

Fan Operation &

Indicator

Others

Safety & EMC

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SR Series Inverter

2-4. Mechanical Drawings

SR Series Inverter Ordering Information

Input

Voltage

Output Voltage

Nominal

Output Voltage

Range

Frequency

Range

Model

Number

SR1000T-124 24 VDC 110 VAC 100~120 VAC 47~63 Hz SR1000T-224 24 VDC 230 VAC 200~240 VAC 47~63 Hz SR1000T-148 48 VDC 110VAC 100~120 VAC 47~63 Hz SR1000T-248 48 VDC 230VAC 200~240 VAC 47~63 Hz

OFF

REMOTE

AC GRID

INVERTER

BYPASS

ALARM

PURE SINE WAVE INVERTER

GND

ENB

ENBNCNO

COM.

INV. FAILURE

RS-232

OUTPUT

LN FG L N

AC OUTPUT

AC INPUT

BREAKER

CHASSIS

GROUND

WARNING:

POS(+)NEG(-)

REVERSE POLARITY

WILL DAMAGE UNIT

420[16.54]

24[0.94]

21.8[0.86]

39.3[1.55]

5.9[0.23] 483[19.02]

465.0[18.31]

39.3[1.55] R3.5[R0.14]

10.0[0.39]

44[1.73]

31.8[1.25]

M3*6

345[13.58]

395[15.55]

92.0[3.62] 92.0[3.62]120.0[4.72]

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SR Series Inverter

3. Installation and Maintenance

3-1. Rear Panel

REAR PANEL VIEW

3-1-1. AC Input Breaker:

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 .

3-1-2. Hard-wire Installation (AC wiring connections):

AC input and AC output terminal

Connect AC output and AC input wiring to the Inverter terminals. Please use the following information as your reference:

GND

ENB

COM.

INV. FAILURE

RS-232

OUTPUT

N L FG L N

AC OUTPUT

AC INPUT

AC INPUT BREAKER

CHASSIS GROUND

WARNING:

POS(+)NEG(-)

REVERSE POLARITY WILL DAMAGE UNIT

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SR Series Inverter

Terminal

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.

3-1-3. AC output socket:

110VAC

NEMA

230VAC

I.E.C 60320 C13

3-1-4. Chassis Ground: Must be connected to earth ground prior to

making any other connections to the equipment.

3-1-5. RS-232: Serial port monitoring and control through computer interface.

3-1-6. Remote control and Dry contact terminal:

Normally Open

RELAY

COM.

ENB

GND

Remote Control Terminal Dry Contact Terminal

Common

Normally Closed

GOUND

ENABLE -

ENABLE +

▌Remote Control Terminal:

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SR Series Inverter

Remote Control Terminal:

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:

NOTE: At one time, only one remote function should used to control the inverter.

The maximum voltage value is 60VDC.

Dry Contact Terminals:

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

Voltage

Load

Contact 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

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SR Series Inverter

Remote Control Terminal:

Dry Contact Terminal Relay

COM. Common contact

N.C. Normally closed contact N.O. Normally open contact

3-1-7. DC Input Connection:

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 ( 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

# 4 80 A SR1000T-124 / 224

SR1000T-148 / 248 # 6 40 A

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.

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SR Series Inverter

RIN G TER MINA L

PVC WI RE

(AW G#4 - #6)

RIN G TER MINA L

PVC WI RE

(AW G#4 - #6)

NEG ATIVE-

POS ITIVE +

Also, only use high quality copper wire and keep the cable length short which is a maximum of 3 - 6 feet.

INLINE FUSE

NEGATIV E-

PO SITI VE+

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.

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SR Series Inverter

3-2. Front Panel

FRONT PANEL VIEW

OFF

REMOTE

Vi =24.0 Vo=115

FQ=60.0 Io =8.5

3-2-1. Main Switch: These are the 3-stage rocker switches for turning on, turning off

and remote mode.

3-2-2. LED’s Indicators: See details in Section 5-1.

3-2-3. LCD Display Selection Buttons:

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 grille (1)~(3): The fans behind the ventilation grilles provides

cooling. 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.

4. Operation:

4-1. Connecting the input power

Before making the DC input side connections, the main switch must

be “OFF”.

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SR Series Inverter

4-2. Connecting the loads

Calculate the total power consumption(W) of the output load. Make sure that

the total power consumption does not exceed the rated load.

Should 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

Set the power switch to the “ON” position. The buzzer will sound “beep beep”. The inverter will carry out self-diagnosis and, the LED’s 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’s will turn “Green”, The LCD Display will display “Vi, Vo, FQ, Io“. THE, inverter will start operating normally.

Set 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

Shutdown

Restart

Shutdown

Restart

24 V 30.1~34.1 28~32 19~23 18.1~22.1 23~27

45 105 75

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:

FQ=60.0 Io =8.5

Vi =24.0 Vo=115

48 V 56~60 38~46 36.1~44.1 46~5460.1

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SR Series Inverter

5-1-2. LED Indications:

AC GRID: Displays AC input status.

AC Input LED Status

AC input and DC-AC Inverter

Output are Synchronous

Green

AC input ON Orange

AC input OFF Off

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 Not Good Red

BYPASS: Displays Transfer Switch 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)

Green AC Input

Off DC-AC Inverter

ALARM: Displays status of the Failure Alarm.

Alarm LED Status

Over/Under Alarm

/FAN Alarm

Orange

Set alarm in the inverter to

operate normally

Off

NOTE. For instructions on setting the alarm, see details in Section 5-3.

5-1-3. LCD Display Selection Buttons:

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SR Series Inverter

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 <Down>: You can use the “Down” 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:

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SR Series Inverter

Fan Failure!!

Alert:

Overload!!

Alert:

1Sec Exchange

Alert:

Undervoltage!!

Vi =XX.X Vo=XXX

FQ=XX.X Io =X.X

Vi =XX.X Vo=XXX

ALARM

Vi =XX.X

OLP Shutdown

Vi =XX.X

OTP Shutdown

OVP Shutdown

Vi =XX.X

UVP Shutdown

FAILURE

CHECK INVERTER

SR-1000 INVERTER

INITIALIATION ..

ONOFF

POWER SWITCH

5-3. Setup Menu – Operation and Instructions

Entering Setup Menu:

Press

Button longer than 2 seconds. The inverter, enters the

Setup Menus consisting of three layers:

(1)Select Menu Heading: (2)Select Menu Item: (3)Setting Value:

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SR Series Inverter

Vi =XX.X Vo=XXX

FQ=XX.X Io =X.X

Main Menu:

Select

Menu:

User interface

Select Menu:

I/P Parameter

Select Menu:

O/P Parameter

Select Menu:

RST to default

Select Menu:

Select Item:

LCD Contrast

Select

Item:

Select Item:

LCD Auto-off

Select Item

RS232 Baudrate

Select Item:

Buzzer Setting

Select Item:

Alert Setting

0 1 2 3 4 6

8 9 10 11 12 13 14 15

Function

Code:

OVP Setting

Select Item:

OVP Recovery

Select Item:

UVP Setting

Select Item:

UVP Recovery

Select Item:

UV Alarm

Select Item

O/P Voltage

Select Item:

O/P Frequency

Select Item:

Sync Frequency

Select Item

Bypass relay

Select Item:

Overload Alarm

Select Item:

50%

LCD Contrast:

Setting

Value:

LCD Auto-off:

120S

RS232 Baudrate:

4800

Buzzer Setting:

MSG , Alert , SHDN

Alert Setting:

Alert , SHDN

OVP Setting:

32.00V

30.00V

OVO Recovery:

20.00V

UVP Setting:

25.00V

UVP Recovery:

21.00V

UV Alarm:

O/P Voltage:

230V

O/P Frequency:

50.00Hz

Sync Frequency:

7.00Hz

Bypass relay:

On-line

Overload Alarm:

100%

5-3-1. User interface (Select Menu):

0). LCD Contrast: Sets LCD screen contrast. Default=50% Setting Range= 0%~100%

1). LCD Auto-off: Sets LCD auto off timer. Default=120 seconds. Setting Range= Disable~250 seconds.

2). RS232 Baud-rate: Sets standard RS-232 Baud-rate. Default=4800 Setting Range= 1200/2400/4800/9600

3). Buzzer Setting: Sets the internal buzzer sound ON/OFF. When setting, the LCD screen display,

Buzzer “ON”, Buzzer “OFF”.

Default=MSG, Alert, SHDN

Setting Range= Disable / Shutdown / Alert

/ Alert, SHDN / Message / Message, SHDN / Message, Alert / MSG, Alert, SHDN

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SR Series Inverter

Menu Status Buzzer

Message Power ON or Push Keypad ON

Alert FAN Fail or UV Alarm or Overload Alarm ON

Shutdown OVP or UVP or OLP or OTP ON

Disable Any OFF

4). Alert Setup: When alert occurs, the internal Dry Contact Relay will open / close. (See details in Section 3-1-6)

Default= Alert, SHDN

Setting Range= Disable / Shutdown / Alert / Alert, SHDN

Menu Status Relay

Alert FAN Fail or UV Alarm or Overload Alarm ON

Shutdown OVP or UVP or OLP or OTP ON

Disable Any OFF

5-3-2. I/P Parameter (Select Menu):

6). OVP Setting: Sets the Over Voltage Protection (OVP) and shutdown. Default= 34 VDC for 24 V Model, 60 VDC for 48 V Model

Model Setting Value Range

24 V 30 VDC ~ 34 VDC 48 V

7). OVP Recovery: When the DC input voltage is higher than the OVP setting, the inverter shuts-down; Once the input voltage falls below the set OVP value, the inverter will automatically restart. Default= 30 VDC for 24 V Model, 56 VDC for 48 V Model

Model Setting Value Range

24 V 28 VDC ~ 32 VDC 48 V 56 VDC ~ 60 VDC

8). UVP Setting: Setting the inverter’s Under Voltage Protection (UVP) and Shutdown. Default= 18 VDC for 24 V Model, 36 VDC for 48 V Model

Model Setting Value Range

24 V 18 VDC ~ 22 VDC 48 V 36 VDC ~ 44 VDC

9). UVP Recovery: When the DC input voltage is below the set UVP value the inverter shuts-down; Once the input voltage rises

above the set UVP value, the inverter will automatically

restart.

Default= 25 VDC for 24 V Model, 50 VDC for 48 V Model

60 VDC MAX.

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SR Series Inverter

Model Setting Value Range

24 V 23 VDC ~ 27 VDC 48 V 46 VDC ~ 54 VDC

10). UV Alarm: Sets Under Voltage (UV) alarm. When the input voltage is lower than the set value, the unit will sound “beep” to remind that the unit is going to shutdown. At the meantime, the

contact in the internal Dry Contact Relay will open / close

(See details in Section 3-1-6).

Default= 21 VDC for 24 V Model, 42 VDC for 48 V Model

Model Setting Value Range

24 V 19 VDC ~ 23 VDC 48 V 38 VDC ~ 46 VDC

NOTE. The value of voltage set for the “UV Alarm” should be equal to or

higher than the value set for “UVP” or else the unit will shutdown without any audible warning.

5-3-3. O/P Parameters:

11). O/P Voltage: Set the inverter output voltage. Default= 110 VAC for 110 V Model, 230 VAC for 220 V Model

Model Setting Value Range

110 V 97 VAC ~ 123 VAC 220 V 194 VAC ~ 246 VAC

12). O/P Frequency: Set the inverter output frequency. Default= 60 Hz for 110 V Model, 50 Hz for 220 V Model.

Model Setting Value Range

110 V 47 Hz ~ 63 Hz 220 V 47 Hz ~ 63 Hz

13). Sync Frequency: Sets the AC output synchronous frequency. Example: AC input= 230 VAC / 50Hz,User setting Value= 7Hz

When the DC to AC inverter “Frequency” is within The Range of 43 Hz~57 Hz, the internal transfer relay will operate normally. When the “Frequency” is less than 43 Hz or more than 58 Hz, the internal transfer relay will de-energize. (See details in Section 2-2) Default= 0.1Hz ~ 7Hz.

Model Setting Value Range

110 V 0.1 Hz ~ 7 Hz 230 V 0.1 Hz ~ 7 Hz

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SR Series Inverter

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).

Mode Menu

Transfer Relay

Switching Feature

OFF LINE

(See details in Section 5-3)

Exacting

The transfer relay will switch “ON” or “OFF” based on conformance to, the Phase and Sync Frequency window that has been set (Function Code 13)

Normal

The transfer relay will be “ON” if AC input (Grid) power is available. The DC-AC inverter will remain synchronized and Phase with the incoming AC power (Grid). The relay will NOT switch off if the grid frequency is beyond the range set under Sync Frequency window (Function Code 13).

Haphazard

The transfer relay will switch “ON” or “OFF”. Conformance to, phase and frequency synchronization will not be considered.

ON LINE --------- (See details in Section 5-3)

Frequency

Synch ronous

DC -AC inv erter

AC input (G RID)

Phase

AC input (G RID)

DC -AC inv erter

Phase Synchronous

Phase

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SR Series Inverter

15). Overload Alarm: Sets the overload alarm. When the output power is higher than the set value, the unit will sound “beep”

to remind that the unit is going to shutdown. At the same time, the internal Dry Contact Relay will open/close (See details in Section 3-1-6). Default= 100% Setting range= 50%~110%

6. RS-232 Communication and Operation

6-1. Operation of the RS-232 Serial Port:

6-1-1. This unit uses a standard 9-Pole D connector and three of the RS232 signal

lines:

1 2 3 4 5

6 7 8 9

Signal description PIN

N.C 1 RXD 2 TXD 3 DTR 4

GND 5

DSR 6

RTS 7 CTS 8

N.C 9

6-1-2. The connection between this unit and the computer is as follows:

Computer

Power Inverter

RXD

GND

DXTDXT

GND

RXD

DSR

RTS

DTR

CTS

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SR Series Inverter

6-1-3. The RS232 interface of this unit employs ASCII code to implement the

asynchronous serial transmission control.

The byte structure is START-BIP – 8 BIT DATA-STOP BIT.

Baud rate: 1200/2400/4800/9600(See details in Section 5-3-1).

6-1-4. Coupled with PC software application port. Operation is as detailed in

Section 6-2.

6-2. Interface Commands:

The buffer size used for the RS232 port is 12-byte. This unit will ignore all bytes

more than this value. During transmission, this unit will indicate it is ready to

receive data from computer by this DTR line. A computer has to check the DTR line before sending any information to this unit. This unit is normally always ready to receive data while operating. When a LF character (ASCII code 0AH) is received, this unit would finish the receiving by clearing the DTR status and begin to interpret the received information. The unit would execute the received command (AND/OR data) if it is correct. Irrespective of whether the command is accepted or not, the unit will always send back a response signal to the computer and set DTR to ready for receiving more incoming information.

6-2-1. The Baud-rate of the RS232 interface can be set with the help of the Setup

Menu (See details in Section 5-3-1).

Note. You have to reset the unit after adjustment to activate the new setting.

6-3. Example of RS232 Operation:

6-3-1. RS232 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. The response string is as follows:

= > CR LF: Command executed successfully

? > CR LF: Command error, not accepted

! > CR LF: Command correct but execution error (e.g. parameters out of

range).

If the command needs any information from the unit, the unit would send

the information back to the computer (with CR and LF) and then send the response string to the computer.

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SR Series Inverter

6-3-2. Command format:

This unit supports the following command format.

There should always be a CR (0DH) and a LF (0AH) appended to the

command while sending the command to this unit.

1). Command to switch the Power ON/OFF: Format: Power <value> Example: A space (ASCII code 20H) is needed between Power and

<value>. <value> can be one of the following. “0”: Power off “1”: Power on

2). Command to query the Output Frequency: Format: FRQ? After “Enter”, the unit’s “Output Frequency” appears on the PC screen.

3). Command to query the Output Voltage: Format: VOL? After “Enter”, the unit’s “Output Voltage” appears on the PC screen.

4). Command to query the Output Current: Format: AMP? After “Enter”, the unit’s “Output Current” appears on the PC screen.

5). Command to query the Input Battery Voltage: Format: BAT? After “Enter”, the unit’s “Input Voltage” appears on the PC screen.

6-3-3. Command for accessing Setup Menus and adjusting values:

1). Select the Setup Menus with the help of Function Codes: Format: FUNC <Function Code> After “Enter”, the Setup Menu for the Function Code will be called.

The <Function Code>= 0~17, as follows:

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SR Series Inverter

<Function Code> Setting Menu <Function Code> Setting Menus

0 LCD Contrast 9 UVP Recovery 1 LCD Auto-off 10 UV Alarm 2 RS232 Baud-rate 11 O/P Voltage 3 Buzzer Setting 12 O/P Frequency 4 Alert Setting 13 Sync Frequency 5 NOT USED 14 Bypass Relay 6 OVP Setting 15 Overload Alarm 7 OVP Recovery 16 NOT USED 8 UVP Setting 17 NOT USED

2). Command to query the Functions No: Format: FUNC? After “Enter”, the unit’s “Function Code” appears on the PC screen.

3). Command to query the set value of the Function: Format: SETT? After “Enter”, the existing set value of the function appears on the

PC screen.

4). Command to set or adjust the value of the Function: Format: SETT <value> After “Enter”, the new value of the Function is set Choose the

<value> of the function as follows:

FUNC 0: LCD Contrast

Setting Menu SETT <value>

LCD Contrast 0~100

FUNC 1: LCD Auto-off

Setting Menu SETT <value>

LCD Auto-off Disable~250

FUNC 2: RS232 Baud rate

Setting Menu SETT <value> Baud rate

RS-232

Baud rate

0 1200 1 2400 2 4800 3 9600

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SR Series Inverter

FUNC 3: Buzzer Setting

Setting Menu SETT <value> Buzzer (Beep sound)

Buzzer Setting

0 Disable 1 Shutdown

2 Alert 3 Alert , SHDN 4 Message 5 Message , SHDN 6 Message , Alert 7 Msg , Alert , SHDN

FUNC 4: Alert Setting

Setting Menu SETT <value> Alert

Alert Setting

0 Disable 1 Shutdown

2 Alert 3 Alert , SHDW

FUNC 6: OVP Setting

Setting Menu SETT <value> Model

OVP Setting

30~34

60 MAX.

SR1000T-124 SR1000T-224 SR1000T-148 SR1000T-248

FUNC 7: OVP Recovery

Setting Menu SETT <value> Model

OVP Recovery

28~32

SR1000T-124 SR1000T-224

56~60

SR1000T-148 SR1000T-248

FUNC 8: UVP Setting

Setting Menu SETT <value> Model

UVP Setting

18~22

36~44

SR1000T-124 SR1000T-224

SR1000T-148 SR1000T-248

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SR Series Inverter

FUNC 9: UVP Recovery

Setting Menu

SETT <value> Model

UVP Recovery

23~27

46~54

SR1000T-124 SR1000T-224

SR1000T-148 SR1000T-248

FUNC 10: UV Alarm

Setting Menu

SETT <value> Model

UV Alert

19~23

38~46

SR1000T-124 SR1000T-224 SR1000T-148 SR1000T-248

FUNC 11: O/P Voltage

Setting Menu

SETT <value> Model

O/P Voltage

97~123

SR1000T-124 SR1000T-148

194~246

SR1000T-224 SR1000T-248

FUNC 12: O/P Frequency

Setting Menu

SETT <value>

O/P Frequency

47~63

FUNC 13: Sync Frequency

Setting Menu

SETT <value>

Sync Frequency

0.1~7

FUNC 14: Bypass Relay

Setting Menu

SETT <value> Mode

Bypass Relay

0 ON LINE 1 Haphazard(OFF LINE) 2 Normal(OFF LINE) 3 Exacting(OFF LINE)

FUNC 15: Overload Alarm

Setting Menu

SETT <value>

Overload Alarm 50~110

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SR Series Inverter

7. Information

7-1. Troubleshooting

Problems and Symptoms Possible Cause Solutions

No AC Power “Output”

a. LCD Panel Display

“OLP Shutdown”

Short circuit , wiring error. over loading.

Check AC wiring for short circuit . Reduce load.

b. LCD Panel Display

“OVP Shutdown”

Over input voltage (OVP)

Check input voltage Reduce input voltage

c. LCD Panel Display

“UVP Shutdown”

Low input voltage. (UVP)

Recharge battery. Check connections and cables.

d. LCD Panel Display

“OTP shutdown”

Thermal shutdown. (OTP)

Improve ventilation. Make sure ventilation, grilles / slots of the inverter are not obstructed. Lower ambient temperature.

7-2. Warranty

We guarantee this product against defects in materials and workmanship for a period of 24 months from the date of purchase and will repair or replace any defective power inverters if you directly returned them to us with postage paid. Please note that Cotek is only responsible for ensuring our products are operational before delivering. This warranty will be considered void if the unit has been misused, altered, or accidentally damaged. Cotek is not liable for anything that occurs as a result of the user’s fault.

WARNING:

Do not open or disassemble the SR series Inverter.

Attempting to service the unit may cause risk of electrical shock or fire.

Page 32

No. 33, Sec. 2, Renhe Rd., Daxi Township, Taoyuan County 33548, Taiwan

Phone

+886-3-3891999 FAX +886-3-3802333

E-mail

[email protected] http // www.cotek.com.tw

2014.11 A1