I-Tech IT8500plus Series Manual de usuario

IT8500+ Series Frame Format

Programmable DC Electronic Load

Models IT8500+

Ver1.1/MAR, 2008/8500-401

Directory

Warranty Information............................................................................................................................... 3

Safety Summary....................................................................................................................................... 3

Chapter 1 Remote Operation Mode........................................................................................................ 5

1.1 Communication Modules Introduction ............................................................................5

1.2 Communication with PC.................................................................................................7

Chapter 2 Communication Order for IT8500+ ....................................................................................... 9

Frame Format......................................................................................................................9

Communication Protocol....................................................................................................13

Warranty Information

Certification

We certify that this product met its published specifications at time of shipment from the factory.

Warranty

This hardware product is warranted against defects in material and workmanship for a period of

ONE year from date of delivery. IT8500 series electronic load for use with a hardware product and

when properly installed on that hardware product, are warranted not to fail to execute their

programming instructions due to defects in material and workmanship for a period of 90 days from

date of delivery. During the warranty period our company will either repair or replace products which

prove to be defective. Our company does not warranty that the operation for the software firmware

or hardware shall be uninterrupted or error free.

For warranty service, with the exception of warranty options, this product must be returned to a

service facility designated by our company. Customer shall prepay shipping charges by (and shall

pay all duty and taxes) for products returned to our place for warranty service. Our company shall

pay for return of products to Customer.

Limitation of Warranty

The foregoing warranty shall not apply to defects resulting from improper or inadequate

maintenance by the Customer, Customer-supplied software or interfacing, unauthorized

modification or misuse, operation outside of the environmental specifications for the product, or

improper site preparation and maintenance.

Assistance

The above statements apply only to the standard product warranty. Warranty options product

maintenance agreements and customer assistance agreements are also available.

Safety Summary

The following general safety precautions must be observed during all phases of operation of this

instrument. Failure to comply with these precautions or with specific warnings elsewhere in this

manual violates safety standards of design, manufacture, and intended use of the instrument .We

assumes no liability for the customer’s failure to comply with these requirements.

Environmental Conditions

This instrument is intended for indoor use. Pollution degree 2 environments. It is designed to

operate at a maximum relative humidity of 95% and at altitudes of up to 2000 meters. Refer to the

specifications tables for the ac mains voltage requirements and ambient operating temperature

range.

Before Applying Power

Verify that all safety precautions are taken. Note the instrument's external markings described under

"Safety Symbols".

Ground the Instrument

This product is a Safety Class 1 instrument (provided with a protective earth terminal). To minimize

shock hazard, the instrument chassis and cover must be connected to an electrical ground. The

instrument must be connected to the ac power mains through a grounded power cable, with the

ground wire firmly connected to an electrical ground (safety ground) at the power outlet. Note: Any

interruption of the protective (grounding) conductor or disconnection of the protective earth terminal

will cause a potential shock hazard that could result in personal injury.

DO NOT OPERATE IN AN EXPLOSIVE ATMOSPHERE

Do not operate the instrument in the presence of fumes or flammable gases.

KEEP AWAY FROM LIVE CIRCUITS

Operating personnel must not remove instrument covers except as instructed in this Guide for

installing or removing electronic load modules. Component replacement and internal adjustments

must be made only by qualified service personnel. Do not replace components with power cable

connected. Under certain conditions dangerous voltages may exist even with the power cable

removed. To avoid injuries always disconnect power, discharge circuits, and remove external

voltage sources before touching components.

DO NOT SERVICE OR ADJUST ALONE

Do not try to do some internal service or adjustment unless another person capable of rendering

first aid resuscitation is present.

Safety Symbols

Direct current

Alternating current

Both direct and alternating current

Protective earth (ground) terminal

Caution (refer to accompanying documents)

The WARNING sign denotes a hazard. It calls attention to a procedure, practice, or the like, which, if

not correctly performed or adhered to, could result in personal injury. Do not proceed beyond a

WARNING sign until the indicated conditions are fully understood and met.

The CAUTION sign denotes a hazard. It calls attention to an operating procedure, or the like, which,

if not correctly performed or adhered to, could result in damage to or destruction of part or all of the

WARNING

CAUTION

Chapter 1 Remote Operation Mode

DB9 in the rear panel of electronic load could connect with RS-232 through a TTL connector. The

following information may help you to know how to control the electronic load through PC.

1.1 Communication Modules Introduction

DB9 in the rear panel of the DC load IT8511+/IT8511A+/IT8511B+/IT8512+

/IT8512A+/IT8512B+/IT8512C+/IT8512H+/IT8513A+/IT8513C+ is TTL level,

which can be connected to the serial port of the PC through the level

conversion of the accessory. The communication module is

IT-E121/IT-E121A/IT-E122/IT-E123.

IT8513B+/IT8514B+/IT8514C+/IT8516C+ comes standard with RS232 and

USB communication interfaces, no need to purchase

IT-E121/IT-E121A/IT-E122/IT-E123.

Please do not connect the standard RS232 cable to the

IT8511+/IT8511A+/IT8511B+/IT8512+/IT8512A+/IT8512B+/IT851

2C+/IT8512H+/IT8513A+/IT8513C+ electronic load, which may

damage the instrument.

IT-E121 Communication Module

The DB9 interface connector on the rear panel of the DC load is TTL voltage

level; You can use IT-E121 communication module and IT-E121's own RS232

extension cable to connect the DB9 interface connector of the DC load and

the RS-232 interface connector of the computer for communication.

IT-E121A Communication Module

The DB9 interface connector on the rear panel of the DC load is TTL voltage

level; IT-E121A is derived from IT-E121 (not including communication cable).

The main difference is that the DB9 female connector on the RS232 end is

converted to a male connector.

IT-E121A communication cable

IT-E122 Communication Module

The DB9 interface connector on the rear panel of the DC load is TTL voltage

level; IT-E122 has a USB interface (male connector B) on one end, you can

use IT-E122 and a standard USB extension cable (type B female connector at

one end and typeA at one end) to connect the DB9 interface connector of the

DC load and the USB interface connector of computer for the communication.

After connecting the load and computer by USB, you need to install IT-E122

driver (download from ITECH official website or contact ITECH agent). The

device manager of PC will display ‘Prolific USB-to-Serial COM Port’ after

installing.

IT-E123 Communication Module

The DB9 interface connector on the rear panel of the DC load is TTL voltage

level;

The interface on both side port of IT-E123 are DB9 interface and RS485

interface, you can use the communication module IT-E123 and an a standard

RS485-RS232 conversion cable to connect the DB9 interface connector of

the DC load and the RS-232 interface connector of computer for the

communication.

RS485 pins

1.2 Communication with PC

Before using the remote operation mode, please make sure that the baud rate

and communication address in the DC load are the same as in the computer

software, otherwise, the communication will fail, you can change the baud

rate and communication address from the front panel or from computer.

DB9 Serial Port

In order for the computer to communicate with the DC load, both must be set

to the same RS-232 settings. These communication settings are:

1. Baud rate: 4800,9600,19200 and 38400 are selectable, default setting is

9600.

2. Data bit: 8 bit

3. Stop bit: 1

4. Parity: None

5. Address: the range is from 0 to 31, default setting is 0

Start Bit

8 Data Bits

Parity=None

Stop Bit

RS-232 IT8513B+/IT8514B+/IT8514C+/IT8516C+ electronic load has a DB9 interface

on rear panel. Connect E-load and computer by cable of COM ends (DB9).

Composite key [Shift] + [8] on front board can be used to enter system menu

for activation.

⚫RS-232 Interface

In RS-232 interface, all SCPI commands can be used for programming. If

RS-232 interface is selected, in accordance with internal connection of data

terminal equipment (DTE) and data communication equipment (DCE) as

defined in EIA RS-232, the load is connected to another DTE (e.g., PC COM

interface) with direct-connected Modem cable.

RS232 Pins of Plug

Base Pin

Number

Description

No conjunction

TXD, data transmission

RXD, data receiving

No conjunction

GND, grounding

No conjunction

CTS, clear to send

RTS, request to send

No conjunction

⚫Communication Setup

Please ensure the PC and the load have the same configuration in the

following items.

Baudrate: 9600(4800, 9600, 19200, 38400). You could enter the system

menu to set the baudrate.

Data bit: 8

Stop bit: 1

Parity bit: (none, even, odd)

EVEN 8 data bits have even parity

ODD 8 data bits have odd parity

NONE 8 data bits have no parity

Native machine address: (0 ~31, factory default is 0)

Start Bit

8 Data Bits

Parity=None

Stop Bit

USB Interface Connect the load and the computer using a cable with two USB interfaces

(each end). All functions of the load can be programmed via USB.

After connecting the load and computer by USB, you need to install IT-E122

driver (download from ITECH official website or contact ITECH agent). The

device manager of PC will display ‘Prolific USB-to-Serial COM Port’ after

installing.

Notes: Only IT8513B+/IT8514B+/IT8514C+/IT8516C+ models have the USB

communication interface. After the driver is installed successfully, use USB

line to connect in communication. (Please don’t connect DB9 interface at the

same time). Don’t need to set the menu.

Chapter 2 Communication Order for IT8500+

Frame Format

Frame length is 26 bytes. Details as following:

AAH

Address

Command

4—25bytes are information content

Parity code

Description ：

1．Start bit is AAH，occupies one byte.

2．Address range from 0 to 31, occupies one byte. 0XFF is boardcast address.

3．Each command occupies one byte. Following is the command details.

20H

Set the Remote control mode

21H

Set the input on/off state

22H

Set the max input voltage

23H

Enquire the max setup input voltage.

24H

Set max input current

25H

Enquire the max setup input current.

26H

Set max input power.

27H

Enquire the max setup input power.

28H

Set CC/CV/CW/CR operation mode of electronic load.

29H

Enquire the operation mode.

2AH

Set CC mode current value

2BH

Enquire CC mode current value

2CH

Set CV mode voltage value

2DH

Enquire CV mode voltage value

2EH

Set CW mode watt value

2FH

Enquire CW mode watt value

30H

Set CR mode resistance value

31H

Enquire CR mode resistance value

32H

Set CC mode transient current and timer parameter.

33H

Enquire CC mode transient parameter

34H

Set CV mode transient voltage and timer parameter.

35H

Enquire CV mode transient parameter

36H

Set CW mode transient watt and timer parameter

37H

Enquire CW mode transient parameter

38H

Set CR mode transient resistance and timer parameter

39H

Enquire CR mode transient parameter

3AH

Set the list operation mode (CC )

3BH

Enquire the list operation mode.

3CH

Set the list repeat mode (ONCE / REPEAT)

3DH

Enquire the list repeat mode.

3EH

Set list steps counts.

3FH

Enquire list steps counts

40H

Set one of the step’s current and time values.

41H

Enquire one of the step’s current and time values.

4CH

Save list file in appointed area.

4DH

Recall the list file from the appointed area.

50H

Set timer value of FOR LOAD ON

51H

Enquire timer value of FOR LOAD ON

52H

Disable/Enable timer of FOR LOAD ON

53H

Enquire timer state of FOR LOAD ON

54H

Set communication address

55H

Enable/Disable LOCAL control button.

56H

Enable/Disable remote sense mode.

57H

Enquire the state of remote sense mode.

58H

Set trigger source.

59H

Enquire trigger source.

5AH

Sending a trigger signal to trigging the electronic load.

5BH

Saving user’s setting value in appointed memory area for recall.

5CH

Recall user’s setting value in appointed memory area.

5DH

Set function mode(FIXED/SHORT/TRAN/LIST/BATTERY).

5EH

Enquire function mode state.

5FH

enquire input voltage, current, power and relative state

01H

Get the information of E-Load(rated current/voltage,min voltage,max power,max

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