Shulou(Shulou.com)06/03 Report--

Analog signal 4-20mA to RS-485/232, data acquisition A-amp D conversion module

Product features:

● analog signal acquisition, isolation conversion RS-485/232 output

● adopts 12-bit AD converter, and the measurement accuracy is better than 0.1%.

● can program-control the accuracy of the calibration module through the RS-485/232 interface.

Isolated voltage withstand 3000VDC between input / output of ● signal

● wide power supply range: 8 ~ 32VDC

● has high reliability, convenient programming and easy application.

● standard DIN35 guideway installation, convenient centralized wiring

● user programmable setting module address, baud rate, etc.

● supports Modbus RTU communication protocol

Low cost and small volume modular design of ●

Typical applications:

● signal measurement, monitoring and control

● RS-485 remote iMago, data acquisition

● intelligent building control, security engineering and other application systems

● RS-232/485 bus Industrial Automation Control system

Signal isolation and long-distance Transmission in ● Industrial Field

Operation monitoring of ● equipment

Measurement of ● Sensor signal

Acquisition and recording of ● Industrial Field data

Development of ● medical and industrial control products

● 4-20mA or 0-5V signal acquisition

Product Overview:

The product realizes the signal acquisition between the sensor and the host, which is used to detect the analog signal. IRT series products can be used in RS-232/485 bus industrial automation control system, 4-20mA / 0-5V signal measurement, monitoring and control, 0-75mV 0-100mV and other small signal measurement, industrial field signal isolation and long-line transmission and so on.

Products include power isolation, signal isolation, linearization, Amax D conversion and RS-485 serial communication. Each serial port can connect up to 255modules, and the communication mode adopts ASCII code communication protocol or MODBUS RTU communication protocol. Its instruction set is compatible with the ADAM module, and the baud rate can be set by the code. It can be hung on the same RS-485 bus with the control modules of other manufacturers, which is convenient for computer programming.

IRT series products are intelligent monitoring and control system based on single-chip microcomputer. All the configuration information such as calibration value, address, baud rate, data format, checksum status and so on set by the user are stored in the non-volatile memory EEPROM.

The products are designed and manufactured according to industrial standards, isolated between signal input / output, can withstand 3000VDC isolation voltage, strong anti-interference ability and high reliability. The operating temperature range is-45 ℃ ~ + 85 ℃.

Function introduction:

Signal isolation acquisition module, which can be used to measure a voltage or current signal

1. Analog signal input

12-bit acquisition accuracy, all signal input ranges have been calibrated before the product leaves the factory. When in use, users can also easily program and calibrate themselves.

For the specific current or voltage input range, please refer to the product selection.

2. Communication protocol

Communication interface: 1-way standard RS-485 communication interface or 1-way standard RS-232 communication interface, marked when ordering and selection.

Communication protocol: supports two protocols, the character protocol defined by the command set and the MODBUS RTU communication protocol. Can be programmed to use that communication protocol, can achieve network communication with a variety of brands of PLC, RTU or computer monitoring systems.

Data format: 10 bits. 1 start bit, 8 data bit, 1 stop bit.

The communication address (0,255) and baud rate (2400, 4800, 9600, 19200, 38400bps) can be set; the communication network can reach a maximum distance of 1200 meters and is connected by a twisted pair shielded cable.

Communication interface high anti-interference design, ±15KV ESD protection, communication response time is less than 100mS.

3. Anti-interference

The checksum can be set as needed. There are transient suppression diodes in the module, which can effectively suppress all kinds of surge pulses, protect the module, internal digital filtering, and also suppress the power frequency interference from the power grid.

Product selection:

IRT-U (A) □-□

Input voltage or current signal value communication interface

U1VR 0-5V A1VR 0-1mA 485: output to RS-485 interface

U2VR 0-10V A2RU 0-10mA 232: output to RS-232 interface

U3VL 0-75mV A3RO-20mA

U4VR 0-2.5V A4RU 4-20mA

U5 0-±5V A5 0-±1 mA

U6 0-±10V A6VR 0-±10 mA

U7 0-±100 mV A7 0-±20 mA

U8: user customization A8: user customization

Selection example 1: model: IRT A4-485represents 4-20mA signal input, output is RS-485 interface

Selection example 2: model: IRT U1-232indicates 0-5V signal input and output is RS-232 interface

General parameters:

(typical @ + 25 ℃, Vs is 24VDC)

Input type: current input / voltage input

Precision: 0.1%

Temperature drift: ±30 ppm/ ℃ (±50 ppm/ ℃, maximum)

Input resistance: 50 Ω (4-20mAamp 0-20mAamp 0-±20 mA current input)

100 Ω (0-10mAamp 0-±10 mA current input)

1K Ω (0-1mA mA 0-±1 Ma current input)

Greater than 1m Ω (voltage input)

Bandwidth:-3 dB 10 Hz

Conversion rate: 10 Sps

Common mode suppression (CMR): 120 dB (1k Ω Source Imbalance @ 50 lap 60 Hz)

Norm suppression (NMR): 60 dB (1k Ω Source Imbalance @ 50 lap 60 Hz)

Input protection: overvoltage protection, overcurrent protection

Communication: protocol RS-485 or RS-232 standard character protocol and MODBUS RTU communication protocol

Baud rate (2400, 4800, 9600, 19200, 38400bps) can be selected by software

Address (0,255) can be selected by software.

Communication response time: 100 ms maximum

Working power supply: + 8 ~ 32VDC wide power supply range, internal anti-reverse connection and overvoltage protection circuit

Power consumption: less than 1W

Operating temperature:-45 ~ + 80 ℃

Working humidity: 10 ~ 90% (no condensation)

Storage temperature:-45 ~ + 80 ℃

Storage humidity: 10 ~ 95% (no condensation)

Isolated voltage withstand: between input / output: 3KVDC for 1 minute, leakage current 1mA

In which the output and the power supply are common.

Withstand impulse voltage: 3KVAC, 1.2/50us (peak)

Form factor: 106.7 mm x 79 mm x 25mm

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