IDCB Intelligent Data Acquisition Network (Remote I/O) Overview

IDCB intelligent data acquisition network, also known as "remote I/O", is specially designed for DCS applications. It belongs to the field bus product category and is a close partner of DCS. Hereinafter referred to as "IDCB Network".

1. Main performance indicators of "IDCB network"

★The number of main sites hanging on the network 1～2 sets

★Master station type IPC, compatible machine, portable machine, RS485/232 interface module of DCS system

★Number of slave stations linked to the network ≤255

★Communication rate 4.8Kbps～115.2Kbps programmable

★Communication distance 1200 meters (plus repeater extension)

★Communication method Half-duplex asynchronous communication

★Communication interface Standard RS-485 (full redundancy, magnetic isolation technology)

★Data format 1 start bit, 8 data bits, 1 stop bit, no parity bit

★Communication protocol MODBUS protocol (RTU mode)

★Communication check CRC-16 cyclic redundancy check

★Transmission medium Shielded twisted pair

★Network isolation voltage ≥2500Vrms

★Network protection ±15KV antistatic protection

600W anti-lightning protection

Has true failsafe

With thermal shutdown current limit protection

2. Front-end type of "IDCB network"

The naming method of the "IDCB Network" series measurement and control front-end is: IDCB—××/××, and the description is as follows:

IDCB intelligent data acquisition network (remote I/O)

The basic models of the "IDCB Network" series of measurement and control front ends are as follows:

serial number

Basic model

Remark

1. IDCB-1A

10-channel three-terminal current input (with distributor)

2. IDCB-1C

30-channel two-terminal analog input

3. IDCB-4C

16-channel three-terminal analog differential input

For common models, support thermal resistance, thermocouple, remote resistance, voltage and current input

4. IDCB-4E

20-channel three-terminal analog differential input

5.IDCB-4F

24-channel three-terminal analog differential input

6. IDCB-2A

32-channel switch input

7. IDCB-2B

16-channel switch input + 16-channel relay output

8. IDCB-2C

24-channel switch input + 8-channel relay output

9. IDCB-6A

6-channel analog output

10.IDCB-7A

12-channel three-terminal analog differential input + 8-channel switch input

11.IDCB-7B

12-channel three-terminal analog differential input + 8-channel switch output

4. Front-end main technical indicators

4.1 IDCB-4C/4E/4F analog measurement front end (common model)

★Input channel 16/20/24 three-terminal differential analog input

★Channel switch Imported photoelectric switch

★Channel isolation voltage 400V (peak-peak)

★Input signal type DC voltage, DC current, remote resistance

    Thermocouple: K, S, R, T, E, J, B, N, EA-2

    Thermal resistance: Pt100, Cu50, Cu100, G53, BA1, BA2, BA3

Various types of analog signals can be mixed in the same front end

The thermocouple has three cold junction compensation methods: automatic compensation, constant temperature compensation and other channel compensation

★A/D resolution 16 bit

★Measurement accuracy 0.1 class

★Channel sampling time 50ms

★Common mode rejection ratio ≥120dB

★Series Mode Suppression Ratio ≥70dB

★Terminal terminal Phoenix terminal (flame retardant material)

★Main function DC voltage, current signal linear or square root calculation

Thermocouple look-up table operation

Open circuit detection of thermocouple and thermal resistance

System self-check, precision self-calibration

double (hardware and software) watchdog

Power-off protection in working mode

Full redundancy of communication interface

On-site display and configuration

4.2 IDCB-1A DC current measurement front end

★Input channel 10-way three-terminal current input (with fully isolated 24V transmitter power supply)

★Channel switch Imported photoelectric switch

★Channel isolation voltage 400V (peak-peak)

★Input signal type DC current: 0～10mA, 4～20mA

★A/D resolution 16 bit

★Measurement accuracy 0.1 class

★Channel sampling time 50ms

★Common mode rejection ratio ≥120dB

★Series Mode Suppression Ratio ≥70dB

★Terminal terminal Phoenix terminal (flame retardant material)

★Main function DC current signal linear or square root calculation

Each channel can provide a separate power supply

System self-check, precision self-calibration

double (hardware and software) watchdog

Power-off protection in working mode

Full redundancy of communication interface

On-site display and configuration

4.3 IDCB-1C analog measurement front end

★Input channel 30 two-terminal analog inputs

★Channel switch Imported photoelectric switch

★Channel isolation voltage 400V (peak-peak)

★Input signal type DC voltage, DC current

    Thermocouple: K, S, R, T, E, J, B, N, EA-2

Various types of analog signals can be mixed in the same front end

Thermocouple has two cold junction compensation methods: automatic compensation and constant temperature compensation

★A/D resolution 16 bit

★Measurement accuracy 0.1 class

★Channel sampling time 50ms

★Common mode rejection ratio ≥120dB

★Series Mode Suppression Ratio ≥70dB

★Terminal terminal Phoenix terminal (flame retardant material)

★Main function DC voltage, current signal linear or square root calculation

Thermocouple look-up table operation

Open circuit detection of thermocouple and thermal resistance

System self-check, precision self-calibration

double (hardware and software) watchdog

Power-off protection in working mode

Full redundancy of communication interface

On-site display and configuration

4.4 IDCB-2A switch input front end

★Input channel 32 isolated inputs (isolation voltage 1500V)

★Input mode Passive dry node input

★Terminal terminal Phoenix terminal (flame retardant material)

4.5 IDCB-2B switch input and output front end

★Input channel 16 isolated inputs (isolation voltage 1500V)

★Output channel 16-way relay dry node output

★Input mode Passive dry node input

★Output method Relay contact capacity 30VDC/1A

★Terminal terminal Phoenix terminal (flame retardant material)

4.5 IDCB-2C switch input and output front end

★Input channel 24 isolated inputs (isolation voltage 1500V)

★Output channel 8-way relay dry node output

★Input mode Passive dry node input

★Output method Relay contact capacity 30VDC/1A

★Terminal terminal Phoenix terminal (flame retardant material)

4.6 Working Environment of IDCB Series Front End

★Power consumption ≤5W

★Reliability index MTBF32000Hr

★Operating ambient temperature -20℃～75℃

★Ambient humidity Relative humidity ≤95% (with protective case)

★Protection level IP56 (with protective shell)

★Power supply 165～265V AC/49～51Hz

★Weight ≤5kg

★Dimensions 460×320×80 (length×width×height; unit: mm)

4.7 IDCB-6A analog output front end

★Output channel 6 channels

★Output signal 0～20mA or 0～5V

★Accuracy class 0.15

★Allowable load ≤500Ω

★Terminal terminal Phoenix terminal (flame retardant material)

4.8 IDCB-7A analog input switch input front end

★Input channel 12 analog inputs (technical parameters are the same as 4C/4E type)

    8-way switch input (technical parameters are the same as 2B type input channel)

★Terminal terminal Phoenix terminal (flame retardant material)

4.9 IDCB-7B analog input switch output front end

★Input channel 12 analog inputs (technical parameters are the same as 4C/4E type)

★Output channel 8-way relay dry node output (technical parameters are the same as 2B output channel)

★Terminal terminal Phoenix terminal (flame retardant material)

4.10 IDCB-8A transmitter distributor

★Main function Mainly used to provide 24V power supply for transmitter

★Output channel 20 fully isolated 24V/30mA DC power supply

★Output signal accuracy 24V±5%

★Channel isolation voltage ≥1500V AC

★Terminal terminal Phoenix terminal (flame retardant material)

1. Features of "IDCB Network":

★The most notable feature of "IDCB network" lies in the standardization of the communication interface and the openness of the communication protocol, which can be adapted to various configuration software, and can easily realize the communication with any network and system (especially DCS) that supports the MODBUS-RTU protocol. Communication interconnection.

The difference of "IDCB network" is that the communication interface adopts the technology of "full redundancy". The two redundant buses have complete and independent bus controller, bus driver and bus medium layer. The two buses can be simultaneously run without affecting each other.

The biggest advantage of "IDCB network" is that the remote I/O front end can be directly installed near the signal measuring point of the industrial site, so as to achieve real physical dispersion, save a lot of signal cables and compensation wires, simplify engineering design and reduce construction costs , shorten the construction period.

★The latest technology of "IDCB network" is that the communication interface adopts the latest magnetic isolation technology, which greatly eliminates a series of problems such as the uncertain current transfer ratio, nonlinear transfer characteristics, drift with time and temperature drift in the optocoupler. It has the incomparable advantages of optocouplers.

★The front end of "IDCB Network" series remote I/O adopts a sealed structure, the protection level reaches IP56, and has high dustproof, waterproof, magnetic field and shock resistance.

★ "IDCB network" series remote I/O front end adopts modular structure design, which can make the system size quite flexible and easy to expand.

★The "IDCB Network" series remote I/O front-end has complete electrical isolation and self-checking circuit, dual (hardware and software) watchdogs, strong anti-interference ability, and can operate reliably for a long time in harsh field environments.

★The "IDCB Network" series remote I/O front-end adopts SOC-System on Chip design and adopts surface mount (SMT) process welding, which makes the whole machine small in size, low in power consumption and high in integration.

★The front end of "IDCB network" series remote I/O is adapted to high-brightness liquid crystal display, and the display is clear and bright.

★The "IDCB Network" series remote I/O front-end terminal adopts Phoenix detachable terminal, which is convenient to replace the front-end bare metal; the signal wiring does not need to be short-circuited, and the wiring is convenient, simple and reliable.

Practice has proved that the "IDCB Network" series of analog measurement front-end products are especially suitable for the conventional temperature group measurement points of large generator sets (boiler metal wall temperature, generator coil iron core temperature, cylinder wall temperature, auxiliary machine coil temperature group, etc.) It can also be widely used in data monitoring systems in metallurgy, petrochemical, environmental protection, light industry and other industries.

I/O description

IDCB intelligent data acquisition network series products are based on the accumulation of years of industrial instrument manufacturing experience and technology, fully considering the needs of industrial field data acquisition, using the latest microelectronic technology and new surface mount technology to independently develop and produce high-performance remote intelligent I/O It can complete the continuous high-precision measurement of various signals scattered in the industrial field. This series of front ends has a series of advantages such as high measurement accuracy, strong anti-interference ability, good interface openness, high energy level, simple and flexible use, convenient installation and expansion, and high performance-price ratio.