Principle and application of low cost / small volume module rs485/232 to analog signal ibf33

Product overview ：

IBF33 Series of products realize host RS-485/232 The interface signal is isolated and converted into standard analog signal , Used to control remote devices .IBF33 Series products can be used in RS-232/RS-485 Bus industrial automation control system ,4-20mA,0-5V,0-10V Wait for standard signal output , Executive equipment used to control industrial sites , Control equipment and display instruments, etc .

Products include power isolation , Signal isolation 、 Linearization ,D/A Conversion and RS-485 serial communication . Each serial port can be connected to at most 255 only IBF33 Series modules , Communication mode adopted ASCII Communication protocols and codes MODBUS RTU Communication protocol , Automatically identify the communication protocol and reply , Baud rate can be set by code , It can be hung in the same place with the control module of other manufacturers RS-485 On the bus , Easy to program .

IBF33 The series of products are based on the intelligent monitoring and control system of single chip microcomputer , All user set calibration values , Address , Baud rate , data format , Configuration information such as checksums and status is stored in nonvolatile memory EEPROM in .

IBF33 The series products are designed according to industrial standards 、 manufacture , Signal output / Isolation between communication interfaces , affordable 3000VDC Isolation voltage , Strong anti-interference ability , High reliability . Operating temperature range - 45℃～+80℃.

IBF33 Function introduction ：

IBF33 Signal isolation D/A Conversion module , It can be used to output 8 Current or voltage signal of common ground .

1. Analog signal output

12 Bit output accuracy , All signal output ranges have been calibrated before the product leaves the factory . When use , Users can also easily program and calibrate themselves .

Please refer to product selection for specific current or voltage output range ,8 The output selection must be the same .

1. Communications agreement

communication interface ： 1 Road standard RS-485 A communication interface or 1 Road standard RS-232 communication interface , When ordering, please indicate .

Communication protocol ： Two protocols are supported , Command set defined character protocol and MODBUS  RTU Communication protocol . The module automatically recognizes the communication protocol , Can be realized with a variety of brands PLC、RTU Or computer monitoring system for network communication .

data format ：10 position .1 Bit start bit ,8 Digit bit ,1 Bit stop bit .

postal address （0～255） And baud rate （2400、4800、9600、19200、38400、57600、115200bps） Can be set ; The communication network can be as long as 1200 rice , Connect by twisted pair shielded cable .

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

1. anti-interference

Check sum can be set as required . There is a transient suppression diode inside the module , It can effectively suppress all kinds of surge pulse , Protection module , Internal digital filtering , It can also suppress the power frequency interference from the power grid .

 

Product features ：

● Low cost 、 Small volume modular design

●  RS-485/232 Interface , Isolation conversion to 8 Standard analog signal output

● The output accuracy of analog signal is better than 0.2%

● The output accuracy of the calibration module can be programmed

● Signal output / Isolation between communication interfaces 3000VDC

● Wide power supply range ：8 ~ 32VDC

● High reliability , Easy to program , Easy installation and wiring

● User programmable module address 、 Baud rate, etc

● It can be set as a host to read IBF33 Product data can be collected remotely              

● Support Modbus RTU Communication protocol , Automatic identification protocol

Typical applications ：                                                 

●  0-10V Standard analog signal output

● Intelligent building control 、 Security engineering and other application systems                                

●  RS-232/485 Bus industrial automation control system                  

● Light control ,LED Intelligent dimming control

● Equipment operation commissioning and control

● Remote transmission and signal restoration of sensor signal

● Industrial field actuator data setting                                    

● Medical care 、 Industrial control product development

●  4-20mA Signal output

 

IBF33 General parameters ：

(typical @ +25℃,Vs by 24VDC)

The output type ：  Current output / The output voltage

fine     degree ：  0.2%

Output offset ：  Current output ±0.5 uA/℃  , The output voltage ±0.1 mV/℃

Temperature drift ：  ±20 ppm/℃ (±30 ppm/℃, Maximum )

Output carrying capacity ： Current output     350Ω (4-20mA/0-20mA/0-±20mA Current output )             

              The output voltage     10mA(0-5V/0-10V/0-±5V The output voltage )

through     News ：   agreement   RS-485 or RS-232   Standard character protocol and MODBUS RTU Communication protocol

             Baud rate （2400、4800、9600、19200、38400、57600、115200bps） Software options

Address （0～255） Software options

Communication response time ：100 ms Maximum

Working power supply ：    +8 ~ 32VDC Wide power supply range , There are anti reverse connection and over-voltage protection circuit inside  

Power consumption ：    Less than 1.5W

working temperature ：    - 45 ~ +80℃         

Working humidity ：   10 ~ 90% ( No condensation )

Storage temperature ：   - 45 ~ +80℃              

Storage humidity ：   10 ~ 95% ( No condensation )                                     

Isolation and withstand voltage ：   communication interface / Output   Between ：  3KVDC,1 minute , Leakage current 1mA

             The communication interface and power supply are grounded together .8 Way analog quantity common ground output .

Impulse withstand voltage ： 3KVAC, 1.2/50us( Peak value )

Dimensions ：   106.7 mm  x  79 mm  x  25mm