4-20mA Ma to 232 current acquisition module RTU MODBUS protocol photoelectric isolation communication

Baby model:420MA-IN8-KT232

Optical isolation RS-232 interface standard MODBUS RTU protocol from the device can be used as PLC, MCGS, Kingview extended terminal access, 8-channel industrial 0 ~ 20mA current input interface, current acquisition accuracy of 0.001mA, the module embedded within the average Filter algorithm, so that the collected current value is very stable, the module is stable.

aboutPhotoelectric isolation232 communication instructions

In most applications, the 232 communication does not do the photoelectric isolation is not too big problem, butIn the industrial field,In particular, the acquisition of high precision analog (current, voltage)In the case, the interference on the main board of the computer 232 communication lines on the motherboard will cause a greater impact on the work, will lead to a large collection of data is relatively large,In order to meet the requirements of the industrial field on the stability and communication stability of the module,This module regardless of cost, high speed optocoupler and isolated DCDC power module, the photoelectric isolation of 232 communication lines, completely solve the interference on the motherboard power communication line 232,Some modules on the market communication interface is not to do the photoelectric isolation, if you use this product to collect the data is not stable, you first consider whether the communication interface does not do the reasons for optoelectronic isolation!Simply say: photoelectric isolation, is better than not isolated!

Before buying, please pay attention to:If you want to get a stable collection of data, the 232 communication interface must be photoelectric isolation, you buy the product does not buy my store is not important, but kindly remind you that this indicator is very important!

Connection description

12V- the main board is working,Range: DC12V ~ DC24V,Recommend DC12V

GND- power supply to the main board

I0~I7--- 4~20mA input current source channel 0~7(in a public place with GND)

RS-232- - - - - - - - - - - - - - - - - - - - - - - - - - - - - 232 communication interface, the

The following is a kind of module RS-232 communication interface, the interface with the computer COM port directly to the communication can be.