Sign in to follow this  
Followers 0
1fn

PLC or remote IO suggesstion

4 posts in this topic

Hi can anybody suggest hardware required i.e. PLC / remote IO that will required for a system with around 120 thermocouples and few digital inputs and outputs.

Share this post


Link to post
Share on other sites
Hi, Choosing remote I/O depends on your field bus communication protocol. It means you should first choose your protocol like Profibus, Modbus, Industrial Etehernet, etc. for choosing PLC, the number of I/O (analog or digital) is important, but you should consider the volume of programming and also response time of the controller as well. If you have more analog signal to be processed, then you should program more control loops in your user program. It means more powerful PlC is required( more RAM, higher speed CPU) There are many brands which you can select your hardware. You also consider the price of modules For remote I/O selection, please take a look at below links, it will give you a perspective: http://www.icpdas-usa.com/remoteiomodules.html For PLC: http://www.icpdas-usa.com/embedded_controllers_plc_controllers.html Good Luck!

Share this post


Link to post
Share on other sites
________________________________________________________________________________________________________________________ thanks for response Well here are some details about the application, actually i need some advice regarding hardware that has been reliable and easier to maintain overtime. temperature readings from 120 thermocouples and switching the units on/off accordingly. response time is not an issue as it can be upto a few seconds because the temperature change is slow my trial attempt with adam modules has not been very good, so spending more on trials is not a good way forward thx

Share this post


Link to post
Share on other sites
Which protocol do you want for communicating with the remote I/O? Modbus (RTU or TCP), Profibus DP and Industrial Ethernet are the most famous protocols to communicate between control system and remote I/Os these days. For Thermocouple remot I/O, you need to consider the Thermocouple Ranges (Type J, K, T, E, R, S, B, N, C, L, M, L2 etc). in addition, You may also need to check the Sample rate and isolation of each channel ( Field to Logic). Below are some good Thermocouple modules: http://www.icpdas-usa.com/i_7018z.html?r=mohsen http://www.icpdas-usa.com/i_7018bl.html?r=mohsen http://www.icpdas-usa.com/i_7011p_i_7011pd.html?r=mohsen http://www.icpdas-usa.com/i_7018_i_7018p.html?r=mohsen http://www.icpdas-usa.com/i_7011_i_7011d.html?r=mohsen http://www.icpdas-usa.com/m_7019r.html?r=mohsen http://www.icpdas-usa.com/i_7019r.html?r=mohsen Good Luck!

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now
Sign in to follow this  
Followers 0