Hi to all.
I got one system that we want to upgrade. Basically, i want to reduce / remove all this contactor wiring with SSR and diodes. This geared motors ( 5 of them ) have no other function then moving in one or other direction, defined by push button press....
Strongest motor is 1,2KW and the rest are in 500 - 1K range...
Ideas ?
A.
For lack of information, no.
Re-read your own post. Would you be able to recreate the project you're describing based on just that info? I certainly can't. Now if you add the missing information, and clearly describe what you want to change and why, maybe we can get somewhere.
I agree with you... I was writing fast and mostly in "before i forget" manner :-).
You can look at this system as some kind of wooden stove for heating water.
You got one main geared motor that is used as filler unit for chopped wooden material ( 1,2KW, CV /CCW ) Two motors for turning flaps and rest are ventilators and pump motors.
Filler and flap motors are running as needed ( based on readings from temperature sensors ) and at the moment, vent and pump motors are active whole time. This sensing part is mostly done so now i got to solve this motor control.
Each of this motor is geared motor so basically i dont need to do anything accept turn it on/off or switch direction. E.g. when filler is filling new dose, worm geared motor is moving forward and backward to push new material in. If there is some leftovers in worm gear , process is repeated.. All this is based on sensing part and this should not be a problem. e.g. repeat filling or "clean" worm gear..
There are few sensors that will be used for pressure / smoke / temperature reading and based on that, motors can have some predefined values that are automatically triggered depending on situation.
At the moment this is done over PLC and contactors but like i wrote, plan is to make some PCB which will have smaller dimension and same use/quality. I should be able to set some filler time, maximum heat etc...
A.
so, you have a perfectly working system, made with UL approved or IEC approved parts, an industrial PLC....
and you want to replace with hobby parts of questionable abilities ?
You do know that the SSR's you get are about 4x over rated. the guts are usually in the 5-10 amp range, but the label says 30 or 40 amps.
if you want to duplicate the working of the PLC and keep the motor starters, I assume combination heater/starter ?
it might be best to start by creating an interface that uses the existing motors and starters and just replace the PLC.
a layered approach.
when doing industrial or process controls, one always has to run out the path of worst case.
what if one sensor failed and a thing did not work properly ? is it possible for the heater to overheat and break ?
exhaust vent not work and fill the space ?
I would highly recomend you create a flow chart of the existing system
and really take your time in describing what you plan to do, your rushed posts and lack of details makes the project questionable.
you my be 1,000% correct, but the lack of details is cause for concern.
so, you have a perfectly working system, made with UL approved or IEC approved parts, an industrial PLC....
and you want to replace with hobby parts of questionable abilities ?
*** It looks like this but it's not 
The college has made this system fully alone so he is familiar with work and problems of this heating system. At the time, we had some PLC in garage so we use them to test work. It's has been so since then (last 3 years ), but now its time to modernize this and to make this smaller, easy to maintain and use. I will definitely not use some half backed HW for this project.
In general you have two AC three phase motors and 3 AC single phase motors ( one of them is vent ).
At the moment my biggest concern are those 2 single phase motors because i need to switch the rotation.
But, maybe this will not be such a problem because those 2 AC motors have some controller so i can control it with relay ?. The motors in question are belimo SM230A..
A.
The PDF you gave for that motor clearly states the direction of rotation is set by a switch on the motor housing. Please give a link to the controller you mention. How does it move the switch?
Paul
"The motors in question are belimo SM230A.."
This is a single-phase motor. Where is the three-phase motor in your original question?
"The college has made this system fully alone so he is familiar with work and problems of this heating system. "
Is that college or colleague? Either way a system schematic should be available.
Is that college or colleague?
** good point :-). It's typo, colleague.
He has worked on this for some years now.
Please look at the posts above. Main motors are three phase and others are single.
@Paul_KD7HB
Please scroll down to the end of pdf. There is wiring schematics.
IMHO i think that there must be a way to connect directly to motor wires because this switch is not used in current setting either. At the moment all is connected over contactors.
A.
Hi,
SM230A is a rotary position actuator, with position feedback, are you going to be using the feedback to control the actuator position?
Can you tell us your electronics, programming, arduino, hardware experience?
Do you have an existing circuit diagram of the system as it is now with the PLC.
I strongly support @dave-in-nj, this project needs industrial control equipment, hardened to take the EMC and starting currents associated with electric motors.
There are plenty of industrial PLCs out there that will fit your needs.
Tom....