I have checked a few of the large manufacturers' web pages, but I have a hard time making up my mind about which model to choose. This is the reason why I'm posting this message, since I hope that you guys might be able to provide me with some valuable input.
What I need is a PLC can be wall mounted (no bare circuit board), preferably on a DIN rail. I need approximately 32 low voltage inputs, 32 output relays that can handle 240V AC and a few amps each, and four PWM-capable low voltage outputs.
What would be nice to have (not need to have) is the capability to have a distributed solution, so that all I/O does not necessarily need to be located at the same phycial location. Further, it would be nice if one could connect two PLCs of the same type, and let them share I/O.
The Siemens Logo! seems nice, and there are plenty of them available on eBay. However I got the impression that it does not have any PWM-capable outputs, and the analogue modules are quite expensive. I would appreciate alternative suggestions of which PLCs/PICs to use, preferably not too expensive.
Thanks!
What I need is a PLC can be wall mounted (no bare circuit board), preferably on a DIN rail. I need approximately 32 low voltage inputs, 32 output relays that can handle 240V AC and a few amps each, and four PWM-capable low voltage outputs.
What would be nice to have (not need to have) is the capability to have a distributed solution, so that all I/O does not necessarily need to be located at the same phycial location. Further, it would be nice if one could connect two PLCs of the same type, and let them share I/O.
The Siemens Logo! seems nice, and there are plenty of them available on eBay. However I got the impression that it does not have any PWM-capable outputs, and the analogue modules are quite expensive. I would appreciate alternative suggestions of which PLCs/PICs to use, preferably not too expensive.
Thanks!