| Electronics > Beginners |
| signal conditioning for inductrial PLC controllerS? |
| (1/1) |
| V_King:
Hello, So I bought Siemens Logo! PLC, gen6 module and now starting to play with their logic blocks. I need some practical advice from the people working with PLC modules, in regards to wiring everything up. Do I need pull up/ pull down resistors on their inputs for momentary switches or RC circuits to condition the signal, or do I assume everything is built inside with sufficient latency, to ignore signal spikes, or bouncing switches, and other noise coming from surrounding electronics? If yes, how do people installing PLC make it neat and robust? Cheers |
| Fludo:
The inputs to a PLC module are very robust, there isn't any need for signal conditioning unless it says so in the manual. Any signal processing will be handled internally with the input circuitry or through the software. |
| rstofer:
The type of connection varies depending on the model number. Most PLCs accept 120VAC for input and have relay outputs. The relays are rated around 8A in the case of this Siemens model. Some models (24, 24R) are oriented toward logic levels (albeit higher voltage than , say, TTL) Why not start with the User Manual around page 5 Section 2.2 (PDF page 12)? |
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