| ??? 02/17/06 23:07 Read: times |
#110261 - Pulse input Responding to: ???'s previous message |
As such, you can't connect your 24V signal DIRECT to the port pin - you'll need to have a resistor divider and maybe a zener diode for protection. PLCs usually have a optocoupler but depending on your specific application, the optocoupler may offer you benefits. If its for industrial control and the wiring might run for a large distance, then use an optocoupler. |
| Topic | Author | Date |
| +24 volt DC pulse counting with 8 signal | 01/01/70 00:00 | |
| you shouldn't daisy-chain RS485 | 01/01/70 00:00 | |
| WHY | 01/01/70 00:00 | |
| sorry, me stupid | 01/01/70 00:00 | |
| if you get the details right it certainl | 01/01/70 00:00 | |
| Daisy Chain | 01/01/70 00:00 | |
| The only REAL way to connect RS485 is de | 01/01/70 00:00 | |
| What you need is a PLC | 01/01/70 00:00 | |
| Erik and Jan is it feasible. | 01/01/70 00:00 | |
| already answered: | 01/01/70 00:00 | |
| for pulses counting | 01/01/70 00:00 | |
| Pulse input | 01/01/70 00:00 | |
| +24 pulse through optocoupler | 01/01/70 00:00 | |
| Schmidt and isolate | 01/01/70 00:00 | |
| 4N35 are being used | 01/01/70 00:00 | |
| I know of none such, but follow the opto | 01/01/70 00:00 | |
| 14 is not clear to me | 01/01/70 00:00 | |
| if the links worked I'd have a look | 01/01/70 00:00 | |
| links fixed | 01/01/70 00:00 | |
| 6 pin schmidt Trigger opto/ isolator | 01/01/70 00:00 | |
seems like good choices | 01/01/70 00:00 |