| ??? 09/08/08 12:39 Read: times |
#158060 - RS-485 is the answer Responding to: ???'s previous message |
1. single phase UPS - 2 EM chips, 1 controller with 2 serial ports
2. 3 ph in 1 ph out UPS : 4 EM chips (or 2), 1 controller with 4 serial ports or 2 serial ports. 3. 3 ph in 3 ph out - 2 3 phase EM chips (cost is almost 5 times the cost of 1 ph EM chip) or 6 1 ph EM chips - 1controller with 2 serial ports or 6 serial ports. Erik BTW I know of no analog switch that can handle the voltages (constant or spikes) you will be dealing with. |
| Topic | Author | Date |
| Energy meter chips for non-energy meter applicatio | 01/01/70 00:00 | |
| Not necessarily | 01/01/70 00:00 | |
| 2 chips... | 01/01/70 00:00 | |
| RS-485 is the answer | 01/01/70 00:00 | |
| SPI is available | 01/01/70 00:00 | |
| How much filtering? | 01/01/70 00:00 | |
| 15 cycles is fine!! | 01/01/70 00:00 | |
| 5 to 6% accuracy | 01/01/70 00:00 | |
| 5 to 6% accuracy ??? | 01/01/70 00:00 | |
Accuracy | 01/01/70 00:00 | |
| APFC not APF | 01/01/70 00:00 |