| ??? 08/25/05 12:14 Read: times |
#100065 - safety systems Responding to: ???'s previous message |
In some of our instruments, I subsume safety critical stuff to hardwired relay logic, or a Millenium II PLC. Mostly I am concerned with people not raising a certain part, spinning at 3000 RPM plus, out of its cell. There is a limit switch and a relay circuit. Raise the part and the motor goes off. Lower the part and the motor STAYS off, until a separate switch is cycled. This co-incidentally tells the 8052 system that the motor interlock is engaged. Also, when the mains is cycled, the instrument goes into interlock.
Steve |
| Topic | Author | Date |
| EU legislations | 01/01/70 00:00 | |
| What an how.. | 01/01/70 00:00 | |
| Saferty critical | 01/01/70 00:00 | |
| Indutrial machinary | 01/01/70 00:00 | |
| BSI | 01/01/70 00:00 | |
| bag of worms | 01/01/70 00:00 | |
| IEC 61508 | 01/01/70 00:00 | |
| safety systems | 01/01/70 00:00 | |
| I recall | 01/01/70 00:00 | |
| simce nobody ventured a guess, here it i | 01/01/70 00:00 | |
| Only in America? | 01/01/70 00:00 | |
Here ? | 01/01/70 00:00 |