| Terms | Applicable Categories |
|---|---|
| UDP Port No. | Programmable Controllers |
| UDP/IP | Programmable Controllers |
| Ue | Safety |
| Ui | Safety |
| Ultrasonic Sensors | Ultrasonic Sensors |
| undertorque detection | Inverters |
| undervoltage | Inverters |
| undervoltage relay (UVR) | Measuring / Motor Protective Relays |
| unit address | Programmable Controllers |
| Unit classification | Programmable Controllers |
| Unit conduction time monitor | Networks |
| unit number | Wireless Components |
| unit number | Programmable Controllers |
| unshielded | Proximity Sensors |
| up counter | Counters |
| UP mode | Counters |
| up/down function | Inverters |
| user adjustment | Networks |
| user program | Programmable Controllers |