| Terms | Applicable Categories |
|---|---|
| R/L | Temperature Controllers |
| rack number | Programmable Controllers |
| radiation fin | Inverters |
| rainwater | Level Switches |
| ratchet | General Purpose Relays |
| rate of change calculations | Networks |
| rate of change limit | Temperature Controllers |
| rated current | Inverters |
| rated frequency | Limit Switches |
| rated impulse withstand voltage | Safety |
| rated insulation voltage | Safety |
| rated operating current | Safety |
| rated operating voltage | Safety |
| rated output | Servomotors / Servo Drivers |
| rated output current | Inverters |
| rated power consumption | General Purpose Relays |
| rated torque | Inverters |
| rated voltage | Solid-state Relays |
| reactive power | Control |
| reactor | Inverters |
| recipe | Programmable Terminals |
| reduced resolution blanking | Safety Sensors |
| reduced torque characteristics | Inverters |
| redundancy | Safety |
| Reflector | Photoelectric Sensors |
| Reflector with Anti-fog Coating | Photoelectric Sensors |
| regeneration | Inverters |
| regeneration resistance | Servomotors / Servo Drivers |
| Regenerative Braking Function | Inverters |
| regenerative energy | Servomotors / Servo Drivers |
| Inverters | |
| relay error | Programmable Controllers |
| relay with polarity | General Purpose Relays |
| Relays | Control |
| release bounce time | General Purpose Relays |
| release key | Safety Door Switches |
| release time | Solid-state Relays |
| Timers | |
| releasing travel | Push Buttons / Indicator Lamps |
| remote control function | Power Supplies |
| remote I/O | Programmable Controllers |
| remote programming and monitoring | Programmable Controllers |
| remote sensing function | Power Supplies |
| remote set point input | Temperature Controllers |
| remote SP | Temperature Controllers |
| remote/local | Temperature Controllers |
| repeat accuracy | Temperature Controllers |
| repeat function | Programmable Terminals |
| repeatability | Temperature Controllers |
| repeater | Wireless Components |