The following table provides a comparison of RUGID RTUs by popular model configurations
| CPU, Flash, RAM, EEPROM | 32-bit, 512K, 256K battery-backed, 0 | 32-bit, 512K, 256K battery-backed, 0 | 16-bit, 60K, 2K battery-backed, 2M |
| Display |
20x40 char/320x240 graphic, LED backlit | 2x16 char |
2x16 char, LED backlit |
| Keyboard | 16-key tactile sealed | 16-key tactile sealed | 16-key tactile sealed |
| Serial Ports | 2 | 2 | 2 |
| Modem | 300/1200 baud audio | 300/1200 baud audio | 300 baud audio |
| Loop Power Supply | 24 VDC isolated, 160 mA | 24 VDC isolated, 160 mA | 24 VDC, 120mA |
| Built-in Diagnostics | Temp, busV, battV, AC fail, low batt V | BattV, AC fail, low batt V | Temp, battV |
| Analog Inputs | 8, 4-20 mA/0-5V, 12-bit, optically isolated | 4, 4-20 mA/0-5V, 12-bit, optically isolated | 6, 4-20 mA/0-5V, 12-bit |
| Analog Outputs |
Not standard for configuration, optional add-on |
Not standard for configuration, optional add-on |
Not standard for configuration, optional add-on |
| Digital Inputs | 16, optically isolated | 8, optically isolated | 8 |
| Relay Outputs |
8, 3 amp mechanical |
4, 10 amp mechanical |
4, 10 amp mechanical OR 0.5 amp solid-state |
| Expansion Slots | 2, any RUG9 expansion card | 2, any RUG9 expansion card | None |
| Additional Expansion | 7 cages, 56 cards, any AI, DI, AO, DO, Combo, Loop | None | None |