The front panel of the A421 Series Electronic Temperature Control has an LCD and a three-button UI (Figure 1).
Figure 1. A421 Control front panel with LCD and three-button
UI
| Callout | Description |
|---|---|
| 1 | Liquid crystal display |
| 2 | Binary input indicator |
| 3 | Temperature units indicator |
| 4 | Operating mode indicator. You can use the indicator to heat or cool. |
| 5 | Up tab |
| 6 | Relay status |
| 7 | Down tab |
| 8 | Menu tab |