Like the ADA-10/11 models, the ADA-20/21 provide digital relay control. The ADA-20/21 have 2 relays that can be used for strike control and auxiliary output. They also have RS-485 connectors to make reader wiring easier. The ADA-21 has DIPswitch selectable toggle or cumulative modes.
| Make | Apollo Security Sales |
|---|---|
| Manufacturer | Apollo Security |
| Model code | ADA-20/21 |
| Accessories | Relays with toggle and timer |
| Additional info | Like the ADA-10/11 models, the ADA-20/21 provide digital relay control. The ADA-20/21 have 2 relays that can be used for strike control and auxiliary output. They also have RS-485 connectors to make reader wiring easier. The ADA-21 has DIPswitch selectable toggle or cumulative modes. |