|Save||Go to Replacement product|
|Brand||Apollo Security Sales|
|Accessories||Relays with toggle and timer|
|Model 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.|
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