The ADC-AC-ET20 mounts to a standard single gang box and reads proximity, MIFARE DESFire and Alarm.com mobile credentials from the same faceplate. That lets a site keep issuing the badges it already owns while it transitions to encrypted smart credentials, instead of rebadging the whole building on cutover day.
Built for the commercial installer
Wiegand and OSDP are both supported out of the box, and the reader is OSDP Verified by SIA for Secure Channel. That matters on a retrofit: land it on the existing Wiegand run today and move the site to encrypted OSDP later without pulling the reader back off the wall. Accelerometer-based tamper detection is built in, so you are not adding a separate tamper switch behind the plate.
Rated IP55 and -31F to 151F, it holds up at covered exterior openings and in unconditioned space. It works with Mercury and Aero Series hardware, so it drops into an Alarm.com Access Control deployment without a separate reader interface. Made in the USA.
Key features
- One reader for three credential types: 125 kHz proximity, MIFARE DESFire smart credentials, and Alarm.com mobile credentials
- Wiegand and OSDP compatible, so it fits both legacy panels and encrypted Secure Channel deployments
- OSDP Verified by SIA, the specification many commercial and government jobs now require
- Built-in accelerometer tamper detection, no separate tamper hardware to mount and wire
- IP55 rated for covered exterior openings and unconditioned interior space
- Made in the USA and certified to UL 294 for access control system units
System requirements
Requires 5-16 VDC, 169 mA max and an Alarm.com Access Control deployment running Mercury or Aero Series hardware. Alarm.com Mobile Access Credential support requires this reader family. Note that EV2 smart credentials must be Alarm.com or WaveLynx branded to read.
Specifications
| SKU | ADC-AC-ET20 |
|---|---|
| Brand | Alarm.com |
| Output | OSDP, Wiegand, accelerometer-based tamper detection |
| Dimensions | 5.1 x 3.3 x 0.7 in (13.0 x 8.4 x 1.8 cm) |
| Form factor | Single gang mount reader |
| Power input | 5-16 VDC, 169 mA max |
| RF technologies | 125 kHz, 13.56 MHz, NFC, Bluetooth Low Energy |
| Credentials | MIFARE DESFire EV1, EV2, EV3, LEAF, FSK and ASK proximity |
| Read ranges | EV1: 1.2 in, EV2: 2.2 in, EV3: 1 in cards / 3 in keyfobs, 125 kHz up to 4 in |
| Weather rating | IP55 |
| Operating temp | -31F to 151F (-35C to 66C) |
| Operating humidity | 5 to 95% RH, non-condensing |
| Compatibility | Alarm.com Access Control with Mercury and Aero Series hardware |
| Compliance | FCC, IC, CE, UL 294, EN 302291, EN 301489, EN 300330, EN 50130-4, BIS IS 13252 |
| Country of origin | USA |
| Device weight | 10 oz |