LenelS2 OnGuard — OpenAccess

Access control · P0 · HIGH NDAA OK

Dominant Mercury-host ACS in education when OpenAccess is licensed.

REST over HTTPS · Application-Id header · event subscription

Mercury panels are reached through the host ACS, not directly. This is the common path for Mercury-based K-12 installs on OnGuard.

10events mapped

5health probes

5fixtures

P0catalog tier

Install to site

Licensing: Requires OpenAccess license + Application ID from LenelS2 (via integrator or OAAP).

inventoryhealtheventsdoor_status

acs_lenelacs_onguard

Vendor key	Platform type	Priority	Label
Door Forced Open	door.forced	P1	Door forced open
Door Held Open	door.held	P2	Door held open
Access Granted	door.access_granted	INFO	Access granted
Invalid Badge	door.access_denied	P4	Access denied
Communications Lost	door.comm_loss	P2	Controller communication loss
Alarm Active	io.duress	P1	Duress / panic input
Door Forced Open - Cleared	door.forced	P1	Door forced open
Door Held Open - Cleared	door.held	P2	Door held open
Reader Tamper	io.duress	P1	Duress / panic input
Door Closed	system.heartbeat	INFO	Connector heartbeat

emitted into config/health-probes.json on install · executed by VPS workers

ID	Check	Kind	Params
tcp_reach	TCP reachability	tcp	{"timeout_ms":2000}
tls_cert	TLS certificate validity	tls	{"timeout_ms":3000}
auth_probe	Authenticated API probe	http_probe	{"timeout_ms":5000}
event_lag	Event poll lag < 15s	lag	{"max_lag_s":15}
panel_heartbeat	Panel / unit heartbeat present	heartbeat	{"max_age_s":120}

Method	Path	Purpose
POST	/api/access/onguard/openaccess/authentication?version=1.0	Session token
GET	/api/access/onguard/openaccess/instances?type_name=Lnl_Reader&version=1.0	Reader/door inventory
GET	/api/access/onguard/openaccess/event_subscriptions?version=1.0	Event subscription poll