LP1502 controller, MR52 interface, OSDP readers, REX and strike. Values come from your wiring diagram.
The steps are the same in 7.x and 8.x. 8.3 adds Mercury M-Series and IP client connections. Fields marked Verify in your version were not confirmed in public docs.
System Administration › Access Control › Access Panels
Pick the panel type for the controller, click Add, then fill the Location tab. Lenel names Mercury boards with LNL part numbers: LP1502 = LNL-X2220, EP1502 = LNL-2220.
| Field | Set to | |
|---|---|---|
| Panel type | LNL-X2220 (Mercury LP1502) | Not in this diagram |
| Name | Lobby controller | Not in this diagram |
| Online | Checked | |
| Primary connection | IP address of the LP1502 | Not in this diagram |
| Downstream port baud | 38,400 (match the MR52 switches) | Not in this diagram Verify in your version |
Access Control › Readers and Doors › Add
In OnGuard the MR52 is not its own object. It is the reader Type LNL-1320. Both readers share one address and differ by Reader Number.
| Field | Set to | |
|---|---|---|
| Name | Lobby — Entry | Not in this diagram |
| Panel | Lobby controller | Not in this diagram |
| Type | LNL-1320 (Dual Interface) = MR52 | Not in this diagram |
| Port / Address / Reader Number | Port 2 · Address 0 · Reader 1 | Not in this diagram |
| Output | OSDP | Not in this diagram Verify in your version |
| Card format | Site format, for example 26-bit | Not in this diagram |
Readers and Doors › reader settings
Turn on Secure Channel only if the reader is set for it. Strike time and held-open time are in seconds.
| Field | Set to | |
|---|---|---|
| OSDP address | 0 | Not in this diagram |
| Secure Channel | Off for the first test, then On | Not in this diagram Verify in your version |
| Keypad | None when the reader has no keypad | |
| Strike time | 5 s | Not in this diagram |
| Strike mode | Fail-secure | Not in this diagram |
Readers and Doors › Add
Same MR52 address, Reader Number 2. Pair it with Reader 1 so both readers control one door.
| Field | Set to | |
|---|---|---|
| Name | Lobby — Exit | Not in this diagram |
| Port / Address / Reader Number | Port 2 · Address 0 · Reader 2 | Not in this diagram |
| OSDP address | 0 | Not in this diagram |
| Paired reader | Paired with Reader 1 | Verify in your version |
Readers and Doors › inputs and outputs
Map the door contact, REX and strike to the terminals in the diagram.
| Field | Set to | |
|---|---|---|
| Door contact | MR52 input · NC | Not in this diagram |
| REX | MR52 input | Not in this diagram |
| Strike relay | MR52 relay · fail-secure | Not in this diagram |
Access Control › Timezones, then Access Levels
Make or reuse a timezone, then an access level that includes the new readers. Assign it to a test badge.
| Field | Set to | |
|---|---|---|
| Timezone | Always, or business hours | |
| Access level | Lobby — All hours | |
| Readers in the level | Entry and exit readers | Not in this diagram |
Alarm Monitoring › System Status
Download the panel, then use Open Door(s) to fire the strike. Present a badge, press the REX, and hold the door past the held-open time.
| Field | Set to | |
|---|---|---|
| Expect | Access granted on the readers | |
| Expect | REX releases the strike |
The MR52 is the reader Type LNL-1320 on Readers and Doors, not a separate device. LP1502 is LNL-X2220 and EP1502 is LNL-2220.
Mercury-branded boards can be blocked by the OnGuard license OEM mask. OnGuard expects LNL-branded boards.
Planning aid only. Values are typical and vary by manufacturer, code edition and jurisdiction. Verify with manufacturer data, NEC/NFPA/TIA and the local AHJ. HireLV is not liable for designs based on these tools.