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Sentinel S-40 Access Control Panel
Networked four-door controller · PoE+ · wall-mount
The Sentinel S-40 is a four-door access-control panel powered over Ethernet. This guide covers wall mounting, reader and lock wiring, network connection and first power-up. Allow about 45 minutes for a single-panel install.
Caution
Isolate power before wiringDisconnect the PoE feed at the switch before terminating any cable. Locks can hold a charge, so discharge auxiliary supplies before working on the relay terminals.
What you'll need
- PoE+ switch or midspan (802.3at) with a spare port
- Cat 6 patch lead and cable to each reader and lock
- M4 pan-head screws and wall plugs (×4) for the enclosure
- Torx T10 driver, small flat screwdriver and a cable tester
- Laptop or phone on the same network for commissioning
Mount the enclosure
- Mark the four keyholes from the enclosure back-box at eye level, away from mains cabling.
- Fix the back-box to the wall with the supplied M4 screws and plugs.
- Land the reader, lock and Ethernet cables through the lower gland plate.
- Leave 150 mm of service loop inside the enclosure before terminating.
Terminal connections
| Terminal | Function | Notes |
|---|---|---|
| PoE IN | 802.3at power + data | From the PoE+ switch port |
| RDR 1–4 | Wiegand / OSDP reader | 12 V, D0/D1 or RS-485 A/B |
| LOCK 1–4 | Dry relay, 2 A | Fail-safe or fail-secure per door |
| REX 1–4 | Request-to-exit input | Volt-free contact |
| DC 1–4 | Door-contact input | Normally-closed monitored |
| AUX 12V | Auxiliary output | Shared 12 V, 1.5 A total |
Pre-power checks
- Reader and lock polarity confirmed against the wiring label
- No short between 12 V and 0 V at any terminal
- Lock free-wheel diode fitted across each DC lock
- Ethernet drop tests good end-to-end on the cable tester
- Enclosure earth bonded to the building earth bar
First power-up
- 1step 1
Patch PoE IN to the switch - 2step 2
Wait for the status LED to go green - 3step 3
Sign in at the panel IP - 4step 4
Set a password and enrol the doors
Verify the installation
- Status LED steady green after the panel joins the network
- Each reader beeps and flashes on a valid test card
- Each lock releases and re-secures on a granted card
- Request-to-exit releases the matching door
- Door-contact state reports correctly in the controller