Applies to: NHP-P100 Controller, NHP-P200 Controller
Summary
The NHP-P100 and NHP-P200 controllers feature a 3-position hardware switch located just above the output terminal block. This switch determines the type of voltage (or dry contact) that the onboard relay output provides.
The output switch defines the voltage behavior of the onboard relay output. It is physically located just above the 4-terminal output block on the controller. This article describes the features and uses for the output selector switch.
Switch Positions
| Position | Function | Description |
| Center | Dry Contact (Default) | The relay operates as a standard mechanical dry contact switch (no voltage supplied). |
| Up | 24VDC Output | The relay will provide 24VDC power when active. |
| Down | 12VDC Output | The relay will provide 12VDC power when active. |
IMPORTANT: Applying external voltage while the switch is set to 12VDC or 24VDC may damage
the board.
Output Terminal Block Pinout
The onboard output uses a 4-terminal block configured as follows:
-
Dry Contact Mode: Use NC/COM or NO/COM to connect to downstream relay-driven devices.
- Voltage Output Mode: Use NO (+VDC) or NC(+VDC) and GND (-) for powered output.
NOTE: Dry Contact is ideal for applications where a separate power source is used
(e.g., powering a maglock or triggering an auxiliary relay).
24VDC/12VDC Modes are useful for directly powering low-current devices without needing
a separate power supply.
Always confirm the switch position before wiring devices.
| Terminal | Function |
| NC | Normally Closed |
| COM | Common Contact |
| NO | Normally Open |
| GND | Ground Reference (used with voltage output modes only) |
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