Applies to: NOP-IC2 Intelligent Controllers
Summary
This article outlines the behavior and diagnostic meanings of each LED indicator on the NOP-IC2 controller. These LEDs provide real-time feedback for heartbeat status, communication, power, inputs, outputs, and network activity.
NOP-IC2 Status LEDs
| LED | Function | State Description |
|---|---|---|
| HB | Heartbeat | Indicates device operational status:
|
| HOST | RS-485 Data Receive | Flashes on inbound data |
| BUS | Internal Bus Activity | Internal Bus Activity – Flashes repeatedly while data is being exchanged |
| COM1/2 | Serial Port Activity | Flash on TX/RX activity |
| TMP | Cabinet Tamper / Power Fault | Cabinet tamper input status:
Alternates with PFLT when in bootloader |
| PFLT | Power Fault | Power fault input status:
Alternates with TMP when in bootloader |
| RDR1/2 | Reader Activity | Reader Port LEDs
|
| 1–8 | Supervised Inputs | Input status
|
| K1–K4 | Output Relays | Output relay status
|
| PoE PWR | Power over Ethernet | ON = PoE active (NOT SUPPORTED) |
| Ethernet (Speed) | Network Speed | Speed (Left): ON = 100 Mbps |
| Ethernet (Link) | Network Link | Link (Right): Flashing = Network activity |
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