Issue
What Ethernet port speeds are supported by Sigma controllers?
Product Line
Satchwell BAS & SigmaEnvironment
- Sigma controllers
- ARM 7(S-696, S-x96CPU-AE, S-796, S-x796CPU-AE, S-DNN3, S-DNN3-DT, S-632-E, S-632-AE and S-IC3's)
- V53 (S-ETH, S-496, S-596, S-532, S-DNN and S-IC's)
Cause
Sigma controllers come in different hardware generations. The newer ARM-7 based controllers support more Ethernet connection speeds and auto-negotiation features compared to the older V53-based controllers, which are more limited.
Resolution
Supported Ethernet Speeds by Hardware Type
| Hardware Type | Ethernet Speed | Duplex Mode | Auto-Scan Support |
|---|---|---|---|
| ARM-7 (New) | 100Base-T | 100M Half Duplex | ✅ Yes |
| 10Base-T | Full/Half Duplex | ✅ Yes | |
| V53 (Old) | 10Base-T | 10M Half Duplex | ❌ No |
🔌 Cable Type Requirements for Direct Connection
| Hardware Type | Straight Cable | Cross-over Cable |
|---|---|---|
| ARM-7 (New) | ✅ Supported | ✅ Supported |
| V53 (Old) | ❌ Not Supported | ✅ Required |
📘 Additional Notes
- Most modern Ethernet switches and hubs auto-negotiate the best speed and duplex settings.
- When troubleshooting connectivity issues, verify:
- Cable type used (especially for older V53 hardware)
- Switch port configuration (fixed speed vs auto-negotiation)
- Controller hardware version
