Technical parameters
The following article contains technical details of communication interfaces on Neuron units, as well as the unit's storage, installation and working conditions.
Neuron
RS485 interface
| Terminals | RS485-A, RS485-B |
| Galvanic isolation | Yes |
| Isolation voltage | 1000 V |
| ESD protection | ±15 kV |
| Communication speeds | 2400 bps 4800 bps 9600 bps 19200 bps 38400 bps 57600 bps 115200 bps |
| Input impedance | 12 kΩ |
| Input voltage hysteresis | 70 mV |
| Output characteristic | ±2.5 V |
| Terminating resistor | Built-in attachable 120 Ω (RS485-END) |
| RS485 pull-up / pull-down resistors | 560 Ω / 560 Ω |
Other I/O ports and interfaces (RPi3)
| Ethernet port ETH | 10/100 Mbit/s |
| USB port | 4x USB 2.0 |
| System storage | Micro SD (max. 32 GB) |
Other I/O ports and interfaces (RPi4)
| Ethernet port ETH | 10/100/1000 Mbit/s |
| USB port | 2x USB 3.0 + 2x USB 2.0 |
| System storage | Micro SD (max. 32 GB) |
Storage, installation and working conditions
| Working temperature | 0 °C .. +55 °C |
| Rated voltage -SELV | 24 V⎓ (±5%) |
| Reverse polarity protection | Yes |
| Storage conditions | Temperature: -25 °C .. +70 °C Humidity: 10 % .. 95 %, w/o aggressive substances, condensing vapours or fog |
| Electric strength | according to EN 60950 |
| Ingress protection (IEC 529) | IP20 |
| Working position | Vertical |
| Installation | To a 35 mm DIN rail in an electrical distribution box |
| Connection | Pluggable screw terminals |
| Wire gauge | Max. 1,5 mm2 for 1-Wire Max. 2,5 mm2 for other terminals |
| Terminal spacing | 3,5 mm for 1-Wire 5,08 mm for other terminals |
| Terminal tightening torque | Max. 0,4 Nm |
