Table of Contents
Technical parameters
Neuron
The following article contains technical details of communication interfaces on Neuron units, as well as the unit's storage, installation and working conditions.
Connector description
| Terminal marking | Meaning |
|---|---|
| +24V | Power terminal - positive pole |
| GND | Power terminal - negative pole |
| DI | Digital input |
| DIGND | Digital input common terminal – negative pole |
| DO | Digital output |
| DOGND | Digital output common terminal – negative pole |
| FBD | Flyback diode |
| RO | Relay output |
| COM | Digital output common terminal – negative pole |
| AI | Analog input |
| AIS | Power supply of the relevant AI |
| AOR | Analog output (voltage or current ) / resistance measurement |
| AOV | Analog output (voltage only) |
| AGND | Analog input/output common terminal - negative pole |
| RS485-A/RS485-B | RS-485 communication line terminals |
| RS485-END | Connectable terminating resistor of RS-485 communication line |
| ETH | Ethernet port |
| USB | USB A 2.0 port |
| microSD | micro SD card slot |
Storage, installation and working conditions
| Working temperature | 0 °C .. +55 °C |
| Rated voltage - SELV | 24 V⎓ (±5%) |
| Power consumption | Max. 12 W - 22 W depending on model |
| 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 |
Inputs/Outpus technical parameters
Digital inputs
| Input type | SINK |
| Input terminal | DI |
| Common ground | DIGND |
| Log. 0 | < 3 V DC |
| Log. 1 | > 7 V DC |
| Maximum voltage | 35 V DC |
| Non-defined state | 3-7 V DC |
| Input resistance for TRUE | 6 200 Ω |
| Voltage drop on DI diode | 1.2 V |
| Minimum pulse length | 20 μs |
| 0–>1 / 1–>0 delay | Typ. 20 μs / 60 μs |
| Maximum CNT counter input frequency | 10 kHz |
| LED indication | Yes |
| Galvanic isolation | Yes (Basic, between DI groups) |
| Insulation voltage (pulse) | 1500 V |
Digital outputs
| Output type | SINK (NPN - open collector) |
| Output terminals | DO |
| Common ground | DOGND |
| Switching voltage | 5–50 V DC |
| Switching current continuous/pulse | 750 mA / 1 A |
| Max. total group* load | 1 A |
| Inductive load handling | Integrated FBD diode (optional) |
| Switching period (open/close) | Typ. 130 ns / 20 ns |
| Maximum PWM resolution | 16 bits |
| Maximum PWM frequency | 200 kHz |
| Galvanic isolation | No |
| Overcurrent protection | No |
Relay outputs
Please note: The data below represent a selection of the most important parameters and serve only as a quick reference.
Detailed information can be found in the product datasheet provided by the relay manufacturer: FTR-F3AA024E-HA
| Output type | Electromechanic non-shielded relay |
| Output terminal | RO |
| Common terminal | COM |
| Contact type | Normally open (SPST-NO) |
| Used relay type | FTR-F3AA024E-HA |
| Maximum switching voltage | 250 V AC 30 V DC |
| Maximum switching current | 5 A |
| Maximum common terminal current | 10 A |
| Short-term current overload | 5 A |
| Mechanical lifespan | 5 000 000 |
| Electrical lifespan | Up to 100 000 (according to the connected load) |
| Operate/release time | 10 ms |
| Designed for load character | AC-15, DC-13 (resistive) |
| Load handling | External (RC, varistor, diode, thermistor) |
| Short circuit protection | No |
| Overvoltage protection | No |
| LED indication | Yes |
| Galvanic isolation | Yes (Basic) |
| Insulation voltage (pulse) | 2500 V between RO and RO 4000 V between RO and all other circuits |
Analog inputs
| Section 1 (AI1) | Sections 2,3 + some units (eg. S5xx) | Section 2 (M537) | |
|---|---|---|---|
| Input terminals | AI | AI, AIS | AI |
| Common ground | AGND | AGND | AGND |
| Input modes | 0–10 V⎓ voltage meas. 0–20 mA current meas. | 0–10 V⎓ voltage meas. 0–2.5 V⎓ voltage meas. 0–20 mA current meas. 0–1960 Ω resistance meas. 0–100 kΩ resistance meas. | 0–10 V⎓ voltage meas. 0–2 V⎓ voltage meas. 4–20 mA current meas. 2 kΩ (75–2000 Ω) resistance meas. 20 kΩ (1–20 kΩ) resistance meas. |
| Maximum input voltage | 12 V DC | 15 V DC | 15 V DC |
| Input resistance (voltage meas.) | 66 kΩ | 44 kΩ | 12 kΩ ±20 % (0–10 V) 1 MΩ ±50 % (0–2 V) |
| Input resistance (current meas.) | 100 Ω | 100 Ω | 100 Ω ±1 % |
| Accuracy | ±0.5 % | ±0.2 % | ±0.2 % (0–10 V, 4–20 mA) ±1 % (0–2 V) ±0.3 % / 0.5 Ω (2 kΩ) ±1 % / 10 Ω (20 kΩ) |
| Resolution | 12 bits | 16 bits (voltage and current meas.) 24 bits (resistance meas.) | 24 bits |
| Conversion time | 10 μs | 60 μs (voltage and current meas.) 400 ms (resistance meas.) | 200 ms |
| Protection type | Integrated overvoltage | Integrated overvoltage | Integrated transil |
| Galvanic isolation | No | Yes (from other sections*) | Yes, 1500 V (pulse)(between AI and from other sections*) |
Analog outputs
| Section 1 | Sections 2,3 + some units (eg. S5xx) | |
|---|---|---|
| Output terminals | AOR | AOV |
| Common conductor | AGND | AGND |
| Output functions | 0–10 V DC voltage source 0–20 mA current source 0–1960 Ω resistance meas. | 0–10 V DC voltage source |
| Output voltage range | 0-10 V DC | 0-10 V DC |
| Output current range | 0-20 mA | — |
| Maximum output current | 20 mA | 20 mA |
| Output accuracy | ±0.5 % | ±0.5 % |
| Resolution | 12 bits | 12 bits |
| Conversion | 1 ms | 300 μs |
| Protection type | Integrated overvoltage | Integrated overvoltage |
| Galvanic isolation | No | Yes (from other sections*) |
Interface technical parameters
RS485 interface
| Terminals | RS485-A, RS485-B |
| Galvanic isolation | Yes (basic) |
| 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) |