The NEX DMS4080 Controller is a general purpose hardware platform for data acquisition and control. It features an RS-485 communications port, 4 resistive/digital inputs, and 8 binary outputs.
Digital Outputs
The NEX DMS4080 features 8 binary outputs which deliver a 12VDC voltage typically used for switching interposing relays. DO5 to DO8 are capable of PWM output.
Specifications
| Channels | 8 (4 are PWM capable) |
|---|---|
| Type | Open collector |
| Output voltage | 12VDC |
| Maximum total current | 350mA For example: 8 x 43mA (275Ω), or 1 x 350mA (33.3Ω). |
| Protection | Over current and short circuit protection designed to limit permanent hardware damage. Note: overloading the outputs can cause the controller to shutdown, reset, or malfunction in other ways. |
Resistive/Digital Inputs
The NEX DMS4080 features 4 resistive/digital inputs which can measure a resistive analogue value such as a 10kΩ thermistor, or a digital signal such as a switch.
Specifications
| Channels | 4 |
|---|---|
| Types | Resistance range of 0.1Ω to 200kΩ. |
| Typical inputs | Temperature sensor 10kΩ NTC thermistor. Analogue dial potentiometer input. Volt-free contact (status switch, reed switch, etc). Supervised digital input (break and short detection). Pulse counting input. |
RS-485 Communications Port
The NEX DMS4080 features an RS-485 communication port to allow reading from other devices using Modbus RTU.
Specifications
| Speed | 9600 or 19200 baud |
|---|---|
| Load | 8th unit load (support for up to 256 devices on LAN) |
| Duplex | Half-duplex (2-signal lines) |
| Isolation | 2500 Vrms for 1 minute. ± 15 kV ESD protection. > 25 kV / µs common-mode transient immunity. |