RIO-28 Specifications
Overall
| Protocol | Modbus RTU |
| Communications Interface | RS-232, RS-485, or wireless |
| Data Interface Rate | 2400, 4800, 9600, 19.2k, or 56k baud |
| Data Interface Parity | none, even, or odd |
| Handshaking | hardware (CTS) |
| Temperature | -30 to +70 °C |
| Error Detection | 16-bit CRC |
| Digital Out Switch | 200mA, 28V max. |
| Digital Input Range | 28V max., Form A |
| Pulse Counting | 300pps max. |
| Pulse Count Depth | 32-bit (>4 billion counts) |
| Pulse Width | 1ms min. |
| Dig. In Debounce | 0 to 255 ms |
| Analog Input Range | 0 to 20mA, 28V max. |
| Analog Output Range | 0 to 20mA, 28V max. |
| ADC Accuracy | better than 1%, 0.2% typ. |
| DAC Accuracy | better than 1%, 0.2% typ. |
Power Requirements
| Input Voltage (standard) | 9 to 15 VDC |
| Input Voltage (-28 models) | 10 to 28 VDC |
| Input Current | 65 to 150 mA |
Mechanical
| Size | 6.25" x 3.50" x 2.25" |
| Mounting | Panel or 1.5" DIN rail |
LED Indicators
| Status | blinks green during normal operation* |
| Busy | blinks yellow while receiving data |
| Transmit | blinks red while transmitting data |
| Error | lit red in mirror mode when communication is lost |
| DO1-DO8 | lit green while DO-n output is on** (pulled to ground) |
| DI1-DI8 | lit yellow while DI-n input is on (pulled to ground) |
* Output will be solid-on during firmware updates.
** Output will blink green rapidly in failsafe mode.
Reset Button
The RIO-28 has one switch which may be accessible from outside the case. Pushing the reset button will quickly reset the device. Holding the reset button for 15 seconds or more will reset the serial mode to 57.6k baud and no parity.
The reset button is disabled during firmware updates to protect the unit.
