Profire’s MODBUS expansion card increases productivity and allows oilfield professionals to communicate more efficiently with various applications. Service teams no longer need to manually check each vessel to ensure equipment is working properly with a MODBUS expansion card in place. Vital information, including temperature, pressure, and levels are relayed using the MODBUS expansion card.
| Power Supply Requirements | VALUE |
|---|
| Voltage | PF2100 System Voltage |
| Max Current | The lower of :
(1) the current limit of the PF2100 power supply or
(2) 250 mA thermally fused on the input card |
| Temperature Ratings | Min | Max |
|---|
| Operating Range | -40°C (-40°F) | +60°C (+140°F) |
| Terminal Blocks | VALUE |
|---|
| Maximum Wire Gauge | 16 AWG |
| Communications | VALUE |
|---|
| Protocol | Modbus RTU |
| Baud Rate | 9600 or 19200 bps (user selectable) |
| Parity | None |
| TX to RX Delay | 2 or 25 ms (user selectable) |
| RS-485 Signaling | VALUE |
|---|
| Min Differential Receiver Voltage | 400 mV (A to B) |
| Absolute Max Receiver Voltage | 15 V (A to GND, B to GND) |
| Typical Differential Driver Voltage | 5 V (Y to Z) |
| Maximum Driver Short Circuit Current | +/- 250 mA |
| Termination | None or 120Ω (user selectable) |
| Receiver Input Impedance | 96 kΩ |
