Possible Replacement Card For XT09-SI Module.
The Viking Scada Xtend Module (“VS”) is a long range wireless communication module designed for many industrial applications. It operates on the 902.125 - 928.125 MHz frequency band at a power of 1 Watt, and does not require a license for operation.The module is designed with a 20 pin connection making it a possible direct plug in replacement for the obsolete Digi or Maxstream XT09-SI module. Using proprietary transmission techniques it typically provides a communication range much greater than the Digi modules.
Note there are several differences between the VS module
and Digi XT09-SI Module:
1. Baud rates supported. The VS module has a fixed baud rate of 9600. The Digi module supports many baud rates, so the application must be set to 9600 to use the VS modules.
2. RF protocol. Digi modules use spread spectrum technology, VS uses Lora technology so Digi modules cannot communicate with VS modules. All modules in a system must be VS.
3. RF channels. Digi modules support ten channels, VS modules 27 channels. Since the Digi channel is set by a serial configuration command the number of channels are limited to ten. To allow full use of all channels on the VS modules the channel is set not by serial commands but by connecting via WiFi (using your phone) to the VS module and choosing the desired channel. The VS module provides its own WiFi network to allow configuration - it does not need access to another network or the internet. This configuration only has to be done once for each module.
4. Range. The VS modules have a much longer range than the Digi modules using similar antennas, so applications may be possible that were not feasible using Digi modules.
5. Polling time. At 9600 baud Digi modules typically can poll at about 200mS; the VS modules take about 700mS so polling rates may need to slowed down slightly by the application.
6. Antenna connector. The VS and Digi modules have reversed pin polarity on the antenna connection, so a small adapter may be required when replacing a Digi module with a VS module using existing antenna connectors.
The VS Module is designed with a compact form factor, measuring just 62mm x 37mm, the same as the Digi modules. It is pin compatible with the Digi module and operates on the same supply Voltage of 5 VDC. This makes it easy to integrate into a variety of IoT devices and systems.
Overall, the combination of long-range communication and Wi-Fi connectivity makes the VS Module a powerful and versatile solution for a wide range of IoT applications and can be used where long-range, low-power communication is required.