Check the listing for details. Possible Replacement Card For Digi XT09-SI Module. Condition: New. Listed at 325.00 USD. 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.