Part Number：3402091100 640-34020910XD-1EA 640-34020910XD-2EA

Shipping Term：TNT DHL FEDEX EMS UPS

Condition：100% Original

Product type：Printed Circuit Board Expansion 

Manufacturer：EXTT

The EXTT 3402091100, 640-34020910XD-1EA, and 640-34020910XD-2EA are likely printed circuit board (PCB) expansion modules used in industrial control systems. These expansion boards are designed to provide additional functionality or enhance the capabilities of a base control system. 

Expansion Module: These PCBs are used to expand the capabilities of a central control system by adding more I/O channels, processing power, or specialized functions.

Digital I/O: May include additional digital input and output channels for connecting to switches, relays, and other digital devices.

Analog I/O: Could provide extra analog input and output channels for interfacing with sensors and actuators, handling signals such as 4-20mA, 0-10V, or other standard ranges.

Data Handling: Capable of processing and converting signals to integrate with the main control system, enabling real-time data acquisition and control.

Voltage Requirements: Operates on a specified power supply, commonly 24V DC, but specifics should be verified in the module’s documentation.

Temperature Range: Designed to operate within a specified temperature range, such as -20°C to +60°C or similar, suitable for industrial environments.

Ingress Protection: Enclosure typically rated for protection against dust and water ingress, such as IP65 or IP67.