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This article describes the CHESTER-X2 extension module.

Module Overview

CHESTER-X2 provides TTL/UART interface and RS-485 interface (e.g., for Modbus communication).

CHESTER Pin Configuration Diagram

Pin Configuration and Functions

PositionSignal NameSignal Description
1GNDSystem ground signal
2VDDSystem VDD rail 3.0 V
3RXUART receiver input
4TXUART transmitter output
5ENEnable input
6BBus input/output
7ABus input/output
8+VSystem positive rail (*)

*Note: The system positive rail voltage depends on CHESTER power supply option.

Schematic diagram

A schematic diagram is useful if you program low-level hardware-related code or if you're just curious about how the system is designed.

Module Drawing