CHESTER-X0

This article describes the CHESTER-X0 extension module. Two variant of the CHESTER-X0 module are available: CHESTER-X0A (including 5.0V boost converter) and CHESTER-X0B (without 5.0V boost converter).

Module Drawing

Module Overview

CHESTER-X0B provides 4 independent GPIO channels, CHESTER-X0A includes also 5V boost converter. Each channel can be used for these applications:

• Digital input and output
• Analog input and output
• Voltage input 0-10 V
• Current loop 4-20 mA
• Dry contact input
• NPN and PNP input

Depending on the application these configuration options are available for each channel:

• Enable pull-up resistor 330 kΩ (PUX)
• Enable pull-down resistor 249 Ω (CLX)
• Enable voltage divider 1:10 100 kΩ x 10 kΩ (PDX)
• Enable 5V boost converter (CHESTER-X0A only) (ONX)

Channel Block Diagram

This picture show the electric circuit of each channel:

Configuration Table

The configuration depends on the applicatioon:

Application:	PUx	CLx	PDx
Analog input 0-10V	❌	✅	❌
Analog output 0-VDD	❌	❌	❌
Digital input	❌	?	❌
Digital output	❌	❌	❌
Current loop 4-20 mA	❌	✅	✅
Dry contact	✅	❌	❌
NPN input	✅	❌	❌
PNP input	❌	❌	✅

CHESTER Pin Configuration Diagram

Pin Configuration and Functions

Position	Signal Name	Signal Description
1	VDD	System VDD rail 3.0 V
2	CH1	Channel 1
3	GND	System ground signal
4	CH2	Channel 2
5	CH3	Channel 3
6	GND	System ground signal
7	CH4	Channel 4
8	+V	System positive rail (*)

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