Tyrrell Products


4DI 4DO Expansion Module – 4DI Pulse Counting


Title Range Discount
Standard price 1 - 25 £124.30
Bulk discount 26 - 10000 £114.80

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4DI 4DO Expansion Module - 4DI Pulse Counting On Board IP

4DI 4DO Expansion Module – 4DI Pulse Counting

The 4DI 4DO Expansion Module is designed for building automation systems, offering 4 digital inputs for pulse counting and 4 digital outputs. It features permanent memory storage for counter values and retains the last value during power failures. The module is user-friendly with easy configuration and status LEDs for all inputs, outputs, and communication. It supports RS-485 connection as a Modbus RTU slave, with an option for IP connection for Modbus TCP. The slave ID and baud rate are configured using DIP switches. This module is an essential addition for efficient and reliable building automation.


• Expansion Module for Building Automation Systems
• 4 Digital Inputs (Pulse Counter)
• 4 Digital Outputs
• Counter Value Stored in Permanent Memory.
• Last Value Held in Memory During Power Failure.
• User Friendly Configuration
• Status LEDs for all Inputs, Outputs and
• RS-485 Connection as Modbus RTU Slave
• Option for IP connection for Modbus TCP
• Slave ID and Baud-rate Configured with DIP


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