24VDC expansion module, 4/4 in/out relay LOGIC-8ER-D 004780008

ETI Logic Programmable Relay Expansion Module

This expansion module, catalog number 004780008, is designed to increase the functionality of ETI LOGIC 12HRD and 20HRD programmable relays. It allows adding four digital inputs and four digital outputs, increasing the flexibility and control possibilities in automation installations.

Characteristics and application

The 8ERD module operates at 24V DC and uses relays as digital outputs. This enables control of various loads, such as lighting, heaters or ventilation systems. The output current of each relay is 8A, ensuring compatibility with most standard devices. The module's design allows for easy integration with an existing system – mounting is done on a DIN TH35 rail.

Construction and parameters

The module has compact dimensions – 38 mm width, 90 mm height and 59.6 mm depth – making it easy to install even in limited space. It uses a DC supply voltage in the range of 24-24V. The use of relays as digital outputs ensures reliability and resistance to interference. The ability to communicate via additional modules (Profibus-DP, DeviceNet, Modbus RTU, Ethernet TCP/IP) expands the functionality of the entire automation system. The IP20 protection class provides protection against touching solid foreign objects with a diameter greater than 12.5 mm. Wire connection is AWG 12 / Ø 3.5 mm.