Overview
The ETH484 provides four volt free contact relay outputs with a current rating of up to 16Amp each, 8 digital I/O and 4 analogue inputs. The module is powered from a 12vdc supply which can be regulated or unregulated. The DC input jack is 2.1mm with positive core polarity, DC supplies are required to supply at least 500mA at 12vdc. The relays are SPCO (Single Pole Change Over) types. The normally open, normally closed and common pins are all available on the screw terminals.
A new feature has been added that allows the digital inputs to remotely control relays or digital outputs on ETH008, ETH484 or ETH8020. This offers the opportunity to construct a system where an input can control an output anywhere on the earth provided both locations are connected to the network/internet.
Features
- Relays – 4
- Digital Switching I/O channels – 8
- Analogue Inputs – 4 x 5v 12 bit or 10 bit scaled to 3.3v maximum for backward compatibility
- Power – 12V DC adaptor, supplied separately.
- Configuration & Test interface – HTTP (webpage).
- Control interface – TCP/IP over Ethernet.
- Relay current – Up to 16Amp @24vdc or 250vac
- Connections – Screw Terminals for N/O N/C and Common contacts.
- Ethernet connection – 100mb full duplex
The ETH484-B is the upgraded successor to the ETH484, we have added MQTT and email with both providing optional TLS encryption. Hostname is now configurable and the ETH484-B offers drop in compatibilty to the ETH484.
LED Indication
The ETH484 provides a red LED mounted immediately next to each relay to indicate whether it is in a powered state (LED on), there is also two LED’s mounted in the Ethernet connector which will flash with Ethernet traffic. Finally there is a green power LED just above the processor.
Relay Power Rating
If the contact load voltage and current of the relay are in the region enclosed by the solid and dotted lines in the figure below, the relay can perform stable switching operation. If the relay is used at a voltage or current exceeding this region, the life of the contacts may be significantly shortened.
A full datasheet for the relays used on the ETH484 is here: HF115FD datasheet
Connections
First Test
Having plugged in your 12vdc power supply and Ethernet connection, start up your web browser and type http://eth484 into the address bar, please note this only works in windows.
References
Java network scanner app, easily find your module even on another subnet – Devantech module finder
Examples:
Java – command line application for controlling the module
Perl – Simple example of setting an output active/inactive by tcp
PHP script – Simple example of setting an output active/inactive by tcp
Python V2 – command line application for controlling the module
Python V3 – command line application for controlling the module
Visual C# – source code for simple program, includes UDP scan to determine any boards connected to the local network
Android & iPhone Apps
We have a free app IO network available for Android and iPhone to remotely control your relays, download from Google Play or iTunes. Search for “Devantech” and you will find the app.
