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ETH002-B

Technical Documentation

Overview

The ETH002-B is a drop in update of the ETH002 with additional upgrades.

The ETH002-B provides two volt free contact relay outputs with a current rating of up to 16A. 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

with the normally open, normally closed and common pins all available on the screw terminals.

New features and improvements over the ETH002 are:

100mb full duplex Ethernet connection (ETH002 was 10mb half duplex)

Hostname is now configurable

MQTT with optional TLS encryption

Operating temperature

-40C to +70C

LED indication

The ETH002-B 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.

Summary of content (11 pages)

PAGE 1
ETH002-B Technical Documentation Overview The ETH002-B is a drop in update of the ETH002 with additional upgrades. The ETH002-B provides two volt free contact relay outputs with a current rating of up to 16A. 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.
PAGE 2
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. load type Typical applications Rating AC1 Non inductive or slightly inductive loads 16A @ 250V AC AC15 Control of electromagnetic load (>72VA) 3A @ 120V AC 1.
PAGE 3
Connections 16A VFC (Volt Free Contacts) NC = normally connected, C = common, NO = normally open 12v dc 2.1mm jack (+ve core) Factory reset Left pair - run RJ45 Ethernet Right pair – reset Read at power up Network connection and Http access IP Addresses & DHCP Servers The easiest way to use the ETH002-B is to connect it to a network with a DHCP server. In this case the ETH002-B will have its IP address assigned automatically by the DHCP server.
PAGE 4
Accessing the ETH002-B from your browser Having plugged in your 12vdc power supply and Ethernet connection the board will power up and request an IP address from the dhcp server, if no server is present then the board will default to IP address 192.168.0.200. Now please start up your web browser and type http://eth002 into the address bar, please note this only works in Windows.
PAGE 5
Configuration By clicking the configuration link it's possible to configure the ETH002-B IP address and subnet mask together with the ability to set a password for entry to control screens. The configuration page also offers the option to set a password that will be required to change any of the relay states or digital outputs using TCP IP commands, this is explained in the TCP/IP password section.
PAGE 6
HTTP commands DOAx and DOIx (V4+ firmware needed) A customer requested feature, allowing the digital outputs to be switched by the Http get function such as used in some voice over ip phones (VOIP). You can use the Http get function to write to the io.cgi file with the following syntax: 192.168.0.200/io.cgi?DOA2=10 This would use the default address (192.168.0.200) and make output 2 active for 1 second. Another example would be to set output 1 inactive for 10 seconds: 192.168.0.200/io.
PAGE 7
TCP/IP Password If this option is enabled in the Http configuration page then a password will be required to be entered before relay states can be changed. In the following example the password was set to "apple": 0x79 - 1st byte in frame sent to ETH002-B to indicate password entry 'a' (0x61) - 2nd byte in frame (ASCII hex equivalent in brackets, http://www.asciitable.
PAGE 8
Access from the Internet The ETH002-B can be controlled over the internet almost as easily as on your local network. Your network will most likely be connected to the internet with a broadband router. This will provide NAT (Network Address Translation) and Firewall services. To access the ETH002-B from the internet you will need to open up port 17494 (0x4456) to allow incoming TCP connections. Be careful not to open up any other ports.
PAGE 9
TCP Test program and example source code To get the ETH002-B up and running in the minimum amount of time we have put together an example program and also full source code for this program. You may examine this code or use it as a starting point for your own application. Visual studio express is provided free from Microsoft: http://www.microsoft.
PAGE 10
Software updates With our software update tool you can upgrade the firmware to get the latest features Latest firmware V21– Fixes an issue with the saving of a DNS server fixed IP address.