The ETH002-B Ethernet relay board has 2 voltage-free contact SPCO relay outputs with a current rating of up to 16A each, all controlled over TCP/IP via Ethernet. It’s powered via a 12VDC supply, which can be either regulated or unrelated, and the 2.1mm DC input jack has a positive core polarity.
The ETH002-B is the upgraded successor to the ETH002. We have added MQTT with optional TLS encryption. Hostname is now configurable and there is full backward compatibility to the ETH002.
Free Android and Apple apps are available to remotely control this module (links in the Downloads tab).
The relays are SPCO (Single Pole Change Over) types. The normally open, normally closed and common pins are all available on the screw terminals.
Operating Temperature
-40C to +70C
Board Dimensions
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 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.
| Load Type | Typical Applications | Rating |
|---|---|---|
| AC1 | Non inductive or slightly inductive loads | 16A @ 250V AC |
| AC15 | Control of electromagnetic load (>72VA) | 3A @ 120V AC 1.5A @240V AC |
| AC3 | Control of motor | 750W |
| DC1 | Non inductive or slightly inductive loads | 16A @ 24V DC |
| DC13 | Control of electromagnetic loads | 0.22A @ 120V DC 0.1A @ 250V DC |
Precision case
Can be purchased separately .
- Full Factory Reset, all ETH002 firmware and settings can be reset to the original state.
- Firmware updates, firmware in the ETH002 is fully updatable by re-flashing the board with our custom windows program. This will be made available in the event of feature updates.
- New Command Format, the new command format allows for consistent compatibility with future boards. New commands now allow for pulsed control of relays from 100ms to 25.5 seconds
- TCP/IP Password Protection, it is now possible to set a password for TCP/IP protection. This is independent of the configuration password.
- Controlled over TCP/IP via Ethernet.
- Send commands through your local network or Internet to the board.
- Once on the network, commands can be sent to control the relay from within the network or from outside over the Internet
Configuration
By clicking the configuration link it's possible to configure the ETH002 IP address and subnet mask together with the ability to set a password for entry to control screens. The ETH002 now also offers the option to set a password that will be required to change any of the relay states using TCP IP commands, this is explained in the TCP/IP password section.
All settings are saved to memory so be careful to remember the username and password! Default password settings are shown in the picture below.
Version 2 now offers a latched outputs option, this will automatically save any permanent output changes (not pulsed) and restore them following power loss.
Factory Reset
Should it be necessary to reset the ETH002 to its shipped condition then the end two contacts (on the text side) of the row of 5 holes next to robot-electronics.co.uk text must be shorted together at board power up. The green LED should then flash as the settings are reset, please wait until the LED finishes flashing and do not remove power during this period.
ETH002 Command Set
The ETH002 has a new and enhanced command set designed to provide consistent expansion and new features. They are sent over TCP/IP on port 17494 (0x4456). This is the default port, it can be changed in the configuration settings.
| Command | Action | |
| dec | hex | |
| 16 | 10 | Get Module Info, returns 3 bytes. Module Id (18 for ETH002), Hardware version, Firmware version. |
| 32 | 20 | Digital active- follow with 1-2 to set relay on, then a time for pulsed output from 1-255 (100ms resolution) or 0 for permanent Board will return 0 for success, 1 for failure |
| 33 | 21 | Digital inactive- follow with 1-2 to turn relay off, then a time for pulsed output from 1-255 (100ms resolution) or 0 for permanent Board will return 0 for success, 1 for failure |
| 35 | 23 | Digital set outputs - the next single byte will set all relays states, All on = 255 (xxxxxx11) All off = 0 Board will return 0 for success, 1 for failure |
| 36 | 24 | Digital get outputs - send a single byte back to the controller, bit high meaning the corresponding relay is powered |
| 58 | 3A | ASCII text commands (V4+) - allows a text string to switch outputs, see section below |
| 119 | 77 | Get serial number - Returns the unique 6 byte MAC address of the module. |
| 120 | 78 | Get Volts - returns relay supply voltage as byte, 125 being 12.5V DC |
| 121 | 79 | Password entry - see TCP/IP password |
| 122 | 7A | Get unlock time - see section below |
| 123 | 7B | Log out - immediately re-enables TCP/IP password protection |
| Characteristics | ||
| Relays | 2 | |
| Power | 12VDC adapter, >500mA (not included) | |
| DC Plug Type | Type A: 5.5mm OD, 2.1mm ID (IEC 60130-10:1971) | |
| Configuration & Test Interface | HTTP (webpage) | |
| Control Interface | TCP/IP over Ethernet | |
| Relay Current | Up to 16A @ 24VDC or 250VAC | |
| Connections | Screw Terminals for N/O, N/C and common contacts |
|
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