HA-EA Hardware Documentation

This document briefly describes all relevant features and shows the hardware specs of current HA-EA models. HA-EA is a range of devices that provide I/O to control devices and systems (e.g. heating and irrigation plants, lighting, domotics) and gather environmental data over an IP-based network.

Created: 16/07/2020
Last modified: 11/10/2021
Version: 4
Created by: Lukas D'Angelo

Model & feature overview

Model	Ethernet interface	WiFi interface	Relay outputs	Digital inputs	Sensor BUS	Extension module
HA-EA-S	none	802.11b/g/n	8	0	1-Wire	HA-EA-S-EXT
HA-EA-ETH	10/100BASE-T	802.11b/g/n	8	0	none	HA-EA-S-EXT
HA-EA-I16	10/100BASE-T	802.11b/g/n	0	16 x 230V~	1-Wire	none
HA-EA-TL	none	802.11b/g/n	0	0	1-Wire	yes
HA-EA-R	none	802.11b/g/n	2	2 x 230V~	1-Wire	none

Ethernet interface

A WIZnet W5500 IC provides ethernet connectivity. Auto negotiation is enabled by default, PHY-speed and DUPLEX-capability are gathered automatically. The TCP/IP stack is offloaded to the W5500 IC in order to reduce the load on the microcontroller when ethernet is used.

WiFi interface

The integrated WiFi-controller of the ESPRESSIF ESP8266 MCU is used to provide wireless connectivity.

Wireless Interface
Protocol	802.11b/g/n
Frequency-Range	2400MHz - 2483.5MHz
Security	WPA/WPA2
Encryption	WEP/TKIP/AES
RX-Sensitivity 802.11b	-91dBm
RX-Sensitivity 802.11g	-75dBm
RX-Sensitivity 802.11n	-72dBm
TX-Power 802.11b	+20dBm
TX-Power 802.11g	+17dBm
TX-Power 802.11n	+14dBm

Relay outputs

FUJITSU JV-5-KT relays (normal-open-contacts) are used to generate the digital output control signals. JV Series Datasheet

Digital inputs

The digital inputs are designed to sense the presence of 230V AC voltage. They can also be configured to sense DC or AC voltages (< 325V DC or < 230V AC) by populating the input stages of the devices with the appropriate resistors and capacitors for the desired voltage. The sampling period of the digital inputs is set to 1ms.

Note: All inputs share the same reference terminal (CM).

Sensor BUS

The sensor BUS is based on the Dallas Semiconductor 1-Wire protocol. Supported 1-Wire sensors:

DS18B20

Extension module & stack operation

HA-EA-S and HA-EA-ETH (master) modules can be extended with HA-EA-EXT (slave). The extension module is a plug and play module, it does not need to be configuerd explicitly, only the master module has to be configured to enable stack operation. A master module can be extended with up to 5 extension modules, so the maximum number of relay outputs acheivable with one master module is 48. The master and slave modules are connected via a SPI BUS (5-PIN MOLEX PICOBLADE 1.25mm pitch connector).

HA-EA-S Stacking

Mechanical & electrical specification

HA-EA-S/HA-EA-EXT

HA-EA-S Dimesnsions

Dimensions and weights
PCB length	100mm
PCB width	72mm
PCB thickness	1.6mm
Max. device height	20mm
Weight	90g
Mounting hole diameter	3.2mm
DIN-Rail Mount Profile	UM72

Electrical specifications
Min. supply voltage DC-IN	5V DC
Max. supply voltage DC-IN	6V DC
Typ. current consumption	0.2A
Max. current consumption	0.5A
Built-in PTC fuse	1A
Reverse polarity protection	YES
Serial interface level	3.3V
Max. relay switching current (resistive)	5A
Max. relay switching voltage	250VAC/30VDC
Max. relay switching power	1250VA/150W
Max. wire cross section relay terminals	1.5mm²
Max. wire cross section DC-IN	1.5mm²
Max. wire cross section W1	1mm²

Note: Applies to HW-Version 0.3

HA-EA-ETH

HA-EA-ETH Dimesnsions

Dimensions and weights
PCB length	100mm
PCB width	72mm
PCB thickness	1.6mm
Max. device height	20mm
Weight	95g
Mounting hole diameter	3.2mm
DIN-Rail Mount Profile	UM72

Electrical specifications
Min. supply voltage DC-IN	5V DC
Max. supply voltage DC-IN	6V DC
Typ. current consumption	0.3A
Max. current consumption	0.6A
Built-in PTC fuse	1A
Reverse polarity protection	YES
Serial interface level	3.3V
Max. relay switching current (resistive)	5A
Max. relay switching voltage	250VAC/30VDC
Max. relay switching power	1250VA/150W
Max. wire cross section relay terminals	1.5mm²
Max. wire cross section DC-IN	1.5mm²
Max. wire cross section W1	1mm²

Note: Applies to HW-Version 0.2

HA-EA-I16

HA-EA-I16 Dimesnsions

Dimensions and weights
PCB length	140mm
PCB width	90mm
PCB thickness	1.6mm
Max. device height	20mm
Weight	95g
Mounting hole diameter	3.2mm
DIN-Rail Mount Profile	UM90

Electrical specifications
Min. supply voltage DC-IN	5V DC
Max. supply voltage DC-IN	6V DC
Typ. current consumption	0.3A
Max. current consumption	0.3A
Built-in PTC fuse	1A
Reverse polarity protection	YES
Serial interface level	3.3V
Max. wire cross section input terminals	1.5mm²
Max. wire cross section DC-IN	1.5mm²
Max. wire cross section W1	1mm²

Note: Applies to HW-Version 0.1

HA-EA-TL

Dimensions and weights
PCB length	30mm
PCB width	36mm
PCB thickness	1.6mm
Max. device height	20mm
Weight	–g
Mounting hole diameter	2.5mm
DIN-Rail Mount Profile	custom

Note: Hardware work in progress

HA-EA-R

Dimensions and weights
PCB length	48mm
PCB width	46mm
PCB thickness	1.6mm
Max. device height	20mm
Weight	40g
Mounting hole diameter	2.2mm
DIN-Rail Mount Profile	custom

Electrical specifications
Min. supply voltage AC-IN	100V AC
Max. supply voltage AC-IN	240V AC
Typ. current consumption	0.1A
Max. current consumption	0.1A
Built-in fuse	1A
Serial interface level	3.3V
Max. relay switching current (resistive)	5A
Max. relay switching voltage	250VAC/30VDC
Max. relay switching power	1250VA/150W
Max. wire cross section relay terminals	1.5mm²
Max. wire cross section input terminals	1.5mm²
Max. wire cross section AC-IN	1.5mm²
Max. wire cross section W1	1mm²

Note: Experimental device

Header & connector description

Name	Description
DC-IN	Supply terminal
W1	1-Wire terminal
RESET	Button to trigger hard reset of the MCU
J1	Header for serial connection (flashing and configuring)
J2 (pre-boot)	Jumper to trigger flash mode at boot
J2 (at boot)	Erases current configuration and loads default configuration
J3	Chain IN header for stack operation
J4	Chain OUT header for stack operation