02 Parts

PCB assembly

naked PCB board
6 plastic distance bolts 4mm for mounting the PCB

connector set
- display 2.4 inch ili9341. 2.2 inch also works. More details.
- keypad 4x4 matrix
- 5V power supply, preferably with 35mm DIN rail mounting
- recommended: USB adaptor for software updates, or configuration without keypad and display

Triac assembly

Triac
BTA41/800B
The part BTA40/800 is electrically the same, but has a casing with blade flat connectors, and is more expensive.
Or:
Q8040K5
If you want to look for other Triacs, consider these parameters:
Blocking Voltage V-DRM: minimum 800V
Current I-T: minimum 40 A
Critical rate of rise of on-state current di/dt: minimum 50 A/us, better 100 A/us
Isolated Tab
for phase angle triacs: AL800 inductivity
terminal strip
MOV metal oxide varistor 0,6W, 300VAC =JVR14N471K or similar
470 Ohm or 1k resistor
heat conductive paste Kerafol KP92 or similar
4mm screw
4mm washer spring, lock washer
MCB miniature circuit breaker
heat sink

SSR assembly

SSR e.g. carlo gavazzi RA 4850-D12 with 5V DC control voltage input
MOV metal oxide varistor
heat conductive paste
5mm screws
5mm washer spring, lock washer
MCB

Housing

metal casing https://www.klibo.de/gehaeuse_metall.html or https://www.schaltschrank-xpress.de or ebay
heat sinks
optional: fans for forced cooling ventilated heat sink, e.g. Sunon FAN-ML 8025-230 :: Lüfter 80x80x25mm / 230V
DIN rails 35mm
2 stage mains filter e.g. Schaffner FN-2090
3 MOVs: S20K275 430 V 12kA 280J Epcos or similar
5 Terminal blocks: Neutral Line1 Line2 Line3 PE
optional: aluminum housing for the PCB

Relay Module

If you pick a 4 channel one with the following pin assignment, then wiring is easier. You can connect 2 modules in total, that is 8 relays in total.

The hydrocontrol relay connector comes directly from the microcontroller, so all protection elements like diodes and power transistor/optocoupler need to be present on the relay module.

The module inputs should not pull more than 2mA, because this current has to be delivered directly from the MCU. The above module pulls 1.8mA per input.

You can find the module in the hydrocontrol shop, on ebay etc.

If you intend to switch the mains to the user loads:

Even thought the relays are rated at 10A, which would be 2.3kW at 230V, the contacts may stick after a while, if trying to switch off at the maximum current. For long-lasting safe operation, is recommended to use a separate, stronger mains contactor, which will be controlled by the relay module.

Cabling

1.5 mm2 for Currents up to 16A
2.5 mm2 for currents up to 32 A
4 mm2 for currents up to 40 A
10 mm2 for currents up to 70 A
flat ribbon cable 16 strands/conductors 2.54mm spacing

2nd power supply

P-mosfet IRF5305 or similar

Ethernet

W5500 module 2x5pin. This module is based on the http://www.wiznet.io/product-item/w5500/ chip.
P-Mosfet IRF5305 or similar, for powering the module off/on at startup.

For easy wiring, choose a module with the below pin layout. These modules are available at ebay, aliexpress, dealxtreme, dx, amazon etc. I won't provide a link here, because these change frequently. Do a search for "w5500" or "w5500 module" or "w5500 ethernet module"

Click images to enlarge.

GSM

adafruit fona
antenna
power and connector adaptor PCB

WLAN

ESP-07s module
antenna

dump load fault check /current measurement

current transformer
load resistor
terminal plug

Technical specifications: the AD input of the PCB can handle 2.56V max.

Choose your transformer and parallel load resistor, so that the PEAK voltage (not RMS) at maximum electrical current does not exceed 2.5V.

Temperature monitoring

NTC resistor 10kOhm
R 4.7 kOhm
2 component glue, epoxy or polymer, fast curing 5 - 7 min
terminal strip

Sources

Since I live in Germany, for me the german suppliers are the cheapest.

I first go to reichelt.de, then to conrad.de. They also ship international.

heat sinks, high current SSRs and contactors at tme.eu

display, keypad, relay modules, ethernet module, WLAN at ebay, aliexpress, dealxtreme, dx

current transformers, single terminal block at csd electronics or bürklin (obsolete: eibmarkt.de or eibtron.de)

international suppliers:

farnell, digikey, mouser, RS electronics

UK suppliers:

maplin, rapid electronics

Parts checklist for shopping

libre office calc sheet

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