Manual for D18994

[George_Ghita]

Hello, i just bought one ModBus 4 relay module (D18994), but came without any manual, îs possible to find one? Thank you

[Bruce_Osborne]

This forum is specifically for openHAB, not a general Smart Home forum.

[George_Ghita]

Ok, i thought i can get some help,

Thank you anyway

lun., 28 dec. 2020, 18:06 Bruce Osborne via openHAB Community <bot@community.openhab.org> a scris:

[rossko57]

Notes on D18994 linked here

[Solved] ModBus and cheap 4 relay module (D18994)

Hello ! I have a cheap relays module with ModBus support integrated. I`ve tested it with my debug scripts and it works well. Here is my short manual about it: link (russian lang). Relays on this card could not be accessed as coils and another scheme used instead. For example if i need to enable relay number 2 i should write value 0x0200 to holding register 2, and i should write 0x0100 if it need to be changed back to open state. My question is: how to use such kind of control scheme as reular…

If you plan on using this with openHAB you would need to adapt the configuration for v2 of Modbus binding.

[SOLVED] How to config Modbus 8 relay board

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