====== Extension module EMO-R8 ======
Unipi 1.1 can be expanded by up to 56 relays. For this purpose is used the I²C expansion module EMO-R8, which can be purchased [[https://www.unipi.technology/cs/8-relay-addon-emo-r8-p34|in our e-shop]].
Instructions for use with SW Mervis can be found [[en:sw:01-mervis:unipi11-with-emo-r8-hidden|here on this link]].

The module can be connected using the RJ11 connection cable included in the package.

{{ :en:hw:emo-r8.jpg?nolink |}}


===== Connectivity =====
  * 8× Finder 36.11.9.005.4011 switching relay (250 V~ / 10 A or 30 V⎓ / 10 A)
  * 2× I²C port - one serves as an input (from Unipi 1.1) and the other for connecting another EMO-R8 board or another I²C extension
  * 2.1 mm power jack (DC jack) - requires power supply of 5 V⎓ / 0,6 A
  * 3× jumper for setting the address according to the table

===== Addressing =====
Up to 7 different addresses can be set for this expansion module, so up to 7 of these modules can be connected to Unipi 1.1. The following table describes the position of the jumpers for setting the I²C address.

|< 100% 1% 5% 5% 5% 5% 10% 10% 7% 57% >|
^ ^  A2  ^  A1  ^  A0  ^ ^  HEX  ^  DEC  ^ ^ Popis  ^
||||||||||
| |  0  |  0  |  0  | |  20  |  32  | | Address reserved for relay on Unipi 1.1  |
| |  0  |  0  |  1  | |  21  |  33  | | Free address                             |
| |  0  |  1  |  0  | |  22  |  34  | | Free address                             |
| |  0  |  1  |  1  | |  23  |  35  | | Free address                             |
| |  1  |  0  |  0  | |  24  |  36  | | Free address                             |
| |  1  |  0  |  1  | |  25  |  37  | | Free address                             |
| |  1  |  1  |  0  | |  26  |  38  | | Free address                             |
| |  1  |  1  |  1  | |  27  |  39  | | Free address                             |