Table of Contents
Extension module EMO-R8
Unipi 1.1
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 in our e-shop. Instructions for use with SW Mervis can be found here on this link.
The module can be connected using the RJ11 connection cable included in the package.
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. Starting Unipi Base OS 12 and Mervis OS 2.6.5.10, you are now able to access the extension module by Modbus.
| A2 | A1 | A0 | HEX | DEC | MODBUS | Description | |||
|---|---|---|---|---|---|---|---|---|---|
| 0 | 0 | 0 | 20 | 32 | 0 | Address reserved for relay on Unipi 1.1 | |||
| 0 | 0 | 1 | 21 | 33 | 1 | Free address | |||
| 0 | 1 | 0 | 22 | 34 | 2 | Free address | |||
| 0 | 1 | 1 | 23 | 35 | 3 | Free address | |||
| 1 | 0 | 0 | 24 | 36 | 4 | Free address | |||
| 1 | 0 | 1 | 25 | 37 | 5 | Free address | |||
| 1 | 1 | 0 | 26 | 38 | 6 | Free address | |||
| 1 | 1 | 1 | 27 | 39 | 7 | Free address |
Modbus accessing on GNU/Linux systems
Does not apply for Mervis OS. To use the extension board on Modbus, you have to allow it first. Follow steps in file viewed by command cat /etc/unipi-id/README.md.