Instructions

111 C-Control Pro IDE

2.2.9 REL4-Board

The C-Control PRO AVR32Bit REL4 Board (Conrad Order No. 192631) is designed to expand the

functionality of the C-Control PRO AVR32Bit products. The product is configured as open circuit

board. The board is equipped with 4 relays for switching loads, and is intended only for C-Control

PRO products.

Connection and Commissioning

Make sure that before you connect the modules to your C-Control PRO AVR32Bit Applicationboard

or Mainboard, all connections to connected devices are separated and voltage free. On the C-Control

PRO systems there is a 6-pin header connector labeled UNIT-BUS. This pin header connector is

suitable for connecting the REL4 boards. At these pins, I2C, UART and +5 V are lead through. The

REL4 board has an I2C-BUS port expander, which is responsible for controlling the relay. Through

the I2C bus control no additional I/O pins of the UNIT are required.

UNIT-BUS Pin Configuration

The REL4-Board is connected via a 6-pin ribbon cable to the pin header connector (UNIT-BUS) and a

screw terminal labeled "VREL". Since the cable length to the UNIT BUS may vary according to the

application, we offer these components for self-assembly using the following order numbers:

Ribbon cable RM1.27 0.05mm²: Order No. 607237

Pin header connectors 2x3 RM:2.54mm: Order No. 742063

Matching connection cable pre-assembled (length 35cm) Order No. 198876

Tip: The pin header connectors can be easily pressed together with a small vise. Cut the cable

to proper length and straight it in the plug (guide grooves in the plug), and then clamp between the

two vise jaws, and turn it carefully until the connector clicks into place.

The REL4-Board-Board has two UNIT-BUS connections that are mutually connected 1:1. Thus, e.g.,

one of the connectors can be plugged to the Applicationboard or Mainboard, and the second port

can be used as a junction that connects to another UNIT-BUS module. The cable length must not