Relay board CSC - 8IO - Manual of installation and use
Please read the following instructions carefully and respect them
❏When installing or servicing the unit, be sure to follow the instructions in this manual and take all
necessary precautions;
❏do not remove or deteriorate protections, labels, and markings, especially those required by law,
and replace them if they are no longer legible.
The laws, regulations, prescriptions, ordinances, directives in force for such devices have been
observed.
The materials used and the equipment parts, as well as the manufacturing, quality assurance and
control procedures meet the highest demands for safety and reliability.
Using them for the purposes specified in this owner's manual, operating them with due care and
performing thorough maintenance and overhaul in a workmanlike manner will help maintain the units'
continued performance and service life.
2. Installation
2.1 Mounting
The controller should be installed and stored in a dry location on a DIN rail. Do not install in humid,
corrosive, or dusty environments.
2.2 Power connection
The 8IO relay board is supplied with 24Vdc or 24Vac.
2.3 Bus connection
The device is equipped with an RS485 serial interface with Modbus RTU communication protocol.
Use a shielded single pair twisted pair cable that complies with EIA RS 485 standards. Belden 9841
cable is recommended.
Modbus connections must be input-output type. Avoid star connections.
Pay attention to correctly connect poles "A" and "B" of the communication cable, without ever inverting
the wiring of pole "A" and "B", make the connections as shown in the following figure:
Relay board CSC 8IO_EN_1.00
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Rossato Group Srl
