User manual

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2. Intended use
The relay board contains eight relays with changeover contact. These serve to switch electric
circuits.
Item no. 197720: Relay load 24V/AC, 7A or 24V/DC, 7A
Item no. 197730: Relay load 230V/AC, 16A or 24V/DC, 16A
The relay board is addressed via a serial RS232 interface, preferably by a computer with
Windows operating system. The board is connected via a 9-pole null modem cable.
Up to 255 relay boards can be cascaded/connected in series.
The circuit board is intended for installation in a housing.
To be able to operate the relay board via USB, you need the RS232 USB converter (Conrad
order number 197257).
Any use other than that described above is not permitted. Besides possible damage to the
device, this is associated with risks like e.g. short circuit or electric shock. The safety notices
as well as the maximum admissible operating and peripheral conditions stated in the technical
data must be observed under all circumstances!
The entire product may not be modified or reassembled. Operation is only permissible in dry
indoor locations.
Observe all safety notices in these operating instructions!
3. Contents
• Relay circuit board
• CD with control software incl. source code
• Operating instructions