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Then toggle (switches between off and on) the first relay, pause to see the result and then toggle
it again with the following code:
pfr.relays[0].toggle()
time.sleep(2)
pfr.relays[0].toggle()
Save your program by pressing Ctrl-X then Y. Now run your program in the Terminal window to
see LED0 flash and hear Relay0 click by typing the following:
python3 relayonoff.py
Warnings
● PiFace™ Relay+ and PiFace™ EXTRA boards are not intended for use in critical
systems.
● Do not expose to water, moisture or extremes of temperature (below -40°C or above
70°C).
● Take care whilst handling to avoid mechanical and electrical damage to the device and
connectors.
● Take suitable precautions to minimise risk of causing damage by electrostatic discharge.
● Connection to unapproved devices may affect compliance or result in damage to unit and
invalidate any warranty.
● Connections to PiFace™ Relay+, including connecting external circuits and PiFace™
EXTRA boards, should only be made with the power supply disconnected.
● Ensure that PiFace™ Relay+ and PiFace™ EXTRA boards are powered by a suitably
rated power supply that complies with the relevant regulations and standards applicable
to the country of intended use.
Compliance information
● This PiFace™ board complies with the relevant provision of the RoHS Directive for the
European Union. In common with all Electronic and Electrical Equipment this PiFace™
board should not be disposed of in household waste. Alternative arrangements may apply
in other jurisdictions.
● PiFace™ Relay+ board is CE marked. It is a class B product. The EMC emission test was
performed with a PiFace™ Relay+ connected to a Raspberry Pi® Model B+. Due to the
nature of the board, as a prototyping and rapid development board, fast transient
immunity tests and conducted radio-frequency immunity tests have not been executed.
ESD handling precautions should be observed. The board may be considered a
component if integrated into another product. Any person designing or developing a
product that uses one or more PiFace™ Relay+ boards is responsible for ensuring that it
is compliant and any modification to a PiFace™ board or inter-connection of other
elements and devices with a board does not change compliance.
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