Adam Equipment WSK 8 User Manual page 32

Connections to the relay drivers:
Connections are made to the PCB, Connector P1. The connector is a spring
activated type, simply press on the top of the connector and insert the wire.
Do not exceed the safe limits of voltage or current of 24VDC or 15ma per
output.
Depending upon the application it may be necessary to use a small relay to
drive larger relays, or to provide additional protection to prevent
electromagnetic interference (diodes as shown above) to this or other
machinery.
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