©2006 Cypress Computer Systems,Inc. • www.cypressworld.com
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Activating an external relay with a digital output.
Use a relay with a 5 volt coil and requiring less than 25
mA drive current.
Digital Output
+ 5 Volts from Suprex
Using Auxiliary Inputs and Outputs: Digital Outputs
The Digital Outputs also operate at 0 and +5 Volts. They are capable of sinking 25 mA and
sourcing 0.5 mA. As digital signals, they can be interfaced directly to electronic equipment
utilizing 5 Volt logic level signals such as panels and gate controllers. Check the manufacturers
specifications for the equipment that you will interface to the Suprex to verify signal levels.
Other external devices such as magnetic or solid state relays can be used if more drive
capability is required.
K 1
Relay Contacts
Activating a Solid State Relay. Use a relay with a 5
volt input and requiring less than 25 mA drive current
such as the Opto 22 or Crydom products using a logic
level input.
See relay manufacturers documentation for electrical
and connection requirements.
Digital Output
+ 5 Volts from Suprex
K 1
Solid State Relay Contacts
K 1
