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Cisco Smart+Connected I/O Extender Reference Guide
OL-27368-01
Connecting the Devices
Figure 7
Contact for Self-Powered Voltage Source Device
Connect to the Relay Port
The Cisco I/O Extender provides eight (8) relay ports.
For most applications, attach one (1) wire to the common terminal, and the other to the normally open
terminal. The Relay switches close when the Relay is activated. The Cisco I/O Extender can support
applications that require a normally closed Contact.
Figure 8
Relay Port, Normally Open