Relay, Normally closed normally open common – Vivotek SD9161-H-v2 2MP PTZ Network Dome Camera User Manual
Page 10

VIVOTEK
User's Manual - 10
DI/DO Diagram
The DO pins are dry contacts: Common, Normally Closed, Normally Open.
The characteristics are as follows:
Normally Closed
Normally Open
Common
Relay
Open as normal status
Grounded as normal status
Web UI settings
Open
Grounded
DO Triggering condition
Normally open w/ Common
Normally closed w/ Common
Default Status
Note the following for the DO connection.