Omron ZFX-C User Manual page 10

5.Optional Lighting Connector
When the optional lighting is not connected, be sure to attach the connector cap. Otherwise, its protective
structure might be impaired.
6.Camera's Connector Cap
When using only one camera, attach the connector cap to cameras that are not in use.
7.Communication with a Host Device
Before communicating with a host device, make sure that the product has started up.
Also, clear the receive buffers on the device in use or perform other measures since undetermined signals
might be output from the host interface when this product is started up.
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ZFX-C User's Manual