Allied International GX3300C manual Gpo

These signals only function as outputs and can be configured as follows:

Exposing	Corresponds to when camera is
	integrating light.
Trigger Ready	Indicates when the camera will
	accept a trigger signal.
Trigger Input	A relay of the trigger input signal
	used to “ daisy chain” the trigger
	signal for multiple cameras.
Readout	Valid when camera is reading out
	data.
Strobe	Programmable pulse based on one
	of the above events.
Imaging	Valid when camera is exposing or
	reading out.
GPO	User programmable binary output.

Any of the above signals can be set for active high or active low.

RS-232 RXD and RS-232 TXD

These signals are RS-232 compatible. These signals allow communication from the host system via the Ethernet port to a peripheral device connected to the camera. These signals are not optically isolated and reference power ground. If these signals are used in the system, care must be taken to prevent ground loop problems.

USER GROUND

This connection provides the user ground reference and return path for the isolated sync in and sync out signals. This connection is necessary if any of the isolated sync signals are to be used. It is also recommended that this ground connection be physically close to the used sync signals to prevent parasitic coupling. For example, a good cable design would connect the required signal on one conductor of a twisted pair and the isolated ground on the second conductor of the same twisted pair.

USER VCC

This connection provides the power supply for the isolated sync out signals. The voltage requirement is from 5V to 24V DC. The current requirement for this supply is a function of the optical isolator collector current and the number of sync outs used in the system. See the SYNC OUTPUT section for more detail. To prevent parasitic coupling this connection should be physically close to the used SYNC OUT signals and USER GROUND.

GX3300 Technical Manual Page 14