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Advanjet HV-2000C Jet Controller Setup and Operation
3A5856A
Appendix 4: Input/Output Connector
The HD26 I/O connector connects to one type of input circuit and four types of output
circuits.
The design notes suggest at least one interface circuit on the user’s side of
each type of input or output.
As a general rule, a good interface should provide level shifting and galvanic isolation
between the jet controller and the robot. Galvanic isolation enhances noise immunity
between the jet controller and the robot.
For true galvanic isolation when using opto-isolators, it is necessary to use two
independent power supplies, one on the input side, and one on the output side. If the
input-side ground is connected to the output-side ground, or if there is only one power
supply,
there is no ground isolation, and the ―opto-isolator‖ is reduced in functionality to
a simple level shifter.
Appendix 4-1:
HD26 Pin Assignments
A standard 5-foot I/O cable is supplied with the HV-2000C. The I/O is configured for the
inputs to be pulled down to GND. When the specific input is triggered, the Advanjet
controller will activate the corresponding preprogrammed Recipe # shown.
Pins 1 through 6 of the I/O cable are outputs from the robot to the Advanjet
controller. They can be TTL outputs capable of sinking 2 mA of current, or they
can also be relay contacts.
Pin 7 outputs a busy status flag from the Advanjet controller to the robot.
Pin 8 is an external interrupt used to remotely stop a dispensing program
Pins 9 and 14 are Isolated Ground
Pins 18-26 are alarms from the heater and pressure sensors.
The tables that follow describe the pin assignments of the standard 26-pin I/O connector;
the pin name, terminology and specifications; and the corresponding schematic diagram.
