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Thermal Jet
Appendix B: Theory of Operation
5780-329 Operations Manual Rev J
Page 34
Marksman HHI
Functional Description
The Marksman HHI Ink Jet System prints text, autocodes (such as product counts or time
and date stamps), bar codes, and/or graphics onto products as they travel by conveyor
past stationary print heads. Print can be on any one of, or a combination of, the product's
sides. Print speed is controller by a conveyor mounted encoder or a built-in fixed speed
encoder. Products are detected using a photosensor. A graphical user interface with color
LDC, touch screen, and 70-key QWERTY keypad provides for easy and intuitive system
operation.
Power
The Marksman HHI draws its power through either one of its serial port connectors, either
from the print head directly attached to the port, or in applications where the optional
accessory hub is used, from the hub. Alternately theMarksman HHI may be powered by an
optional 15VDC desktop power supply plugged into its power jack. Marksman HHI/Thermal
Jet system cabling requirements differ depending on the power option used; see cabling
diagrams below.
Battery Backup
- A 3V battery on the CPU Board maintains the contents of system SRAM
and keeps the real time clock running during power outages or when the Marksman HHI is
not plugged into a power source.
Please note that power is applied to the Marksman HHI even when it is "turned off." When
turned off using the OFF button on the keyboard, the Marksman HHI enters a sleep mode
where it responds to nothing but the ON button. All voltages are present while sleeping.
The only way to completely remove power is to unplug the unit.
Marksman HHI Power Option
Cabling Diagrams
Single Task:
The Marksman HHI control-
ler draws its power from the daisy chain,
and the COM1 port is connected to the
last head in the chain.