Operator`s manual
54  A-Class 
Printer Options (continued) 
Displayed Menu Item  Details 
GPIO PORT 
Used to interface the printer to external controlling devices (see 
Appendix D). 
GPIO DEVICE 
Sets the GPIO Port to work with a specific type of device. 
APPLICATOR 
Enables the GPIO for a label applicator. 
BARCODE VERIFIER 
Enables the GPIO for a bar code verifier. 
DISABLED 
Disables the GPIO Port. 
START OF PRINT 
Programmable signal input that controls the Start of Print (SOP) 
process.   
ACTIVE LOW 
SOP signal must go ‘low’ for at least 50 milliseconds to initiate 
printing. 
ACTIVE HIGH 
SOP signal must go ‘high’ for at least 50 milliseconds to initiate 
printing. 
END OF PRINT 
Programmable signal output that signifies the End of Print (EOP) 
process. 
ACTIVE LOW 
Outputs a logic ‘low’ following printing. 
ACTIVE HIGH 
Outputs a logic ‘high’ following printing. 
LOW PULSE 
Outputs a low pulse (approximately 30 milliseconds long) following 
printing. 
HIGH PULSE 
Outputs a high pulse (approximately 30 milliseconds long) 
following printing. 
RIBBON LOW 
Programmable signal output that signifies the RIBBON LOW 
DIAMETER condition; see Section 4.2.2. 
ACTIVE HIGH 
Outputs a logic ‘high’ when the ribbon reaches the Ribbon Low 
Diameter setting. 
ACTIVE LOW 
Outputs a logic ‘low’ when the ribbon reaches the Ribbon Low 
Diameter setting. 










