Datamax a-class mark ii Operator's Manual page 145

Failure to properly configure the GPIO Port can result in damage to the printer and / or connected devices.
Pin Signal
Signal Name
Number Direction
1
Ground
N/A
2 +5 VDC
3 SOP [2]
4 Slew Label
Input
Toggle /
5
Pause
6 Reprint
7 +24 VDC
N/A
8 Ground
9 Ribbon Low
Service
10
Required
11 End Of Print
12 Media Out
Output
13 Ribbon Out
14 Data Ready
15 Option Fault
[1] Signal directions are given relative to the printer.
[2] If active with no current print job, "WAITING FOR DATA" will be displayed. Specifying a quantity of 9999 while keeping this signal ON will cause non-stop label
printing, except in single label "Imaging Mode", which will cause the printer to stop between labels.
[3] For setting details, see PRINTER OPTIONS / GPIO PORT (Section 4.2.3).
A-Class
GPI/O Port A Overview
Jumper Position
[1]
Installed
JMP 8
Removed
Installed
JMP 9
Removed
N/A N/A
When inactive, outputs will be
pulled up to a voltage determined
by this jumper setting, where:

Pins 1 – 2 = +5VDC;

JMP 1
Pins 2 – 3 = +24VDC; or,

None = A common external
voltage (not to exceed +30VDC)
via external pull-ups (providing a
20K ohm feedback path through
any two outputs).
Function / Description
Printer chassis is used.
Ground must be supplied.
Printer +5VDC is used (.5 amp maximum)

Drawing more than .5 amps can result in unreliable printer operation.
+5VDC must be supplied.
Programmable [3]
Media is advanced until the signal goes HIGH and, if not in continuous mode, the
label is positioned at the next available TOF.
The printer pauses when the signal is taken LOW.
The last label is reprinted exactly, with no increment or time stamp changes;
recommended for use during error conditions. Keeping this signal LOW results in
non-stop printing.
Printer +24 VDC (1.5 amp maximum)
Printer chassis.
[1]
Programmable . Signifies a RIBBON LOW DIAMETER warning condition.
Evoked by occurrences listed under 'Fault Messages.'
Programmable [1] . Signifies the End of Print (EOP) process.
Evoked during an Out of Stock condition. Active LOW.
Evoked during an Out of Ribbon condition. Active LOW.
Evoked when a label is waiting to be printed. Then after the printer receives the
SOP signal, printing will begin. For synchronization with the print cycle, the End Of
Print signal indicates the completion of the print process. Active LOW.
Evoked during an RFID fault condition. Active LOW.
[1]
Active LOW.
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