Datamax-O'Neil H-Class GPIO Option - Manual (Page 8)

6
► GPI/O B (J2)
Six unassigned inputs are designed to interface to open-collector outputs. These
inputs require no external pull-ups, while blocking diodes allow the use of totem pole
outputs from +4.5 VDC to + 26 VDC. Optical isolators provide galvanic isolation. Two
print control interface circuit examples are given below.
For direct inputs:
Use the printer’s +5VDC to supply the devices
interfacing to the GPI/O B inputs (as shown in
the sample circuit, right).
GPI/O B - J2
8
3
12
7
Input 1
Ground
13
Input 2
Input 3
Input 4
6
Input 5
Input 6 2
For isolated inputs:
To provide galvanic isolation for the GPI/O B
inputs, remove Jumper JMP 11 then supply an
external +5VDC source voltage to Pin 1, and
remove Jumper JMP 10 then supply an
external Ground to Pin 6 (as shown in the
sample circuit, right).
1 Vcc
+5 VDC External Source
GPI/O B - J2
8
3
12
7
Input 1 13
Input 2
Input 3
Input 4
Input 5
Input 6 2
Ground 6
Six unassigned outputs have slew-limited signal-edge rise and fall times to
prevent cross talk in the cabling. Optional 10K ohm pull-up resistors, one for each of
the output lines, can be used at either +5 or +24 VDC via Jumpers JMP 2 – 7.
 Note: If external pull-ups are employed (that is, when Jumpers JMP 2 - 7 are
not installed), ensure that the applied external voltage does not exceed
+30VDC.
The table below details the GPI/O B pin assignments, settings and functions.