Datamax-O'Neil H-Class GPIO Option - Manual (Page 5)

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Step 1: Configuring the Hardware
Configure the card to meet your interfacing requirements by arranging hardware jumpers,
as described in the following procedure:
CAUTION
Always wear a wrist strap and follow standard ESD prevention measures
when handling the card.
A) Remove the card from the packaging and then place the card onto a static-free work
area.
B) Set the jumpers on the card (detailed below) to meet the requirements of your
application:
► GPI/O A (J1)
Four dedicated inputs control printer functions. 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.