Basler ace acA1920-155, User Manual, Page: 75 / 326

AW00123404000 Physical Interface
Basler ace USB 3.0 65
5.9.2 Operation as an Input
This section describes the electrical operation of a GPIO line when the line has been set to operate
as an input.
5.9.2.1 Electrical Characteristics
The following I/O supply voltage requirements apply to a direct-coupled GPIO line when the line is
set as an input.
Your application must be able to accept 2 mA (sink current) from the direct-coupled GPIO input line
without exc0.8 VDC, the upper limit of the low status. The current draw for high-level input
current is < 100 µA.
Figure 38 shows the applicable electrical circuit when a GPIO line is set to operate as an input. The
figure is drawn to specifically apply to pin 1 (Line 3) as an example. However, with the necessary
modifications, the figure applies equally to pin 3 (Line 4).
The figure shows, as an example, the use of a TTL or CMOS logic gate in the external circuit. A
different example for an external circuit is shown in Figure 39.
NOTICE
Voltage outside of the safe operating voltage range can cause damage.
You must supply power within the safe operating voltage range.
Voltage Significance
+30.0 VDC Absolute maximum. The absolute maximum must never be exceeded. Otherwise, the
camera can be damaged and the warranty becomes void.
+0 to + 5.0 VDC Safe operating input voltage range (the minimum external pull up voltage is 3.3 VDC as
illustrated in Figure 39).
+0 to +0.8 VDC The voltage indicates a logical 0 (inverter disabled).
"voltage level low" of Section 5.13 on page 90 .
> +0.8 to +2.0 VDC Region where the transition threshold occurs; the logical status is not defined in this
region.
> +2.0 VDC The voltage indicates a logical 1 (inverter disabled).
"voltage level high" of Section 5.13 on
page 90 .
Table 13: Voltage Requirements for a Direct-coupled GPIO Line Set as an Input