https://www.ximea.com/support/wiki/usb3/io_specification
xiQ Specification of digital Inputs / Outputs¶
General specification related to camera¶
| Parameter | Value | Note | 
| Pollution degree | Degree 1 | No pollution or only dry, non-conductive pollution occurs. The pollution has no influence. | 
| Limited power circuit | Yes, <30VDC | Inherently limited power sources, IEC 61131-2, Section 11.3, Table 45 | 
| Overvoltage category | Category II | Vpeak=500V | 
| Material group | all | Material group is not specified | 
| Micro-environment | yes | Voltages are known and controlled | 
| Protective coating on PWB | no | 
Digital Input Specification¶
Digital input complies with standard IEC 61131-2 
(Programmable controllers - Part 2: Equipment requirements and tests)
| Parameter | Value | Note | 
| Compliance | According IEC IEC 61131-2 | |
| Input levels according IEC 61131-2 | Type 1 | Device for sensing signals from mechanical contact switching devices, such as relay contacts, push-buttons, switches, etc. Converts an essentially two-state signal to a single-bit binary number | 
| Indication | No | No visual indicator | 
| Rated input voltage | 24V DC | |
| Common pole | yes, common pole with digital output | |
| Effect of incorrect input terminal connection | Reverse voltage polarity protected | |
| Isolation | yes, optical | |
| Isolation potential | 50V DC | between channel and other circuits (including ground) | 
| Effects when withdrawing/inserting input module under power | no damage, no lost data | |
| Maximal recommended cable length | 10m | |
| Number of inputs | 1 | 
Digital Output Specification¶
Digital output does not comply with standard IEC 61131-2, Table 9
(lower output current rating as required by standard)
| Parameter | Value | Note | 
| Compliance according IEC IEC 61131-2 | no | |
| Maximal open circuit voltage | 24V DC | |
| Isolation | yes, optical | |
| Output port type | Open collector NPN | |
| Protection | short-circuit / over-current | |
| Protection circuit | PTC Resettable Fuse | |
| Maximal sink current | 25mA | |
| Trip current | 50mA | Self-restarting when failure mode current disconnected | 
| Inductive loads | no | |
| Common pole | yes, common pole with digital input | |
| Indication | No | No visual indicator | 
| Number of outputs | 1 |