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GXGXX0800 distributed IO expansion module Supporting Standard Modbus Protocol Freely Configurable and Easily Expandable.
[Introduction]：The distributed IO expansion module adopts an expandable design in structure and needs to be used with our M31 series distributed IO host.
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| silk screen | name | illustrate |
| AI1+ | AI1 analog input+ | AI1 analog input + interface, used in conjunction with AI1- |
| AI1- | AI1 analog input- | AI1 analog input-interface, used with AI1+ |
| AI2+ | AI2 analog input+ | AI2 analog input + interface, used in conjunction with AI2- |
| AI2- | AI2 analog input - | AI2 analog input-interface, used with AI2+ |
| AI3+ | AI3 analog input+ | AI3 analog input + interface, used in conjunction with AI3- |
| AI3- | AI3 analog input- | AI3 analog input-interface, used with AI3+ |
| AI4+ | AI4 analog input+ | AI4 analog input + interface, used in conjunction with AI4- |
| AI4- | AI4 analog input- | AI4 analog input-interface, used with AI4+ |
| AI5+ | AI5 analog input+ | AI5 analog input + interface, used in conjunction with AI5- |
| AI5- | AI5 analog input- | AI5 analog input-interface, used with AI5+ |
| AI6+ | AI6 analog input+ | AI6 analog input + interface, used in conjunction with AI6- |
| AI6- | AI6 analog input- | AI6 analog input-interface, used with AI6+ |
| AI7+ | AI7 analog input+ | AI7 analog input + interface, used in conjunction with AI7- |
| AI7- | AI7 analog input- | AI7 analog input-interface, used with AI7+ |
| AI8+ | AI8 analog input+ | AI8 analog input + interface, used in conjunction with AI8- |
| AI8- | AI8 analog input- | AI8 analog input-interface, used with AI8+ |
| VO+ | hanging in the air | No effect, access is not allowed |
| VO+ | hanging in the air | No effect, access is not allowed |
| VO- | hanging in the air | No effect, access is not allowed |