[Introduction]:GXXAX00A0 distributed IO expansion module adopts an scalable design in structure and needs to be used with our M31 series distributed IO host.
| Symbol | name | Function/Description |
| DOI | DOI switch output | DOI switching output interface, used in conjunction with COMA |
| DO2 | DO2 switch output | DO2 switching output interface, used in conjunction with COMA |
| DO3 | DO3 switch output | DO3 switching output interface, used in conjunction with COMA |
| DO4 | DO4 switch output | DO4 switching output interface, used in conjunction with COMA |
| COMA | COM side of DO | DO1-DO4 share COMA for use together |
| DO5 | DO5 switch output | DO5 switching output interface, used in conjunction with COMB |
| DO6 | DO6 switch output | DO6 switching output interface, used in conjunction with COMB |
| DO7 | DO7 switch output | DO7 switching output interface, used in conjunction with COMB |
| DO8 | DO8 switch output | DO8 switching output interface, used in conjunction with COMB |
| COMB | COM side of DO | DO5-DO8 share COMB for use together |
| DO9 | DO9 switch output | DO9 switching output interface, used in conjunction with COMC |
| DO10 | DO10 switch output | DO10 switching output interface, used in conjunction with COMC |
| DO11 | DOH switch output | DO 11 switching output interface, used in conjunction with COMC |
| DO12 | DO12 switch output | DO12 switching output interface, used in conjunction with COMC |
| DO13 | DO13 switch output | DO13 switching output interface, used in conjunction with COMC |
| DO14 | DO14 switch output | DO 14 switching output interface, used in conjunction with COMC |
| DO15 | DO 15 switch output | DO 15 switching output interface, used in conjunction with COMC |
| DO16 | DO 16 switch output | DO16 switching output interface, used in conjunction with COMC |
| COMC | COM side of DO | DO9-DO16 share COMC for use together |