| 摘要 |
An I/O module includes a base plate, universal-circuits, and an option-module. The base plate includes connection terminals. Field devices are electrically connectable to the connection terminals. The universal-circuits correspond to the connection terminals. The universal-circuits are provided on the base plate, and configured to perform an input or output of analog or discrete signals from or to the field device. The option-module is detachably provided in the base plate. The option-module is provided between a first connection terminal of the connection terminals and a first universal-circuit of the universal-circuits. The option-module includes a first circuit configured to performing transmitting and receiving of signals between the first connection terminal and the first universal-circuit. The first connection terminal corresponds to the first universal-circuit. |
