Siemens 6AV3673-1CA11 Control Panel Interface

Siemens 6AV3673-1CA11 CPI1 Control Panel Interface links a Siemens OP37/TP27-10/37 operator panel to a SIMATIC PLC, delivering 16 digital inputs and 16 digital outputs (16xDI, 16xDO) to support bidirectional I/O between the operator interface and the control program. As CPI1 in Siemens' Control Panel Interface family, it acts as the I/O bridge and communication conduit for CP signals, enabling the panel’s switches and indicators to be read by the PLC while allowing the controller to drive panel actuators through the same interface. The 6AV3673-1CA11 variant is specifically specified for OP37/TP27-10/37 configurations that require 16 input lines and 16 output lines, making it suitable for mid‑scale HMI applications where local operator interaction must be reflected in real-time process control. Ideal for automation projects that combine a Siemens CP with a PLC, this CPI1 interface expands discrete I/O capability without altering the main PLC I/O architecture, supporting reliable handshaking and synchronized control between operator actions and system responses.