The invention relates to a clamping module for securing to a support rail, which has a housing, a bracing device and at least one retaining claw arranged thereon. The at least one retaining claw can be brought into a securing position on the support rail and clamped there by means of the bracing device, in order to detachably secure the clamping module to the support rail. According to the invention, the clamping module has a signal device, comprising at least one signal element arranged in the housing, which signal element can be moved along a predetermined movement path by placing the clamping module onto a support rail. Using the position of the signal element on the movement path, it can be identified from outside the housing whether the clamping module is correctly arranged on the support rail.