Gateway module and module arrangement

A gateway module, comprising:

• a module housing;
• an operating device arranged on the module housing, which operating device can be put, by user actuation, into a plurality of visually distinguishable operating device states;
• a first communication interface for communication with field level devices;
• a second communication interface for communication with an external server;
• and
• a control unit configured to receive field data from the field level devices via the first communication interface and to provide the field data to the external server via the second communication interface, wherein the control unit is further configured to provide, depending on which operating device state the operating device is in, a manipulation function that serves to change the operation of the gateway module and/or the field level devices by external access via the first and/or the second communication interface, wherein the control unit is configured to provide the manipulation function in a first operating state and is configured not to provide the manipulation function in a second operating device state different from the first operating device state, wherein the gateway module is in operation in both these operating device states.