Automation field device

A process automation field device, comprising:

• a field device housing;
• a field device electronics unit including at least one circuit board and disposed in the field device housing;
• a circuit board holder disposed in the field device housing and configured to hold the at least one circuit board,
• wherein the circuit board holder with a surrounding outer contour is fitted, at least in a subregion, to an inner contour of the field device housing such that the outer contour of the circuit board holder lies essentially flushly against the inner contour of the field device housing,
• wherein the circuit board holder includes, in the subregion, at least one engagement mechanism configured to secure the at least one circuit board,
• wherein the at least one circuit board includes a counter-engagement mechanism corresponding to an engagement mechanism of the least one engagement mechanism of the circuit board holder,
• wherein the corresponding engagement mechanism includes a recess in the subregion of the outer contour of the circuit board holder, and the counter-engagement mechanism of the at least one circuit board includes at least one engagement nose,
• wherein the recess and the at least one engagement nose are fitted to each other such that at least one engagement nose can engage in the recess,
• wherein the at least one circuit board is introduced in the circuit board holder, and the circuit board holder holds the at least one circuit board by engagement of the corresponding engagement and counter-engagement mechanisms,
• wherein the at least one circuit board is potted in the circuit board holder with a potting compound to a predetermined potting compound height, and
• wherein the corresponding engagement and counter-engagement mechanisms are configured in, or on, the circuit board holder and the at least one circuit board, respectively, such that the corresponding engagement and counter-engagement mechanisms lie above the potting compound height and thereby are not potted.