Now that the MicroTCA.4 specification has been agreed and is shortly to be published, Schroff has developed two MicroTCA systems with RTMs that meet the current state of the specification. The first of these is realised as a cube (5 U, 42 HP) with, on the front, six AdvancedMC slots, one MCH slot and one slot for a plug-in 300 W PSU (without MicroTCA management) in double full-size format. On the rear are six RTM slots in double mid-size format. Forced ventilation of the front and rear slots is provided by speed-controlled fans. This cube system is designed for use in the laboratory, e.g. for developing boards.
The second MicroTCA system designed to the MTCA.4 specification is a 19" system (9 U, 84 HP) with twelve AdvancedMC slots, two MCH slots and four power slots on the front. The rear offers 12 RTM slots. This system is intended for field operations. The AdvancedMC slots are designed for double mid-size modules and the power slots are intended for MicroTCA power modules. Two redundant hot-swap fan units with EMMC in a push-pull configuration complete the system. These provide the forced ventilation of the front and rear slots. The fan speeds for front and rear are controlled separately and can be set via the MCH.