Hardware layout and data connections of the AMICA control system. The A-PLC manages resistors, sensors, fans, and contactors (R, S, F, C) for the local environment control. A mutual heartbeat monitoring with the telescope PLC (I-PLC) is ensured by TTL lines. Auxiliary devices (vacuum pump, cryocooler, gauges, temperature controllers, cryomotors and multimeters-VP, CC, LC, CM, MM) are accessed by the LCU through serial/Ethernet MOXA converters. Clock and bias filters and video signal amplifiers (CF, BF, VS) are directly connected to the read-out electronics (SPC and DCS boards). This is linked (by the optical fiber) with the LCU in which a PMC board drives the M2 wobbling system through TTL lines. All the local control units and the Ethernet devices belong to the same LAN, extended by switches (Sw), and remotely connected to the base through cables and a redundant WiFi point-to-point link.
