We are working on developing “cheap” RTD monitoring channels for the CMS Phase-2 requirements. The channels will provide the complete readout for 4-wire RTD sensors in the detector volume (~100 m distance). The values will be made available by an OPC server that can directly integrate them in the WinCC OA DCS environment of the detector. We are finished testing with the commercially available Analog Devices autonomous RTD readout circuits. Up to now our tests with the chip are very satisfactory. Studied all single chip functionalities and software. We are currently designing a 3U Eurocard format prototype PCB (comfortable mechanical, powering and connectivitythat is commonly used in our environment) that will house 4 such chips (24 RTD/card, 20 cards/crate=480RTD) and communicate to a controller. This will not be prototyped before Q4 2019. The software for the controller communication to the cards as well as the OPC Server functionality have to be programmed and tested.

96-pin VME-like connector for INPUTS PCB 96-pin VME-like connector for READOUT 96 pins, 4 pins/RTD = 24 RTD 6 RTD/chip 4 chips = 24 RTD √ SPI bus Chip Select lines

FPGA or CPU or BOTH (Xilinx Zinq) 96-pin VME-like connector for INPUTS 1 Crate: 1 controller 20 boards 480 RTD FPGA or CPU or BOTH (Xilinx Zinq) 96-pin VME-like connector for INPUTS 96-pin VME-like connector for INPUTS 96-pin VME-like connector for INPUTS 96-pin VME-like connector for INPUTS 96-pin VME-like connector for INPUTS 96-pin VME-like connector for INPUTS 96-pin VME-like connector for INPUTS 96-pin VME-like connector for INPUTS 96-pin VME-like connector for INPUTS 96-pin VME-like connector for INPUTS 96-pin VME-like connector for INPUTS 96-pin VME-like connector for INPUTS 96-pin VME-like connector for INPUTS 96-pin VME-like connector for INPUTS 96-pin VME-like connector for INPUTS 96-pin VME-like connector for INPUTS 96-pin VME-like connector for INPUTS 96-pin VME-like connector for INPUTS 96-pin VME-like connector for INPUTS 96-pin VME-like connector for INPUTS