... ctronic modules Detectors unit . Bicounter module . ... The base of the electronics design is the same as in original MASS: modular structure, data exchange via RS485 interface, PMTs as light detectors. ... Detailed design of the MASS electronic modules (circuit diagrams, printed circuit b oard views, their sp ecifications) is provided in the second Chapter. ... SS MOSI 6 VCC GND LINE A OVLIGHT LINE B STROB 12 13 Figure 2.2: Circuit diagram of the analog part of the Bicounter module electronics. ...