Paperless Recording System Paperless Recorder with built-in I/O 2, 4, 6, 8, 10 or 12-points universal input. Independent input type can be selectable for each channel. Paperless Recorder with Remote I/O 73VR1100 connects to a wide selection of M-System's remote I/O modules. Compact Paperless Recorder 1/4 DIN size (96 x 96 mm) panel mount compact recorder. Direct field inputs at the built-in terminals and optional remote inputs via Modbus RTU. R1M Series I/O Modules Flexible Modbus I/O modules for the Paperless Recording System. RZ Series Universal Input Modules 12-point Universal input module. DC, TC, RTD and potentiometer selectable independently per channel R2M Series I/O Modules 8-point DC and TC inputs; connected via RS-232C / Modbus RTU Remote I/O R3/R5 Series Free combination of I/O modules; Modbus interface