Table of Contents
1 Introduction..................................................................................................................................... 5
2 Pico RMU I/O...................................................................................................................................6
2.1 Field I/O..................................................................................................................................................... 6
2.2 Communica ions........................................................................................................................................ 7
2.3 Inpu Power................................................................................................................................................ 7
2.4 Digi al Inpu s.............................................................................................................................................. 7
2.4.1 Digi al Inpu Circui Overview.........................................................................................................................................................7
2.4.2 Digi al Inpu Func ional Represen a ion.........................................................................................................................................7
2.4.3 Digi al Inpu Field Wiring Example..................................................................................................................................................8
2.5 Digi al Ou pu s........................................................................................................................................... 9
2.5.1 Digi al Ou pu Circui Overview.......................................................................................................................................................9
2.5.2 Digi al Ou pu Func ional Represen a ion.......................................................................................................................................9
2.5.3 Digi al Ou pu Field Wiring Example.............................................................................................................................................10
2.6 Pulse Inpu s............................................................................................................................................. 11
2.7 4-20mA High Accuracy 24bi Analog Inpu s............................................................................................. 12
2.7.1 Analog Inpu Block Diagram.........................................................................................................................................................12
2.7.2 Analog Inpu Field Wiring.............................................................................................................................................................13
3 Pico RMU in RTU Mode................................................................................................................14
3.1 RTU Mode Connec ion Pinou Drawing...................................................................................................14
4 Pico RMU in PIU Mode..................................................................................................................15
4.1 PIU Mode Connec ion Pinou Drawing....................................................................................................15
4.2 Digi al Inpu Assignmen .......................................................................................................................... 16
4.3 Digi al Ou pu Assignmen ....................................................................................................................... 17
5 TorqueWrench.............................................................................................................................. 18
5.1 PicoRMU Info Page Informa ion.............................................................................................................. 19
5.1.1 Pulse Inpu s..................................................................................................................................................................................19
5.1.2 Device Informa ion........................................................................................................................................................................19
5.1.3 Digi al Inpu s.................................................................................................................................................................................19
5.1.4 Digi al Ou pu s..............................................................................................................................................................................20
5.1.5 Analog Inpu s................................................................................................................................................................................20
5.1.6 Pressure Correc ion......................................................................................................................................................................20
5.2 PicoRMU Config Page Informa ion.......................................................................................................... 21
5.2.1 Digi al Inpu Inversion...................................................................................................................................................................21
5.2.2 Digi al Ou pu Inversion................................................................................................................................................................21
5.2.3 RS422/485 Config........................................................................................................................................................................22
5.2.4 Fwd/Rev Timeou (secs) – PIU Mode Only..................................................................................................................................22
5.2.5 Modbus Slave Address.................................................................................................................................................................22
5.2.6 Densi ome er Pressure Compensa ion........................................................................................................................................22
5.3 PicoRMU Info Page in PIU Mode............................................................................................................. 23
5.4 Wiring he Isola ed RS422 Conver er...................................................................................................... 24
6 Modbus.......................................................................................................................................... 25
6.1 Modbus Slave Map.................................................................................................................................. 25
6.2 Newflow Modbus Mas er Simula or......................................................................................................... 28
7 Mechanical Dimensions...............................................................................................................29
8 Specifications............................................................................................................................... 30
8.1 Mechanical............................................................................................................................................... 30
8.1.1 DIN Rail Moun ed.........................................................................................................................................................................30
8.1.2 Po ed Uni ....................................................................................................................................................................................30
8.2 Environmen al.......................................................................................................................................... 30
8.3 Power Supply........................................................................................................................................... 30
8.4 Digi al S a us Inpu s................................................................................................................................. 31
8.5 Digi al S a us Ou pu s.............................................................................................................................. 31
8.6 Me er Pulse Inpu s & Period Measuremen .............................................................................................31
8.7 Analog Inpu s........................................................................................................................................... 31
Page 4 of 31 Pico RMU User Manual PicoRMU-UM-R4
