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RST Flexi-Mux Instruction Manual

ELM0029B

RST Instruments Ltd.

Page 9

F

IGURE

5-3

A

CR6

CONNECTING A

F

LEXI

-M

UX AND AN

MPBX

5.3.2

4-Wire Serial Switching

Below is a configuration of a CR310 connected to a Vibrating Wire. CR310, CR300, and
CR1000X require AVW200 while a CR6 does not. See Appendix A-2 for sample
programs.

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Summary of Contents for RST Flexi-Mux

Page 1: ...contained in this document RST Instruments Ltd reserves the right to change the information at any time and assumes no liability for its accuracy Copyright 2021 RST Instruments Ltd All rights reserved...

Page 2: ...By A Initial Release 2012 Mar 23 TK TW B Removed all references to old Campbell loggers CR10X etc updated all schematics and photos added more schematic examples added an Appendix that includes CRBas...

Page 3: ...er Programming 13 6 SPECIFICATIONS 14 SAMPLE PROGRAMMING 15 A 1 2 Wire Serial Switching 15 A 2 4 Wire Serial Switching 16 A 3 4 Wire Switching with Separate Excitation 17 A 4 8 Wire Series Parallel Sw...

Page 4: ...each sensor An added feature of the RST Flexi Mux is that it contains internal transient protection on each individual line Unlike traditional multiplexers this negates the need for external transient...

Page 5: ...in transient protection on every line safeguards against damaging power surges which can be caused by occurrences such as nearby lightning The Flexi Mux requires only two datalogger control ports one...

Page 6: ...xcluding CR6 Vibrating Wire Interface up to 5 RST vibrating wire piezometers can be multiplexed Cascading each Flexi Mux permits a theoretically unlimited number of muxes to be chained together Thus m...

Page 7: ...it on any flat surface or base plate The finished length including the mounting tabs is 20 7cm 8 15 Mounting holes are 17 9cm 7 07 apart FIGURE 4 2 FLEXI MUX DIMENSION 4 3 CONNECTION DETAILS Connectio...

Page 8: ...d to accommodate a tie wrap to hold the lead wires The connectors are designed to be easily disconnected giving the flexibility to switch or move sensors Lead wires are attached using a standard screw...

Page 9: ...the Flexi Mux connects to an available 12V port and a Ground terminal for power One control port is used for Reset and another is used for Clock If two control ports are not available depending on the...

Page 10: ...st 1 ms long A delay typically 10 to 20 ms is inserted into the datalogger program between the beginning of the clock pulse and the measurement instruction to ensure sufficient settling time for the r...

Page 11: ...g the RST Flexi Mux in conjunction with Campbell Scientific CR6 dataloggers Please note that the following sections are simply meant as an overview of the many ways an RST Flexi Mux can be used Many c...

Page 12: ...Ltd Page 9 FIGURE 5 3 A CR6 CONNECTING A FLEXI MUX AND AN MPBX 5 3 2 4 Wire Serial Switching Below is a configuration of a CR310 connected to a Vibrating Wire CR310 CR300 and CR1000X require AVW200 w...

Page 13: ...ith Separate Excitation Below shows separate excitation of a string of In Place Inclinometers IPI and Vibrating Wire using two different sets of Mux configurations Note Figure 5 5 depicts configuratio...

Page 14: ...RST Flexi Mux Instruction Manual ELM0029B RST Instruments Ltd Page 11 FIGURE 5 5 FLEXI MUX WITH BIAXIAL IPIS AND VWP...

Page 15: ...RST Flexi Mux Instruction Manual ELM0029B RST Instruments Ltd Page 12 FIGURE 5 6 FLEXI MUX IPI27050 SERIES...

Page 16: ...Page 13 5 3 4 8 Wire Series Parallel Switching A basic parallel of two FlexiMUX s with VW connected to a CR6 FIGURE 5 7 FLEXI MUX WIRED IN PARALLEL TO SWITCH 8 WIRES 5 4 DATALOGGER PROGRAMMING For all...

Page 17: ...ctive Levels max 2 0V Clock Active Levels max 2 0V Min Clock Pulse Width 1 ms Max Actuation Relay Time 20 ms Relay Operation Break before make Initial Relay Resistance closed 0 1 Ohm Max Switching Cur...

Page 18: ...1 PTemp FP2 Sample nVW kPa IEEE4 Sample nVW Bunits IEEE4 Sample nThm VW_therm IEEE4 EndTable BeginProg Main Program Scan 1 Min 0 0 PanelTemp PTemp 60 Battery Batt_volt If TimeIntoInterval 0 30 Min The...

Page 19: ...Vdc Units kPa kPa Units Res Units Htz Hz VWP Table DataTable VWP_Table 1 1 Sample 1 Bat_V IEEE4 Sample 1 Int_Temp IEEE4 FieldNames Panel_Temp Sample nVW Bunits IEEE4 Sample nVW kPa IEEE4 Sample nVW VW...

Page 20: ...lClose Com1 PortSet SE2 0 CallTable VWP_Table EndIf NextScan EndProg A 3 4 WIRE SWITCHING WITH SEPARATE EXCITATION a IC7565B IC757B IC7560B IC7570 Series Refer to Figure 5 5 4 strings of IPI s to 1 MU...

Page 21: ...1 IEEE4 Sample max_ipi_nodes ipi_temperature 1 1 IEEE4 EndTable DataTable IPI_String2 True 1 Sample 5 ipi_A 2 1 IEEE4 Sample 5 ipi_B 2 1 IEEE4 Sample 5 ipi_temperature 2 1 IEEE4 EndTable DataTable IP...

Page 22: ...3 9 48230 ipi_sn 3 10 48229 ipi_sn 3 11 48228 ipi_sn 4 1 48256 ipi_sn 4 2 48255 ipi_sn 4 3 48248 ipi_sn 4 4 48247 ipi_sn 4 5 48246 ipi_sn 4 6 48245 Scan 1 Min 0 0 PanelTemp PTemp 60 Battery Batt_volt...

Page 23: ...w 400ms for sensor to send response to CR6 buffer SerialInRecord ComC3 serial_test_tr H0054 0 H0D0A n_bytes_tr 01 If serial_test_tr R Then exit TR send loop if sensor responds ExitFor EndIf tr_com_err...

Page 24: ...allTable IPI_String3 CallTable IPI_String4 EndIf If TimeIntoInterval 0 30 Min Then Enter loop every 30mins PortSet U2 1 Reset Delay 0 100 mSec For i 1 To 10 PulsePort U1 5000 Clock Delay 0 100 mSec Vi...

Page 25: ...Sample nVW Bunits IEEE4 Sample nVW VW_Temp IEEE4 EndTable Define data tables DataTable IPI_GEN4_table 1 1 Sample 1 Batt_volt FP2 Sample 1 PTemp FP2 Sample 15 ipi_data 1 1 1 IEEE4 Presents the sensor d...

Page 26: ...andard CDAB SerialOut ComC1 65534 TXO 0 CHR 13 1 0 Delay 0 1 Sec SerialFlush ComC1 Set Verify Modbus Addresses For i 1 To n_ipi up to the number of IPI sensors For j 1 To n_ipi Set device Modbus addre...

Page 27: ...nits VW_Temp i VW i 6 Temperature Next i PortSet U2 0 CallTable VWire SW12 1 1 Power IPI ON Delay 0 10 sec For i 1 To 5 For j 1 To 5 Read A Axis B Axis and Temp starting from 0x30 register ipi_data i...

Page 28: ...in Then Enter loop every 30mins PortSet C2 1 Reset Delay 0 500 mSec For i 1 To 10 PulsePort C1 5000 Clock Delay 0 100 mSec VibratingWire VW i 1 1 U3 1500 3500 1 0 05 60 A B C Htz i VW i 1 frequency Am...

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