Canary MultiMux Manuale utente

MultiMux

Multiplexer

USER’S GUIDE

Disclaimer: The following document is provided to assist users with the installation, operation

and training in the use of our products. This document and our products are intended to be used

by technically qualified personnel. Contained herein is information that is proprietary to Canary

Systems and may not be reproduced or copied in any form, nor disclosed to outside parties by

any means whether directly or indirectly, without the written consent of Canary Systems. This

document is subject to change without notice and Canary Systems assumes no responsibility for

errors, omissions or misinterpretation. Furthermore Canary Systems makes no warranty as to the

suitability of this information and/or products for any given application or use.

Multimux_usersguide.doc Revision D, 07-07

Canary Systems, Inc.

75 Newport Road, Suite 211

New London, NH 03257 USA

Voice: (603) 526-9800

Fax: (603) 526-9004

e-mail: support@canarysystems.com

web: www.canarysystems.com

Table of Contents

Section 1 Introduction

1.1 Overview........................................................................................ 3

1.2 Specifications................................................................................. 4

Section 2 MultiMux Operation and Installation

2.1 Operation Details........................................................................... 5

2.2 Datalogger Connection .................................................................. 6

2.3 Instrument Connection................................................................... 7

2.4 MultiLogger Software Configuration............................................... 7

2.5 CR10/CR10X Program Example.................................................... 8

2.6 CR1000 Program Example ............................................................ 9

2.7 CR1000 Program Example with VWDSP....................................... 9

2.8 Enclosure Installation..................................................................... 11

2.9 Lightning Protection....................................................................... 11

2.10 DaisyMux Operation..................................................................... 12

Section 3 Troubleshooting

3.1 Troubleshooting Flowchart............................................................. 14

Section 1 - Introduction 3

1.1 Overview

The MultiMux expands the number of instruments that may be read by the CR10 or CR10X in increments

of 16, 32 or 48, depending on the model purchased and the type of sensor being read. In addition the

MultiMux provides integral lightning protection by utilizing plasma surge arrestors (optional). The MultiMux

may be purchased installed in a NEMA 4X fiberglass/polyester enclosure or as a board assembly for

users supplying their own packaging.

The complete list of features and ordering options is detailed on the MultiMux Ordering Guide available

from our web site or by contacting Canary Systems directly.

The MultiMux consists of two printed circuit boards (PCB’s), one for making the instrument connections

(the terminal board) and the second, installed on the back of the terminal board (the switch board), for

switching the instrument leads. The MultiMux utilizes advanced high-reliability components such as

terminal blocks from Phoenix Contact (http://www.phoenixcontact.com), relays from Aromat

corporation (http://www.aromat.com) and a microcontroller from Microchip Devices

(http://www.microchip.com) to help insure years of reliable and trouble-free operation. The use of low

contact resistance relays means almost universal instrument support, a high degree of lightning

protection and virtually infinite channel isolation.

Warranty is applicable for 2 years from date of shipment. Warranty does not cover failure by misuse or by

nature including lightning, flood, or other catastrophe. Should you encounter problems with your MultiMux

see the troubleshooting flowchart in section 3.

A top view and description of the MultiMux terminal board is shown below.

1H2

1L2

2H3

2L3

3H3

3L3

4H3

4L3

SHIELD

12V

16/32/48 CHANNEL TERMINAL BOARD

1H1

1L1

2H1

2L1

3H1

3L1

4H1

4L1

SHIELD

CLK

1H3

1L3

2H2

2L2

SHIELD

3H2

3L2

4H2

4L2

SHIELD

5H2

5L2

6H3

6L3

7H3

7L3

8H3

8L3

SHIELD

5H1

5L1

6H1

6L1

7H1

7L1

8H1

8L1

SHIELD

5H3

5L3

6H2

6L2

SHIELD

7H2

7L2

8H2

8L2

SHIELD

13H2

13L2

12H3

12L3

11H3

11L3

9H3

9L3

SHIELD

13H1

13L1

12H1

12L1

10H1

10L1

9H1

9L1

SHIELD

13H3

13L3

12H2

12L2

SHIELD

10H2

11L2

9H2

9L2

SHIELD

16H2

16L2

15H3

15L3

14H3

14L3

13H3

13L3

SHIELD

16H1

16L1

15H1

15L1

14H1

14L1

13H1

13L1

SHIELD

16H3

16L3

15H2

15L2

SHIELD

14H2

14L2

13H2

13L2

SHIELD

TB1

TB2

TB3

TB4

TB5

TB6

TB7

TB8

TB9

TB10

TB11

TB12

TB13

TB14

TB15

TB16

Canary Systems, Inc.

SA37

SA38

SA39

SG13

SA40

SA41

SA42

SG14

SA43

SA44

SA45

SG15

SA46

SA47

SA48

SG16

SA1

SA2

SA3

SG1

SA4

SA5

SA6

SG2

SA7

SA8

SA9

SG3

SA10

SA11

SA12

SG4

SA13

SA14

SA15

SG5

SA16

SA17

SA18

SG6

SA19

SA20

SA21

SG7

SA22

SA23

SA24

SG8

SA25

SA26

SA27

SG9

SA28

SA29

SA30

SG10

SA31

SA32

SA33

SG11

SA34

SA35

SA36

SG12

DataloggerConnection

TB17

Manual Switch Header Sockets (optional)

Interboard Connectors

Screw Terminal Blocks (16 places)

Surge Arrestors (optional)

Datalogger Connection

Earth Ground Connection (2 places)

Mounting Hole (4 places)

8.813"

223.8mm

10.750"

273.05mm

Section 1 - Introduction 4

Time

Current

10%

90%

100%

10ms

1000ms

50%

Surge Waveform

1.2 Specifications

General

Power requirements: 9-16 VDC (unregulated)

Quiescent current: 100 µA

Channel activated current (2 or 4-wire): 40 mA

Channel activated current (6-wire): 50 mA

Control line input impedance: 10 kilohms

Control line input levels: TTL or CMOS (5V logic)

Transient protection: 18 VDC, 1500W Transzorbs

Operating temperature: -40 to +70°C (-40 to +160°F)

Relays

Power: 11 mA @ 12VDC (140 mW)

Contact type: Gold-clad silver alloy

Electrostatic capacitance: 3 picofarads

On resistance: 50 milliohms

Coil resistance: 1,028 ohms

Maximum switching voltage: 125 VAC, 110 VDC

Maximum switching power: 30 W (resistive load)

Maximum switching current: 1 A

Operate time: ~2 milliseconds

Release time: ~1 milliseconds

Initial contact bounce: ~1 millisecond

Surge withstand (between open contacts): 1,500 V

Switching life (mechanical): 100,000,000 operations

Lightning Protection Components (optional)

Tripolar Plasma Surge Arrestor (SA1-SA48)

Nominal DC breakdown voltage: 250 V

Surge life: 400 (10/1000 ms pulse @ 500 Amps)

Maximum surge current: 10 kA per side (8/20 µs pulse)

Insulation resistance: 10,000 Megohms

Bipolar Plasma Surge Arrestor (SG1-16)

Nominal DC breakdown voltage: 230 V

Surge life: 1,000 (10/1000 µs pulse @ 500 Amps)

Maximum surge current: 20 kA (8/20 µs pulse)

Insulation resistance: 10,000 Megohms

Section 2 –MultiMux Operation and Installation 5

2.1 Operation Details

The MultiMux is controlled by the CR10 or CR10X Controller using 2 digital control signals. The operation

of the MultiMux is simple enough so that virtually any device capable of controlling 2 digital TTL/CMOS

type signals can be used to control the multiplexer. Generally speaking the timing diagram depicted below

describes how the 2 digital signals are used to control the MultiMux.

Enable

Clock

Channel 1No Channel

Selected No Channel

Selected

Channel 15

SelectedSelected Channel 2

Selected

1 2 15 16

Channel 16

Selected

Note: Timing values shown are minimum values.

50ms

250ns

In the case of the 32 or 48 channel modes the maximum number of pulses to advance through all the

channels would be 32 and 48, respectively.

The channel switching mode is selected by configuring the DIP switch mounted on the MultiMux relay

board (mounted under the terminal board). The table shown below describes the 4 possible

configurations.

DIP Settings Mode Description

16 Channel Standard mode for switching 4 or 6-wire instruments (default).

32 Channel Switching 32 2-wire instruments.

48 Channel Switching 48 2-wire instruments (optional).

DaisyMux Mode where control signals are common to more than 1 multiplexer.

See section 2.8 for more information on DaisyMux mode.

The factory default setting is 16 Channel mode (unless specified otherwise).

Section 2 –MultiMux Operation and Installation 6

2.2 Datalogger Connection

The MultiMux is connected to the CR10/CR10X Controller or MultiLogger Mux Terminal Board (or ML

MUX TB) using the screw terminals on the terminal board.

The screw terminal block located on the bottom of the terminal board has the

following connections:

The table below lists the connections for the screw terminal block.

If using the MultiSensor Interface with your CR10 or CR10X then connect from the 10-pin connector

(using the supplied cable) on the Interface to the screw terminals of the MultiMux in the following order:

Pin Color Connection Description

1 Brown 1H Low side of CH1

2 Red 1L High side of CH1

3 Orange 2H Low side of CH2

4 Yellow 2L High side of CH2

5 Green AG Gage shield

6 Blue 12V Power

7 Purple G Ground

8 Grey EN Enable

9 White CLK Clock

10 Black Cable Shields Cable Shield

The MultiSensor Interface does not support the 6-wire switching capability of the MultiMux so the 3H and

3L terminals are not connected.

TB ML MUX TB

Connection Description Bendix Mux Cable

(5 pair) Mux Cable

(6 pair)

1H 1H High side of CH1 A White Brown

1L 1L Low side of CH1 B White’s Black Brown’s Black

2H 2H High side of CH2 C Red Red

2L 2L Low side of CH2 D Red’s Black Red’s Black

3H NC High side of CH3 White

3L NC Low side of CH3 White’s Black

AG S Gage shield E Blue & Blue’s Black Blue & Blue’s Black

12V 12V Power F Yellow Yellow

G GND Ground G Yellow’s Black Yellow’s Black

EN EN Enable H Green Green

CLK CLK Clock J Green’s Black Green’s Black

S Cable Shield K Shield Wires from

White & Red Pair

plus Overall

Shield Wires from

Brown & Red Pair plus

Overall

Section 2 –MultiMux Operation and Installation 7

2.3 Instrument Connection

The way instruments are connected to the MultiMux will vary slightly depending on the Mode selection

(section 2.1).

The following table illustrates typical connection techniques for each of the operating modes.

Mode Description Example

16 Channel

(4-wire)

1H2

1L2

SHIELD

1H1

1L1

1H3

1L3

TB1

Instrument #1

Temperature for Instrument #1

No Connection

1H2

1L2

SHIELD

1H1

1L1

1H3

1L3

TB1

VW Gage #1

Thermistor in VW Gage #1

No Connection

32 Channel

1H2

1L2

SHIELD

1H1

1L1

1H3

1L3

TB1

Instrument #1

Instrument #2

No Connection

1H2

1L2

SHIELD

1H1

1L1

1H3

1L3

TB1

VW Gage #1

VW Gage #2

No Connection

48 Channel

1H2

1L2

SHIELD

1H1

1L1

1H3

1L3

TB1

Instrument #1

Instrument #2

Instrument #3

1H2

1L2

SHIELD

1H1

1L1

1H3

1L3

TB1

VW Gage #1

VW Gage #2

VW Gage #3

DaisyMux Same as 16 Channel Mode Same as 16 Channel Mode

If the CR10 or CR10X is not equipped with the MultiSensor Interface see Appendix D of the MultiLogger

Software User’s Guide for sensor wiring diagrams. If the CR10 or CR10X is equipped with the

MultiSensor Interface then see the MultiSensor Interface User’s Guide for additional sensor wiring

diagrams.

2.4 MultiLogger Software Configuration

To configure MultiLogger to use the MultiMux

select CAN MultiMux as your multiplexer Model

on the Configure | Multiplexers form. Before the

individual channels may be edited you must select

a Gage Type, if the MultiSensor Interface is being

used then select MultiSensor, as shown in the

illustration at right, otherwise the type of gage

connected. Select either 16 Channels (default), 32

Channels or 48 Channels to match the DIP switch

settings of the MultiMux. The Enable and Clock

port settings are generally ignored when

MultiSensor is selected as the Gage Type, with

the exception of using the Enable setting to

determine DaisyMux configuration. See section 2.9

for more information on DaisyMux operation.

If the VWDSP Interface is being used (without the

MultiSensor Interface) be sure to select the

VWDSP Gage Type, as shown.

Section 2 –MultiMux Operation and Installation 8

2.5 CR10/CR10X Program Example

The following example illustrates how to write custom programs for the CR10/CR10X to read instruments

connected to the MultiMux. The example assumes a 16 Channel Mode MultiMux reading 16 vibrating wire

gages and their respective thermistors.

The program example illustrates how measurements of instruments connected to the MultiMux are read,

it does not include instructions that would store the measurements for later retrieval. Consult the CR10

Operators Manual for more information on storing measurements.

1: Set Port(s) (P20) ;Configure the control ports of the CR10/CR10X, C1=Enable, C8=Clock

1: 7999 C8..C5 = output/nc/nc/nc

2: 9994 C4..C1 = nc/nc/nc/10ms

2: Do (P86) ;Enable the MultiMux

1: 41 Set Port 1 High

3: Excitation with Delay (P22) ;50ms delay after enabling the MultiMux

1: 1 Ex Channel

2: 0 Delay W/Ex (units = 0.01 sec)

3: 5 Delay After Ex (units = 0.01 sec)

4: 0 mV Excitation

4: Beginning of Loop (P87)

1: 0 Delay

2: 16 Loop Count ;Total number of instruments

5: Do (P86) ;Advance the channel

1: 78 Pulse Port 8

6: Vibrating Wire (SE) (P28) ;Read the Vibrating Wire Gage

1: 1 Reps

2: 1 SE Channel

3: 1 Excite all reps w/Exchan 1

4: 20 Starting Freq. (units = 100 Hz)

5: 35 End Freq. (units = 100 Hz)

6: 250 No. of Cycles

7: 0 Rep Delay (units = 0.01 sec)

8: 1 -- Loc [ VWGage_1 ]

9: 1000 Mult

10: 0 Offset

7: Excite-Delay (SE) (P4) ;Read the Thermistor

1: 1 Reps

2: 5 2500 mV Slow Range

3: 2 SE Channel

4: 1 Excite all reps w/Exchan 1

5: 5 Delay (units 0.01 sec)

6: 2500 mV Excitation

7: 17 -- Loc [ VWTemp_1 ]

8: .001 Mult

9: 0 Offset

8: Polynomial (P55) ;Convert thermistor voltage to °C

1: 1 Reps

2: 17 -- X Loc [ VWTemp_1 ]

3: 17 -- F(X) Loc [ VWTemp_1 ]

4: -104.78 C0

5: 378.11 C1

6: -611.59 C2

7: 544.27 C3

8: -240.91 C4

9: 43.089 C5

9: End (P95) ;End of measurement loop

Section 2 –MultiMux Operation and Installation 9

2.6 CR1000 Program Example

'Enable our multiplexer

PortSet (1,1)

'Wait 100mSec for multiplexer to power up

Delay(0,100,MSEC)

'Cycle through 16 channels

For Channel = 1 TO 16

'Set Clock port high to advance mux channel

PortSet(8,1)

'Wait 10mSec for 50% duty cycle

Delay(0,10,MSEC)

'Set Clock port low

PortSet(8,0)

'Wait 10mSec for channel to settle

Delay(0,10,MSEC)

'Read our vibrating wire gage

VibratingWire(MuxChannel(),1,mV7_5,2,VX1,600,3600,500,-1,20000,500,0,1,0)

'Read our YSI44005 type thermistor

BrHalf(ScratchLoc(1),1,mV2500,2,VX1,1,2500,0,1000,250,2.5,0.0)

ScratchLoc(2) = ScratchLoc(1) / 5000

ScratchLoc(3) = (2.5 - (ScratchLoc(2)*1000) - ScratchLoc(1))/ScratchLoc(2)

MuxChannelTemp() = 1/(.0014051 + (.0002369*Log(ScratchLoc(3))) +

(.0000001019*(Log(ScratchLoc(3))^3))) - 273.2

'End of measurement loop

'Disable our multiplexer

PortSet (1,0)

2.7 CR1000 Program Example with VWDSP

See our Application Note #11 for more information on using the VWDSP Interface. This can be found in

the Support area of our website at www.canarysystems.com

The VWDSP can also originate clocking pulses using it’s own port –the example below uses C8 of the

control module to provide clocking pulses.

'Enable our VWDSP

PortSet (7,1)

'Wait 125mSec for VWDSP to power up

Delay(0,125,MSEC)

'Open our serial port for VWDSP Communication

SerialOpen (8,1200,0,1000,255)

'Enable multiplexer

SerialOut (8,"M1"+CHR(13),"",0,0)

'Wait 125mSec for multiplexer to power up

Delay(0,125,MSEC)

'Cycle through 16 channels

For Channel = 1 TO 16

'Set Clock port high to advance mux channel

PortSet(8,1)

'Wait 10mSec for 50% duty cycle

Delay(0,10,MSEC)

'Set Clock port low

PortSet(8,0)

'Wait 10mSec for channel to settle

Delay(0,10,MSEC)

'Read our vibrating wire gage using VWDSP

'Short delay

Delay (0,100,mSec)

'Send P configuration command

Section 2 –MultiMux Operation and Installation 10

SerialOut (Com3,"P0400 3500 0600 0040 0300"+CHR(13),"",0,0)

'Short delay

Delay (0,200,mSec)

'Clear buffer

SerialFlush(Com3)

'Send VA measurement command

SerialOut (Com3,"VA"+CHR(13),"",0,0)

'Configure serial input for receiving response

SerialIn(sInBuf,Com3,1500,-1,30)

'Check if enough characters received

if Len(sInBuf) >= 30 then

'Process response

Splitstr(ScratchLoc(),sInBuf," ",4,0)

'Convert to digits

ScratchLoc(5) = 1/((((ScratchLoc(3) * 65536) +

ScratchLoc(4))/ScratchLoc(2)) * 0.1356)

ScratchLoc(5) = (ScratchLoc(5) * 1000000)^2

ScratchLoc(5) = ScratchLoc(5) * 0.001

MuxChannel() = ScratchLoc(5) * 0.001

Else

'No VA command response

MuxChannel() = -99.999

EndIf

'Read our YSI44005 type thermistor using VWDSP

'Short delay

Delay(0,50,mSec)

'Clear Buffer

SerialFlush(Com3)

'Send TA measurement command

SerialOut (Com3,"TA"+CHR(13),"",0,0)

'Receive response

SerialIn(sInBuf,Com3,100,-1,18)

'Check if enough characters received

if Len(sInBuf) > 16 then

'Process response

Splitstr(ScratchLoc(),sInBuf," ",2,0)

'Convert to degrees C (>= VWDSP FW version 8) using Steinhart-hart

ScratchLoc(3) = ((ScratchLoc(1) * 65536) + ScratchLoc(2)) / 100

ScratchLoc(4) = ((ScratchLoc(3)/1023)*2.5)

ScratchLoc(5) = ScratchLoc(4) / 6040

ScratchLoc(6) = ScratchLoc(5) * 499

ScratchLoc(7) = (2.5 - ScratchLoc(4) - ScratchLoc(6)) / ScratchLoc(5)

'Finish conversion

MuxChannelTemp() = 1/(.0014051 + (.0002369*Log(ScratchLoc(7))) +

(.0000001019*(Log(ScratchLoc(7))^3))) - 273.2

'Check for error conditions

if MuxChannelTemp() > 100 then MuxChannelTemp() = -99.8

else

'No response from VWDSP

MuxChannelTemp() = -99.9

endif

'End of measurement loop

'Disable VWDSP

PortSet (7,0)

'Close our serial port for VWDSP communication

SerialClose (8)

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