Canary MultiMux User Manual

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Page 1

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

75 Newport Road, Suite 211

New London, NH 03257 USA

e-mail: [email protected]

web: www.canarysystems.com

Canary Systems, Inc.

Voice: (603) 526-9800

Fax: (603) 526-9004

Page 2

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

Page 3

Section 1 - Introduction 3

223.8mm

273.05mm

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.

Manual Switch Header Sockets (optional)

Mounting Hole (4 places)

Interboard Connectors

Surge Arre stors (optional)

Screw Terminal Blocks (16 places)

Datalogger Connection

Earth Ground Connection (2 place s)

Canary Systems, Inc.

SA1

TB1

1H1

SA2

TB2

TB3

TB4

SA3

SG1

SA4

SA5

SA6

SG2

SA7

SA8

SA9

SG3

SA10

SA11

SA12

SG4

SHIELD

1L1 1H2 1L2 1H3 1L3

2H1 2L1 2H2 2L2 2H3 2L3

3H1 3L1 3H2 3L2 3H3 3L3

4H1 4L2 4H2 4L1 4H3 4L3

SA13

SA14

SA15

SA16

SA17

SA18

SA19

SA20

SA21

SA22

SA23

SA24

TB5

5H1 5L1 5H2 5L2 5H3 5L3

SG5

SHIELD

TB6

6H1 6L1 6H2 6L2 6H3 6L3

SG6

SHIELD

TB7

7H1 7L1 7H2 7L2 7H3 7L3

SG7

SHIELD

TB8

8H1 8L2 8H2 8L1 8H3 8L3

SG8

SHIELD

Datalogger Connection

TB17

1H 1L

2H 2L 3H 3L

16/32/48 CHANNEL TERMINAL BOARD

SA25

TB9

TB10

TB11

TB12

9H1

SA26

9L1 9H2

SA27

9L2 9H3 9L3

SG9

SHIELD

SA28

10H1

SA29

10L1 10H2

SA30

11L2 11H3 11L3

SG10

SHIELD

SA31

12H1

SA32

12L1 12H2

SA33

12L2 12H3 12L3

SG11

SHIELD

SA34

13H1

SA35

13L1 13H2

SA36

13L2 13H3 13L3

SG12

SHIELD

EN 12V G

CLK

SA37

SA38

SA39

SG13

SA40

SA41

SA42

SG14

SA43

SA44

SA45

SG15

SA46

SA47

SA48

SG16

TB13

TB14

TB15

TB16

13H1 13L1 13H2 13L2 13H3 13L3 SHIELD

14H1 14L1 14H2 14L2 14H3 14L3 SHIELD

15H1 15L1 15H2 15L2 15H3 15L3 SHIELD

16H1 16L1 16H2 16L2 16H3 16L3 SHIELD

10.750"

8.813"

Page 4

Section 1 - Introduction 4

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

Current

100%

90%

50%

10%

Surge Waveform

10ms

1000ms

Time

Page 5

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

Note: Timing values shown are minimum values.

250ns

50ms

Clock

Selected

1 2 15 16

Channel 1No Channel

Channel 2

Selected

Channel 15

SelectedSelected

Channel 16

Selected

No Channel

Selected

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.

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

See section 2.8 for more information on DaisyMux mode.

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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.

TB ML MUX TB

Connection

1H 1H

1L 1L

2H 2H

2L 2L

3H NC

3L NC

AG S

12V 12V

G GND

EN EN

CLK CLK

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 2 3 4 5 6 7 8 9

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

3L terminals are not connected.

Brown 1H

Red 1L

Orange 2H

Yellow 2L

Green AG

Blue 12V

Purple G

Grey EN White CLK Black Cable Shields

Description Bendix Mux Cable

(5 pair)

High side of CH1 A White Brown

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

High side of CH2 C Red Red

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

High side of CH3 White

Low side of CH3 White’s Black

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

Power F Yellow Yellow

Ground G Yellow’s Black Yellow’s Black

Enable H Green Green

Clock J Green’s Black Green’s Black

Cable Shield K Shield Wires from

White & Red Pair

plus Overall

Low side of CH1

High side of CH1

Low side of CH2

High side of CH2

Gage shield

Power

Ground

Enable

Clock

Cable Shield

Mux Cable

(6 pair)

Shield Wires from

Brown & Red Pair plus

Overall

Page 7

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)

32 Channel

48 Channel

Instrument #1

Temperature for Instrument #1

No Connection

SHIELD

1H1 1L1 1H2 1L2 1H3 1L3

1H1

1L1

1H2

1L2

1H3

1L3

Instrument #1 Instrument #2

No Connection

Instrument #1 Instrument #2 Instrument #3

TB1

SHIELD

TB1

1H1 1L1 1H2 1L2 1H3 1L3

Thermistor in VW Gage #1

VW Gage #1

No Connection

SHIELD

1H1 1L1 1H2 1L2 1H3 1L3

VW Gage #1 VW Gage #2

No Connection

VW Gage #1 VW Gage #2 VW Gage #3

TB1

SHIELD

TB1

1H1 1L1 1H2 1L2 1H3 1L3

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.

Page 8

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

Page 9

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

Page 10

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)

Page 11

Section 2 – MultiMux Operation and Installation 11

2.8 Enclosure Installation

The standard enclosure for the MultiMux is a Hoffman 12x10 fiberglass/polyester NEMA 4 type. The enclosure can be mounted to a wall or other surface by attaching the 4 supplied mounting tabs to the bottom of the enclosure using the supplied screws.

The placement of the mounting holes is depicted in the illustration below.

Mounting Hole

(4 places)

8.00"



(203 mm)

12.5"

(318 mm)

Earth Ground Lug

10.5" (267 mm)

12.94"

(329 mm)

2.9 Lightning Protection

If the MultiMux is equipped with the optional lightning protection components then care must be exercised in the installation to maximize their effectiveness. Specifically, an effective earth ground must be attached to the MultiMux terminal board.

If the MultiMux was ordered in an enclosure with the lightning protection components then there will be a ground lug on the side of the enclosure as shown in the illustration above. Attach a large gauge copper wire (6-12 AWG) from the lug to a suitable earth ground, either a copper stake driven into the earth or a known electrical system earth ground.

Copper earth ground stakes and connecting wire are available from Canary Systems.

Page 12

Section 2 – MultiMux Operation and Installation 12

2.10 DaisyMux Operation

DaisyMux is a special operation mode where all of the signals are shared between 2 or more multiplexers. The MultiMux supports up to 8 multiplexers used in a DaisyMux configuration and the switching mode is ALWAYS 16 Channel.

The advantage with the DaisyMux configuration is that a single cable may be used to connect a string of MultiMux multiplexers together, as shown in the diagram below.

There are 2 configuration issues to deploy the DaisyMux, the DIP switch settings of the MultiMux and the MultiLogger Software configuration.

MultiMux DIP Switch Settings

On the MultiMux are 3 switches in the DIP switch array, labeled A2, A1 and A0, that control the address of the multiplexer, this address ranges between 0 and 7 in binary values, or between 1 and 8 in terms of the multiplexer number. These determine which section of channels will be activated, i.e. the MultiMux configured with address 0 with be active for channels 1-16, the MultiMux with address 1 will be active for channels 17-33, etc.

The following table illustrates the range multiplexer numbers and corresponding DIP switch settings.

Mux# A2 – SW4 A1 – SW5 A0 – SW6

1 OFF OFF OFF 2 OFF OFF ON 3 OFF ON OFF 4 OFF ON ON 5 ON OFF OFF 6 ON OFF ON 7 ON ON OFF 8 ON ON ON

For example, the DIP switches for MultiMux #6 should be configured as shown:

NOTE: ONLY 16 channel mode is supported by the DaisyMux!

Page 13

Section 2 – MultiMux Operation and Installation 13

MultiLogger Software Configuration

Multiplexers are configured using the Program | Multiplexers form, as illustrated.

To configure DaisyMux operation you would simply specify an Enable port that matches all of the multiplexers in the series. For example, multiplexer #2 would be configured as shown below.

When MultiLogger builds the datalogger program it will note that the Enable setting is the same for the 2 (or more) multiplexers, it will not lower the Enable line, which would effectively reset the multiplexers, between the multiplexers.

NOTE: This functionality was supported beginning with version

2.1.1 of the MultiLogger Software. Prior to version 2.1.1 you were required to use the special ANE DaisyMux Model (as shown) to support the DaisyMux configuration. If your version of software is outdated it is recommended that you upgrade, contact Canary Systems or your software vendor to obtain the access information for software upgrades. Software upgrades are available through a support contract.

Page 14

Are the switched leads

wiring correct for the

Attach 12V and G

Are the Enable and

Attach Enable & Clock

wiring?

Adjust the wiring for the

Adjust the software

No No No

water or

Note: See the MultiSensor

Interface User's Guide or

User's Guide for wiring

Section 3 – Troubleshooting 14

3.1 Troubleshooting Flowchart

If you cannot obtain readings using the MultiMux or the readings are unstable then see the troubleshooting flowchart below for help in determining the nature of the problem.

Start

Does the MultiMux

advance through the

channels?

Yes

connected?

Yes

Is the

sensor leads?

Yes

Do the

software settings match

the sensor type and

Connect the leads

type of sensor used

MultiLogger Software

diagrams.

settings

Is 12V and G

connected to the

MultiMux?

Yes

Clock lines connected

to the control ports?

Yes

Do the software settings for the Enable and Clock lines match

the connections?

lines

Match software and digital

I/O connections

Yes

Is there a source of

electrical noise nearby?

Do the

circuit boards show

Call Canary Systems for

further assistance

other

contamination?

Yes

Remove the noise source

or move the MultiMux

Clean the circuit boards

Yes