Norscan Instruments 4200 Manuale utente

4200 ACU

USER MANUAL

Document Number:

D00801R01 Issue:

99059

4200 Alarm Circuit Unit

(ACU)

4200 ACU

USER MANUAL

Document Number:

D00801R01 Issue:

03/2011 Page: i

TABLE OF CONTENTS

1. INTRODUCTION..............................................................................................................................................1

1.1 STANDARD FEATURES.................................................................................................................................1

1.2 SPECIFICATIONS ..........................................................................................................................................1

2. THEORY OF OPERATION.............................................................................................................................2

2.1 BASIC MONITORING SYSTEM CONCEPTS.......................................................................................................2

2.2 NORSCAN CABLE MANAGEMENT SYSTEMS.................................................................................................2

2.3 ACU MONITORING (USING STU TERMINATION SENSORS).........................................................................2

2.4 ACU MONITORING (USING TSU TERMINATION SENSORS).........................................................................5

2.5 SPLICE SENSOR UNIT (SSU) OPERATION.....................................................................................................8

2.6 BATTERY FAIL SENSOR (BFS) OPERATION .................................................................................................8

2.7 MULTIPLEXED REMOTE SENSOR (MRS) OPERATION ................................................................................10

3. INSTALLATION.............................................................................................................................................12

3.1 ALARM CIRCUIT UNIT (ACU) CARD..........................................................................................................13

3.2 INSTALLATION AT THE CENTRAL OFFICE ..................................................................................................13

3.3 CONNECTING TO TERMINAL BLOCK (NORTH AMERICAN VERSION) ..........................................................15

3.4 CONNECTING TO TERMINAL BLOCK (UK AND EUROPEAN VERSION).........................................................16

3.5 INSTALLATION AT CABLE VAULT OR CABLE ENTRY LOCATION................................................................17

3.6 INSTALLATION AT SPLICE ENCLOSURE......................................................................................................19

3.7 INSTALLATION AT A TERMINATION ...........................................................................................................19

3.8 BATTERY FAIL SENSOR INSTALLATION:....................................................................................................21

3.9 MULTIPLEXED REMOTE SENSOR INSTALLATION:......................................................................................21

4. CONFIGURING THE ALARM CIRCUIT UNIT CARD...........................................................................22

4.1 LINE SELECTION AND CONFIGURATION.....................................................................................................22

4.2 OUTSIDE PLANT (OSP) LINE CONFIGURATION..........................................................................................22

4.3 ACU ~MONITORING CONFIGURATION .....................................................................................................24

5. ACU MONITORING/OPERATION OVERVIEW......................................................................................27

5.1 MONITORING OPERATION .........................................................................................................................27

6. APPENDIX A – SENSOR CONFIGURATION ...........................................................................................30

CONTACT INFORMATION ..................................................................................................................................36

4200 ACU

USER MANUAL

Document Number:

D00801R01 Issue:

03/2011 Page: ii

List of Figures:

Figure 1: Monitoring with Sequenced Termination Units (STU)......................................................3

Figure 2: STU Theory of Operation Diagram....................................................................................3

Figure 3: Cable Alarm - STU Network Schematic .............................................................................4

Figure 4: STU Initialization/Status Test Sequence............................................................................4

Figure 5: Line Alarm - STU Network Schematic................................................................................ 5

Figure 6: Monitoring with Termination Sensor Units (TSU) ............................................................6

Figure 7: TSU Theory of Operation Diagram....................................................................................6

Figure 8: Cable Alarm - TSU Network Schematic .............................................................................7

Figure 9: Line Alarm - TSU Network Schematic................................................................................ 7

Figure 10: Basic SSU Operation......................................................................................................... 8

Figure 11: BFS Installation Diagram....................................................................................................9

Figure 12: MRS Install Diagram .........................................................................................................11

Figure 13: Typical Cable/Sensor Monitoring Installation................................................................... 12

Figure 14: 4200 CMS Slot Designation...............................................................................................14

Figure 15: Transmitter Protection Assembly at Cable Vault (Building Entry)..............................18

Figure 16: Installation at Splice Enclosure...................................................................................... 19

Figure 17: Termination Protection Assembly at Building Entry..................................................... 20

Figure 18: Termination Installation in Splice Enclosure.................................................................21

Figure 19: MRS Connections...............................................................................................................21

Figure 20:4200 CMS Main Menu ........................................................................................................22

Figure 21: Line Control Menu for OSP Line.......................................................................................23

Figure 22: Configure Line Menu .........................................................................................................23

Figure 23: Add Services Menu.............................................................................................................23

Figure 24: Configure Line Menu with armor monitoring.................................................................... 24

Figure 25: Armor configuration...........................................................................................................24

Figure 26: Sensor and Set Line Type chart..........................................................................................25

Figure 27: Select a Baud Rate Menu ...................................................................................................25

Figure 28: Line Control Menu for OSP Line.......................................................................................27

Figure 29: STU List..............................................................................................................................28

Figure 30: STU Test Results Table ......................................................................................................29

Figure 31: Line Control Menu.............................................................................................................31

Figure 32: Configure Line Menu .........................................................................................................31

Figure 33: Armor Configuration Menu................................................................................................31

Figure 34: Sensor Configuration Menu...............................................................................................32

Figure 35: Select Sensor Type Menu....................................................................................................32

Figure 36: Sensor Code Menu .............................................................................................................32

Figure 37: Sensor Update Screen ........................................................................................................32

Figure 38: Sensor Configuration Screen .............................................................................................33

Figure 39: Sensor Configuration menu................................................................................................34

Figure 40: Select Sensor Type..............................................................................................................34

Figure 41: Armor configuration...........................................................................................................34

Figure 42: Update Sensor - MRS.........................................................................................................35

Figure 43: Sensor Configuration - MRS..............................................................................................35

Figure 44: Senor Configuration – MRS Inputs....................................................................................35

4200 ACU

USER MANUAL

Document Number:

D00801R01 Issue:

03/2011 Page: 1 of 36

1. Introduction

The 4200 Alarm Circuit Unit (ACU) plug-in card for the 4200 Cable Management System

provides armor, copper pair or tracewire monitoring to an outside plant cable network along

with sensor monitoring of splice enclosure, remote cabinet and building locations. The ACU

can monitor up to 78 miles or 125 kilometers of cable armor/copper conductor and 799

sensor devices. The ACU employs Digital Signal Processing (DSP) circuitry that allows for

adjustable filtering and for future enhancements to measurement and operation capabilities.

Operating over a metallic conductor, such as a cable armor (fiber optic cable), copper pair or

tracewire, the system will detect and warn the user of any damage to the protective cable

jacket ensuring an adequate preparation time for repair. Providing proactive protection, the

system cathodically protects the damage site, which inhibits corrosion of the metallic

conductor, until a repair can be carried out.

1.1 Standard Features

•Alarm thresholds fully adjustable via serial port, modem or telnet connection

•Digitally coded Sensor Units monitor splice enclosures for moisture ingression,

remote cabinets/buildings for environmental and equipment failure

•Cathodically protects the metallic conductor to prevent corrosion

1.2 Specifications

Alarm Circuit Unit (ACU)

Input Voltage -36 to-60 V dc

Output Voltage -48.0 ±0.5 V dc

Voltage Resolution 10 mV dc

Voltage Accuracy ±100 mV dc

Output Current ±25 mA dc

Current Resolution ±5.0 μA dc

Current Accuracy ±10 μA dc

Max. Monitoring Distance 125/78 km/miles

Maximum # of Branch Terminations 20 on STU network, 5 on TSU network

Max. Induced AC Voltage 16 V rms

Sensor Baud Rates 3, 10, 32 baud

4200 ACU

USER MANUAL

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D00801R01 Issue:

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2. Theory of Operation

2.1 Basic monitoring system concepts

When cable infrastructures (which include interconnected splice enclosures, remote

cabinet/building equipment) are exposed to the natural elements they can deteriorate,

become damaged or stop functioning over time. Unfortunately, this is not the only cause

of cable infrastructure damage. Accidental cable dig ups, vandalism and vehicle

collisions with aerial installation structures also account for cable damage. One way to

minimize the down time and reduce costly emergency repairs is to install a cable

monitoring system.

Cable monitoring is accomplished by using some or all of the following:

•Metallic cable shield(s) or armor

•Copper pair conductor

•Tracewire conductor

•Splice enclosure sensors and moisture detection tape

•Termination sensors

•Battery Fail Sensors (remote cabinet/building)

•Multiplexed Remote Sensors (remote cabinet/building)

2.2 Norscan Cable Management Systems

The 4200 ACU card is capable of providing cable, splice enclosure, end to end continuity

and remote cabinet/building monitoring when installed in the 4200 CMS chassis. The

ACU card will monitor the metallic conductor for faults to ground, end to end

connectivity and sensor activation activity to give indication of the condition of the cable

network infrastructure. Very specific sensor types (SSU, STU, TSU, BFS and MRS) are

placed throughout the cable network to monitor for wet splices, termination point testing,

remote cabinet/building battery, fans, heaters and power supplies devices just to name a

few. The ACU card deciphers the codes that are transmitted from the activated sensors,

which are then relayed to the 4200 CMS cable management and alarm reporting

processes.

2.3 ACU Monitoring (Using STU Termination Sensors)

The 4200 ACU card can be configured for monitoring a cable network using a Sequence

Termination Sensor (STU). Using STUs allows for a cable network to have up to 20

monitored branches. The cable network system would be composed of lengths of cable

joined at splice points that have Splice Sensor Units (SSU) installed and branches that are

4200 ACU

USER MANUAL

Document Number:

D00801R01 Issue:

03/2011 Page: 3 of 36

terminated by STU sensors. This section will describe how Cable, Line and Sensor

alarms are determined once the above-mentioned devices are installed (Figure 1).

4200CMS

4200 CMS Terminal

STU

01 02 03 20 21 22

41 42 43

31 32 33

Splice/Security Sensors

Figure 1: Monitoring with Sequenced Termination Units (STU)

The ACU card in the 4200 CMS is connected to the conductive metallic conductor and

applies -48 V dc to the cable network system. The cable metallic conductors are

connected together at the splice enclosures. Uniquely addressed Splice Sensor Units

(SSUs) are connected in parallel between the metallic conductor (across Tip and Ring in

copper pair applications) and ground at each splice enclosures to detect water ingression.

The SSUs are electrically invisible until triggered by moisture that enters the enclosure.

A STU sensor is a switch that simulates an open circuit resulting in a nominal line current

of 0.00 mA in a system with no faults to ground and terminates the cable metallic

conductor (Figure 2).

SSU SSU SSU Nominal

Loop

Current

0.00 mA

4200CMS

4200 CMS Terminal

STU

Open

Termination

- 48 V dc applied to Cable Armor

Figure 2: STU Theory of Operation Diagram

When the polyethylene sheath becomes damaged (exposing the metallic conductor) the

line current will start to increase depending on the size of the fault. This is referred to as

4200 ACU

USER MANUAL

Document Number:

D00801R01 Issue:

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fault loop current. If the fault loop current exceeds a preset threshold, a Cable Alarm

condition will appear on the 4200 CMS (Figure 3).

ntfaultcurre

fault IV

R48

Fault

Current Fault

Resistance

Termination

(STU)

C.O.

GND C.O.

GND

Detection Line Fault

Location

_48 Vdc

Figure 3: Cable Alarm - STU Network Schematic

When installing a new metallic conductor cable network system or connecting additional

branches to existing cable networks using STU sensors, a linear resistance measurement

has to be recorded. This measurement is for comparison purposes to determine conductor

continuity from the office equipment to each termination. A line initialization test must

be performed on each ACU card to determine the nominal line resistance value for each

STU sensor that is connected to the ACU card via the cable metallic conductor. This test

applies a reverse polarity current to the cable network system, which causes each STU

sensor to turn on sequentially (highest to lowest coded STU). Once activated, the highest

number coded STU will first transmit its preprogrammed sensor code, which is decoded

by the ACU card and then initiate the High Current Line Resistance test. It takes

approximately three minutes for each STU sensor to complete the Initialization Test

cycle. Once completed the nominal line resistance value is then recorded for each branch

in the cable network system on the associated ACU card (Figure 4).

TestCycle

STU Code High Current Line

ResistanceTest

Programmed

Delay Period

Line Polarity

Reversed

Standby

Figure 4: STU Initialization/Status Test Sequence

4200 ACU

USER MANUAL

Document Number:

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To check for sensor code decoding and end-to-end line continuity testing, the ACU card

can be programmed to run a STU Status resistance test (daily or weekly) on a periodic

basis. The test sequence is identical to what is shown on Figure 4. The test verifies that

each STU sensor code can be received, thus verifying end-to-end continuity and making

it safe to assume that the SSU codes can be decoded. The test also compares the recorded

nominal resistance value of the Initialization Test to the measured resistance during a

STU Status test. Changes in linear line resistance (metallic conductor continuity from the

office equipment to each termination) are typically caused by a loose or corroded series

bonds at splice points or by a break in the metallic conductor (detection line) as shown in

Figure 5. If the measured line resistance value in the STU Status test exceeds the preset

line resistance threshold above the nominal record resistance value, then a Line Alarm

condition will appear on the 4200 CMS. Note: Normal monitoring operation is resumed

after the STU Status test is completed.

48 Vdc Reversed

Loop

Current = 0 mA

Termination

(STU)

C.O.

GND C.O.

GND

Detection Line Open Fault

Location

Closed

for Test

Figure 5: Line Alarm - STU Network Schematic

2.4 ACU Monitoring (Using TSU Termination Sensors)

The 4200 CMS uses an ACU card that can be configured for monitoring a cable network

using a Termination Sensor Unit (TSU) and Branch Termination Sensors (BTS). The

cable network system would be composed of lengths of cable joined by splices using

Splice Sensor Units (SSU) with the main cable line terminated by one TSU sensor. In

addition, branch termination is accomplished by the use of up to four Branch Termination

Sensors (BTS) in conjunction with a TSU sensor. This section will describe how Cable,

Line and Sensor alarms are determined (Figure 6).

4200 ACU

USER MANUAL

Document Number:

D00801R01 Issue:

03/2011 Page: 6 of 36

4200CMS

4200 CMS Terminal

BTS

TSU

BTS

01 02 03 20 21 22

41 42 43

31 32 33

Splice/Security Sensors

Figure 6: Monitoring with Termination Sensor Units (TSU)

The ACU card in the 4200 CMS is connected to the conductive metallic conductor and

applies –48 V dc to the cable armor network system. The cables and metallic conductors

are connected together at the splice enclosures. Uniquely addressed Splice Sensor Units

(SSUs) are also connected in parallel between the metallic conductor (across Tip and

Ring in a copper pair cable network) and ground at the splice enclosure to monitor for

ingression of water. The SSUs are electrically invisible until triggered moisture that

enters the enclosure. The metallic cable conductor is terminated by a TSU sensor and up

to four additional BTS sensors.

The TSU sensor has a built in resistive load of 100kΩthat establishes a controlled

current loop for the cable network system. BTS sensors have the same resistive load and

must be taken into account when calculating controlled loop current. By applying the

following Ohm’s law formula we can arrive at the Inom current which would be 0.48 mA

for a TSU network with one termination (Figure 7).

Inom 48.0

100

48 =

SSU SSU

4200CMS

4200 CMS Terminal Termination

TSU

100K

Termination

Loop

Current

SSU

- 48 V dc applied to Cable Armor

Figure 7: TSU Theory of Operation Diagram

Indice

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