Xtrails VESDA VLI User manual

VESDA VLI
Product Guide
June 2012
Document: 18500_A2
Part Number: 29674

VESDA by Xtralis VESDA VLI Product Guide
www.xtralis.com i
Intellectual Property and Copyright
This document includes registered and unregistered trademarks. All trademarks displayed are the trademarks of
their respective owners. Your use of this document does not constitute or create a licence or any other right to use
the name and/or trademark and/or label.
This document is subject to copyright owned by Xtralis AG (“Xtralis”). You agree not to copy, communicate to the
public, adapt, distribute, transfer, sell, modify or publish any contents of this document without the express prior
written consent of Xtralis.
Disclaimer
The contents of this document is provided on an “as is” basis. No representation or warranty (either express or
implied) is made as to the completeness, accuracy or reliability of the contents of this document. The manufacturer
reserves the right to change designs or specifications without obligation and without further notice. Except as
otherwise provided, all warranties, express or implied, including without limitation any implied warranties of
merchantability and fitness for a particular purpose are expressly excluded.
General Warning
This product must only be installed, configured and used strictly in accordance with the General Terms and
Conditions, User Manual and product documents available from Xtralis. All proper health and safety precautions
must be taken during the installation, commissioning and maintenance of the product. The system should not be
connected to a power source until all the components have been installed. Proper safety precautions must be taken
during tests and maintenance of the products when these are still connected to the power source. Failure to do so
or tampering with the electronics inside the products can result in an electric shock causing injury or death and may
cause equipment damage. Xtralis is not responsible and cannot be held accountable for any liability that may arise
due to improper use of the equipment and/or failure to take proper precautions. Only persons trained through an
Xtralis accredited training course can install, test and maintain the system.
Liability
You agree to install, configure and use the products strictly in accordance with the User Manual and product
documents available from Xtralis.
Xtralis is not liable to you or any other person for incidental, indirect, or consequential loss, expense or damages of
any kind including without limitation, loss of business, loss of profits or loss of data arising out of your use of the
products. Without limiting this general disclaimer the following specific warnings and disclaimers also apply:
Fitness for Purpose
You agree that you have been provided with a reasonable opportunity to appraise the products and have made
your own independent assessment of the fitness or suitability of the products for your purpose. You acknowledge
that you have not relied on any oral or written information, representation or advice given by or on behalf of Xtralis
or its representatives.
Total Liability
To the fullest extent permitted by law that any limitation or exclusion cannot apply, the total liability of Xtralis in
relation to the products is limited to:
i. in the case of services, the cost of having the services supplied again; or
ii. in the case of goods, the lowest cost of replacing the goods, acquiring equivalent goods or having the goods
repaired.
Indemnification
You agree to fully indemnify and hold Xtralis harmless for any claim, cost, demand or damage (including legal costs
on a full indemnity basis) incurred or which may be incurred arising from your use of the products.
Miscellaneous
If any provision outlined above is found to be invalid or unenforceable by a court of law, such invalidity or
unenforceability will not affect the remainder which will continue in full force and effect. All rights not expressly
granted are reserved.

VESDA VLI Product Guide VESDA by Xtralis
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Scope
The VESDA VLI Product Guide provides a comprehensive description of the VLIdetector and its accessories.
This guide introduces the VLI features, technical specifications and gives an understanding of its components
and their function. You will also find instructions on installing, cabling and powering up the detector.
This guide is for anyone involved with the design, maintenance and purchasing of a VESDA system. It is
assumed that anyone using this product has the knowledge and appropriate certification from local fire and
electrical authorities.
Document Conventions
The following typographic conventions are used in this document:
Convention Description
Bold Used to denote: emphasis. Used for names of menus, menu options,
toolbar buttons
Italics Used to denote: references to other parts of this document or other
documents. Used for the result of an action.
The following icons are used in this document:
Convention Description
Caution: This icon is used to indicate that there is a danger to
equipment. The danger could be loss of data, physical damage, or
permanent corruption of configuration details.
Warning: This icon is used to indicate that there is a danger of electric
shock. This may lead to death or permanent injury.
Warning: This icon is used to indicate that there is a danger of inhaling
dangerous substances. This may lead to death or permanent injury.
Contact Us
The Americas [phone]
Asia [phone]
Australia and New Zealand [phone]
UKand Europe [phone]
Middle East [phone]
www.xtralis.com

VESDA by Xtralis VESDA VLI Product Guide
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Codes and Standards Information for Air Sampling Smoke Detection
We strongly recommend that this document is read in conjunction with the appropriate local codes and standards
for smoke detection and electrical connections. This document contains generic product information and some
sections may not comply with all local codes and standards. In these cases, the local codes and standards must
take precedence. The information below was correct at time of printing but may now be out of date, check with your
local codes, standards and listings for the current restrictions.
FCC Compliance Statement
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15
of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a
residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed
and used in accordance with the instruction, may cause harmful interference to radio communications. However,
there is no guarantee that interference will not occur in a particular installation. If this equipment does cause
harmful interference to radio or television reception, the user is encouraged to try to correct the interference by one
or more of the following measures; re-orientate or relocate the receiving antenna, increase the separation between
the equipment and receiver, connect the equipment to a power outlet which is on a different power circuit to the
receiver or consult the dealer or an experienced radio/television technician for help.
FDA
This Xtralis product incorporates a laser device and is classified as a Class 1 laser product that complies with FDA
regulations 21 CFR 1040.10. The laser is housed in a sealed detector chamber and contains no serviceable parts.
The laser emits invisible light and can be hazardous if viewed with the naked eye. Under no circumstances should
the detector chamber be opened.
FM Hazardous Applications
3611 Hazardous Approval Warning: Exposure to some chemicals may degrade the sealing of relays used on the
detector. Relays used on the detector are marked “TX2-5V”, “G6S-2-5V” or “EC2-5NU”.
VESDA detectors must not be connected or disconnected to a PC while the equipment is powered in an FM
Division 2 hazardous (classified) location (defined by FM 3611).
FM Approved Applications
The product must be powered from VPS-100US-120, VPS-100US-220 or VPS-220 only.
AS1603.8
The performance of this product is dependent upon the configuration of the pipe network. Any extensions or
modifications to the pipe network may cause the product to stop working correctly. You must check that ASPIRE2
approves alterations before making any changes. ASPIRE2 is available from your authorized representative.
AS1851.1 2005
Maintenance Standards. Wherever this document and the AS1851.1 differ, AS1851.1 should be followed in
preference to this document.

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Regional Regulatory Requirements and Notices
UL
For open area protection the fire alarm threshold (signal) that initiates an evacuation procedure via the Fire
Alarm Panel must not be set less sensitive than 0.625%/ft. The detector can send this signal via the Fire
Alarm Panel Output signal or the Pre-alarm output signal.
Through validation testing, Underwriters Laboratories Inc. has verified that VESDA ECO gas detectors, when
installed within the sample pipe network, present no significant effects on the smoke detection performance of
VESDA. The use of the ASPIRE2 calculation software is required to verify system design performance with
all devices included in the design.
EN 54-20
The product must use a power supply conforming to EN 54-4.
The product is compliant with EN 54-20 sensitivity requirements provided the following conditions are met:
lFor a Class A detector, hole sensitivity must be better than 1.5% obscuration/m and transport time less
than 60 seconds
lFor a Class B detector, hole sensitivity must be better than 4.5% obscuration/m and transport time less
than 90 seconds
lFor a Class C detector, hole sensitivity must be better than 10% obscuration/m and transport time less
than 120 seconds
These limits should be verified using ASPIRE2 during the design of the sampling pipe network.
The product is compliant with EN 54-20 flow monitoring requirements provided the following conditions are
met:
The minor low and minor high flow thresholds should be set at 85% and 115% respectively
Additional information:
VESDA VLI was successfully tested and passed the EN 54-20 fire tests with the following configurations:
lClass C with 64 holes and a Fire-1 setting of 0.15% obscuration/m
lClass B with 28 holes and a Fire 1 setting of 0.15% obscuration/m
lClass A with 24 holes and an Alert setting of 0.06% obscuration/m
Note: These configurations were chosen to illustrate the maximum capability of the VESDA VLI in terms
of number of holes and sensitivity in a clean environment and necessitated the use of holes with a
diameter less than 3mm. As stated in Section 4.1, for industrial applications with high background
levels, hole sizes of less than 3mm should be avoided. Thus, the maximum number of holes may
not be realizable in some applications.
In all applications an ASPIRE2 design must be prepared to meet appropriate EN54-20 sensitivity transport
time targets, taking into consideration all factors including any local codes and standards for maximum
transport times.
Product Listings
lUL
lULC
lActivFire
lLPCB
lCE - EMC and CPD
lEN 54-20
Regional approvals listings and regulatory compliance vary between product models. Refer to www.xtralis.com for
the latest product approvals matrix.
Document: 18500_A2
Part Number: 29674

VESDA by Xtralis VESDA VLI Product Guide
www.xtralis.com 1
Table of Contents
1 Introduction 3
1.1 Features 3
2 Product Information 5
2.1 Detector Components 5
2.2 How the VLI works 6
2.3 Front Panel 8
2.4 Communication Ports 10
2.5 Specifications 11
2.6 Dimensions 13
2.7 VESDAnet 14
2.8 Accessories 15
3 Installation 17
3.1 Mounting 18
3.2 Wiring 20
3.3 Powering Up 28
3.4 Installation Checklist 29
3.5 Preliminary System Check 30
4 Pipe Network Design 31
4.1 Design Considerations 31
4.2 Installation Considerations 31
4.3 Inlet Pipes 31
4.4 Managing the Exhaust Air 32
5 Configuration 33
5.1 Connecting to a Standalone VESDA VLI Detector 33
5.2 Connecting to a VESDA VLIon VESDAnet 37
5.3 Access Levels 37
5.4 Commands 38
5.5 Configuration Options 40
5.6 Default Settings 48
6 Commissioning 51
6.1 AutoLearn Smoke 51
6.2 AutoLearn Flow 52
6.3 Commissioning Smoke Test 52
7 Maintenance 53
7.1 Set the Detector to Standby 53
7.2 Remove the Front Cover 54
7.3 Replacing the Intelligent Filter 55
7.4 Replacing the Secondary Foam Filter 56
7.5 Replacing the Aspirator 57
7.6 Replacing the Detection Chamber Assembly 58
7.7 Spare Parts 64
8 Troubleshooting 65
8.1 Fault Reporting through Relays 65
8.2 Troubleshooting with Xtralis VSC 65
8.3 Troubleshooting with a Remote Display 66
8.4 Troubleshooting with an LCD Programmer 66
A Commissioning Forms 67
A.1 VLI Detector Commissioning Form 68
A.2 Display/Relay Configuration 69

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A.3 Relay Configuration 69
A.4 VESDAnet Interface Card 69
A.5 ASPIRE2 Data 69
A.6 Smoke Test 70
A.7 Air Sampling Test Results 70
B Glossary 71
Index 73

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1 Introduction
The VESDA VLI is an aspirating smoke detector (ASD) that provides very early warning of fire conditions by
drawing air samples through an air sampling pipe network.
The VLI detector is especially designed to operate in industrial applications under harsh and dirty
environments. It incorporates features that specifically address the common challenges of industrial
installations, including:
lhigh background levels of airborne particles
lthe need for environmental enclosures
ldetector longevity
lthe need for on-site maintenance
VESDA VLI
!
DISABLED
RESET /
DISABLE
Figure 1-1: VESDA VLI Aspirating Smoke Detector
The detector easily interfaces with fire warning and fire suppression release systems, and can be integrated
into a building management system (BMS).
1.1 Features
The VLI detector contains the following features:
lArea coverage up to 2000m² (21,500ft²)
lUp to four inlet pipes
lTotal pipe length of 360m (1200ft)
lFive high intensity status LEDs
lRobust absolute smoke detection
lPatented Intelligent Filter
lInertial separator (sub sampling probe)
lLint trap to capture fibrous particles
lSecondary Foam Filter
lClean air barrier for optics protection
lReferencing (on VESDAnet enabled model)
lAutoLearn™ Smoke and Flow
lClean Air Zero™
lAir-path monitoring
lFive relays (fire, fault and three configurable) configurable as latching or non-latching
lOne (standard) or two GPIs (VESDAnet enabled model)
lUltrasonic flow sensing
lXtralis VSC, Xtralis VSM4 and ASPIRE2 software support
lIP54 enclosure

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lEasy mounting with steel support bracket
lModular field replaceable parts for ease of servicing
lReplaceable aspirator, detection chamber and filters
lBACnet over Ethernet
lLocal USBconfiguration port
lEasy cable termination access
lImperial and metric pipe ports
lRubberized finish to external housing
1.1.1 Intelligent Filter
The Intelligent Filter is fully monitored, fail-safe, and provides consistent sensitivity over the entire life of the
detector. The filter significantly reduces the exposure of the internals of the detector to contaminants in the
incoming air while providing consistent sensitivity to smoke. Refer to Section 2.2 for further information.

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2 Product Information
2.1 Detector Components
The VLI detector contains a number of field-replaceable components.
A
B
C
D
E
F
G
Legend
AFront cover EChamber assembly with tertiary
clean air filter
BIntelligent Filter FAspirator
CSecondary Foam Filter GBase
DElectrostatic Discharge (ESD)Cover
Figure 2-1: Detector components
Refer to Chapter 7 for further information regarding maintenance scheduling and availability of spare parts.

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2.2 How the VLI works
The VLI detector continually samples air from the protected environment via a sampling pipe network (A).
Upon entering the detector, the air passes four sets of ultrasonic flow sensors (B), then through the mixer
compartment of the Intelligent Filter (C), where it is split between two pathways. One pathway carries the
majority of the air through a HEPAfilter, while the other carries a small proportion of the air through a separate
set of ultrasonic flow sensors (D). The air then recombines in the main aspirator (F).
A
B
D
E
F
G
H
J
K
L
M
I
N
C
Legend
APipe Inlets
BUltrasonic Flow Sensors
CIntelligent Filter
DUltrasonic Flow Sensor
EManifold
FMain Aspirator
GSampling Probe
HSecondary Foam Filter
IChamber Assembly
JChamber Flow Sensor
KChamber
LTertiary Clean Air Filter
MAuto Zero Aspirator
NExhaust
Figure 2-2: Internal airflow example
Note: The Intelligent Filter loading is constantly monitored using the ultrasonic flow sensors in the
unfiltered path (D). Coupled with the arrangement of the four sets of ultrasonic flow sensors at the
detector air inlets (B), the detector measures the split of the airflow ratio as the filter loading
increases. The detector maintains the sensitivity depending on the flow ratio, thus ensuring
consistent and reliable operation over time.
A portion of recombined air sample is then passed through the sub-sampling probe (inertial separator) and
secondary foam filter (H). Larger dust particles are unable pass through the probe and filter arrangement and
hence are exhausted out of the detector (N). This eliminates nuisance alarms caused by larger dust particles
and extends the life of the detection chamber (K). The tertiary clean air filter (L)provides clean air to form the
clean air barriers within the detection chamber (K), which protects the optical surfaces from contamination.
The presence of smoke in the detection chamber (K) creates light scattering which is detected by the sensor
circuitry. The air sample is measured, and the detector reports smoke levels in line with the sensitivity ratio
determined by the Flow Sensors (B and D). Air is exhausted from the detector and may be vented back into
the protected area (N).
Note: The status of the detector, all alarms, service and fault events, are monitored and logged with time
and date stamps. Status reporting can be transmitted via relay outputs, across VESDAnet
(VESDAnet version only) or BACnet.

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2.2.1 Clean Air Zero
Clean Air Zero is a user-initiated feature which is primarily intended to safeguard against nuisance alarms.
This is achieved by introducing clean air into the detection chamber and taking a reference reading. This
reading is then offset against the actual environmental background to maintain consistent absolute smoke
detection.
The user can initiate the Clean Air Zero process using Xtralis VSC. It takes up to 60 seconds to complete,
during which time the detector is offline.
Clean Air Zero Process
When the user initiates the Clean Air Zero process from within the Xtralis VSC software, the following actions
occur:
1. The main aspirator is turned off.
2. The Clean Air Zero aspirator located inside the chamber assembly is turned on. This aspirator pumps
clean air into the Chamber and removes any contaminated air.
3. After a waiting period, a smoke reading is taken with clean air in the chamber. This reading is the new
clean air background value and is used as a reference point against the actual environmental background.
4. The Clean Air Zero aspirator is turned off and the main aspirator is turned back on.
5. An event indicating that the Clean Air Zero process has taken place is added to the event log.

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2.3 Front Panel
The VLI detector provides the following information and control capability:
lStatus LEDs: Alarm, Pre-Alarm, Disabled, Fault and Power.
lControls: Reset and Disable button.
!
DISABLED
RESET /
DISABLE
Figure 2-3: Front Panel Controls and LEDs
Status LEDs
Table 2-1: LED Indicators
LED Description
Alarm The ALARM LED is lit when the Fire1 Alarm threshold is reached.
Pre-Alarm The PRE-ALARM LED blinks when the Alert threshold is reached.
The PRE-ALARM LED is lit when the Action threshold is reached.
Disabled The DISABLEDLED is lit when the detector is disabled.
Fault The FAULT LED is lit when a fault condition is detected.
Refer to Chapter 8 for information on troubleshooting.
Power The POWERLED illuminates when the detector is powered up.
Notes:
lThe LEDs are tested during the power up cycle. To manually test the LEDs, run the Lamp Test using
Xtralis VSC.
lPower and Fault LEDs are also present on the main board inside the VLI for when the front panel is
disconnected during installation or maintenance.

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RESET / DISABLE Button
Resetting the detector unlatches all latched alarms and faults, returns relays to their normal state and clears
the active event list.
lTo reset the detector, press this button once.
Disabling the detector disables all the output relays associated with the detector. The aspirator remains
active.
lTo disable the detector, press and hold the button for approximately 2 seconds, until the DISABLED
LEDilluminates.
lTo re-enable the unit, press and hold the button for approximately 2 seconds, until the DISABLED
LEDdeactivates.
lWhile the detector is disabled, any faults may be cleared by pressing this button once.
The button will not operate if:
lthe detector is disabled through the GPI function; or
lthe RESET / DISABLE button has been locked out in the programming.

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2.4 Communication Ports
The majority of user operations are performed using software installed on a computer connected to the
detector via one of the communication ports.
The communication ports are located on the main board inside the detector. It is necessary to remove the front
cover from the detector in order access these ports. Refer to Section 7.2 for the front cover removal
procedure.
USB
The USBport is used for configuration purposes. It allows direct connection between the VLI detector and a
PC or laptop installed with Xtralis VSC.
Refer to Section 3.2.3 for information on connecting the USBlead, and Section 5.1 for information on creating
connection profiles in Xtralis VSC.
Note: The USBport should not be used for continuous monitoring with the Xtralis VSM4 software.
Monitoring should be performed using a connection made via the Ethernet port.
Ethernet
The Ethernet port is used for configuration and/or monitoring purposes. It enables direct or routed TCP/IP
network connection between the detector and a PC or laptop installed with Xtralis VSC, or other BACnet
protocol compatible applications.
Refer to Section 3.2.3 for information on connecting the Ethernetlead, and Section 5.1 for information on
creating connection profiles in Xtralis VSC.
RS485
The RS485 port is present on the VESDAnet Card of the VESDAnet enabled model, and can be used for
configuration of any device on the VESDAnet. It provides connectivity for the handheld LCDProgrammer or a
local PC or laptop via a High Level Interface (HLI). Refer to Section 2.8.2 for further information on the
LCDProgrammer.

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2.5 Specifications
Specification Value
Supply Voltage 18 to 30 VDC
Power Consumption @24 VDC lNormal: 9.6W
lAlarm on:10.8W
Current Consumption lNormal: 415mA
lAlarm on: 440mA
Dimensions (WHD) 426.5mm x 316.5mm x 180mm
(16.8 in x 12.5in x 7.1in)
Weight 6.035 Kg (13.3Lbs)
Operating Conditions
(To operate the VESDA VLI detector outside
these parameters please contact your
nearest Xtralis Office)
Temperature:
lAmbient: 0° to 40°C (32° F to 104°F)
lTested: -10° to 55°C (14°F to 131°F)
lSampled Air: -20° to 60°C (-4° to 140°F)
Humidity:
l10-95% RH, non-condensing
Storage Conditions
(Non-operational)
lBattery life: Up to 2 years
lHumidity:Dry (<95%)
lTemperature: 0° to 85°C
lMust not be exposed to sunlight or other radiation sources
Sampling Pipe Network lMaximum length per single straight pipe: 120 m (350 ft)
lTotal pipe length: 360 m (1200 ft)
lPipe Modeling Design Tool:ASPIRE2
lMinimum total airflow:40 l/m
lMinimum airflow per pipe: 20 l/m
Pipe Size lInternal Diameter: 15-21 mm (0.874 inch)
lExternal Diameter: 25 mm (1.05 inch)
Relays l5 relays - Fire, Fault, 3 x Configurable.
lContacts rated 2A @ 30 VDC.
lProgrammable to latch or non-latch states
lProgrammable 0 - 60 sec delay for each relay
IP Rating IP54 (protection against ingress of dust and water splash)
Mounting Upright or inverted with supplied mounting bracket
Cable Access 4 plastic plugs (2 top, 2 bottom), 25.4mm (1 inch) diameter.
Note: To maintain the IPrating, IP54 compliant cable
glands must be used.
Cable Termination Screw terminal blocks (0.2-2.5 sq mm, 30-12 AWG)
Interfaces lUSB (Type 2)
lEthernet (RJ45)
lRS485 (VESDAnet enabled detectors)
Alarm Range 0.005 to 20.00% obs/m (0.0015 to 6.4% obs/ft.)
Table 2-2: VLI Detector Specifications

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Specification Value
Threshold Setting Range lAlert: 0.05%–1.990% obs/m
(0.016% - 0.637% obs/ft)
lAction: 0.1%–1.995% obs/m
(0.032% - 0.638% obs/ft)
lFire1: 0.15 %–2.0% obs/m
(0.048% - 0.64% obs/ft)
lFire2: 0.155 %–20.0% obs/m**
(0.05% - 6.4% obs/ft)
** Limited to 12% obs/m (4% obs/ft.) in UL mode
Referencing Reference smoke level source for the VESDAnet enabled
model.
Table 2-2: VLI Detector Specifications (continued...)
Notes:
Ensure that UL Mode is switched ON to maintain the UL listing.
lUL Mode = ON: Fire2 set to 12% obs/m (4% obs/ft.) to comply with UL268
lUL Mode = OFF: Fire2 threshold can be set up to 20% obs/m (6.4%/ft)
Table 2-3: Key Software Features
Event Log Up to 18,000 events stored on FIFO basis
AutoLearn lMinimum 15 minutes
lMaximum 15 days, 23 hrs, 59 minutes
lRecommended minimum period: 1 day
Thresholds are automatically changed from the previously set
values to the updated values after the AutoLearn process has
completed.
Referencing Adjustment for external ambient conditions
Four Alarm Levels Alert, Action (PRE-ALARM), Fire1 (ALARM) and Fire2
Two Fault Warning Levels Minor Fault and Urgent Fault
Maintenance Aids lFilter and flow monitoring
lEvent reporting via VESDAnet, BACnet and event log
Table 2-4: Ordering Information
VESDA VLI Standalone VLI-880
VESDA VLIwith VESDAnet Card VLI-885
VESDA VLIRemote Display with RTC7 VRT-Q00
VESDA VLIRemote Display with RTC0 VRT-T00
LCDProgrammer VRT-100
Hand-held LCD Programmer VHH-100
Note: Refer to Section 7.7 for the spare parts list.

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2.6 Dimensions
G G G HFED
I
LK
EJ
I
C
AB
mm inch
A180 7.08
B426.5 16.8
C316.5 12.46
D70.2 2.76
E45 1.77
F149 5.87
G34 1.34
H60.3 2.37
I26.7 1.05
J70.2 2.76
K105 4.13
L206.3 8.11
Figure 2-4: Front Dimensions
D E D
B
C
GH
F
A
mm inch
A426.5 16.8
B316.5 12.46
C75 2.95
D88.25 3.47
E250 9.84
F96.3 3.8
G115.2 4.54
H105 4.13
Figure 2-5: Rear Dimensions

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2.7 VESDAnet
VESDAnet is a proprietary communications protocol which is used on a network that connects the VESDA
range of smoke detectors, displays, programmers and remote units and enables them to communicate on a
VESDAnet network.
A VESDAnet network allows:
lconfiguration and monitoring of devices from a central computer.
lconnection to a reference detector.
lconnection to additional accessories such as remote displays.
The VESDAnet enabled VLI detector (VLI-885) can be joined to a VESDAnet network, and provides a
connection point on the VESDAnet for a High Level Interface (HLI), which is required to connect a PCor
laptop to the VESDAnet. Alternately, the connection point can be used for a hand-held LCDProgrammer (refer
to Section 2.8.2). The VLI-885 also contains a socket on the VESDAnet card for monitored General Purpose
Input (refer to Section 3.2.7).
Refer to the VESDA Communications Guide for further information on VESDAnet network connectivity.