Kentec Electronics S793 Technical manual

4 Channel NAC Module (S793)
Information Guide
UL Version 1.00 |March 2021 |MAN-1442KE

CONTENTS
Contents 2
Compliance 4
Underwriters Laboratories (UL) 4
FCC 4
Installation 4
Introduction 5
Technical Support 5
Return Material Authorization (RMA) 5
Warranty Service 6
Advanced Replacements 6
Overview 7
Package Contents 7
Installation 9
Before You Begin 10
Setting the Address 10
Placement 11
Wiring 12
Circuits 12
Field Wiring 13
Testing the Installation 14
Configuration 15
NACModule Properties 15
Channel Properties 16
4 Channel NAC Module (S793) Information Guide
Kentec Electronics Ltd
4 Channel NAC Module (S793) Information Guide
UL Version 1.00 |March 2021 |MAN-1442KE
Page 2

Pattern Output 17
Strobe Output 17
Power Output 17
ULCompliance Limitations 18
Troubleshooting 19
Specifications 22
Overall Module Electrical Ratings 22
Operating Environment 22
Physical Specifications 22
NAC Outputs 23
Regulated NAC Outputs 23
Special Application NAC Outputs 24
NACPower Output Modes 25
Connections for NACPower Output Modes 25
Continuous Constant Power 25
Door Holder 26
Resettable 26
Kentec Electronics Ltd
4 Channel NAC Module (S793) Information Guide
UL Version 1.00 |March 2021 |MAN-1442KE
Page 3
4 Channel NAC Module (S793) Information Guide

COMPLIANCE
Underwriters Laboratories (UL)
Fire Alarm Subassembly
Kentec Electronics Ltd
FCC
This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part
15 of the FCCRules. These limits are designed to provide reasonable protection against harmful interference
when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate
radio frequency energy and, if not installed and used in accordance with the Installation Manual, may cause
harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause
harmful interference in which case the user will be required to correct the interference at his own expense. Any
changes or modifications not expressly approved by Kentec Electronics Ltd could void the user's authority to
operate this equipment under the rules and regulations of the FCC.
Operation is subject to the following two conditions:
(1)This device may not cause harmful interference, and
(2) This device must accept any interference received, including interference that may cause undesired
operation.
Installation
Install this product in accordance with NFPA 13, NFPA 72, NFPA 70, and NEC 70 and all local codes.
All field wiring should be installed using fire rated cables according to the NFPA 72. Riser conductors shall be
installed in accordance with the survivability from attack by fire requirements in National Fire Alarm Code, NFPA
72, Section 12.3. Riser conductors shall employ either a 2 hour rated cable system, or meet requirements
approved by the AHJ.
4 Channel NAC Module (S793) Information Guide
Kentec Electronics Ltd
4 Channel NAC Module (S793) Information Guide
UL Version 1.00 |March 2021 |MAN-1442KE
Page 4

INTRODUCTION
Technical Support
For technical support, contact Kentec Electronics, Ltd at [phone] or [e-mail].
Prior to contacting technical support, have the following information available:
nProduct part number
nPurchase order or order number
nProduct serial number
nCurrent function of the product
nExpected function of the product
nInstallation of the product
Return Material Authorization (RMA)
Contact Technical Support to obtain an RMAfor any product to be returned. Returns will not be accepted
without an accompanying RMA number. An RMA number is assigned when:
lTech Support acknowledges a possible product failure.
lA product was damaged during shipping
lAn incorrect product was shipped
lAn order was placed using an incorrect part number *
lAn order was placed using an incorrect part quantity *
lAn order is no longer required *
* Restocking fees may apply.
All returned products are tested to confirm operating failures experienced in the field. If the product is found to be
functional, contractors must absorb expenses for return shipping, as well as the cost and shipping of the
advanced replacement product.
Prominently display the RMA number on all packages sent for return.
Ship all return products to:
Kentec Electronics Ltd
4 Channel NAC Module (S793) Information Guide
UL Version 1.00 |March 2021 |MAN-1442KE
Page 5
4 Channel NAC Module (S793) Information Guide

Attention: RMA # _____________
Kentec Electronics, Ltd
Units 25-27 Fawkes Avenue
Questor, Dartford
Kent. DA1 1JQ
United Kingdom
Warranty Service
Technical Support can replace or repair a defective product when the original purchase is within the warranty
period defined in the sales contract. Check your contract for more information, or contact your sales
representative about your specific warranty period.
Advanced Replacements
Products that fail to operate in the field can be replaced quickly using the advanced replacement process. The
advanced replacement process is available to all contractors who maintain an acceptable line of credit.
Initiate the advanced replacement process by requesting an RMA number from a Tech Support representative.
Advanced replacements can be shipped to your location when the product is covered under warranty and when
a replacement product is in stock.
lAdvanced replacements can be expedited at the request of the contractor. Shipping costs associated with this
process are the responsibility of the contractor.
lProducts returned using the advanced replacement process must be received within 30 days of the RMA issue date.
4 Channel NAC Module (S793) Information Guide
Kentec Electronics Ltd
4 Channel NAC Module (S793) Information Guide
UL Version 1.00 |March 2021 |MAN-1442KE
Page 6

OVERVIEW
4 Channel NAC Module (S793)
The 4 Channel NACpanel modules are typically used in applications that require more than the standard panel
NAC outputs. Each of these modules adds 4 additional supervised NAC outputs, each of which can be
individually programmed.
These modules may be mixed with 16 Channel I/O modules, 8 Channel Conventional Zone modules, or 8
Channel Relay modules to provide a very flexible system of I/O to satisfy almost any requirement. All inputs and
outputs are configurable in the same way as devices connected to the loops and all may contribute to, or be
acted upon, by cause and effect logic.
Package Contents
l(1) Installation sheet
l(1) Wiring Terminal Labels
Kentec Electronics Ltd
4 Channel NAC Module (S793) Information Guide
UL Version 1.00 |March 2021 |MAN-1442KE
Page 7
4 Channel NAC Module (S793) Information Guide

l(1) S793 4 Channel NAC Panel Module
l(4) End-of-Line Diode (S2029)
4 Channel NAC Module (S793) Information Guide
Kentec Electronics Ltd
4 Channel NAC Module (S793) Information Guide
UL Version 1.00 |March 2021 |MAN-1442KE
Page 8

INSTALLATION
This section explains the installation procedure for the 4 Channel NAC Panel Module.
qUsing Loop Explorer 2, add the panel module to the existing configuration and configure it as required for the
system. For detailed information on the configuration settings, refer to the Configuration section.
qNotify the monitoring center and location security that the Taktis Fire Alarm ControlPanel will be temporarily out of
service.
qRemove the module from its packaging and check its contents.
qSet the address of the module as configured in Loop Explorer 2. Refer to Setting the Address for details.
qDetermine the slot (D or higher) where the panel module will be installed and place the provided sticker label on the
corresponding field terminals.
qConnect field wiring and install appropriate end-of-line diodes (included with module).
qTransfer the new configuration from Loop Explorer 2 into the panel.
qWait for the "Sending configuration to panel" (in LE2) and "Saving configuration" (on the panel) steps to complete.
qRemove AC and battery power from the panel.
qRemove the black plastic cover.
qInstall the module into selected slot on the Main Back Board or an Extension Board of the panel.
qRestore AC and battery power.
qWait for the panel start-up process to complete. Refer to the Taktis Fire Alarm ControlPanel
InstallationManual (MAN-1431KE) for more information.
qTest communication from the panel via the LEDStatus Indicators
qResolve any troubles related to the new NACs.
qActivate each circuit and verify that all connected devices function properly.
qReplace the black plastic cover.
Kentec Electronics Ltd
4 Channel NAC Module (S793) Information Guide
UL Version 1.00 |March 2021 |MAN-1442KE
Page 9
4 Channel NAC Module (S793) Information Guide

Install this product in accordance with NFPA 72, the National Electrical Code, and all local codes.
IMPORTANT! The module must be installed by personnel familiar with electronic components. Electronic
components within the module are vulnerable to damage from electrostatic discharge. Ground straps must be worn by
installers before handling to prevent electrostatic discharge damage.
Before You Begin
Before you begin the installation, take a few minutes to review the installation information, gather the required
items, and complete the tasks listed below to make the installation as quick and easy as possible:
1. Acquire the following items that are not included with the 4 Channel NAC Module, but may be required for
installation:
lGround Strap - A ground strap is required for handling circuit boards. The ground strap is not provided in the
packaging of the 4 Channel NAC Module.
Setting the Address
Panel modules should use addresses 1-8. Each panel module of the Taktis Fire Alarm ControlPanel must
contain a unique setting before being connected to the Main Back Board. The binary setting of the DIP switch
sets the specific address for the panel module. The numeric order of the address setting between modules does
not impact operation, but each panel module must be assigned a separate / unique address.
The black portion of the DIP switch identifies the switch actuator.
4 Channel NAC Module (S793) Information Guide
Kentec Electronics Ltd
4 Channel NAC Module (S793) Information Guide
UL Version 1.00 |March 2021 |MAN-1442KE
Page 10

Placement
To install modules on the Taktis Fire Alarm ControlPanel:
1. Disconnect AC power and standby batteries prior to performing the module installation.
2. Remove the retaining screw and plastic cover.
3. Remove the panel module from the protective packaging using adequate electrostatic protection.
4. Point the conductor side of the panel module toward the backplate.
5. Insert the notched end of the panel module in the metal guide notch of the backplate at an angle, as shown.
Kentec Electronics Ltd
4 Channel NAC Module (S793) Information Guide
UL Version 1.00 |March 2021 |MAN-1442KE
Page 11
4 Channel NAC Module (S793) Information Guide

The photo above is an example of panel module placement and may not be representative of the specific module
and slot placement described in this guide. Refer to the checklist above for details on placement.
6. Rotate the panel module until all conductors are securely inserted into connectors of the Main Back Board.
7. Replace the cover onto the Main Back Board.
8. Reconnect the batteries and restore ACpower.
Wiring
Circuits
The 4 Channel NAC panel module has 4 supervised output circuits (Class B). Pairs of these output circuits can
be configured to form individual Class A circuits. Class A operation can be assigned to the first pair of notification
appliance circuits (NAC1&2) or the second pair (NAC3&4) or both pairs.
4 Channel NAC Module (S793) Information Guide
Kentec Electronics Ltd
4 Channel NAC Module (S793) Information Guide
UL Version 1.00 |March 2021 |MAN-1442KE
Page 12

By default, all circuits are programmed Class B. When circuits are wired Class A but not programmed to match
(and vice versa), circuits will report wiring trouble.
Field Wiring
All devices on a given circuit need to be connected in a daisy-chain. For Class A circuits, only one of the two End-
of-Line diodes is used. Install the diode on the +/- terminals of the second NAC in the pair. For Class B circuits,
the End-of-Line diode must be placed after the last device on the circuit. Unused circuits must be terminated with
an End-of-Line diode or they will report a trouble condition.
Refer to the Taktis Fire Alarm ControlPanel InstallationManual (MAN-1431KE) for cabling specifications.
Branching of Class A or Class B notification appliance circuits prevents proper circuit supervision and is not
permitted by UL and most AHJs.
IMPORTANT! Dotted lines indicate unsupervised branch
Kentec Electronics Ltd
4 Channel NAC Module (S793) Information Guide
UL Version 1.00 |March 2021 |MAN-1442KE
Page 13
4 Channel NAC Module (S793) Information Guide

circuits.
Reroute wiring as shown, to ensure all wiring is
properly supervised.
Testing the Installation
1. Confirm communication from the panel via the LEDstatus indicators. LED indicators provide functional and
diagnostic information as shown below.
2. Resolve any troubles related to the new NACs.
3. Activate each circuit and verify that all connected devices function properly.
Refer to the Troubleshooting section for information on clearing abnormal conditions.
LED Label Name Color Description
LED 1 Heartbeat Red Flashes every 2 seconds when theboard is operating.
LED 2 Rx Comms Green Flashes every 2 - 3 seconds when the module is receiving data from the
panel.
LED 3 Tx Comms Green Flashes every 2 - 3 seconds when the module is transmitting data to the
panel.
LED 4 Trouble Yellow Flashes every 2 seconds when one or more outputs have a trouble
condition.
LED 5 Input Active LED Red Not used.
LED 6 Output Active LED Red Flashes every 2 seconds when one or more outputs are active (supplying
24V).
4 Channel NAC Module (S793) Information Guide
Kentec Electronics Ltd
4 Channel NAC Module (S793) Information Guide
UL Version 1.00 |March 2021 |MAN-1442KE
Page 14

CONFIGURATION
The 4 Channel NACPanel Module can be configured via LE2 or the Panel GUI.
NOTE The panel module must be added to the configuration via Loop Explorer 2 or an Autolearn on the panel.
NACModule Properties
1. Set the Circuit Current Limit, between 0.5 A- 2.3 A. This is the maximum current that can be provided by each
circuit. This setting applies to all output circuits of this module, whether Class A or Class B. The default setting is
2.3 A.
NOTE The maximum operating current for all 4 channels combined is 5A.
2. Set the Wiring Class to A or B for each circuit. Wiring class can only be selected in output pairs. When Class A is
selected, the output pair forms a single circuit. When Class B is selected, the output pair forms two independent
circuits.
By default, all circuits are programmed Class B. When circuits are wired Class A but not programmed to match
(and vice versa), circuits will report wiring trouble.
Kentec Electronics Ltd
4 Channel NAC Module (S793) Information Guide
UL Version 1.00 |March 2021 |MAN-1442KE
Page 15
4 Channel NAC Module (S793) Information Guide

Channel Properties
3. Notification Circuit Parameters. The Notification Circuit Parameter should be selected first because it
defines which of the three broad categories the output will use. The three categories are:
lPattern Output (default)
lStrobe Output
lPower Output
4 Channel NAC Module (S793) Information Guide
Kentec Electronics Ltd
4 Channel NAC Module (S793) Information Guide
UL Version 1.00 |March 2021 |MAN-1442KE
Page 16

Pattern Output
To configure a continuous 24 V output (i.e., to power one or more notification appliances that are not
required to be synchronized) during activation, select Pattern Output, then Continuous from the Pattern
drop-down menu.
To configure a pulsing 24 V output (i.e., to power a simple bell) during activation, select Pattern Output,
then Panel Global Pattern from the Pattern drop-down menu. This selection will follow the panel pattern
setting, configured in the panel settings.
Strobe Output
To use a built-in manufacturer's synchronization protocol, select Strobe Output. By default, the Alarm
Silence button on the panel will silence only horns. Select Strobe Silence to configure the Alarm Silence
button to silence the horns and strobes.
Power Output
To configure the output to supply power for a non-NACapplication, deselect Strobe Output and Pattern
Output. The following options are available from the AUX 24V DCdrop-down menu.
lContinuous Constant Power - Continuous constant power provides a voltage output comparable to AUX 24V.
lDoor Holder - Door Holder outputs lose power during fire alarm conditions and/or during ACpower loss.
lResettable - Resettable causes power loss that lasts 4-5 seconds each time the panel is reset.
NOTE Refer to NACPower Output Modes for more information on these options.
4. Select the desired Output options. This selection will activate the circuit when the selected event(s) occur. To use
cause and effect programming, LE2 must be used for configuration and all output options must be deselected.
5. Set whether the output will be Silenceable. Each NAC is configurable in reaction to the Alarm Silence button on the
front panel. Check the box if the NAC should return to normal standby when Alarm Silence is active.
6. Each output circuit is normally Off, but On upon activation. Selecting Output Invert will set the circuit to be normally
On, but Off upon activation.
7. Ignore Global Delays. This setting controls the delay of the activation of the output. If unchecked, it will activate
based on the Global Delay settings in the Panel Settings. If checked, it will activate based on the settings in the
First Delay and Second Delay fields. Second Delay is only visible if the output is silenceable. For ULcompliance,
both delays must be set to 0.
Kentec Electronics Ltd
4 Channel NAC Module (S793) Information Guide
UL Version 1.00 |March 2021 |MAN-1442KE
Page 17
4 Channel NAC Module (S793) Information Guide

NOTE If checked,
- the initial activation of the output will be delayed based on the settings in the First Delay field.
- if the output is silenceable, subsequent re-sounding of the output will be delayed based on the settings in the Second
Delay field.
8. Enter a Duration to select how long an output will be active. If set to 0, it will remain active until the system is reset.
For ULcompliance, this field should be set to 0.
9. Set the Location Text, up to 80 characters. This text is displayed when the circuit reports trouble.
10. Use the Map to Zone field to set the zone number for the circuit. Allowable values are 0-2000.
ULCompliance Limitations
In order for the product to comply with the requirements in the Standard for Control Units and Accessories
for Fire Alarm Systems, UL 864 10th Edition, certain programming features or options must be limited to
specific values or not used at all as indicated below.
Field Configurable Range ULPermitted Value / Range
Duration 0 seconds - 23 hours, 59 minutes, 50 seconds 0 seconds
First Delay 0 minutes - 10 minutes 0 minutes
Second Delay 0 minutes - 10 minutes 0 minutes
4 Channel NAC Module (S793) Information Guide
Kentec Electronics Ltd
4 Channel NAC Module (S793) Information Guide
UL Version 1.00 |March 2021 |MAN-1442KE
Page 18

TROUBLESHOOTING
Problem Solution(s)
Open Circuit. End-of-Line Diodes are installed backwards,
causing a trouble event:"NACOutput # has a full open
circuit trouble".
Install the End-of-Line Diode in the proper orientation.
Open Circuit. A break in the wiring pathway exists and
causes a trouble event: "NACOutput # has a full open
circuit trouble".
Investigate the wiring problem and correct any interruptions in
the circuit. When the wiring issue is resolved, the trouble on
the panel will restore.
Trouble NAC Output # has a Voltage Limit Trouble.
Voltage on the circuit is dropping excessively. When NACs
are activated, they will shut down within milliseconds of
activation. This process will repeat 3 times and then NACs
will shut down completely and the panel will display a
Voltage Limit Trouble. This is typically caused by an
excessively overloaded circuit.
Recalculate the load on the system and remove the number of
devices necessary to ensure the circuit's current limit is not
exceeded. To test the current limit, activate the NAC circuits
and verify proper operation. If panel posts a Current Limit
Trouble, refer to NACCurrent Limit Trouble below.
Short Circuit. A connection exists between a positive and
negative conductor on the wiring pathway.
Investigate the wiring, looking for an obvious cause of a short
circuit. If not obvious cause exists, perform the following
procedure.
1. Disconnect the field wiring from the panel (both ends of
a Class Acircuit). The trouble should change to an
Open Circuit Trouble.
2. Break the connection at the halfway point of the wiring
pathway.
3. Using an ohm meter, determine which half of the path
Kentec Electronics Ltd
4 Channel NAC Module (S793) Information Guide
UL Version 1.00 |March 2021 |MAN-1442KE
Page 19
4 Channel NAC Module (S793) Information Guide

Problem Solution(s)
contains the short.
4. Repeat steps 2 and 3 until the short is located.
5. Repair the cause of the short, reconnect all of the
breaks, and reconnect the field wiring to the panel.
Wiring Trouble. If a wiring trouble occurs when NACs are
activated, the likely cause is an excessive wire resistance
condition that exists on an active Class A circuit, resulting
in reduced voltage at the INterminals of the panel. This
results in a trouble being reported and the panel powering
both the INand OUTterminals.
This type of trouble will clear when Reset System is
pressed on the panel.
If the wiring path is excessively long, a lower gauge wire may
need to be used. Use the calculator in Loop Explorer 2 to
verify that the appropriate wire was used during installation.
If the appropriate wire was used, there may a high resistance
connection somewhere on the circuit.
1. To locate the cause, disconnect the field wiring from
the INterminals.
2. Activate the circuit.
3. Determine whether the last device on the circuit is still
operational. If not, locate the last operational device
along the path. The voltage drop is likely between the
operational and non-operational device. Move to step
6.
4. If all devices are operational, measure the voltage at
the OUTterminal and the IN terminal for comparison.
5. Starting from the OUTterminal, measure the circuit
voltage at various locations until a significant voltage
drop is located.
6. Repair the loose connection between these two
devices. If no loose connections are found, temporarily
run new wire between the two devices and determine if
this corrects the trouble. If this corrects the issue,
permanently replace the wire between the two devices.
Wiring Trouble. If pressing Reset System does not clear
the trouble, the likely cause is that the panel has detected
Class A wiring on a circuit programmed Class B OR Class
B wiring on a circuit programmed Class A.
Correct the programming so that it matches the wiring
configuration.
Trouble NAC Output # has a Current Limit Trouble.
Devices on the circuit are exceeding the current limit. When
NACs are activated, they will shut down within milliseconds
of activation. This process will repeat 3 times and then
Verify the programmed current limit. If the limit is set
correctly, verify that the installed devices do not exceed the
programmed current limit. Then, check for defective devices
4 Channel NAC Module (S793) Information Guide
Kentec Electronics Ltd
4 Channel NAC Module (S793) Information Guide
UL Version 1.00 |March 2021 |MAN-1442KE
Page 20