Excelitas Technologies OmniCure AC5 Series User manual

035-00629R_Rev 3
OmniCure® AC5 Series User Guide
Applicable for the following UV LED Head models:
Excelitas Canada Inc.
2260 Argentia Road
Mississauga (ON)
L5N 6H7 Canada
+1 905.821.2600
www.excelitas.com
Model
Array Curing Width
Part Numbers
395nm Wavelength
405nm Wavelength
AC550
50
019-00279R-03
N/A
AC575
75
019-00280R-03
019-00421R-04
AC550P
50
019-00281R-03
N/A
AC575P
75
019-00282R-03
N/A

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User Guide
035-00629R
Excelitas Canada Inc. 2023
All rights reserved
No part of this publication may be reproduced, transmitted, transcribed, stored in a retrieval system or
translated into any language in and form by any means without the prior written consent of Excelitas Canada
Inc. Every effort has been made to ensure information in this manual is accurate; however, information in this
manual is subject to change without notice and does not represent a commitment on the part of the authors.
Trademarks:
OmniCure® is a trademark of Excelitas Canada Inc. All rights reserved. All other product names are
trademarks of their respective owners. All product or software photos shown are for reference only and are
subjected to change without notice.
Made in Canada. Doc. No. 035-00629R

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Revision History
Revision #
Comments
Rev .0
Initial release
Rev. 1
Updates to regulatory section and webpage links
Rev. 2
Updates to regulatory section
Rev. 3
Addition of AC575-405

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Table of Contents
1Introduction .........................................................................................................................1
2Safety Precautions/ User Warnings ........................................................................................2
Glossary of Symbols:........................................................................................................................................2
Safety Precautions: ..........................................................................................................................................2
3Optical Safety Data...............................................................................................................4
4Getting Started ....................................................................................................................5
Packaging Contents ......................................................................................................................................... 5
System Requirements ......................................................................................................................................5
Powering Up and Powering Down .................................................................................................................... 7
5Mounting the UV Head..........................................................................................................8
UV LED Head ...................................................................................................................................................8
Mounting the UV LED Head .............................................................................................................................9
UV LED Head Dimensions ................................................................................................................................9
6Connecting the UV LED Head .............................................................................................. 11
Interfacing with the System Controller (PLC).................................................................................................. 11
Integrating Monitoring with External Circuitry................................................................................................ 12
Interfacing with the Power Cable.................................................................................................................... 12
7Using the LED Head ............................................................................................................ 13
Understanding the LED Indicators.................................................................................................................. 13
Fault Status.................................................................................................................................................... 14
Symptoms and Possible Causes...................................................................................................................... 14
8Care and Maintenance......................................................................................................... 16
Cautions and Handling ................................................................................................................................... 16
Cleaning Materials ......................................................................................................................................... 16
Cleaning the LED Head .................................................................................................................................. 17
Cleaning the LED Head Air Intake................................................................................................................... 17
9Technical Specifications ......................................................................................................18
Environmental Conditions.............................................................................................................................. 18
UV LED Head Specifications........................................................................................................................... 18
Regulatory Compliance .................................................................................................................................. 19
WEEE Directive .............................................................................................................................................. 19
China RoHS....................................................................................................................................................20
10 Warranty............................................................................................................................ 21
Checking Your Lamp Hours ............................................................................................................................ 21
Replacement UV LED Module Warranty ......................................................................................................... 21
Returning your AC5- System to Excelitas Technologies for Service .................................................................22
11 Contact Information ........................................................................................................... 23

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Figures
Figure 1 UV LED Head Connection Ports...................................................................................................................6
Figure 2 PLC Console ................................................................................................................................................6
Figure 3 UV LED Head ..............................................................................................................................................8
Figure 4 UV LED Head Dimensions............................................................................................................................9
Figure 5 Underside of AC550 ................................................................................................................................... 10
Figure 6 Underside of AC575 ................................................................................................................................... 10
Figure 7 PLC Connector (looking at UV Head).......................................................................................................... 11
Figure 8 PLC Digital Output Equivalent Circuit......................................................................................................... 12
Figure 9 Power Connector (looking at UV Head)...................................................................................................... 12
Tables
Table 1 PLC Connector Pin Out ............................................................................................................................... 12
Table 2 Power Connector Pin Out............................................................................................................................ 12
Table 3 LED Indicator Status (UV LED Head) ........................................................................................................... 13
Table 4 Environmental Conditions........................................................................................................................... 18
Table 5 UV LED Head Specifications........................................................................................................................ 18
Table 6 UV LED Warranty Status............................................................................................................................. 21

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1Introduction
The OmniCure® AC5 Series represents a new standard in UV LED curing systems. The series provides
unsurpassed levels of power, irradiance performance, control and monitoring in a compact form factor. The
OmniCure® AC5 Series systems are offered alongside a variety of power supply, controller and cabling
options, providing configuration flexibility to suit any application for end users and integrators alike.
Optical output is controlled via a PLC interface enabling a high degree of automation. At the heart of the
OmniCure® AC5 Series are the arrays of LEDs housed within the UV LED Head and located under the optical
lens providing excellent spectral and power stability. The UV LED Head has a typical lifetime in excess of
20,000 hours of accumulated 'on’ time, made possible by the integration of state-of-the-art electronics,
effective thermal management and high performance optics. Acoustic noise is minimised through an
innovative load-adaptive fan that keeps the LEDs operating efficiently and reliably while minimising the
resultant noise levels.
In the Excelitas Technologies family of UV LED light systems, all systems offer the same high level of
innovation, quality and reliability that our customers have come to expect. Since 1984, OmniCure® has
combined next generation optical engineering, state-of-the art electronics and fibre-optics to produce
sophisticated technologies that employ light. Today, OmniCure® is a leading developer of light-based systems
for sectors ranging from manufacturing to bio-medicine, and is unmatched in commitment to quality and
service.
This manual covers the following models:
Model
Part Numbers
395nm Wavelength
405nm Wavelength
AC550
019-00279R
N/A
AC575
019-00280R
019-00421R-04
AC550P
019-00281R
N/A
AC575P
019-00282R
N/A
Excelitas Technologies recommends reading this guide to discover all features of the OmniCure® AC5 Series
Systems, and how to use them.

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2Safety Precautions/ User Warnings
Glossary of Symbols:
Caution risk of danger –consult accompanying documents.
Risk Group 3 (IEC62471)
WARNING: UV emitted from this product. Avoid eye and skin exposure to unshielded product.
CAUTION: Possibly hazardous optical radiation emitted from this product. Do not stare into operating lamp.
Input/ Output Signals
Input Signal
Caution, Hot Surface
Protective Conductor Terminal
Earth (Ground) Terminal
CAUTION, Risk of Electrical Shock
Safety Precautions:
This series of cautions and warnings relate to the installation, operation and maintenance of the OmniCure®
AC5 Series system. They are also presented throughout this User Guide as applicable.
WARNING
Do not stare directly at the light emitted from the LED array. This may be harmful, resulting in eye injury.
Always use UV protective eyewear as indicated below. Additionally, protect any exposed skin with appropriate
clothing or shielding as required.
Warning UV protective eyewear must meet the following recommended optical specifications:
•Spectral range; 350-440nm
•Optical Density ≥ 6
Warning Should the OmniCure® AC5 Series System be used in a manner not specified by Excelitas
Technologies, the protection provided by the equipment may be impaired.
The UV LED Head operation can be affected if handled incorrectly. Never touch the protective lens cover
assembly of the UV LED Head. The presence of skin oils may result in a decrease in system performance.

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Always ensure the power supply unit is turned off prior to disconnecting or re-connecting the UV LED Head.
Warning:
Monitoring the system during automated operation:
The level of UV energy supplied by the OmniCure® AC5 Series is sufficient to ignite flammable substances.
Therefore, when the unit is operated unattended in an automated environment, an alarm function must be
provided by the user to indicate a malfunction in the associated equipment used. During installation the
appropriate measures must be included to prevent any such occurrence.

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3Optical Safety Data
IEC 62471: Photobiological Safety of Lamps and Lamp Systems
Resulting Classification and Labelling
Hazard
AC550/P-395
AC575/P-395
AC575-405
Actinic UV
Risk Group 3
Near UV
Risk Group 3
Blue Light
Risk Group 1
Retinal Thermal
Risk Group 2

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4Getting Started
Packaging Contents
The package contains one of the following UV LED Heads, as well as a documentation quick start:
Model
Array Curing Width
Part Numbers
395nm Wavelength
405nm Wavelength
AC550
50
019-00279R
N/A
AC575
75
019-00280R
019-00421R-04
AC550P
50
019-00281R
N/A
AC575P
75
019-00282R
N/A
The package contains an alternative 100ppi filter for applications with more airborne particulates.
Replacement air filters (qty: 10) can be ordered from Excelitas Technologies under the part number 019-
00209R.
Carefully unpack the unit and store the packing material for future use.
System Requirements
In addition to the UV LED Head, the following components are required:
•Power supply
•Power cable
Note: You will also require a PLC controller unless you are using an existing controller. The PLC controller is
used to discover the extensive functionality of the UV LED Head, but integrators can access the full
feature set through integrating with the PLC interface directly. Refer to Section 6.
These components may be sourced separately or may be purchased from Excelitas Technologies. Check with
Excelitas Technologies to determine the appropriate components for your requirements. The following table
provides the part numbers of recommended component parts, as well as a part number to order all
components as a package:
Component Parts
AC550-395nm
AC550P-395nm
AC575-395nm
AC575P-395nm
AC575-405nm
UV Head
019-00279R
019-00281R
019-00280R
019-00282R
019-00421R-04
System Controller
019-00186R
019-00186R
019-00186R
019-00186R
019-00186R
DC Power Cable
018-00559R
018-00559R
018-00559R
018-00559R
018-00559R
PLC controller
019-00214R
019-00214R
019-00214R
019-00214R
019-00214R
Connecting the Power Supply and PLC Controller
Note: All connectors are via screw style fastener -- do not over tighten the connector screws.
Note: The following is a generic procedure, illustrated with the common components described above;
please refer to specific documentation related to your power supply and controller.
Tip: After securing the power cable to the power supply, it is recommended to “tie-off” the female
connector cable on to the mounting brackets or process rigging as a form of strain relief.

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1. Make sure the power supply unit is turned off.
2. Connect the AC power cord to the power supply.
3. Attach the male end of the power cable to the power supply unit, and connect the female end of the
power cable to the UV LED Head per Figure 1.
Figure 1 UV LED Head Connection Ports
4. Connect the PLC loop-back connector to the PLC pass-through port (see Figure 2).
5. Power up the UV LED Head per Section 4.4, and then push the LED Enable button on the controller to
turn power on to the LED Head.
6. Adjust intensity using the up or down buttons to the right of the display (see Figure 2). to increase and
decrease the intensity respectively. Refer to Section 6, “Using the LED Head”
7. UV LED & Temperature faults will be indicated by an illuminated LED on the control console. To clear,
press the Clear Fault button (see Figure 2).
Figure 2 PLC Console
Power Cable
Connector
PLC
Connector

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Powering Up and Powering Down
1. Ensure that the AC5 Series system has been properly installed and the UV LED Head is securely mounted
with the optical lens in the desired orientation. Refer to Section 5, “Mounting the UV Head”.
2. Verify that the power supply unit’s AC supply cord is connected to a properly grounded AC outlet.
3. If the power supply has a circuit breaker, switch it to the “ON” position.
4. Turn the main power switch of the power supply to the “ON” position and check the fan for airflow.
5. The LED indicator on the UV LED Head will flash green during “boot-up” and change to a steady green
indicating UV LED Head is ready for use. It is recommended to wait for 15 seconds from initial power-up
before attempting to control the UV head. For more information about the indicators, see Section 7,
“Understanding the LED Indicators”.
After turning on UV power, the system will reach a fully stable operating temperature in 2-3 minutes. Caution
–the UV LED Head can become very hot, avoid handling until the UV LED Head has cooled down (approx. 5
min) or use protective gloves.
Before disconnecting any cables, power down the UV LED Head using the PLC
controller and turn off the power supply. (Note: the cooling fan may take up to 10
seconds to stop).

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5Mounting the UV Head
UV LED Head
Figure 3 UV LED Head
M
ou
nt
in
g
H
ol
es
M
ou
nt
in
g
H
ol
es
Fan Exhaust
All Models Front
AC550
Underside
Mounting
Holes
Power Cable Connector
PLC Connector
Status Indicator
Air Intake Filter
Mounting Holes
All Models Back
AC575
Underside
M
o
u
n
t
i
n
g
H
o
l
e
s
Optical lens

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Mounting the UV LED Head
**WARNING**
Do not block the air intake or the exhaust fans for the UV LED module's cooling
system. Ensure that both intake and exhaust vents located on the LED heads have
at least 2 inches (5cm) of clearance to allow sufficient air flow.
The UV LED Head includes twelve threaded mounting holes (four on the front, four on the back, and two on
each side panel) M4 X 7mm deep. Mounting holes are identical in all AC5- models
(019-00279R, 019-00280R, 019-00281R, 019-00282R) Refer to Figure 3 above.
**CAUTION**
The threaded mounting holes in the AC5- incorporate a blind configuration; ensure
that the appropriate length of mounting hardware is used. Attempting to install
over-length mounting screws could damage the threaded mounting holes and
internal components.
UV LED Head Dimensions
The UV LED Head (all models) weighs ~1.1kg (2.4lbs).
The dimensions are the same for all models of the AC5- series, except for the underside as shown in Figure 5
and Figure 6 below.
Figure 4 UV LED Head Dimensions

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Figure 5 Underside of AC550
Figure 6 Underside of AC575

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6Connecting the UV LED Head
Interfacing with the System Controller (PLC)
PLC Input Signal Requirements
Signal Type
Digital
Analog
Input
•Voltage: 0 –24V
•Current: 1 –40mA
•Voltage: 0 –5V
•Current: 500uA
Output
•Voltage: 0 –5V
•Current: 4mA (max.)
•Voltage: 0 –5V
•Current: 100uA
PLC Connector Pin-Out
Figure 7 PLC Connector (looking at UV Head)
PIN
Name
Description
1
Intensity Input
Input voltage is converted to required current to achieve desired intensity;
intensity will vary linearly between 20% and 100% for voltages between 1V
and 5V respectively.
A minimum voltage of 0.4V is required for proper light source operation. If
the user inputs a voltage below the minimum required, the light source will
not turn on.
2
Enable High
0.0V to +0.6V = Turns LEDs off (Open input will default to OFF).
+2.4V to +24.0V = ON.
3
Enable Low
0.0V to +0.6V = Turns LEDs on.
+2.4V to +24.0V = Turns LEDs off (Open input will default to OFF).
4
Thermal Fault
0.0V to +0.4V (ground) = Fault
+2.4V to +5.0V (open) = No Fault
5
IsoDGND
Ground Reference for digital IOs
6
IsoVCC
+5.0V Output.
7
Reserved
Do not connect
8
Door Lock *
0.0V to +0.6V = UV Emission Allowed.
+2.4V to +24V = UV Emission Stopped.
9
IsoGND
Ground Reference for analog IOs.
10
LED ON
0.0V to +0.4V (ground) = LED off
+2.4V to +5.0V (open) = LED on.
11
Reserved
Do not connect
12
UV LED Fault
0.0V to +0.4V (ground) = Fault
+2.4V to +5.0V (open) = No Fault

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PIN
Name
Description
13
Reserved
Do not connect
14
Clear Fault/
LED Hours
High-to-low transition clears faults; low-to-high transition initiates visual
indicator sequence of accumulated LED hours
15
Temperature
Monitor
Output is a voltage proportional to the maximum UV LED heat sink
temperature.
Conversion Factor: 0.05V/°C.
Table 1 PLC Connector Pin Out
* The integrated door lock function provides the integrator with a means of shielding operators
from accidental UV exposure by utilising a dry contact switch on the door of the UV shield and connecting
between pins 5 and 8 on the PLC interface.
Integrating Monitoring with External Circuitry
All inputs and outputs from the PLC interface are opto-isolated. The digital outputs are implemented using
NPN logic. The equivalent circuit is shown in Figure 8 below
Figure 8 PLC Digital Output Equivalent Circuit
Interfacing with the Power Cable
Figure 9 Power Connector (looking at UV Head)
PIN
Name
Description
A1,A2
+ve
48V DC power feed. A1 and A2 shorted together internally
A3,A4
-ve
48V DC power return. A3 and A4 shorted together internally
A5
Chassis
Chassis ground connection
Table 2 Power Connector Pin Out
48V Input Requirements:
•Voltage: 46-50V DC
•Current: AC550/P=8A; AC575/P=12A
Note: For safety, the AC5 Series is internally fused at 15A. This fuse is not replaceable. If it is suspected that
the internal fuse has blown, please contact Excelitas Technologies Service Centre for further assistance
and refer to Sections 0 and 11 of this manual.

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7Using the LED Head
The peak wavelength of the UV LED Head is 395nm +/- 5nm or 405nm +/- 5nm, depending on model.
For all models, adjusting the UV LED Head intensity can be actuated by an external controller via the PLC
interface. Refer to Section 6 for Pin-Outs.
Input voltage vs. desired intensity; 5V = 100% and 1V = 20%. A minimum voltage of 1V is required for light
source operation.
Note: The light source will maintain 20% intensity when the input voltage is in the range of 0.5V. If the input
voltage is below this, the light source will turn off.
Ensure the UV LED Head indicator is illuminated to a steady green before applying UV power to the head. The
UV LED Head indicator will illuminate to a steady amber indicating UV is on. When UV is off, the indicator will
revert back to a steady green indicating UV is off.
The UV LED Head is capable of responding to PLC control signals in less than 0.2 seconds.
Understanding the LED Indicators
LED Indicator
Condition
Steady green
System Ready; no critical faults
Steady amber
UV LED turned ON
Steady red
Critical fault
•Temperature Fault
•LED Fault
•System Error
Slow flashing green
(~1x/second)
POST and Initialization
Input voltage is less than 46V or greater than 50V. Unit is still
functional.
Slow flashing red
Major and critical fault
Slow flashing amber
UV LED ON with 48V input voltage out of requirement
Fast flashing green
(~3x/second)
Warranty status - operating hours is < 9,000
Fast flashing amber
Warranty status - operating hours = between 9,000 and 10,0000
Fast flashing red
Warranty status - operating hours is >10,000
Table 3 LED Indicator Status (UV LED Head)
A transition from high-to-low is required to clear the alarm signals. Use the PLC function:
Pin #
Description
I/O
Behaviour
14
Clear fault/
LED hours
In
0V to 0.6V (Open) Logic Low
2.4V to 24V Logic High
High-to-low transition = clear faults
Low-to-high transition = LED hours
Caution: Routine maintenance should only be completed by a user qualified personnel to avoid risk of injury
to the end user. No user serviceable components are located within the power supply
or UV LED Head enclosures.

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Fault Status
PLC Output
•LED Fault: At least one module fails to turn on.
•Thermal Fault that includes:
•At least one module’s temperature is over the maximum limit.
•At least one module’s temperature is lower than the minimum limit or open circuit.
•Internal Fault.
Troubleshooting
Symptoms and Possible Causes
Service to be completed by qualified Excelitas Technologies personnel only!
Always wear optical safety glasses while troubleshooting. Never put hands or
fingers in front of the lens. Serious personal injury may result.
Do not place any potentially combustible materials (e.g. paper, card, etc.) in front of
the LED Head. Risk of fire and damage to the UV LED Head may result.
If the system fails to power up:
•Make sure the AC power cord is securely plugged into a functional AC outlet and into the AC inlet on
the power supply unit.
•Make sure that the circuit breaker on the power supply unit is not tripped. If so, reset breaker.
•Make sure all cable connections (power supply to UV LED Head) are secure.
•Ensure that the power supply is switched on and the green LED indicator on the front panel is lit.
•Make sure the door lock electrical loopback on the PLC is installed properly.
If the system powers up but experiences a thermal fault during operation:
•Ensure UV Head is installed with adequate clearance around intake and exhaust ports.
•Ensure intake air filter is not clogged or obstructed.
•If filter is clogged, either clean with compressed air or replace with a new filter insert.
If the system powers up but does not emit UV:
•Check that the door lock loop is intact.
•Ensure that the voltage levels on pins 2 and 3 of the PLC interface match the logic required to enable
the LEDs.
•Check the visual indicator for signs of a fault.
If a fault condition has been detected:
•Attempt to clear the fault by toggling the voltage high on pin 14 of the PLC interface or by pressing the
“Clear Fault” button on the PLC controller.
If the system exhibits a fault condition with a slow-flashing red:
•Power-cycle the UV Head to clear.

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If the light intensity is too low:
•Make sure the input voltage is at least 46V (input voltage to the Head for the purposes of powering the
head is typically 48V (46-50V DC)).
•Out-of-range input voltage will be indicated on the visible indicator on the UV LED Head with a slow
flashing green.
•Clean the optical window of the UV LED Head as described in Section 8, “Cleaning the LED Head”.
•Verify that the intensity level of the UV LED Head is set to the correct level, using the PLC Controller.
If problems persist beyond these troubleshooting points, please contact Excelitas Technologies Service
Department (refer to Section 11, “Contact Information”).