Caen A3486 Technical document

Technical
Information
Manual
MOD. A3486
3-PHASE 400 VAC TO
2X2 KW/1X4 KW 48 VDC
MANUAL REV. 10
8 October 2007
Revision n. 10
NPO:
00120/04:A3486.MUTx/10

CAEN will repair or replace any product within the guarantee period if the Guarantor declares that the
product is defective due to workmanship or materials and has not been caused by mishandling,
negligence on behalf of the User, accident or any abnormal conditions or operations.
CAEN declines all responsibility for damages or
injuries caused by an improper use of the Modules due
to negligence on behalf of the User. It is strongly
recommended to read thoroughly the CAEN User's
Manual before any kind of operation.
This product must be installed by qualified personnel; in order to be CE
compliant it requires 3-phase EMC filter type EPCOS B84143-A16-R105
on the mains supply cable; this filter does not support operation in
hostile areas (magnetic field).
CAEN reserves the right to change partially or entirely the contents of this Manual at any time and without
giving any notice.
Disposal of the Product
The product must never be dumped in the Municipal Waste. Please check your local
regulations for disposal of electronics products.

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TABLE OF CONTENTS
1. EASY EMBEDDED ASSEMBLY SYSTEM..............................................................................................6
1.1 FUNCTIONAL DESCRIPTION.......................................................................................................................6
1.2 THE CAEN MULTICHANNEL POWER SUPPLY SYSTEM OVERVIEW...........................................................7
1.3 THE MOD.A1676A BRANCH CONTROLLER OVERVIEW ...........................................................................9
2. A3486 3-PHASE 400VAC TO 2X2KW/1X4KW 48VDC........................................................................10
2.1 TECHNICAL DESCRIPTION.......................................................................................................................10
2.2 CHANNEL CHARACTERISTIC TABLE .......................................................................................................11
2.3 FRONT AND BACK PANEL COMPONENTS..................................................................................................12
2.4 TECHNICAL SPECIFICATIONS..................................................................................................................13
2.4.1 Packaging......................................................................................................................................................13
2.4.2 Rear panel connections, switches and displays.............................................................................................13
2.4.2.1 MAIN........................................................................................................................................................13
2.4.2.2 48V SERVICE ..........................................................................................................................................14
2.4.2.3 CHANNEL OUT± ....................................................................................................................................14
2.4.2.4 STATUS....................................................................................................................................................15
2.4.2.5 EASY BUS................................................................................................................................................16
2.4.2.6 CHASSIS EARTH....................................................................................................................................17
2.4.3 Front panel connections, switches and displays............................................................................................17
2.4.3.1 POWER.....................................................................................................................................................17
2.4.3.2 CHANNEL INTERLOCK ........................................................................................................................18
2.4.3.3 CHANNEL STATUS................................................................................................................................18
2.4.3.4 TRACKING..............................................................................................................................................19
3. SAFETY INFORMATION AND INSTALLATION REQUIREMENTS..............................................20
3.1 GENERAL SAFETY INFORMATION............................................................................................................20
3.1.1 Safety Terms and Symbols on the Product.....................................................................................................20
3.2 INJURY PRECAUTIONS ............................................................................................................................20
3.2.1 Caution..........................................................................................................................................................20
3.2.2 Grounding......................................................................................................................................................21
3.2.3 Input ratings ..................................................................................................................................................21
3.2.4 Output connectors..........................................................................................................................................21
3.2.5 Live circuits...................................................................................................................................................21
3.2.6 Parts substitutions and modifications............................................................................................................22
3.3 INSTALLATION........................................................................................................................................22

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3.3.1 General..........................................................................................................................................................22
3.3.2 Preparation for use........................................................................................................................................22
3.3.3 Initial inspection............................................................................................................................................22
3.3.4 Rack mounting...............................................................................................................................................22
3.3.5 AC source ......................................................................................................................................................23
3.3.6 3-phase power supply cable..........................................................................................................................23
3.3.6.1 Fuses..........................................................................................................................................................24
3.3.7 EASY BUS Connection ..................................................................................................................................24
3.4 MAINTENANCE.......................................................................................................................................27
4. OPERATING MODES...............................................................................................................................28
4.1 OUTPUT CONTROL AND MONITORING .....................................................................................................28
4.2 TRACKING MODE ...............................................................................................................................31
4.2.1 Internal Channel OPC Items .........................................................................................................................31
4.2.2 Output Channel OPC Items...........................................................................................................................32
LIST OF FIGURES
FIG.1.1 –SYSTEM’S BLOCK DIAGRAM .....................................................................................................................7
FIG.2.1 –MOD.A3486 AND POWER SUPPLY CABLE..............................................................................................10
FIG.2.2 –BACK PANEL LABEL...............................................................................................................................11
FIG.2.3 –A3486 FRONT AND BACK PANEL ...........................................................................................................12
FIG.2.4 –REMOTE VOLTAGE SENSING SCHEME......................................................................................................15
FIG.2.5 –48V STATUS IN SCHEME ........................................................................................................................16
FIG.2.6 –INTERLOCK DIAGRAM.............................................................................................................................18
FIG.3.1 –VENTILATION-WARNING LABEL.............................................................................................................22
FIG.3.2 –POWER SUPPLY CONNECTOR AND CABLE................................................................................................23
FIG.3.3 –BUS CONNECTION WITH A3486 MODULES..............................................................................................24
FIG.3.4 –BUS CONNECTION WITH A3486 MODULES AND EASY CRATES ..............................................................25
FIG.3.5 –BUS CONNECTION WITH A3486 MODULES,EASY CRATES AND SPLIT CABLES .......................................26
FIG.3.6 –9PIN DB-TYPE MALE CONNECTOR SIGNALS...........................................................................................26
LIST OF TABLES
TABLE 1.1 –TECHNICAL SPECIFICATIONS OF THE SY 1527 MAINFRAME..................................................................8
TABLE 2.1 –TECHNICAL SPECIFICATIONS OF THE A3486 48 VPOWER SOURCE ....................................................11
TABLE 4.1 –CH0 PARAMETERS (BOARD PARAMETERS)........................................................................................28
TABLE 4.2 –CH1..2 PARAMETERS (OUTPUT CHANNEL PARAMETERS) ...................................................................29
TABLE 4.3 –STATUS WORD SIGNIFICANT BITS........................................................................................................29

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TABLE 4.4 –INTERNAL CHANNEL ITEMS................................................................................................................31
TABLE 4.5 –OUTPUT CHANNEL ITEMS...................................................................................................................34

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1. EASY Embedded Assembly System
1.1 Functional description
EASY (Embedded Assembly SYstem) is the new CAEN power supply solution for
operation in magnetic field and radioactive environment. CAEN has been involved for
more than a decade in developing different solutions for the main LHC experiments,
where the electronic equipment of the experiment is dealing with high dose radiation and
intense magnetic field. In order to provide safe and reliable operations in such hostile
areas, CAEN started tests with rad-tolerant components and magnetic field resistant
solutions, patenting the new technology that is now used in this new line of products.
Moreover, though designed for harsh environment, the EASY modules can work also in
normal condition with excellent performance. In the new architecture, the power supply
can be located directly in the hostile area, where the EASY modules provide a wide
variety of output voltages to satisfy the requirements of most detectors and front-end
electronics. The control of the EASY power supply system is done remotely using a
Branch Controller (Mod. A1676A) plugged in a SY1527 or SY2527 mainframe located in
the control room. Each A1676A branch controller can handle up to 6 EASY crates: in this
way, one SY1527 power supply system, for example, housing up to 16 A1676A boards,
can handle up to 96 EASY systems. The EASY crate can house up to 10 boards,
depending on the boards’ width. The branch controller is the interface between the
mainframe (SY1527 or SY2527) and the remote boards in the EASY crate: its role is to
configure the EASY channels as if they belong to the supply unit slot in which the branch
controller is located. All the channels of the EASY boards will be considered as channels
of the branch control board, thus hugely increasing the number of channels the system
can handle. Through the mainframe, the provided and fully reliable OPC server permits
an immediate and “automatic” interfacing with the custom control software; moreover, a
C-library for Windows and Linux is available as well. The EASY crate can be used with
an air and/or water intercooler and its standard width fit the rack mounting. Fig. 1.1
shows the system’s block diagram.

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Fig. 1.1 – System’s block diagram
1.2 The CAEN Multichannel Power Supply System Overview
The SY1527 system is the fully equipped experiment version of a new line of power
supply systems which represent CAEN's latest proposal in the matter of High Voltage
and Low Voltage Power Supplying. This system outlines a completely new approach to
power generation and distribution by allowing the housing, in the same mainframe, of a
wide range of boards with different functions, such as High/Low Voltage boards, generic
I/O boards (temperature, pressure monitors, etc.) and branch controllers, where the latter
are used to control other remote generators and distributors. Modularity, flexibility and
reliability are the key-points of its design, enabling this module to meet the requirements
needed in a wide range of experimental conditions, which range from those of LHC
experiments, where the features of this model find prior application, to those of other less
challenging, but still demanding, High Energy Physics experiments.
The mainframe is housed in a 19"-wide, 8U-high euro-mechanics rack and hosts four
main sections:
-the Board Section, with 16 slots to house boards, distributors and branch controllers;
-the Fan Tray Section, housing 6 fans arranged on two rows;
-the Power Supply Section, which consists of the primary power supply and up to 3
power supply units;
-the CPU and Front Panel Section which includes all interface facilities.
The User Software Interface features the usual friendliness of the previous CAEN
systems which now also includes a 7.7" colour LCD. A wide choice of interface facilities
provides full communication compatibility with the previous systems and the feasibility of
controlling heterogeneous external devices. Modularity has been one of the leading
criteria in the design and development of the system: both the Power Supply Section and
the Board Section are completely modular. The Power Supply Section allows different
configurations with up to 3 power supply units per mainframe (up to 2250 W), while the
Board Section can house up to 16 boards able to fulfil different functions. A complete line
of power supply boards and distributors has been specially developed for this new
system. The minimum system configuration consists of the primary power supply, one
CONTROL
LOGIC
V+
V-
S+
S-
V+
V-
S+
S-
V+
V-
S+
S-
DC-DC
DC-DC
DC-DC
CONTROL
LOGIC
V+
V-
S+
S-
V+
V-
S+
S-
V+
V-
S+
S-
DC-DC
DC-DC
DC-DC
HOSTILE AREA
SY1527 SYSTEM MAINFRAME
CONTROL ROOM
SY1527
A3486 Module
A3486 Module
A1676A BRANCH CONTROLLER
Control Bus
3-phase 220/400 V 50/400 Hz

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Power Supply Unit and one board. The system allows also to deal with power supply
solutions composed by “branch controllers” (housed in the system main frame) and on-
detector “remote boards” (manufactured in order to be magnetic field and radiation
tolerant). Channel trip control on other crates is performed via four external differential
trip lines. A sophisticated trip handling via software allows to control and correlate trip
conditions on the channels of the crate as well as of other crates connected to it. Live
insertion and extraction of the boards, which reduces the down time of the global system,
and easy access to the computing core and peripherals of the system complete the
system flexibility. Easy interfacing is another key-point of the SY1527 system, which can
be connected to SY127 and SY527 systems. The Ethernet interface (TCP/IP) allows both
an easy Telnet access and the connection via OPC Server to a SCADA control system.
Enhanced software programming features a unified command set independent from the
interface used to communicate with the system. The Power Supply Section and Board
Section can be externally synchronised via front panel connectors. Multi-layered access
to the system via Intranet is foreseen through the management of several custom user
profiles. In particular, three different access levels have been implemented: Guest, User
and Administrator, each of which with password protection. Handy maintenance and
upgrading, which constitute a major issue in the reliability of a system, are further
guaranteed by the possibility of accessing and servicing the system via network facilities.
Actually, the Telnet access facility allows remote debugging and technical support of the
system, including future firmware upgrading. For a detailed description of the SY 1527
Universal Multichannel Power Supply System please refer to the SY 1527 User's Manual.
Table 1.1 – Technical specifications of the SY 1527 mainframe
Packaging - 19"-wide, 8U-high Euro-mechanics rack;
- Depth: 720 mm.
Weight -Mainframe (*): 24 kg
-Mod. A1532: 3.2 kg
Power requirements
Voltage range: 100/230 V
Frequency: 50/60 Hz
Power: 3400 W
Max. number of boards per crate 16
Max. nr. of power supply units per crate
3
Primary power supply output (Mod.
A 1531) ±12 V, 8 A
+5 V, 20 A
Power supply unit output (Mod. A 1532) +48 V, 15.6 A
Max. output power 2250 W
Operating temperature From 0°C (dry atmosphere) to +40°C
Storage temperature From -20°C (dry atmosphere) to +50°C
(*) One Primary Power Supply (Mod. A 1531) and one Power Supply Unit (Mod. A 1532) are
included; boards are not included.

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1.3 The Mod. A1676A Branch Controller overview
The Mod. A1676A EASY Branch Controller is implemented in a single width
SY1527/SY2527 board. Once plugged in, the Branch Controller must be linked to the
EASY crates (placed in the “hostile area”), via front panel connectors (Control and Power
Supply). The A1676A is the interface between the mainframe and the remote boards in
the EASY crate. It configures the EASY channels as if they belong to the slot in which the
branch controller is located: the channels of the EASY boards operate as channels of the
A1676A. Up to six EASY crates can be controlled by one A1676A. The provided software
tool allows the User to configure the A1676A to operate with any EASY crate layout.

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2. A3486 3-Phase 400Vac to 2X2kW/1X4kW 48Vdc
2.1 Technical description
Fig. 2.1 – Mod. A3486 and Power Supply cable
The CAEN Mod. A3486 is a two channel 400 Vac – 48 Vdc converter, which allows to
integrate into the EASY channels control also the management of the 48 V power
supplies. Each channel provides a 2 kW output and can be tracked in order to obtain one
4 kW output. This module is designed to work as main converter in LHC hostile areas,
thus completing the EASY system. Features include local or remote control, overload
protection and local or remote inhibit function.
The module front panel houses LEDs and channels monitor signals. The channel outputs
are provided through Anderson Power single pin connectors.
Mod. A3486S, with power supply and link connection on the front panel, is also available.

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2.2 Channel Characteristic Table
Table 2.1 – Technical specifications of the A3486 48 V Power Source
Packaging 19"-wide, 3U-high Euro-mechanics rack;
Depth: 50 cm.
Polarity positive
AC input 3-phase 400 V / 50 Hz (see label below)
DC input 2A @ 48V (see label below)
Output Voltage 44 ÷ 52 V adjustable via software
Max. Output Power
4000 W
Max. Input Power 5000 W
Voltage Ripple <100mVpp measured on 10Hz to 20MHz bandwidth
Voltage Monitor vs. Output Voltage Accuracy: max. ±0.5%
Voltage Set vs. Output Voltage Accuracy: max. ±0.5%
Current Monitor vs. Output Current Accuracy: ± 1A ± 2% of reading
Current Set vs. Output Current Accuracy: ± 1A ± 2% of setting
Fig. 2.2 – Back Panel Label

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2.3 Front and back panel components
Fig. 2.3 – A3486 Front and Back Panel

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2.4 Technical Specifications
2.4.1 Packaging
The module is housed in a 3U 19” Euro Rack, 50 cm deep.
2.4.2 Rear panel connections, switches and displays
The Module rear panel houses the following components:
2.4.2.1 MAIN
This section provides the connections for the mains power supply and includes:
1 3-phase (400 Vac) connector Harting HAN Q 7/0 female insert 09.12.007.3101;
configuration pin: Harting HAN Q 7/0 female coding pin 09.12.000.9901;
case: Harting HAN Bulkhead mounting code 09.20.003.0301;
male pin contact: Harting 09.33.000.6102
1 3-phase switch
WARNING: HIGH LEAKAGE CURRENT; EARTH
CONNECTION ESSENTIAL BEFORE CONNECTING SUPPLY
INTERNAL MAINS POWER SUPPLY FUSES; SEE § ERRORE.
L'ORIGINE RIFERIMENTO NON È STATA TROVATA. FOR
REPLACEMENT INSTRUCTIONS
WARNING: NO EFFECT MIGHT BE DETECTED IF ONE FUSE
IS BLOWN; IN FACT IN SUCH CASE THE MODULE
CONTINUES TO OPERATE WITH 2 PHASES, BUT THIS
OPERATING MODE IS NOT OPTIMAL: CURRENTS ON
OTHER PHASES AND OUTPUT RIPPLE INCREASE

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2.4.2.2 48V SERVICE
This section provides the input of 48 V supply for auxiliary low voltages and includes:
2 APP30 1317G4 type connectors (OR’ed); mates with APP PP45, contact: 269G3,
body: 1327 (red) / 1327G6 (black), pad: 2399G8
1 2A Fuse
2 Red LEDs (48 V IN and 48V OK)
48 V IN LED lights up as the external 48V is present on the input; 48V OK LED lights up
as the 48V is available for the internal electronics.
2.4.2.3 CHANNEL OUT±
This section provides the channels output and includes:
2 APP PC5933T type connectors (channels output); mates with APP PP75, contact:
5900, body: 5916G7 (red) / PP75 5916G4 (black)

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2 AMP 280372-2 type connectors (sense)
1 Distrelec 10 05 24 connector
2 red LEDs (channel ON)
WARNING: THESE TERMINALS DELIVER HIGH ENERGY (42A @ 48V
EACH); ABSOLUTELY DO NOT SHORT THEM WHEN CABLE CONNECTORS ARE
NOT PLUGGED, IN ORDER TO AVOID BIG SPARKS
NEGATIVE TERMINALS OF OUT CONNECTORS ARE INTERNALLY
CONNECTED TO PROTECTION EARTH TERMINAL, PROVIDED BY MAINS POWER
SUPPLY PLUG
The channels output connectors provide the 48V output. The Sense lines are used to
compensate for the voltage drop over the cable. Voltage is monitored directly at the load
by an high input impedance differential amplifier through the sense wires; the voltage
sensing circuit is schematically illustrated in the figure below.
Rcable
L
O
A
D
VMON
10KΩ
Rcable
OUT
-
OUT
+
S +
S -
10KΩ
Fig. 2.4 – Remote voltage sensing scheme
When the sense wires are connected to the load (pin 2 = S- and pin 3 = S+ of the four-
pin sense connector on back panel), the Vset value equals the voltage on the load; if the
sense wires are not connected (to the load), Vset will equal the voltage on the connector.
If sense wires will not be used, then is necessary to short circuit pin 1 = Out- with pin 2
= S- and pin 3 = S+ with pin 4 = Out+.
2.4.2.4 STATUS
This section provides the Status line for failure detection and includes:
1 Input AMP 280372-2 type connector
1 Output AMP 280372-2 type connector

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Through this input the remote EASY board microcontroller can detect failures in supply
voltages and consequently enables PS channels ramping down, while service supply
voltage is provided by a back up battery.
The status input circuit is described in the following figure:
P4
P3
P1
P2
330 Ohm
~10 mA IN OUT
S
T
A
T
U
S
Pin1
Pin2
Pin3
Pin4
Fig. 2.5 – 48V Status IN scheme
It can work in two ways:
PASSIVE OPERATION: it is necessary to short circuit pin 1 (the 1st from bottom to top)
with pin 2 (the 2nd from bottom to top), and pin 3 (the 3rd from bottom to top) with pin 4
(the 4th from bottom to top).
ACTIVE OPERATION: it is necessary to send a voltage level (for example a TTL; the
recommended current is about 10 mA) between pin 2 and pin 3 (high = STATUS OK; low
= STATUS FAIL ), leaving pin 1 and pin 4 disconnected.
The output connector allows to pass the Status information to other converters and
crates: it can be connected with the STATUS connector of EASY3000 crates and
provides the following information:
STATUS OK = Both A3486 Channels ON
STATUS FAIL = At least one of A3486 Channels OFF
2.4.2.5 EASY BUS
This section provides the link for the module connection with the A1676A and the
EASY3000 crates and includes:

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2 INPUT internally wired 50 Pin flat male connectors
2 OUT internally wired 50 Pin flat male connectors
1 Local Input 9 Pin DB-type male connector (to be used with split cables, see A1676A
User’s Manual)
1 Termination switch (see figures for termination usage)
2.4.2.6 CHASSIS EARTH
This section provides the Earth auxiliary reference and includes:
1 Earth RADIALL R921921 type connector
WARNING: ALTHOUGH THE CHASSIS IS ALREADY INTERNALLY
CONNECTED TO PROTECTION EARTH PROVIDED BY MAINS POWER SUPPLY
PLUG, CAEN STRONGLY ADVICES TO CONNECT THIS TERMINAL TO A GOOD
EARTH WITH A LOW IMPEDANCE CABLE PATH, IN ORDER TO IMPROVE EMI
SHIELDING AND SAFETY.
THIS TERMINAL IS IN ITS TURN INTERNALLY CONNECTED TO PROTECTION
EARTH.
2.4.3 Front panel connections, switches and displays
The Module front panel houses the following components:
2.4.3.1 POWER
This section allows to turn the module ON/OFF and includes:
1 LEMO 00 connector (ENABLE)
1 Bistable switch (ON/OFF)
1 green LED (COMM)
The module can be turned ON (enabled) only if a 50 Ohm termination is inserted in the
Enable LEMO 00 connector.
The ON/OFF switch allows to enable/disable the power supply (general ON/OFF of the
module) when the 48V Service is active.
The COMM LED lights up as the communications with the A1676A take place.

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2.4.3.2 CHANNEL INTERLOCK
This section allows to enable/disable the module output and includes:
1 AMP 280372-2 type connector
1 Bistable switch (ENABLE/DISABLE)
1 red LED
In order to enable the output channel the switch must be set on “ENABLE”, then the
Interlock can work in two ways:
PASSIVE OPERATION: it is necessary to short circuit pin 1 (“GND”, the first from left to
right) with pin 2 (“K=katode”), and pin 3 (“A=anode”) with pin 4 (“VCC”).
ACTIVE OPERATION: it is necessary to send a voltage level (for example a TTL; the
recommended current is about 10 mA) between pin 2 = katode and pin 3 = anode (high =
interlock disabled, the channel can be turned on; low = interlock enabled, the channel
cannot be turned on), leaving pin 1 and pin 4 disconnected.
The LED is ON when the Board is enabled.
GND
K
VCC
A
330 Ohm
~10 mA
Fig. 2.6 – Interlock diagram
2.4.3.3 CHANNEL STATUS
This section includes four LEDs:
ON LED (red): lights up as the channel is on.

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INT. FAIL LED (red): lights up in case of internal power supply failures. After the Internal
Fail cause is removed, the LED remains on, unless a “Clear Alarm” is performed.
OVC LED (red): lights up as the channel is in overcurrent (Imon = Iset/Imax hardware).
After the Overcurrent cause is removed, the LED remains on, unless a “Clear Alarm” is
performed.
MAX DROP LED (red): lights up as the maximum allowed voltage drop is exceeded; i.e.:
when Sense Wires are used and the detected drop is larger than 6 V, the channel is
turned off automatically since it is not possible to recover it.
After the Maximum Drop cause is removed, the LED remains on, unless a “Clear Alarm”
is performed.
2.4.3.4 TRACKING
This section allows to track the channels and includes:
1 Slide switch (Parallel/Independent)
1 green LED
Channels can be tracked in order to obtain one 4 kW output: for this purpose it is
necessary to:
-turn the module off
-remove the screw-lock protection cap
-set the tracking switch on the “Parallel” position
-connect the output cables in parallel on the load
-connect the sense wires (if used, see § 2.4.2.3); only one pair is required
-install the screw-lock protection cap
-turn the module on
When the channels are tracked, the channels settings (see § 4.1) act on both channels;
in particular: if one channel is disabled via Interlock, neither the other is active; Vset/Iset
must be programmed on Output Channel 0, their value is copied on Output Channel 1
automatically. The green LED lights up as the channels are tracked.

Document type: Title: Revision date: Revision:
User's Manual (MUT) A3486 3Phase 400Vac to 2x2kW/1x4kW 48Vdc 08/10/2007 10
NPO: Filename: Number of pages: Page:
00120/04:A3486.MUTx/10 A3486_REV10.DOC 35 20
3. Safety information and installation requirements
3.1 General safety information
This section contains the fundamental safety rules for the installation and operation of the
boards. Read thoroughly this section before starting any procedure of installation or
operation of the product.
3.1.1 Safety Terms and Symbols on the Product
These terms may appear on the product:
•DANGER indicates an injury hazard immediately accessible as you read the
marking.
•WARNING indicates an injury hazard not immediately accessible as you read the
marking.
•CAUTION indicates a hazard to property including the product.
The following symbols may appear on the product:
DANGER ATTENTION
High Voltage
Protective Ground
Conductor Terminal
must be connected to
Earth Ground. Refer to Manual
3.2 Injury Precautions
Review the following precautions to avoid injury and prevent damage to this product or
any products connected to it. To avoid potential hazards, use the product only as
specified. Only qualified personnel should perform service procedures.
3.2.1 Caution
The following safety precaution must be observed during all phases of operation, service
and repair of this equipment. Failure to comply with the safety precautions or warnings in
this document violates safety standards of design, manufacture and intended use of this
equipment and may impair the built-in protections within.
CAEN shall not be liable for user’s failure to comply with these requirements.
To avoid electric shock or fire hazard, do not apply a voltage to a load that is outside the
range specified for that load.
To avoid electric shock or fire hazard, do not operate this product with covers or panels
removed.
Do Not Operate Without Covers.
To avoid electric shock or fire hazard, do not operate this product with covers or panels
removed.