Caen EASY3000 Technical document

Technical
Information
Manual
MOD. EASY3000/4000
EMBEDDED ASSEMBLY
POWER SUPPLY SYSTEM
MANUAL REV.5
9 September 2005
Revision n. 5
NPO:
00105/03:A1676A.MUTx/05

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.
CAEN reserves the right to change partially or entirely the contents of this Manual at any time and without
giving any notice.

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TABLE OF CONTENTS
1. EASY3000 EMBEDDED ASSEMBLY SYSTEM....................................................................................5
1.1 FUNCTIONAL DESCRIPTION.....................................................................................................................5
1.2 THE CAEN MULTICHANNEL POWER SUPPLY SYSTEM OVERVIEW ........................................................6
2. THE MOD. A1676A BRANCH CONTROLLER ....................................................................................8
2.1 A1676A BRANCH CONTROLLER OVERVIEW ..........................................................................................8
2.2 A1676A FRONT PANEL..........................................................................................................................9
2.3 A1676A TECHNICAL SPECIFICATIONS..................................................................................................10
2.3.1 A1676A Packaging......................................................................................................................................10
2.3.2 A1676A Front panel connections ................................................................................................................10
2.3.3 A1676A Front panel switches......................................................................................................................11
2.3.4 A1676A Front panel displays ......................................................................................................................11
2.3.5 Control signals ............................................................................................................................................12
2.4 A1676A COMMUNICATION TIMING......................................................................................................12
2.4.1 Foreword.....................................................................................................................................................12
2.4.2 Communication mode..................................................................................................................................12
2.4.3 Requested parameters present on EASY3000 LV and HV boards ...............................................................13
2.4.4 Timing..........................................................................................................................................................13
2.4.5 Timing examples..........................................................................................................................................13
2.5 EASY CRATE CONFIGURATION ...........................................................................................................14
2.5.1 Installation and set up .................................................................................................................................14
2.5.2 Configuring the crates.................................................................................................................................14
3. EASY3000 AND EASY4000 CRATES....................................................................................................17
3.1 EASY3000 CRATE OVERVIEW .............................................................................................................17
3.2 EASY 3000 CRATE PANEL CONNECTIONS AND DISPLAYS ....................................................................17
3.2.1 EASY 3000 crate panel second issue...........................................................................................................17
3.2.2 EASY 3000 crate panel first issue................................................................................................................18
3.2.3 EASY4000 crate overview............................................................................................................................19
3.2.4 A1676A – EASY3000/4000 CRATE connection...........................................................................................20
3.3 48 V POWER SOURCES.........................................................................................................................23
3.3.1 Mod. A3486 AC/DC Converter for Hostile Areas .......................................................................................23
3.3.2 Mod. A3484 and A3485 AC/DC Converters................................................................................................24
4. SAFETY INFORMATION AND INSTALLATION REQUIREMENTS............................................25
4.1 GENERAL SAFETY INFORMATION..........................................................................................................25

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4.1.1 Injury Precautions.......................................................................................................................................25
4.2 SAFETY TERMS AND SYMBOLS ON THE PRODUCT ................................................................................25
4.3 INSTALLATION......................................................................................................................................26
4.4 OPERATING MODES ..............................................................................................................................26
4.5 OUTPUT CONTROL AND MONITORING ...................................................................................................26
4.6 INTERLOCK OPERATION........................................................................................................................26
LIST OF FIGURES
FIG. 1.1 – SYSTEM’S BLOCK DIAGRAM...................................................................................................................6
FIG. 2.1 – MOD. A1676A BRANCH CONTROLLER FRONT PANEL ...........................................................................9
FIG. 2.2 –DSUB50 CONTROL CONNECTOR PIN ASSIGNMENT...............................................................................11
FIG. 2.3 – EASY RACK BUILDER MAIN MENU .....................................................................................................15
FIG. 2.4 – EASY RACK BUILDER WITH POPULATED RACKS.................................................................................16
FIG. 3.1 – EASY 3000 CRATE PANEL SECOND ISSUE ...........................................................................................17
FIG. 3.2 – EASY 3000 CRATE PANEL FIRST ISSUE ...............................................................................................18
FIG. 3.3 – EASY4000 CONNECTORS ...................................................................................................................20
FIG. 3.4 – CONNECTING A1676A AND THE CRATES WITH 50 WIRES CABLE.........................................................21
FIG. 3.5 – CONNECTING A1676A AND THE CRATES WITH SPLIT CABLE ...............................................................22
FIG. 3.6 – A3486 48 V POWER SOURCE FOR HOSTILE AREAS FRONT PANEL.......................................................23
FIG. 3.7 – A3485 48 V POWER SOURCE FRONT PANEL........................................................................................24
FIG. 2.2 – INTERLOCK DIAGRAM..........................................................................................................................27
LIST OF TABLES
TABLE 1.1 – EASY3000/4000 CRATES AND BOARDS HOSTILE AREAS TOLERANCES.............................................5
TABLE 1.2 – TECHNICAL SPECIFICATIONS OF THE SY 1527 MAINFRAME...............................................................7
TABLE 2.1 – A1676A CONTROL SIGNALS ...........................................................................................................12
TABLE 3.1 – EASY 3000 CRATE CONNECTIONS SECOND ISSUE ...........................................................................18
TABLE 3.2 – EASY 3000 CRATE FIRST ISSUE CONNECTIONS ...............................................................................19
TABLE 3.3 – TECHNICAL SPECIFICATIONS OF THE A3486 48 V POWER SOURCE .................................................23
TABLE 3.4 – TECHNICAL SPECIFICATIONS OF THE A3484 AND A3485 48 V POWER SOURCES............................24

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1. EASY3000 Embedded Assembly System
1.1 Functional description
EASY3000 (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 EASY3000 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 (see Table 1.1), where the EASY3000
modules provide a wide variety of output voltages to satisfy the requirements of most
detectors and front-end electronics. The control of the EASY3000 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 EASY3000 crates. The EASY3000 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 EASY3000 crate: its role is
to configure the EASY3000 channels as if they belong to the supply unit slot in which the
branch controller is located. All the channels of the EASY3000 boards will be considered
as channels of the branch controller, 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 EASY3000 crate
can be used with an air and/or water intercooler and its standard width fit the rack
mounting. Optional fan trays are available for the stand-alone operation of the EASY3000
crate when no magnetic field is present. EASY3000 is powered by external 48 V DC. The
EASY architecture foresees two independent 48 V power supplies: the first (48 V Power)
to power the channels regulators, the other (48 V Service) to power the control logic. The
use of CAEN 48 V power sources (Mod. A3484 and A3485), allows to integrate into the
channels control also the management of the 48 V power supplies. Fig. 1.1 shows the
system’s block diagram.
The EASY4000 crate is designed to house some custom PS boards that do not fit into
the EASY3000 crates; it supports mechanically up to 9 PS boards and distributes control
signals and power supplies.
Table 1.1 – EASY3000/4000 Crates and Boards hostile areas tolerances
Magnetic field: 2 kGauss
Radiation:
1·1011 p/cm2TD
2·1012 n/cm2TD
15 kRad TID

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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
EASY Module
EASY Module
48V
POWER
SOURCE
48V
SERVICE
POWER
SOURCE
BRANCH CONTROLLER
INTERRUPT
POWER FAILURE
Control Bus
Power Line
P. Service Line
48V
BACKUP
BATTERY

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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 1.2 – 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. number 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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2. The Mod. A1676A Branch Controller
2.1 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
EASY3000 and EASY4000 crates (which can work 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 EASY3000/4000 crate. It configures the
EASY3000/4000 channels as if they belong to the slot in which the branch controller is
located: the channels of the EASY3000/4000 boards operate as channels of the A1676A.
Up to six EASY3000/4000 crates can be controlled by one A1676A.
The User has to configure the A1676A to operate with His EASY crate layout by using
the provided software tool (see details in § 2.4).
The A1676A branch controller is a single width board and will be housed in one SY1527
system, while the remote sections will operate in the “hostile area”.

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2.2 A1676A Front Panel
Fig. 2.1 – Mod. A1676A Branch Controller front panel
SCALE
R
BRANCH
Mod.
V560E
Mod. A1676A
EASY
CONTROLLER
48V
+
-
0
I
N
T
E
R
L
O
C
K
1
RESET
1
1
GNDGND
1
0
5
4
102
34 5
5
4
3
2
1
0
HVCK
SYNC
DATA
REC
HVCK
SYNC
DATA
REC
HVCK
SYNC
DATA
REC
HVCK
SYNC
DATA
REC
HVCK
SYNC
DATA
REC
HVCK
SYNC
DATA
REC
GND
L
I
N
E
HEADER
CONNECTOR
DSUB
CONNECTOR
INTERLOC K
CONNECTORS 48V
CONNECTORS
RESET
BUTTON

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2.3 A1676A Technical specifications
The A1676A Branch Controller board can control up to six remote crates through the
CANbus protocol (250 kbit/sec).
Remote crates controlled by the A1676A can house different sets of EASY3000/4000
boards, then it is necessary to configure the Branch Controller firmware through a set up
file containing all the information about number, type and position of the boards in remote
crates. After the configuration it is not possible to change the crate layout unless the
A1676A configuration file is updated. The Branch Controller, in fact, scans the crates
expecting to find the sets of boards corresponding to its configuration file; if any board is
misplaced (or absent) with respect to the configuration file, then it is ignored and its
channels are signalled as “unplugged” by the SY1527: in this case it is necessary to
insert correctly the misplaced board, and then its channels will be accessed.
The User can build his crate configuration using the software tool described in § 2.4.
Control of remote crates is performed through 2 alternative output connectors (50-pin
Header male or 50-pin DSUB female) placed on the front panel of the A1676A board
(see fig. 2.1); maximum suggested cable length between A1676A and EASY crate is
150 m.
The front panel houses also six green LEDs (one per branch = remote crate); each LED
lights up / blink as the branch communications take place.
The Reset button allows to reset the internal A1676A controller; during this operation all
the remote channels continue operating with old settings. It is necessary to wait
15 seconds at least before monitoring or setting once more the remote channels.
The Interlock signal allows to shut down all the remote channels, keeping active the
communications between remote boards and SY1527.
The A1676A provides also a 48 V / 2 A supply voltage (to be used for powering the
crates) that can be enabled via the A1676A 48V parameter.
2.3.1 A1676A Packaging
The Mod. A1676A module is housed in a 5 TE-wide, 6U-high mechanics. The board
requires one SY1527 slots (single-width).
2.3.2 A1676A Front panel connections
CONTROL Connectors: 50-pin Header male / 50-pin DSUB female
48 V OUT Connector: 2 x 4 mm connectors female
INTERLOCK Connectors:2 x 4 pin Amp connectors

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134
18
235
19
336
20
437
21
538
22
639
23
740
24
841
25
942
26
1043
27
1144
28
1245
29
1346
30
1447
31
1548
32
1649
33
1750
HVCKH0
HVCKH2
HVCKL0
HVCKL2
SYNCH0
SYNCH2
SYNCL0
SYNCL2
DATAH0
DATAH2
DATAL0
DATAL2
RECH0
RECH2
RECL0
RECL2
RECL3
RECL1
GND
RECH3
RECH1
DATAL3
DATAL1
DATAH3
DATAH1
SYNCL3
SYNCL1
SYNCH3
SYNCH1
HVCH3
HVCH1
HVCL3
HVCL1
HVCKL5
HVCKH5
SYNCH5
SYNCL5
DATAH5
DATAL5
RECH5
RECL5
GND
RECL4
RECH4
DATAL4
DATAH4
SYNCL4
SYNCH4
HVCKH4
HVCKL4
Fig. 2.2 –DSUB50 Control connector pin assignment
2.3.3 A1676A Front panel switches
RESET button: Function: the A1676A is reset but HVCK and
SYNC still provided
Type: Monostable push-button
2.3.4 A1676A Front panel displays
LINE LEDs: Function: light up the when corresponding
branch communicates with A1676A.
Type: green LED.
INTERLOCK LEDs: Function: light up when the corresponding
interlock input is active.
Type: red LED.

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2.3.5 Control signals
The Branch Controller Control signals are described in the following table.
Table 2.1 – A1676A Control Signals
SIGNAL DESCRIPTION
HVCK
625 kHz synchronisation signal (one per branch) for switching parts of remote PS
channel boards; however, if this signal fails, remote boards run properly (a
synchronisation signal is generated by their controller), though lose synchronisation
between each other, and an error message (“Fail”) is returned by the SY1527. The
HVCK presence is signalled by the remote board parameter “HVSync” (Ok or Fail)
SYNC
50 Hz clock (one per branch) for the board controllers synchronisation; if this signal
fails, remote boards do not operate and an error message (“Fail”) is returned by the
SY1527. In order to remove the Fail message, it is necessary to send the “Clear
Alarm” command
DATA Communication data line
REC
Recovery / Reset lines, one for each remote EASY3000 crate; through the SY1527 it
is possible to send a command to the controllers of a remote crate either switching off
all the channels in the crate (HW Reset) or eventually leaving them on, if they were
(Recovery)
The A1676A Branch Controller allows also to use the SY1527 System front panel signals
(Kill, Interlock, Enable) on the remote channels.
2.4 A1676A Communication timing
2.4.1 Foreword
The A1676A board can handle, via the CANBUS protocol, up to 6 remote crates in
parallel (EASY bus).
The remote crates, which can be of two different kinds developed so far, EASY3000 and
EASY4000, can house respectively up to 23 and 20 nodes (EASY power supply boards,
optional Fan Units and A34xx AC/DC Converters).
2.4.2 Communication mode
A remote board is defined by its number of channels along with the type and number of
associated parameters.
Such parameters allow both to control the channel and to monitor constantly its status.

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The A1676A asks in sequence all the functional parameters of each channel of each
board. Each parameter foresees the transmission and the reception of a single CANBUS
data packet.
The parameters request takes place through cycles, from the first channel of the first
board until the last channel of the last board in the crate.
2.4.3 Requested parameters present on EASY3000 LV and HV boards
It is possible to distinguish between channel 0 parameters and other channel
parameters:
Channel Parameters
0 Temp, MainPwS, 12VPwS, 48VPwS, Sync, HVSync, RemIlk
1..n V0Set, Vmon, Vcon (LV boards only), Imon, Status, Pw
Such parameters are continuously requested by the A1676A from the remote boards
channels.
2.4.4 Timing
The average time necessary in order to update one parameter is 1.5 ms. Since the
request of the parameters takes place through cycles, the time necessary to update a
board depends thus on both the number of channels and the number of channels
parameters.
If one channel has six parameters, then 6 x 1.5 ms = 9 ms are necessary for the
complete refresh of its parameters.
Beyond the time necessary for the parameters request, a 10 ms latency between one
node’s scanning end and the beginning of the subsequent is introduced.
If more remote crates are added to the EASY bus, the time necessary for one board’s
scanning and for the parameters request, does not grows significantly, since
communications take place in parallel.
2.4.5 Timing examples
2.4.5.1 A4601H
For example we consider the A4601H board (which is housed inside the EASY4000
crate); such board is composed by two Power Supply Units (1 Unit = 1 Node) with 5
channels each. The number of parameters per channel is as follows:
ch0 7 parameters
ch1 7 parameters
ch2 7 parameters
ch3 6 parameters
ch4 6 parameters
the total number of parameters per node is thus 33; the time necessary for scanning the
A4601H is then 33 x 1.5ms x 2 = 99ms
If we have an EASY4000 crate completely filled with A4601H boards, the time necessary
for the upgrade is:

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99ms x 9 (max number of A4601H per crate) = 891 ms
plus the 10 ms latency per node: 10 ms x 9 x 2 = 180 ms
the total time is then 180 ms + 891 ms = 1071 ms
Such time does not depend on the number of active EASY bus (from 1 to 6)
2.4.5.2 A3009
For example we consider the A3009 board (which is housed inside the EASY3000 crate);
such board (1 Board = 1 Node) has 13 channels. The number of parameters per channel
is as follows:
ch0 7 parameters
ch1..12 6 parameters
the total number of parameters per node is thus 79; the time necessary for scanning the
A3009 is then 79 x 1.5 ms = 118.5 ms
If we have an EASY3000 crate completely filled with A3009 boards, the time necessary
for the upgrade is:
118.5 ms x 5 (max number of A3009 per crate) = 592.5 ms
plus the 10 ms latency per board: 10 ms x 5 = 50 ms
the total time is then 50 ms + 592.5 ms = 642.5 ms
Such time does not depend on the number of active EASY bus (from 1 to 6)
2.5 EASY Crate Configuration
CAEN EASY Rack Builder is a Java(TM) application which allows EASY Users to
create their customised EASY Crate configurations.
2.5.1 Installation and set up
First of all it is necessary to connect the PC, which must run a Java(TM) 2 Platform
Standard Edition, and must be connected to the Internet.
Now it is necessary to download the software tool from the web page:
http://www.caen.it/nuclear/product.php?mod=A1676A
Click on the Software menu and download the CaenEASYRackBuilder-x.y.zip file
Unzip the file then launch the CaenEASYRackBuilder.jar Java(TM) application
2.5.2 Configuring the crates
Now the following EASY Rack Builder window will open:

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Fig. 2.3 – EASY Rack Builder main menu
The EASY Rack Builder shows six empty EASY crates, by clicking on the “Crate button”
(see the arrow in fig. 2.3) it is possible to choose between EASY3000 and EASY4000
crates (according to the crates connected to the A1676A to be configured).
The menu on the white box on the left lists the EASY boards (including optional AC/DC
converters and Fan units) available to fill the crates.
The operating parameters of such boards are stored in the board.xml files included in the
folder:
\CaenEASYRackBuilder\Boards
Each time CAEN EASY Rack Builder is launched, such xml files are compared to those
present in the CAEN data base and, if the comparison is successful, the corresponding
boards are added in the white box list.
The updated xml files of each board can be downloaded in the software section at:
http://www.caen.it/nuclear/product.php?mod=XXXXX
where “XXXXX” stands for the board name (for example: A3009).
In order to configure the crates it is necessary to select the desired board by left clicking
on its name and dragging it on the selected crate slot. Left click again to drop.
Boards can be removed from the crates left clicking on them and dragging and dropping
them on the white box.

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Fig. 2.4 – EASY Rack Builder with populated racks
When the crate configuration is complete, it is necessary to save the file; go to:
EASY Rack Configuration > Save as…
This allow to create an xml file which can be used for future purposes (modify, update
etc.).
In order to configure the A1676A it is necessary to select:
EASY Rack Configuration > Generate Branch Controller update file
This allow to create a binary file that must be used to configure the A1676A via SY1527;
now it is necessary to connect the PC to the SY1527 System which hosts the A1676A to
be configured. The configuration procedure is described in the SY1527 User Manual,
section 7.1.19 (The UTILITY Menu: Board Upgrade; please follow the same procedure of
the firmware upgrade).

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3. EASY3000 and EASY4000 crates
3.1 EASY3000 crate overview
The EASY3000 crate is designed to house Power Supply and ADC boards of EASY3000
family; it supports mechanically EASY boards and distributes control signals and power
supplies. It is handled by one of six branches of the A1676A – Branch Controller.
3.2 EASY 3000 crate panel connections and displays
3.2.1 EASY 3000 crate panel second issue
48V IN 48V ON
48V Service
+
-
INPUT - DAISY CHAIN
48V STATUS
INPUT
48VP 48VS CAEN FAN UNIT CTR
EASY BUS
LOCAL INPUT
OUTPUT
OUTPUT
INPUT
+
-
48V Power
48V IN 48V ON
INPUT - DAISY CHAIN
EASY3000
J3 J4 J5 J6 J1 J2 PW_STATUS SV_STATUS COM3
EARTH
EARTHFAN_CTR
COM1
COM2
COM4
Fig. 3.1 – EASY 3000 crate panel second issue
Fig. 3.1 shows the EASY 3000 crate panel second issue and subesquents; for this model
the optional A3000F Fan Unit is available. The connections are explained in the following
table:

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Table 3.1 – EASY 3000 crate connections second issue
Name Description
J1,J2 48V SERVICE connectors (in parallel); input of 48 V supply for auxiliary low
voltages in boards
J3..6 48V POWER connectors (in parallel); input of 48 V supply for DC/DC
converters
F2 100 Amps fuse on 48 V POWER line
Com1..4 I/O of EASY bus for remote control
48V power/service
status1: Connectors for inputs from 48V supplies. 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
FAN_CTR Control link for fan unit (Mod. A3000F)
EARTH Earth link for the crate
3.2.2 EASY 3000 crate panel first issue
Fig. 3.2 – EASY 3000 crate panel first issue
1This feature is not yet implemented
OUTPUT INPUT
COM2 COM1
COM348V STATUS
EARTH
EASY BUS
48V Service 48V Power
-+
-+
-
-
+
+
J3
J1
J2
L2
F1
F2
J4
L1
L4
J6
J5
L3
COM1
COM2
48V STATUS
EARTH
COM3

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Fig. 3.2 shows the EASY 3000 crate panel first issue; for this model the optional A34FU
Fan Unit is available. The connections are explained in the following table:
Table 3.2 – EASY 3000 crate first issue connections
Name Description
J1,J2 48V SERVICE connectors (in parallel); input of 48 V supply for auxiliary low
voltages in boards
F1 20 Amps fuse on 48 V SERVICE line
L1 Red LED that lights up when F1 is interrupted
L2 Red LED that lights up when 48 V SERVICE is present
J3, J4, J5, J6 48V POWER connectors (in parallel); input of 48 V supply for DC/DC
converters
F2 100 Amps fuse on 48 V POWER line
L3 Red LED that lights up when F2 is interrupted
L4 Red LED that lights up when 48 V POWER is present
Com1, Com2, Com3 I/O of EASY bus for remote control
48V status2: Connectors for inputs from 48V supplies. 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
EARTH Earth link for the crate
3.2.3 EASY4000 crate overview
The EASY4000 crate is designed to house some custom PS boards that do not fit into
the EASY3000 crates; it supports mechanically up to 9 PS boards and distributes control
signals and power supplies. The crate has ten slots: slot 0 (the leftmost) is available for
test purposes, while slot 1..9 are suitable to host PS boards. The EASY4000 crate is
handled by one of six branches of the A1676A – Branch Controller. The crate panel is
provided with I/O 50 pin flat connectors of the EASY bus remote control and the 48V
Status input connector which allows the PS boards microcontrollers to detect failures in
supply voltages and consequently to enable PS channels ramping down, while service
supply voltage is provided by a back up battery; a green led signals the 48V activity. An
Earth link for the crate is available as well. For this model the optional A34FU Fan Unit is
available.
2This feature is not yet implemented

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O
U
T
P
U
T
E
A
R
T
H
I
N
P
U
T
4
8
V
S
T
A
T
U
S
OUTPUT
INPUT
48V STATUS
EARTH
48V LED
Fig. 3.3 – EASY4000 Connectors
3.2.4 A1676A – EASY3000/4000 CRATE connection
There are two different ways for connecting the A1676A Branch controller with up to six
EASY3000/4000 crates; the first type of connection uses a 50-wires flat cable between
the A1676A and the first crate as well as between the subsequent crates, as shown in
the following figure: