Caen SY 2527 User manual

User's
Manual
MOD. SY 2527
27 November 2000
Revision n. 0
UNIVERSAL MULTICHANNEL
POWER SUPPLY SYSTEM
USER’S MANUAL
NPO:
00103/97:2527y.MUTx/00

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TABLE OF CONTENTS
1. ABOUT THIS MANUAL ...................................................................................................................... 7
1.1 ORGANISATION.................................................................................................................................. 8
1.2 CONVENTIONS................................................................................................................................... 9
1.2.1 Safety rules............................................................................................................................... 9
1.2.2 Electrical signal specifications ................................................................................................. 9
2. GENERAL DESCRIPTION OF THE SYSTEM................................................................................ 10
2.1 OVERVIEW ...................................................................................................................................... 10
2.2 SHORT FUNCTIONAL DESCRIPTION.................................................................................................... 12
2.3 TECHNICAL SPECIFICATION TABLES .................................................................................................. 15
3. SAFETY INFORMATION AND OPERATION REQUIREMENTS ................................................ 18
3.1 GENERAL INFORMATION................................................................................................................... 18
3.1.1 Injury Precautions .................................................................................................................. 18
3.1.2 Product Damage Precautions.................................................................................................. 19
3.1.3 EC Certifications and Compliance.......................................................................................... 19
3.1.4 Terms in this Manual .............................................................................................................. 19
3.2 SAFETY TERMS AND SYMBOLS ON THE PRODUCT .............................................................................. 19
3.3 GENERAL OPERATION REQUIREMENTS.............................................................................................. 20
4. SYSTEM AND CHANNEL CONTROL............................................................................................. 21
4.1 INTRODUCTION................................................................................................................................ 21
4.2 SYSTEM CONTROL ........................................................................................................................... 21
4.2.1 NIM / TTL standard selection.................................................................................................. 22
4.2.2 LOCAL/REMOTE Power-On................................................................................................... 22
4.2.3 LOCAL/REMOTE Channel Enable ......................................................................................... 22
4.2.4 VSEL command....................................................................................................................... 23
4.2.5 ISEL command........................................................................................................................ 23
4.2.6 KILL command ....................................................................................................................... 23
4.2.7 RESET command .................................................................................................................... 23
4.2.8 INTERLOCK command........................................................................................................... 24
4.2.9 HV SYNC................................................................................................................................ 25
4.3 SYSTEM STATUS MONITORING .......................................................................................................... 25
4.3.1 Over Current .......................................................................................................................... 25
4.3.2 Under Voltage......................................................................................................................... 26
4.3.3 Over Voltage........................................................................................................................... 26
4.3.4 Trip......................................................................................................................................... 26
4.3.5 Reset flag................................................................................................................................ 26
4.3.6 Check passed.......................................................................................................................... 26
4.3.7 GEN........................................................................................................................................ 27
4.3.8 CH-ON ................................................................................................................................... 27

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4.3.9 Over Temperature...................................................................................................................27
4.3.10 Fan Failure............................................................................................................................. 27
4.3.11 Pwr Failure.............................................................................................................................27
4.4 CHANNEL PARAMETERS ...................................................................................................................28
4.4.1 CHANNEL NUMBER (CH #).................................................................................................. 28
4.4.2 CHANNEL NAME (CHANNEL) .............................................................................................29
4.4.3 VMAX HARDWARE (HVMAX)..............................................................................................29
4.4.4 VMAX SOFTWARE (SVMAX)................................................................................................29
4.4.5 V0SET..................................................................................................................................... 29
4.4.6 I0SET...................................................................................................................................... 29
4.4.7 V1SET..................................................................................................................................... 30
4.4.8 I1SET...................................................................................................................................... 30
4.4.9 RAMP-UP (RUp) ....................................................................................................................30
4.4.10 RAMP-DOWN (RDwn)............................................................................................................30
4.4.11 VMON.....................................................................................................................................30
4.4.12 IMON......................................................................................................................................31
4.4.13 TRIP .......................................................................................................................................31
4.4.14 POWER (PW) .........................................................................................................................31
4.4.15 POWER-ON (POn).................................................................................................................. 32
4.4.16 POWER-DOWN (PDwn).........................................................................................................32
4.5 CHANNEL STATUS ............................................................................................................................ 32
4.6 BOARD STATUS................................................................................................................................33
5. SYSTEM POWER-ON ........................................................................................................................34
5.1 PRELIMINARY CHECK .......................................................................................................................34
5.2 LOCAL POWER-ON...........................................................................................................................34
5.3 REMOTE POWER-ON........................................................................................................................35
6. CONFIGURING THE INTERFACES................................................................................................36
6.1 RS232 INTERFACE ...........................................................................................................................36
6.2 ETHERNET INTERFACE (TCP/IP PROTOCOL)......................................................................................37
6.2.1 Configuring the SY 2527 System for network connection.........................................................37
6.2.2 Configuring the host PC..........................................................................................................37
6.2.3 Verifying connection ...............................................................................................................38
6.3 H.S. CAENET INTERFACE...............................................................................................................39
7. OPERATING MODES.........................................................................................................................40
7.1 STANDALONE OPERATION.................................................................................................................40
7.1.1 Local Control Devices.............................................................................................................41
7.1.2 Software Version.....................................................................................................................42
7.1.3 Menu Structure .......................................................................................................................43
7.1.4 Welcome Window....................................................................................................................44
7.1.5 Login Window......................................................................................................................... 44
7.1.6 Start Up Window.....................................................................................................................45
7.1.7 The - Menu: About .................................................................................................................. 47
7.1.8 The - Menu: Session................................................................................................................48
7.1.9 The MAIN Menu: Channels..................................................................................................... 49
7.1.10 The MAIN Menu: Crate Map................................................................................................... 54
7.1.11 The MAIN Menu: Connect.......................................................................................................55

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7.1.12 The MAIN Menu: Logout ........................................................................................................ 55
7.1.13 The GROUPS Menu and relevant commands .......................................................................... 55
7.1.14 The VIEW Menu and relevant commands................................................................................ 58
7.1.15 The UTILITY Menu: Kill......................................................................................................... 58
7.1.16 The UTILITY Menu: Clear Alarm............................................................................................ 59
7.1.17 The UTILITY Menu: Status ..................................................................................................... 60
7.1.18 The UTILITY Menu: Trip Handling......................................................................................... 61
7.1.19 The UTILITY Menu: Format ................................................................................................... 61
7.1.20 The UTILITY Menu: Board Upgrade....................................................................................... 62
7.1.21 The UTILITY Menu: System Upgrade...................................................................................... 65
7.1.22 The SETUP Menu: Reset Flag................................................................................................. 66
7.1.23 The SETUP Menu: Communications....................................................................................... 68
7.1.24 The SETUP Menu: Security .................................................................................................... 68
7.1.25 The SETUP Menu: Log Options.............................................................................................. 68
7.1.26 The SETUP Menu: Tech Info .................................................................................................. 69
7.1.27 The SETUP Menu: HV Clock Conf.......................................................................................... 69
7.2 REMOTE OPERATION VIA TERMINAL.................................................................................................. 70
7.2.1 Using the RS232 interface....................................................................................................... 71
7.2.2 Using the H.S. CAENET (Multicrate Operation)..................................................................... 71
7.2.3 Using the TCP/IP protocol via Ethernet (Telnet Client) .......................................................... 73
7.3 REMOTE OPERATION VIA WEB BROWSER........................................................................................... 74
7.4 REMOTE OPERATION VIA HOST COMPUTER........................................................................................ 75
8. TRIP HANDLING ............................................................................................................................... 77
9. ERROR HANDLING........................................................................................................................... 78
10. SECURE ACCESS AND USER’S PROFILE MANAGEMENT.................................................... 79
10.1 MULTILEVEL LOGIN PROFILE ENVIRONMENT...................................................................................... 79
10.1.1 Guest profile........................................................................................................................... 80
10.1.2 User profile............................................................................................................................. 81
10.1.3 Administrator profile .............................................................................................................. 81
10.2 GENERAL SETTINGS FOR PASSWORD PROTECTION .............................................................................. 81
10.3 ASSIGNING A LOGIN PROFILE ............................................................................................................ 81
10.4 CUSTOMISING THE ENVIRONMENT .................................................................................................... 81
11. SYSTEM DIAGNOSTIC PROCEDURES...................................................................................... 82
APPENDIX A............................................................................................................................................... 83
SY2527 SYSTEM FRONT PANEL................................................................................................................... 84

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LIST OF FIGURES
FIG. 2.1 – LAYOUT OF THE MAIN MECHANICAL SECTIONS OF THE SY2527 MAINFRAME.......................................10
FIG. 2.2 – BLOCK DIAGRAM OF THE FUNCTIONAL PARTS OF THE SY2527 SYSTEM...............................................14
FIG.4.1 – RESET TIMING...............................................................................................................................24
FIG. 4.2 – COMPLETE CHANNEL ADDRESS........................................................................................................28
FIG. 5.1 – REMOTE IN-OUT CONNECTORS.......................................................................................................35
FIG. 6.1 – RS232 CONNECTOR PIN ASSIGNMENT...............................................................................................36
FIG. 6.2 - THE RESULT OF A SUCCESSFUL "PING" TO THE SY 2527 SYSTEM .......................................................38
FIG. 7.1 – STANDALONE OPERATION ...............................................................................................................40
FIG. 7.2 – MENU STRUCTURE IN STANDALONE OPERATION................................................................................43
FIG. 7.3 – WELCOME SCREEN IN STANDALONE OPERATION ..............................................................................44
FIG. 7.4 – LOGIN WINDOW..............................................................................................................................45
FIG. 7.5 – START UP WINDOW.........................................................................................................................46
FIG. 7.6 – ABOUT WINDOW............................................................................................................................. 47
FIG. 7.7 – SESSION WINDOW...........................................................................................................................48
FIG. 7.8 – CHANNELS WINDOW....................................................................................................................... 49
FIG. 7.9 – CRATE MAP WINDOW .....................................................................................................................54
FIG. 7.10 – CONNECT WINDOW....................................................................................................................... 55
FIG. 7.11 – ADD CHANNELS POP-UP WINDOW ..................................................................................................56
FIG. 7.12 – REMOVE CHANNELS POP-UP WINDOW ............................................................................................57
FIG. 7.13 – GROUP MODE WINDOW .................................................................................................................58
FIG. 7.14 – KILL POP-UP WINDOW...................................................................................................................59
FIG. 7.15 – CLEAR ALARM POP-UP WINDOW ....................................................................................................60
FIG. 7.16 – STATUS POP-UP WINDOW............................................................................................................... 61
FIG. 7.17 – FORMAT POP-UP WINDOW..............................................................................................................62
FIG. 7.18 – BOARD UPGRADE POP-UP WINDOW ................................................................................................64
FIG. 7.19 – SYSTEM UPGRADE POP-UP WINDOW...............................................................................................66
FIG. 7.20 – RESET FLAG POP-UP WINDOW........................................................................................................67
FIG. 7.21 – TECH INFO POP-UP WINDOW.......................................................................................................... 69
FIG. 7.22 – REMOTE OPERATION VIA TERMINAL............................................................................................... 70
FIG. 7.23 – WELCOME SCREEN IN TERMINAL OPERATION.................................................................................71
FIG. 7.24 – REMOTE OPERATION VIA HOST COMPUTER....................................................................................75
FIG. 7.25 – SOFTWARE ARCHITECTURE ............................................................................................................76

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LIST OF TABLES
TABLE 2.1 - TECHNICAL SPECIFICATIONS OF THE SY2527 MAINFRAME: GENERAL.............................................. 15
TABLE 2.2 - TECHNICAL SPECIFICATIONS OF THE SY2527 MAINFRAME: FRONT AND REAR PANEL COMPONENTS .. 16
TABLE 2.3 - TECHNICAL SPECIFICATIONS OF THE SY2527 MAINFRAME: INPUT AND OUTPUT SIGNALS.................. 17
TABLE 6.1 – RS232 PORT DEFAULT SETTINGS................................................................................................. 36
TABLE 6.2 – TCP/IP PROTOCOL DEFAULT SETTINGS ....................................................................................... 37
TABLE 6.3 – AN EXAMPLE OF TCP/IP PROTOCOL SETTINGS............................................................................. 37
TABLE 6.4 – H.S. CAENET DEFAULT SETTINGS............................................................................................. 39
TABLE 7.1 – LOCAL CONTROL COMMANDS AND EXTERNAL KEYBOARD COMMANDS............................................ 42
TABLE 10.1 – OPERATIONS ALLOWED IN A GUEST, USER AND ADMINISTRATOR LOGIN SESSION.......................... 80

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1. About this manual
The purpose of this guide is to illustrate:
•the several parameters and commands available for the control and status
monitoring of the SY2527 Universal Multichannel Power Supply System and of
the board channels,
•the requirements and instructions for its correct operation in different hardware
configurations,
•the User Software Interface used to control the system interactively.
The preliminary section of the guide starts with a short description of the SY2527 system
with a summary of its main features and performances.
The core of the guide consists of two sections:
a reference section with a detailed description of the commands, alarms and parameters
which allow for the control and monitoring of the system and of the board channels;
a second section which illustrates the operating modes of the SY2527 system for
different hardware configurations for interactive control of the system, paying particular
attention to the User Software Interface for standalone and terminal operation.
A detailed description of all hardware components and system installation instructions
can be found in the Hardware Installation Guide.

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1.1 Organisation
This guide is organised as follows:
Chapter 1 – About this manual: it shortly describes the objectives and organisation of
this guide;
Chapter 2 – General description of the system: it contains an overview of the system and
its main features, a short functional description and some reference tables with a
summary of the system technical specifications;
Chapter 3 – Safety information and operation requirements: it contains general safety
rules and the requirements for a correct system operation;
Chapter 4 – System and channel control: this reference section contains the description
of all commands, parameters and alarms to control and monitor the status of the system
and of the board channels;
Chapter 5 – System Power-On: it contains the procedure for the power-on of the system
together with a first check of its correct operation;
Chapter 6 – Configuring the interfaces: it contains the procedure for the correct software
configuration of the interfaces for the system remote control;
Chapter 7 – Operating modes: this is the guide core which contains the instructions to
operate the system in different hardware configurations: in particular, the User Software
Interface used in standalone operation and in remote operation via terminal are fully
described;
Chapter 8 – Trip handling: it contains further details about how to handle trip conditions;
Chapter 9 – Error handling: it contains further details about how to handle error
conditions;
Chapter 10 – Secure access and user’s profile management: this section has been
conceived for system administrators in order to allow for secure management of the
system.
Chapter 11 – System diagnostic procedures: a reference section containing some
diagnostic procedures to test system correct operation;
Appendix A – Front Panel of the SY2527 system: a useful reference figure of the
SY2527 Front Panel.

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1.2 Conventions
The conventions adopted all through the manual are shortly listed in the following.
1.2.1 Safety rules
The user is requested to pay particular attention to the parts of the document containing
the following terms:
WARNING:
Warning statements identify conditions or practices that could result in injury or
loss of life.
CAUTION:
Caution statements identify conditions or practices that could result in damage to
this product or other property.
Please pay particular attention to the grey areas where warning and caution statements
are emphasised, as shown in the following examples:
CAUTION
PLEASE NOTE THAT THE FAN TRAY GRID MUST
NOT BE COVERED UNDER ANY CIRCUMSTANCES!
WARNING
DO NOT OPERATE WITHOUT COVERS!
1.2.2 Electrical signal specifications
The polarity of the electrical signals can be chosen via software by the user. As a
consequence, in this guide it has been adopted the following convention:
TRUE: an electrical signal is indicated as TRUE when it is active.
FALSE: an electrical signal is indicated as FALSE when it is not active.

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2. General description of the system
This preliminary section contains a short description of the SY2527 system with a
summary of its features and some tables with its main technical specifications.
A detailed description of technical specifications and hardware installation instructions
can be found in the Hardware Installation Guide.
2.1 Overview
The SY2527 system is the small scale experiment version of the latest CAEN
UNIVERSAL MULTICHANNEL POWER SUPPLY SYSTEM. This system outlines a
completely new approach to power generation and distribution by allowing to house, in
the same mainframe, 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 it to meet
the requirements of a wide range of experimental conditions. The latter range from those
of LHC experiments, in which the system’s features find prior application, to those of
other less challenging, but still demanding, High Energy Physics experiments.
The SY2527 mainframe is housed in a 19"-wide, 4U-high euro-mechanics rack and hosts
three main sections (refer to Fig. 2.1):
•the Boards Section, with 6 slots to house boards, distributors and branch controllers;
•the Power Supply Section
•the CPU and Front Panel Section which includes all interface facilities.
123
41 5 6
789
.0-
CM
DDEL AC K
Boards
Section
Power Supply
Section
CPU &
Front Panel
Section
Fig. 2.1– Layout of the main mechanical sections of the SY2527 mainframe

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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 interfaces provides
full communication compatibility with the previous systems and the possibility of
controlling heterogeneous external devices.
The Board Section can house up to 6 boards able to fulfil different functions. A new line
of boards and distributors, analogous with those available for the SY527 system, and a
set of branch controllers has been specially developed for this new system.
The concept of modularity has been extended up to the possibility of arranging ‘clusters’
constituted by one ‘intelligent’ SY2527 system able to drive other ‘non
systems, i.e. systems without CPU (to be implemented). The connections among the
systems constituting the cluster are realised through a new CAEN interface, the Local
Net.
The extreme flexibility of the system, which allows to house indifferently, inside the
same mainframe, boards with different functions, is further enhanced by the possibility of
developing ad-hoc boards and even complete custom peripheral systems, including their
hardware. The latter, actually, can be designed specifically for on-detector installation.
All the custom electronics can be anyway controlled by single boards which are inserted
in the SY2527 mainframe and act as branch controllers.
Fast, accurate set-up and monitoring of up to 1024 parameters (14-bit resolution on
Voltages and Currents with standard boards) is available for each branch controller
thanks to the use of one microprocessor per slot. All the operational parameters are
stored in a non-volatile memory (EEPROM) to be still available after Power-Off. The
parameters can be controlled either via CAEN traditional built-in links (RS232,
H.S. CAENET) or via CERN-approved Fieldbuses or via Ethernet (TCP/IP).
Programmable handling of parameters and errors is available as well.
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 completes
the system flexibility.
Easy interfacing is another key-point of the SY2527 system. Thanks to the
H.S. CAENET interface, the system ensures full communication compatibility with the
previous models. Besides the RS232 and Ethernet (TCP/IP) interfaces provided with the
standard version of the system, CAN-bus can be furnished on request, as well as special
boards featuring optical links for remote communications. The Power Supply Section
and Board Section can be externally synchronised via front panel connectors.
Secure access to the system via Intranet is foreseen together with a multilevel
management of custom user's 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, Telnet and WWW access facilities allow remote
debugging and technical support of the system, including future firmware upgrading.

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2.2 Short Functional description
A block diagram of the SY2527 system is shown in Fig. 2.2, p.14.
A single crate can host up to 6 Channel Boards, which can be chosen in a wide range of
plug-in boards, from standard HV/LV boards and floating boards to generic I/O boards
monitoring external parameters or branch controllers. All the types of boards can be
freely mixed in the same crate so as to fit the user's needs.
Both the Power-On and the Channel Out Enable of the System can be performed either
locally or remotely. Remote Enable is performed by sending the proper input signal via
the relevant front panel connector.
Each crate may be controlled either locally or remotely. Local control is performed
manually through a key-pad, a compact switch and a 7.7" colour LCD located on the
front panel. Remote control is feasible via the interface connectors located on the front
panel. These include a RS232 interface, which can be used to plug in a video terminal
(ANSI VT100 or compatible) or a IBMTM PC, a VGA port to connect an external standard
VGA monitor and two PS/2 connectors to plug in an external keyboard and, in the near
future, a mouse pointer. The usual HIGH SPEED (H.S.) CAENET interface is also
available to daisy-chain more SY2527 crates (up to 99 crates).
A sophisticated Software User Interface is available both in local or remote control,
featuring symbolic names for channels, custom status displays and other features
designed to help the management of a large number of channels.
Programmable parameters for each power channel include two voltage values (V0set,
V1set) and two current limit values (I0set, I1set). The switching from one value to the
other is performed via two external (NIM or TTL) input levels (VSEL, ISEL). The
maximum voltage slew-rate (Volt/second) may be programmed for each channel. Two
distinct values are available, Ramp-Up and Ramp-Down. Any command to change the
voltage will result in a linear voltage increase or decrease with time, the rates being
determined by the Ramp-Up or Ramp-Down parameters, respectively.
For the boards with programmable current hardware protections the ISET values of the
channels represent a software-controlled protection on the channels' currents. In this
case the channel cannot draw a current higher than its programmed limit.
For the boards with fixed current hardware protections, i.e. boards which have the
current hardware protection fixed to a common value for all the channels, the IMON
values are used to signal a fault, but the channels can draw a current larger than the
ISET values.
In both cases, if a channel tries to draw a current larger than the programmed limit, it is
signalled to be in OVERCURRENT. The System detects this state as a fault and reacts
according to the setting of the TRIP parameter, namely:
1) TRIP = infinite (constant CURRENT mode)
If the Board has programmable current hardware protections, the output voltage is
varied to keep the current below the programmed limit. The channel behaves like a
current generator.
If the Board has fixed current hardware protections, the output current is permitted
to exceed the ISET value; the channel behaves like a current generator only if the
maximum current value is reached.

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2) TRIP = finite value (TRIP mode)
In this case, the channel behaves as in the constant CURRENT mode for a time
equal to the finite value set as TRIP parameter, and then it is switched off according
to the selected Power-Down option (Kill/Ramp-Down). If the Kill option is selected,
the channel will be switched off immediately. If the Ramp-Down option is selected,
the voltage will drop to zero at a rate determined by the value of the Ramp-Down
parameter programmed for that channel.
Other front panel signals and relevant LEDs are foreseen to signal the channel status,
such as OVERVOLTAGE, UNDERVOLTAGE, CHANNEL ON and TRIP. Another set of
LEDs warn about possible fault conditions in the system operation (OVER
TEMPERATURE, FAN FAILURE, POWER FAILURE). For a detailed description of
these conditions please refer to Section 4in this manual. A description of all front panel
components can be found in the Hardware Installation Guide.
A RESET can be generated either manually via a front panel button or remotely by
sending a proper signal through the relevant connector. In both cases it is possible to
reset only the CPU of the system or both the CPU and the boards, depending on the
duration of the RESET signal. The System may be instructed to react to a Power On or
to a Restart bringing all the channels from zero to the programmed value without the
user's intervention via the Power-On parameter. If this option is enabled, the System
will recover smoothly from a power failure or RESET, automatically restoring the status
it had before the power was interrupted. KILL and INTERLOCK functions have been also
implemented and allow to drop the channel output voltage to zero, independently from
the Ramp-Down parameter set.For a detailed description of all system control and
monitoring signals and of channel parameters please refer to Section 4in this manual.
In order to protect the System from improper use, a multilevel management of user’s
profiles has been foreseen, including the possibility of having password protection for
each channel or group of channels. In particular, three different login levels are
available: Guest, User and Administrator, each with different levels of access ability to
the system parameter monitoring and setting. Moreover, the possibility of defining
preferred custom environments is foreseen for each single user. Please refer to
Section 10 for further details on this subject.
Daisy-chain configuration of more SY2527 crates can be achieved by using the
H.S. CAENET connectors located on the front panel. The chain can be controlled
remotely by a SY2527 system configured as CAENET Controller allowing for Multicrate
Operation, i.e. the possibility of controlling and monitoring interactively the daisy-chained
crates one at a time, either from any one of the SY2527 crates of the chain or from a PC
or video terminal externally connected to any one of the crates. Moreover, in Multicrate
Operation it is possible to connect to the chain a SY127 system, equipped with a
A128HS board, and interact with it via H.S. CAENET. The same operation is also
possible with a SY527 system.
The Ethernet interface further extends the access facilities to the system: it allows the
use of a Browser or just a Telnet connection to monitor and control interactively each
crate connected to the network. This type of link, which can be reduced to the
Customer’s Intranet in order to have secure access, allows to perform remotely a wide
range of tasks, such as system debugging, firmware upgrading and even technical
support. A special software interface has been developed for the monitoring and setting
of system parameters from TCP/IP environment.
Further remote control interfaces are available on request and can be inserted into the
expansion slots on the front panel.

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Board Backplane
16-bit Interface Bus Backplane
HV Board
Slot 5
I/O Board
CPU
Front Panel
LCD Screen
1 2 3
4 5 6
7 8 9
.0-
ACK CMD BS
+-+-
Contrast Brightness
Keyboard
Compact Switch
Input/Output
Expansion Slots
I/O
Controller of: Keyboard,
Compact Switch,
LCD contrast
and brightness
S
C
R
E
E
N
V
G
A
R
S
2
3
2
Keyboard
Mouse
ON
OFF
REMOTE
POWER
LINE
P
O
W
E
R
HV Board
Slot 1
HV Board
Slot 0
R
S
2
3
2
Power
Supply
Unit
E
X
P
A
N
S
I
O
N
E
X
P
A
N
S
I
O
N
Fig. 2.2– Block diagram of the functional parts of the SY2527 system

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2.3 Technical specification tables
Table 2.1- Technical specifications of the SY2527 mainframe: general
Packaging -19"-wide, 4U-high Euro-mechanics rack;
-Depth: 770 mm.
Weight Mainframe (*): 19 kg
Power Requirements Monophase: 88÷264 V a.c., 48÷64 Hz; 38 A
Max. number of boards per crate 6
Power supply unit output
+/-12 V, 8 A
+5 V, 20 A
+48 V, 15.6 A
Max. output power 750 W
Operating temperature From 5°C (dry atmosphere) to +40°C
Storage temperature From -20°C (dry atmosphere) to +50°C
(*) boards are not included.

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Table 2.2- Technical specifications of the SY2527 mainframe: front and rear panel components
(refer to the figure in Appendix A)
Displays
(I/O control
section)
−GEN, red LED, lights up as GENERAL STATUS signal, corresponding to a logic
combination (defined by the user) of OVC, UNV, OVV, TRIP, is TRUE;
−CH-ON, red LED, lights up as at least one channel is ON;
−OVC, UNV, TRIP, OVV, red LEDs, light up as at least one channel is in Over
Current, Under Voltage, Trip, Over Voltage condition, respectively;
−RSTFLAG, red LED, lights up after a RESET;
−CHK PASS, green LED, lights up as the initial system check has been
performed successfully and the system is ready.
−VSEL, ISEL, green LEDs, light up as the relevant connectors for voltage and
current selection, respectively, are TRUE;
−KILL, green LED, lights up as the system is in KILL condition;
−NIM, TTL, green LEDs, light up as the relevant standard is selected;
−RESET, red/orange LED, lights up as a RESET occurs: it is initially red and then
becomes orange, depending on the duration of the RESET signal;
−LOCAL ENABLE, REM ENABLE, red LEDs, light up, respectively, as the Local
Enable mode is selected and as the Remote Enable mode is selected and the
proper REM EN signal is sent in;
−OVERTEMP, FAN FAILURE, PWR FAILURE red LEDs, light up as the Over
Temperature, Fan Failure and Power Failure condition, respectively, occurs;
−INTERLOCK, red LED, lights up as the system is in INTERLOCK condition.
−LOCAL NET, CAENET, red LEDs, light up as the relevant connectors are in
activity;
−MASTER, red LED, lights up as the HV SYNC clock is internally generated.
Displays
(Power
Supply)
-+5, +12, -12, +48, green LEDs, light up as the relevant power supply is present;
-MAIN, orange LED, when alight, it warns that the system is connected to the
mains and the MAIN switch on the rear panel is in position 1.
Switches
−NIM/TTL switch for the selection of the level standard of the output signals;
−LOCAL ENABLE/DISABLE/REMOTE ENABLE switch, which allows,
respectively, to enable the channels locally or to disable them or to allow their
remote enable via the proper ENABLE input signal;
−INTERLOCK CLOSED/OPEN switch to select if the INTERLOCK function is
active when the contact is closed or open, respectively.
−MAIN switch (rear panel) to power the Power Supply Section;
−POWER ON key (front panel, primary power supply) to power on the system
locally or to enable its remote power on.
Buttons RESET push button: if T
RESET
> T
RCPU
= 100÷200 ms àCPU is reset; if T
RESET
> T
RCH
= T
RCPU
+900 ms àCPU, boards are reset and the channels are turned
off. Reset must be enabled via software (RESET FLAG window, see §7.1.22).
Local Control
Interfaces
−7.7" colour LCD screen, with brightness and contrast control buttons;
−15-key keypad;
−compact switch (8 directions + press action).
Remote
Control
Interfaces
−H.S. CAENET;
−LOCAL NET (to control non-intelligent systems ONLY);
−Two PS/2 connectors for external PC keyboard and mouse (the latter is not yet
implemented as for software);
−VGA-standard connector for external VGA monitor;
−ETHERNET (TCP/IP);
−RS232 interface for external VT100 or PC.
Optional
Interfaces −CAN-bus.

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Table 2.3- Technical specifications of the SY2527 mainframe: input and output signals
(refer to the figure in Appendix A)
VSEL: Std. NIM/TTL; 00-type LEMO connector.
Function: channel voltage selection.
ISEL: Std. NIM/TTL; 00-type LEMO connector.
Function: channel current selection.
RESET: Std. NIM/TTL; 00-type LEMO connector.
Function: RESET from the front panel. If the duration of the RESET signal
is > T
RCPU
=100÷200 ms, the CPU is reset; if it is > T
RCH
=T
RCPU
+ 900 ms,
also the boards are reset and the channels are turned off. Reset must be
enabled via software (RESET FLAG window, see §7.1.22).
KILL: Std. NIM/TTL; 00-type LEMO connector.
Function: KILL from the front panel: it turns all channels off.
ENABLE: Std. NIM/TTL; 00-type LEMO connector.
Function: remote enable.
INTERLOCK: open/closed contact;00-type LEMO connector.
Function: INTERLOCK command: it turns all the channels off as it is
open/closed, according to the position of the relevant switch.
INPUTS
REMOTE IN: +12V, 50mA max., electric. insulated;tol.:-40%÷+20%;00LEMO connector.
Function: remote power-on of the system.
OVC: Std. NIM/TTL (selectable); 00-type LEMO connector.
Function: at least one channel is in Over Current.
UNV: Std. NIM/TTL (selectable); 00-type LEMO connector.
Function: at least one channel is in Under Voltage.
OVV: Std. NIM/TTL (selectable); 00-type LEMO connector.
Function: at least one channel is in Over Voltage.
CH-ON: Std. NIM/TTL (selectable); 00-type LEMO connector.
Function: at least one channel is ON.
RST FLAG: Std. NIM/TTL (selectable); 00-type LEMO connector.
Function: a RESET occurred according to user's settings (RESET FLAG
window, see §7.1.22).
CHK PASSED: Std. NIM/TTL (selectable); 00-type LEMO connector.
Function: initial system check successful and system ready.
TRIP: Std. NIM/TTL (selectable); 00-type LEMO connector.
Function: at least one channel in Trip condition.
GEN: Std. NIM/TTL (selectable); 00-type LEMO connector.
Function: GENERAL STATUS indication; corresponds to the logic
combination (defined by the user) of OVC, UNV, OVV, TRIP.
OUTPUTS
REMOTE OUT: +12V level,refer. to the crate ground;tol.:-20%÷+20%;00LEMO connector.
Function: remote power-on of the adjacent daisy-chained crate.
HVSYNC: Bidirectional differential signal ; 2-pin LEMO connectors.
Function: sync clock for the PWS Units ((RS485 Std., 1.25 MHz).
LOCAL NET: Bidirectional differential signal; 2-pin LEMO connector.
Function: LOCAL bus for the control of non-intelligent systems ONLY.
CAENET: Bidirectional CAENET; 00-type LEMO connector.
Function: H.S. CAENET interface.
I/O
TRIP IN/OUT: Bidirectional differential signal; 5x2-flat connectors.
Function: external TRIP lines to handle TRIP conditions.
All the above signals, except for the REMOTE IN/OUT, are referred to a common ground
(COMMON GROUND) and are galvanically insulated up to 150 V with respect to the ground of
the crate (CRATE GROUND).

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3. Safety information and operation requirements
This section contains the fundamental safety rules for the installation and operation of
the SY2527 system.
Read thoroughly this section before starting any procedure of installation or operation of
the product.
3.1 General information
Review the following safety 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.
3.1.1 Injury Precautions
Use Proper Power Cord and HV Cables.
To avoid fire hazard, use only the power cord and HV cables specified for this product.
Avoid Electric Overload.
To avoid electric shock or fire hazard, do not apply a voltage to a load that is outside the
range specified for that load.
Avoid Electric Shock.
To avoid injury or loss of life, do not connect or disconnect cables while they are
connected to a voltage source.
Ground the Product.
This product is grounded through the grounding conductor of the power cord. To avoid
electric shock, the grounding conductor must be connected to earth ground. Before
making connections to any input or output terminals of the product, ensure that the
product is properly grounded.
Do Not Operate Without Covers.
To avoid electric shock or fire hazard, do not operate this product with covers or panels
removed.
Do Not Operate in Wet/Damp Conditions.
To avoid electric shock, do not operate this product in wet or damp conditions.
Do Not Operate in an Explosive Atmosphere.
To avoid injury or fire hazard, do not operate this product in an explosive atmosphere.
Do not install the crates on top of each other.
A minimum distance of 15 cm is required between the top of a crate and any other
object over it.

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3.1.2 Product Damage Precautions
Use Proper Power Source.
Do not operate this product from a power source that applies more than the voltage
specified.
Provide Proper Ventilation.
To prevent product overheating, provide proper ventilation.
Do Not Operate With Suspected Failures.
If you suspect there is damage to this product, have it inspected by qualified service
personnel.
3.1.3 EC Certifications and Compliance
Use in conformity of the definition with fully equipped mainframe with fully closed slots
by boards or dummy panels. Sufficient cooling and mains connection must be secured
according to regulations. Signal lines length during all tests was less than 3 m. The
RS232 cable must be properly shielded and have a length of less than 3 m. Admitted for
powering by industrial mains only.
3.1.4 Terms in this Manual
These terms may appear in this manual:
WARNING:
Warning statements identify conditions or practices that could result in injury or loss of
life.
CAUTION:
Caution statements identify conditions or practices that could result in damage to this
product or other property.
3.2 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 Refer to Manual

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3.3 General Operation Requirements
Before operation, check the following requirements:
Operating temperature: 5÷40°C (dry atmosphere)
Max. length of cables: according to cable specifications