Caen ELS LiAM 6005 User manual

LiAM 6005
5A@60V Bipolar
Linear Amplifier Module
User’s Manual
All Rights Reserved
© CAEN ELS d.o.o.
Rev. 1.3 –October 2014
MAGNET POWER SUPPLY SYSTEMS

2
CAEN ELS d.o.o.
Kraška ulica, 2
6210 Sežana –Slovenija
Mail: [email protected]
Web: www.caenels.com

Table Of Contents
1. INTRODUCTION..............................................................................................10
1.1 LIAM OVERVIEW .........................................................................................10
1.2 SYSTEM STRUCTURE.....................................................................................12
2. SAFETY AND INSTALLATION ....................................................................15
2.1 GENERAL SAFETY INFORMATION..................................................................15
2.2 INITIAL INSPECTION ......................................................................................15
2.3 INJURY PRECAUTIONS...................................................................................16
2.3.1 Caution.....................................................................................................16
2.4 GROUNDING..................................................................................................16
2.5 INPUT RATINGS.............................................................................................17
2.6 OUTPUT CONNECTORS ..................................................................................17
2.7 LIVE CIRCUITS ..............................................................................................17
2.8 PART REPLACEMENT AND MODIFICATIONS ..................................................17
2.9 INSTALLATION INSTRUCTIONS ......................................................................17
2.9.1 Installation and Cabling Procedure ........................................................19
2.9.2 Protection Covers - optional....................................................................22
2.10 SUGGESTED CABLE SECTIONS........................................................................24
2.11 VOLTAGE RAIL FUSES...................................................................................24
3. LIAM DESCRIPTION......................................................................................26
3.1 GENERAL DESCRIPTION ................................................................................26
3.1.1 Internal Protections .................................................................................27
3.1.2 External Interlocks...................................................................................32
3.1.2.1 Interlocks Enabling/Disabling .........................................................33
3.1.2.2 Interlocks Activation States.............................................................33
3.1.2.3 Interlock Configuration Example ....................................................34
3.1.3 Analog Current Monitor..........................................................................35
3.2 INTERNAL MEMORY MAPPING......................................................................36
3.2.1 “Value” Section Cells..............................................................................38
3.3 STATUS REGISTER.........................................................................................40
3.4 ADAPTIVE RAIL SWITCHING .........................................................................42
3.5 AUTOMATIC LOAD RECOGNITION.................................................................43
4. LOCAL DISPLAY.............................................................................................46
4.1 BOOT-UP PAGE..............................................................................................46
4.2 MONITOR PAGE.............................................................................................47
4.3 AUTOMATIC LOAD RECOGNITION PAGE .......................................................49
5. REMOTE CONTROL.......................................................................................50
5.1 PRELIMINARY INFORMATION ........................................................................50
5.2 LIST OF COMMANDS......................................................................................50
5.3 COMMANDS OVERVIEW ................................................................................51
5.3.1 “FDB” Command....................................................................................53
5.3.2 “MOFF” Command.................................................................................56
5.3.3 “MON” Command...................................................................................57
5.3.4 “MRESET” Command.............................................................................58

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5.3.5 “MRG” Command ...................................................................................59
5.3.6 “MRI” Command.....................................................................................60
5.3.7 “MRID” Command..................................................................................61
..............................................................................................................................61
5.3.8 “MRM” Command...................................................................................62
5.3.9 “MRP” Command ...................................................................................63
5.3.10 “MRN” Command ...............................................................................64
5.3.11 “MRR” Command ...............................................................................65
5.3.12 “MRT” Command................................................................................66
5.3.13 “MRV” Command ...............................................................................67
5.3.14 “MRW” Command...............................................................................68
5.3.15 “MSP” Command................................................................................69
5.3.16 “MSR” Command................................................................................70
5.3.17 “MST” Command ................................................................................71
5.3.18 “MUP” Command ...............................................................................72
5.3.20 “VER” Command ................................................................................73
5.3.22 “MWG” Command ..............................................................................74
5.3.23 “MWI” Command................................................................................75
5.3.24 “PASSWORD” Command ...................................................................76
5.3.25 “MTUNE” Command (Automatic Tuning Procedure)........................77
5.4 IP ADDRESS CONFIGURATION.......................................................................78
5.4.1 IP Address configuration - TELNET connection.....................................79
5.4.2 IP Address configuration - DeviceInstaller®..........................................81
6. TECHNICAL SPECIFICATIONS ..................................................................83
ANNEX A - OUTPUT CONNECTORS..................................................................85

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Document Revision
Date
Comment
0.0
February 1st 2013
Document created
0.1
February 26th 2013
First draft release
1.0
March 8th 2013
First release
1.1
March 21st 2013
MTUNE command
explanation
1.2
February 10th 2014
Output and Input power
protection cover added
1.3
October 30th 2014
Manual graphics changed

LiAM User’s Manual
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Safety information - Warnings
CAEN ELS 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.
Please read carefully the manual before operating any part of the instrument
WARNING
High voltage, do NOT open the boxes
CAEN ELS d.o.o. 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 this User's Manual before
any kind of operation.
CAEN ELS d.o.o. 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.

LiAM User’s Manual
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Read over the instruction manual carefully before using the instrument.
The following precautions should be strictly observed before using the LiAM:
WARNING
Do not use this product in any manner not
specified by the manufacturer. The protective
features of this product may be impaired if it is
used in a manner not specified in this manual.
Do not use the device if it is damaged. Before
you use the device, inspect the instrument for
possible cracks or breaks before each use.
Do not operate the device around explosives gas,
vapor or dust.
Always use the device with the cables provided.
Turn off the device before establishing any
connection.
Do not operate the device with the cover
removed or loosened.
Do not install substitute parts or perform any
unauthorized modification to the product.
Return the product to the manufacturer for
service and repair to ensure that safety features
are maintained
CAUTION
This instrument is designed for indoor use and in
area with low condensation.

LiAM User’s Manual
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The following table shows the general environmental requirements for a correct
operation of the instrument:
Environmental Conditions
Requirements
Operating Temperature
5°C to 45°C
Operating Humidity
30% to 85% RH (non-condensing)
Storage Temperature
-10°C to 60°C
Storage Humidity
5% to 90% RH (non-condensing)

Introduction LiAM User’s Manual
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1.Introduction
This chapter describes the general characteristics and main features of the
LiAM linear bipolar power supply unit.
1.1 LiAM Overview
This power supply system for electromagnets is a compact linear current-
controlled power supply system named LiAM 6005 (LInear Amplifier Module
±60V@±5A).
The unit is designed in order to have true bipolar operation –i.e. real zero-
crossing –that allows smooth transitions around the zero-current level. Low-noise and
high-stability are the main characteristics of these bipolar modules in order to obtain
maximum performances on the relatively-generated magnetic field in the accelerator
facility.
The input ratings of the power supply unit are three-phase 180-220VAC@50-
60Hz, adaptable to either the Japanese or US mains distribution network. Single-phase
versions for the European market are available upon request.
Output current and output voltage values are displayed on a large display
placed on the module front panel. LEDs, also placed on the module front panel, give
indication of the module operational status.
Remote connectivity to LIAM 6005, as for all other CAENels instrumentation,
is guaranteed by means of a standard RJ-45 Ethernet connection (TCP-IP) that allows
to easily control and monitor the functionalities of the power supply unit (current
setting, output current reading and setting, temperature monitoring, etc.).
The “digital” control solution with respect to external analog one gives the
advantages of greatly improved noise immunity: the analog voltage control signals
that come from external DACs are subject to noise pick-up and this effect is greatly
amplified when needing very precise output currents or output voltages.
Easiness of control of large installations is also one of the big advantages of
Ethernet connectivity since everything can be handled from the control system
directly to the modules. Maintenance issues are also easier and faster to carry out with
the fact that the firmware for all the modules can be upgraded remotely.
Accuracy of the output current is also a great advantage of using digital
interface: the calibration of the output current is performed, using a digital third-order
polynomial fit curve, directly on the module itself so that external DACs drifts or non-

LiAM User’s Manual Introduction
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linearity are avoided/bypassed (since they would not be included in the computation
of the calibration curves).
This LIAM 6005 power unit, rated at 300W output power, is based on the
cascade of a linear three-phase AC/DC stage and a linear current-controlled output
stage. A particular technique allows for automatic rail switching –i.e. voltage rails
switch between different voltage levels in order to optimize efficiency –an also a
dedicated automatic load recognition procedure was implemented (see dedicated
sections for further details).
Auxiliary AC/DC and DC/DC power supplies are also linear in order to avoid
any switching noise that could be generated by the device. Linear transformers are
optimized to reduce magnetic flux leakage that could cause EMI (Electro-Magnetic
Interference).
Control of the output current is made by a high-resolution and low-drift
Digital-to-Analog converter (DAC) that sets a resolution of about 160µA on the
module output current setpoint.
Current sensing is performed with a particular array of precise shunt resistors
that guarantees extremely low temperature drifts and excellent linearity.
External configurable interlocks are also provided on the LiAM 6005 rear
panel in order to have the power supply connected, if needed, to some external
devices/safety circuitries. A solid-state status output is also available on the rear panel
of the device: it allows the monitoring of the module output stage (enabled/disabled)
by opening/closing a contact.
A load energy protection/damping circuit is implemented in order to protect
the power supply and the load from over-voltage conditions. This feature is necessary
when having large current in large inductive loads since the energy that gets stored
into the load can be of a large entity and it could cause problems and damages.
A monitor output –rated at ±10V for a ±5A output current –is also present on
the rear panel of the power supply on a BNC connector and it can be used for external
monitoring purposes.
The cooling of the LiAM 6005, a critical task when using linear power
supplies, is performed by speed-regulated fan forced-air convection with a front-to-
rear direction.
Other features of the LiAM power units, as remote firmware upgrade, short-
circuit stability, etc. are further on described in this manual.

Introduction LiAM User’s Manual
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1.2 System Structure
A LiAM 6005 power supply unit (Figure 1) is composed by a standard 2U-19”
crate with a depth of 550 mm (a maximum of 578 mm considering also AC input,
interlocks and output terminal connectors).
Figure 1: front view of a LiAM 6005 unit
On the rear side of the power supply unit are visible the air outlets for cooling,
output connection terminals, interlock and output status connector, three-phase inputs,
rail fuses and the analog output monitor coaxial connector.
Figure 2: rear view of a LiAM 6005 unit
Channel interlock and current output connectors, AC line input and DC-Link
power and control signals are all available on the SY3634 rear panel, as shown in
Figure 2.
Output
Terminals
C
Rails Fuses
Interlocks and
output status
Three-phase
Input
Output Monitor

LiAM User’s Manual Introduction
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The LIAM 6005 Linear Power Supply main block diagram, with its principal
features, is hereafter presented in Figure 3.
The proposed control scheme is a well-known topology that guarantees high
stability and high reliability for the entire system.
The three-phase transformers convert the mains input power, rated at 200VAC
and 50-60 Hz, to different DC voltages: +VDD, -VDD and ±VAUX and they act as the
main AC/DC section
Please note that, for safety and protection issues, all input phases are protected
with circuit breakers (carefully read Installation section in order to safely and
correctly install LiAM 6005 power units).
The VAUX voltages are used to power up the control electronic sections of the
power supply and are obtained from different windings with respect to the power
voltages.
The digital control section of the LIAM 6005 takes care of the general power
supply diagnostics, the interfacing to the Ethernet communication module, the control
of the DAC, the display handling and some other tasks.
Module can perform waveforms as sine or square waves (or any other user-
defined waveform) controlling the LIAM 6005 via Ethernet connection; this can
easily be performed by transmitting to the power supply the desired waveform on a
point-by-point basis (the maximum data-rate frequency for the set-points is more than
100Hz).

Introduction LiAM User’s Manual
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Figure 3: simplified block diagram of the LiAM unit

LiAM User’s Manual Safety and Installation
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2.Safety and Installation
Please read carefully this general safety and installation information before
using the product.
2.1 General Safety Information
This section contains the fundamental safety rules for the installation and
operation of the system. Read thoroughly this section before starting any procedure of
installation or operation of the product.
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.
2.2 Initial Inspection
Prior to shipment this system was inspected and found free of mechanical or
electrical defects. Upon unpacking of the system, inspect for any damage, which may
have occurred in transit. The inspection should confirm that there is no exterior
damage to the system such as broken knobs or connectors and that the front panels are
not scratched or cracked.
Keep all packing material until the inspection has been completed. If damage is
detected, file a claim with carrier immediately and notify CAEN ELS d.o.o. service
personnel (via fax or via e-mail message to [email protected]).

Safety and Installation LiAM User’s Manual
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2.3 Injury Precautions
This section contains the fundamental safety rules for the installation and
operation of the system in order to avoid injuries.
2.3.1 Caution
The following safety precautions 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 ELS d.o.o. shall not be liable for user’s failure to comply with these
requirements.
To avoid electrical shock or fire hazard, do not apply a voltage to a load that is
outside the range specified for that load.
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 electrical 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 Operate With Suspected Failures.
If you suspect there is damage to this product, have it inspected by qualified
service personnel.
2.4 Grounding
To minimize shock hazard, the LiAM power supply unit must be connected to
an electrical ground. The ground terminal is present on the mains sockets on the back
side of the crate and it is directly connected inside the chassis.

LiAM User’s Manual Safety and Installation
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2.5 Input Ratings
Do not use AC supply which exceeds the input voltage and frequency ratings of
this instrument. For input voltage and frequency rating of the module see Chapter 0.
For safety reasons, the mains supply voltage fluctuations should not exceed
above voltage range.
2.6 Output Connectors
Do not plug or unplug output connections when power converters are on and the
power units are regulating current on the electrical load.
2.7 Live Circuits
Operating personnel must not remove the 19” crates covers NOR touch the
external terminal screw connection that may be supplied at dangerous potential.
No internal adjustment or component replacement is allowed to non-CAEN
ELS d.o.o. personnel. Never replace components with power cables connected.
In order to avoid injuries, always disconnect power plugs directly from the wall
mains, discharge circuits and remove external voltage source before touching
components (wait 5 minutes at least).
2.8 Part Replacement and Modifications
Always disconnect power terminals, discharge circuits and remove external
voltage source prior to fuse replacement (wait 5 minutes at least).
Other parts substitutions and modifications are allowed by authorized CAEN
ELS d.o.o. service personnel only.
2.9 Installation Instructions
Follow these instructions in order to correctly install the LiAM power supply
system.
PLEASE READ THIS SECTION CAREFULLY IN ORDER TO
AVOID ANY SHOCK HAZARD.
Install the 2U LiAM 6005 system crate in a standard 19” cabinet as shown in the
following Figure 4:

Safety and Installation LiAM User’s Manual
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Figure 4: installation of LiAM units in a 19” cabinet
The three-phase input connections – i.e. earth and the three lines L1, L2 and
L3 – are placed on a terminal block connector on the rear of the crate, as shown in
Figure 5:
Figure 5: rating plate and three-phase input terminal connector
The power supply rating plate can be found on the rear panel of the LiAM
power unit, indicating input ratings:
-3 × 200 VAC ± 10%;
-50-60 Hz;
-550W input power.
WARNING
Please connect the EARTH cable to the terminal connection marked
with the following symbol FIRST:

LiAM User’s Manual Safety and Installation
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WARNING
BE AWARE THAT ONCE CONNECTED, THE AC VOLTAGE
LINES L1, L2 and L3 are ACCESSIBLE FROM THE REAR
SCREW HOLE TERMINALS AS INDICATED IN THE
FOLLOWING FIGURE
Figure 6: screw terminals at dangerous potential
NEVER connect L1, L2 and L3 lines if AC power is present on the
corresponding cables. Always disconnect wall AC plugs before making these
connections. Using a screwdriver on these screw terminal connection may cause a
serious ELECTRICAL SHOCK (refer to Figure 6).
2.9.1 Installation and Cabling Procedure
Connections to the LiAM power supply units must be carried out in the order
herein presented. Please read and follow these indications carefully:

Safety and Installation LiAM User’s Manual
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1) connect the ground terminal of the input connector first;
Figure 7: connection of EARTH conductor
2) (optional) connect the interlock terminals to the load interlock
signals and the output relay status if needed (only connection
of interlock #2 is shown in the picture);
Figure 8: sample connection of interlock #2 (yellow = positive, white = negative)