Caen A 1732, A 1832, A 1732B, A 1832B HV Technical Information Manual

Technical
Information
Manual

Revision n.5

2 May 2005

MOD. A 1732 - A 1832

HIGH VOLTAGE

BOARDS

MANUAL REV.5

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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. INTRODUCTION.........................................................................................................................................................3

1.1 THE CAEN UNIVERSAL MULTICHANNEL POWER SUPPLY SYSTEM...........................................................................3

1.2 TECHNICAL SPECIFICATIONS TABLE OF THE SY 1527 SYSTEM..................................................................................5

2. MOD. A 1732 - A 1832 HV BOARDS.........................................................................................................................6

2.1 FUNCTIONAL DESCRIPTION.......................................................................................................................................6

2.2 CHANNEL CHARACTERISTICS TABLE........................................................................................................................7

2.3 FRONT PANEL ..........................................................................................................................................................8

2.4 TECHNICAL SPECIFICATIONS ....................................................................................................................................9

2.4.1 Packaging....................................................................................................................................................10

2.4.2 External connections ...................................................................................................................................10

2.4.3 Displays.......................................................................................................................................................10

2.4.4 Other components........................................................................................................................................11

3. SAFETY INFORMATION AND INSTALLATION REQUIREMENTS ..............................................................12

3.1 GENERAL SAFETY INFORMATION ............................................................................................................................12

3.1.1 Injury Precautions.......................................................................................................................................12

3.2 SAFETY TERMS AND SYMBOLS ON THE PRODUCT ...................................................................................................13

3.3 INSTALLATION ............................................................................................................................... ........................13

4. OPERATING MODES...............................................................................................................................................14

4.1 OUTPUT CONTROL AND MONITORING......................................................................................................................14

4.2 OUTPUT ENABLE....................................................................................................................................................15

4.3 FULL SCALE RANGE SETTING ..................................................................................................................................15

APPENDIX A....................................................................................................................................................................... 18

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LIST OF FIGURES

FIG. 2.1 – MOD. A 1732 – A 1832 (LEFT) AND MOD. A 1732B – A 1832B (RIGHT) FRONT PANEL...................9

FIG. 4.1 – A) MOD. A1732 - A 1832 SIDE VIEW; B) MOD. A1732B - A 1832B TOP VIEW.....................................16

FIG. 4.2 – FULL SCALE RANGE DIP-SWITCH TOP VIEW....................................................................................................17

FIG. A.1 – MOD. A1832 E CHANNEL INDIVIDUAL ENABLE...........................................................................................18

LIST OF TABLES

TABLE 1.1 - TECHNICAL SPECIFICATIONS OF THE SY 1527 MAINFRAME: GENERAL....................................................5

TABLE 2.1 - CHANNEL CHARACTERISTICS OF THE MOD. A 1732 / 1732B - A 1832 / 1832B HV BOARDS.............7

TABLE 4.1 - FULL SCALE RANGE SETTINGS......................................................................................................................16

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1. Introduction

1.1 The CAEN Universal Multichannel Power Supply System

The SY 1527 system is the fully equipped, large scale 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 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 this module
to meet the requirements of a wide range of experimental conditions. The latter range
from those of LHC experiments, in which the model’s features 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 disposed 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 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.

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 new line of boards and distributors, analogous with those
available for the SY 527 system, and a set of branch controllers has been specially
developed for this new system. The minimum system configuration consists of the
primary power supply, one Power Supply Unit and one board.
The concept of modularity has been extended up to the possibility of arranging ‘clusters’
constituted by one ‘intelligent’ SY 1527 system able to drive other ‘non-intelligent’
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. The latter,
actually, can be designed specifically for on-detector installation. All the custom

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electronics can be anyway remotely controlled by single boards which are inserted in the
SY 1527 mainframe and act as branch controllers.

Fast, accurate set-up and monitoring of system 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 non­volatile 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 CERN­approved 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 global down time, and
easy access to the computing core and peripherals completes the system’s flexibility.

Easy interfacing is another key-point of the SY 1527 system. Thanks to the H.S.
CAENET interface, the system ensures full communication compatibility with the
previous models. Besides the RS232 interface and Ethernet (TCP/IP) 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.

For a detailed description of the SY 1527 Universal Multichannel Power Supply System
please refer to the SY 1527 User's Manual .

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1.2 Technical Specifications Table of the SY 1527 system

Table 1.1 - Technical specifications of the SY 1527 mainframe: general

Packaging

Weight

Power requirements

Max. number of boards per crate

Max. number of power supply
units per crate

Primary power supply output (Mod.
A 1531)

Power supply unit output (Mod.
A 1532)

Max. output power

Operating temperature

- 19"-wide, 8U-high Euro-mechanics rack;

- Depth: 720 mm.

-Mainframe (*): 24 kg

-Mod. A1532: 3.2 kg

Voltage range: 100/230 V
Frequency: 50/60 Hz

Power: 3400 W

16

3

± 12 V, 8 A

+5 V, 20 A

+48 V, 15.6 A

2250 W

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. Mod. A 1732 - A 1832 HV Boards

2.1 Functional description

The Mod. A 1732 – A 1832 are single width boards housing 12 H.V. channels with either
positive (A 1732P – A 1832P) or negative (A 1732N – A 1832N) polarity.
28 channel double width versions (Mod. A 1732B – A 1832B) are available as well, with
either positive (A 1732BP – A 1832BP) or negative polarity (A 1732BN – A 1832BN).
The Mod. A 1732 - A 1732B output channels have 6 kV / 1 mA full scale range (dip­switch selectable); the Mod. A 1832 - A 1832B output channels offer either 6 kV / 1 mA
or 6 kV / 200 µA full scale range (dip-switch selectable); 12 channel versions with
individually enabled channels (Mod. A1832 E P/N) are available as well (see also

APPENDIX A).

If the output voltage differs from the programmed value by more than 3% of voltage full
scale range, the channel is signalled to be either in OVERVOLTAGE or
UNDERVOLTAGE condition. Moreover, for each channel, a voltage protection limit
SVMAX can be fixed via software with 1 V resolution and the output voltage can not be
programmed beyond this value.
The HV RAMP-UP and RAMP-DOWN rates may be selected independently for each
channel in the range 1÷ 500 V/s in 1 V/s steps.

The output current is monitored with 20 nA / 100 nA resolution depending on current
range; if a channel tries to draw a current larger than its programmed limit it is signalled
to be in OVERCURRENT condition; the SY 1527 system detects this state as a fault and
reacts according to the setting of the TRIP parameter

1) TRIP=infinite ( = 1000 s)

When the set output current value is reached the channel behaves like a constant current
generator.

2) TRIP=finite (< 1000 s)

The output current keeps the set value only for programmed time interval and then is switched
off.

The TRIP time (i.e. the maximum time an OVERCURRENT condition is allowed to last)
can be programmed in 0.1 s steps.
The maximum output voltage (VMAX Hardware) can be fixed, through a potentiometer
located on the front panel, at the same common value for all the board channels and this
value can be read out via software.
The boards host also a temperature sensor located on the PCB near the HV channels:
the temperature values measured by this sensor are used to signal Over Temperature
condition on the SY 1527.
The boards are provided with an "HV EN" input that disables the channels when it is not
connected to ground.

1

, namely:

1

Refer to the SY1527/SY2527/SY3527 User’s Manuals for details about the TRIP Handling.

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2.2 Channel Characteristics Table

Table 2.1 - Channel characteristics of the Mod. A 1732 / 1732B - A 1832 / 1832B HV Boards

Polarity:

Output Voltage:

Max. Output Current:

Voltage Set/Monitor Resolution:

Current Set/Monitor Resolution:

VMAX hardware:

VMAX hardware accuracy:

VMAX software:

VMAX software resolution:

Ramp Down:

Positive / Negative depending on purchased version

0÷6 kV

low range 200 μA (Mod. A 1832 - A 1832B)

high range 1 mA

500 mV

100 nA (Mod. A 1732 - A 1732B)

20 nA / 100 nA depending on current range

(Mod. A 1832 – A 1832B)

0÷6 kV common for all the board channels

± 2%

0÷6 kV settable for each channel

1 V

1÷500 Volt/sec, 1 Volt/sec step

Ramp Up:

Voltage Ripple:

2

Voltage Monitor vs. Output Voltage Accuracy: 3

Voltage Set vs. Voltage Monitor Accuracy:

2

Current Monitor vs. Output Current Accuracy: 2

Current Set vs. Current Monitor Accuracy: 2

2

From 10 Hz to 15 MHz at full load

3

From 10% to 90% of Full Scale Range

1÷500 Volt/sec, 1 Volt/sec step

< 30 mV pp (Mod. A 1832 – A 1732)

< 50 mV pp (Mod. A 1832B – A 1732B – A1832 E)

± 0.3% ± 1 V

± 0.3% ± 0.5 V

± 2% ± 0.5 μA (1 mA range)

± 2% ± 0.1 μA (200 μA range, Mod. A 1832 - A 1832B)

± 2% ± 0.1 μA (1 mA range)

± 2% ± 0.02 μA (200 μA range, Mod. A 1832 - A 1832B)

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Threshold temperature parameters (TMIN,
TMAX):

2.3 Front Panel

+5 ÷ +65 °C

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Mod. V560E

Mod. A 1832P

0

1

2

3

4

5

6

7

Channel LED

H

V

O

U

T

P

U

T

S

Mod. V560E

Mod. A1832BP

HV ON

GND G N D
GND G ND GN D
NC NC
NC NC NC
6 NC
0 12 23
7 18
2 14 25
9 20
3 15 26
10 21
4 16 27
11 22
5 17 NC
NC NC
NC NC IINT
GND G N D
GND G ND IEXT
GND G N D

+

8

Channel output

connector

9

10

11

MAXV

+

HV OUTPUT

trimmer

HV EN

H

M

V

A

E

X

N

V

SCALER

12 CH

POSITIVE

6 KV 1/0.2 mA

HV EN input

connector

MAXV

SCALER

28 CH

POSITIVE

6 KV 1/0.2 mA

!

Fig. 2.1 – Mod. A 1732 – A 1832 (LEFT) and Mod. A 1732B – A 1832B (RIGHT) front panel

2.4 Technical Specifications

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2.4.1 Packaging

The Mod. A 1732 – A 1832 modules are housed in a 5 TE-wide, 6U-high mechanics. The
Mod. A 1732B – A 1832B modules are housed in a 10 TE-wide, 6U-high mechanics.

2.4.2 External connections

The location of all components of the front panel is shown in Fig. 2.1, p. 8. The function
and electro-mechanical specifications of the external connectors are listed in the
following subsections.

CH 0..11 (A 1732 – A1832): Mechanical specifications:

HV coaxial connectors

Radiall SHVR317580-type

Electrical specifications

according to specifications given in Table

2.1, p.7.

: high voltage output

CH 0..27 (A 1732B – A 1832B): Mechanical specifications:

HV EN CONNECTOR Mechanical specifications:

00-type LEMO connector.

2.4.3 Displays

CH ON 0..11 LEDs (A 1732 - A1832):

Type: red LEDs for positive polarity version;

Multipin connector Radiall 691803004-type,
52 pin male (to be mated with Radiall
691802002-type4 [SCEM 09.41.34.700.2]) see

Fig. 2.1 for pin assignment.

Electrical specifications

: high voltage output

according to specifications given in Table

2.1, p.7.

Electrical specifications:

board ENABLE
input, if connected to ground, the channels
are enabled. Refer to § 4.2, p.15 for further
details.

Function: they light up as the relevant

channel is on.

yellow LEDs for negative polarity version

HV ON LED (A 1732B - A1832B): Function: it lights up if at least one output

channel is on.

4

Requires 52 pins Radiall 691804300 [SCEM 09.41.33.830.7] type, to be installed using the insertion/extraction

tool Radiall 282549024 [SCEM 34.95.17.125.3] type.

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Type: red LED for positive polarity version;

yellow LED for negative polarity version

2.4.4 Other components

VMAX trimmer: Function: it allows to adjust the hardware

maximum voltage VMAX common to all the
channels. Its value can be read out via
software.

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3. Safety information and installation requirements

3.1 General safety information

This section contains the fundamental safety rules for the installation and operation of the
boards. Read thoroughly this section before starting any procedure of installation or
operation of the product.

3.1.1 Injury Precautions

Review the following precautions to avoid injury and prevent damage to this product or
any products connected to it. To avoid potential hazards, use the product only as
specified. Only qualified personnel should perform service procedures.

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.

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 Operate With Suspected Failures.

If you suspect there is damage to this product, have it inspected by qualified service
personnel.

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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

High Voltage

3.3 Installation

The Mod. A 1732 – A 1832 are single-width boards which can be inserted in any slot of
the SY 1527 crate. The Mod. A 1732B – A 1832B are double-width boards which occupy
two SY 1527 slots each. At power ON the SY 1527 system processor will scan all the
slots in the crate to find out where the module is plugged and what kind of module it is.

ATTENTION

Refer to Manual

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4. Operating modes

The Mod. A 1732 – A 1832 and A 1732B – A 1832B boards can be controlled, either
locally or remotely, through the SY 1527 software interface. For details on SY 1527
system operation, please refer to the User's Manual of this product. The following
sections contain a description of commands available for the board control and status
monitoring.

ATTENTION

THE MOD. A 1732 and A 1832 BOARDS REQUIRE
SY 1527 FIRMWARE VERSION 1.09.04 OR LATER

4.1 Output control and monitoring

For each output channel, it is possible, through the SY 1527 system, to perform the
following operations:

• Assign to channel a symbolic name

• Set output voltage (VSET)

• Set max. output current (ISET)

• Set output voltage software limit (SVMAX)

• Set voltage ramp-up speed (RAMP-UP)

• Set voltage ramp-down speed (RAMP-DOWN)

• Set TRIP parameter

• Enable/disable POWER ON option

• Switch channel ON/OFF

• Monitor output voltage (VMON)

• Monitor output current (IMON)

• Monitor channel status

If the POWER ON option is enabled, the channel, at POWER ON, is restored in the
same condition it was before the POWER OFF or RESET; if this option is disabled, at
POWER ON or after a RESET, the channel is kept OFF independently from its previous
condition.

The following messages may be returned by the SY 1527 when monitoring the channel
status:

• OFF (channel turned OFF)

• RUP (channel ramping up)

• RDWN (channel ramping down)

• OVC (channel in OVERCURRENT condition)

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• OVV (channel in OVERVOLTAGE condition)

• UNV (channel in UNDERVOLTAGE condition)

• EXTTRIP (channel OFF due to external TRIP line signal)

• INTTRIP (channel OFF due to internal OVERCURRENT condition)

• EXT_DIS (channel disabled by board INTERLOCK protection)

Moreover it is possible to monitor board temperature and to check board status; the
following messages may be returned by the SY 1527 when monitoring the board status:

• UNDER_TEMP (board temperature < 5°C )

• OVER_TEMP (board temperature > 65°C)

4.2 Output Enable

The boards are provided with an "HV EN" input that enables the channels when it is
connected to ground.

When the channels are disabled the voltage outputs drop to zero at the maximum rate
available; when the output disable cause is removed, i. e. the "HV EN" connector is
connected to ground, the channels remain OFF until the User turns them ON via
software.

4.3 Full scale range setting

The output voltage and current full scale range, common to all channels, can be selected
by dip-switches (please refer to the Fig. 4.1 for the dip-switches location on the board).

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Dip Switch
(side view)

TABC

4 3 2 1

A)

Out 0

Out 1

Out 2

Out 3

Out 4

Out 5

Out 6

Out 7

Out 8

Out 9

Out 10

Out 11

Channels

Channels

Channels

Channels

Channels

Controller

Channels

B)

Dip Switch

Channels Channels Channels

Channels Channels Channels Channels

TABC

4 3 2 1

Fig. 4.1 – A) Mod. A1732 - A 1832 side view; B) Mod. A1732B - A 1832B top view

In order to select the desired Full Scale Range (FSR) the dip-switches must be set as
illustrated in the following table (refer also to Fig. 4.3).

Dip-switch 1 Dip-switch 2 Voltage FSR Current FSR

OFF ON 6 kV 1 mA
OFF OFF 6 kV 200 μA

Table 4.1 - Full scale range settings

Full scale range selection must be performed before inserting the board into the crate.

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(FS R = 6 k V / 1 mA )

1234

PCB

on

Dip-switch 2 = ON

Dip-switch 1, 3, 4 = OFF

(FSR = 6 kV / 200 μA)

12 4on3

PCB

Dip-switch 1, 2, 3, 4 = OFF

FRONT
PANEL

Fig. 4.2 – Full scale range dip-switch top view

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APPENDIX A

Notes for Mod. A1832 E

Each A1832 E channel is provided with an "HV EN" input (on the right side of the SHV
connector) that disables the channel when the two pins are not shorted (jumper
removed).

upper

pin

HV E N

VCC

ch. i

1 kΩ

100 kΩ

to CONTROL

LOGIC (TTL)
0=ENABLED

100 nF

Fig. A.1 – Mod. A1832 E channel individual enable

When the channel is disabled, the voltage output (if ON) drops to zero at the maximum
rate available. If the jumper is removed the channel remains OFF and any attempt to turn
the channel ON will result unsuccessful.

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