Caen A 1735 Technical document

Technical
Information
Manual
MOD. A 1735 - A 1835
A 1735B - A 1835B
12/28 CHANNEL
HV BOARDS
MANUAL REV.8
24 March 2014
Revision n. 8
NPO:
00101/00:17XXx.MUTx/08

CAEN will repair or replace any product within the guarantee period if the Guarantor declares that the
productis defective dueto workmanshipormaterials andhas notbeencausedbymishandling,negligence
on behalfof the User, accidentor anyabnormal 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 rightto change partially or entirely the contents of this Manual at any time and without giving
any notice.
Disposal of the Product
The productmust never be dumped in the Municipal Waste. Please check your local regulations for
disposal of electronics products.
Made In Italy : We stress the fact that all the boards are made in Italybecause in this globalized world,where
gettingthe lowestpossiblepriceforproducts sometimes translates into poor payand working conditions for the
peoplewhomakethem,atleastyou knowthat who made your board was reasonablypaid and worked in a safe
environment. (this obviously applies only to the boards marked "made in italy", we can not attest to the
manufacturing process of"third party"boards).

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TABLEOFCONTENTS
1. MOD. A1735 - A1835 HV BOARDS.....................................................................................................................5
1.1 FUNCTIONAL DESCRIPTION.....................................................................................................................................5
1.2 CHANNEL CHARACTERISTICSTABLE....................................................................................................................6
1.3 FRONT PANEL ...........................................................................................................................................................7
1.4 TECHNICAL SPECIFICATIONS..................................................................................................................................8
1.4.1 Packaging..........................................................................................................................................................8
1.4.2 External connections .........................................................................................................................................8
1.4.3 Displays .............................................................................................................................................................9
1.4.4 Other components..............................................................................................................................................9
2. SAFETY INFORMATION AND INSTALLATION REQUIR EMENTS ...................................................10
2.1 GENERAL SAFETYINFORMATION.........................................................................................................................10
2.1.1 Injury Precautions ...........................................................................................................................................10
2.2 SAFET Y TERMS AND SYMBOLS ONTHE PRODUCT.............................................................................................10
2.3 INSTALLATION........................................................................................................................................................11
3. OPERATING MODES..............................................................................................................................................12
3.1 OUTPUT CONT ROL AND MONITORING..................................................................................................................12
3.2 OUTPUT ENABLE....................................................................................................................................................13
3.3 FULL SCALE RANGE SETTING................................................................................................................................13

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LISTOF FIGURES
FIG.1.1 –MOD.A1735 –A1835 (LEFT) AND MOD.A1735B –A1835B (RIGHT) FRONT PANEL..........................7
FIG.1.2 –MOD.A1735B –A1835B HVMULTIPIN CONNECTOR....................................................................................9
FIG.3.1 –A)MOD.A1735 -A1835 SIDE VIEW;B) MOD.A1735B -A1835BT OP VIEW............................................14
LISTOF TABLES
TABLE 2.1 -CHANNEL CHARACTERISTICSOF THE MOD.A1735 /1735B-A1835/1835B HVBOARDS..................6
TABLE 3.1 -FULL SCALERANGE SETTINGS..........................................................................................................................14

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1. Mod. A 1735 - A 1835 HV Boards
1.1 Functional description
The Mod. A 1735 – A 1835 are single width boards housing 12 HV channels with either
positive (A 1735P – A 1835P) or negative (A 1735N – A 1835N) polarity.
28 channel double width versions (Mod. A 1735B – A 1835B) have either positive
(A 1735BP – A 1835BP) or negative polarity (A 1735BN – A 1835BN)1.
The boards are compatible with the CAEN Universal Multichannel Power Supply System
(SYx527)
The Mod. A 1735 - A 1735B output channels have 1.5 kV / 7 mA full scale range (dip-
switch selectable); the Mod. A 1835 - A 1835B output channels offer either 1.5 kV / 7 mA
or 1.5 kV / 200 µA full scale range (dip-switch selectable).
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 / 500 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 parameter2, namely:
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 SYX527.
The boards are provided with an "HV EN" input that disables the channels when it is not
connected to ground.
1A 1735B – A 1835B are currently out of stock and no longer produced
2Refer to the SYx527 User’s Manuals for details about the TRIPHandling.

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1.2 Channel Characteristics Table
Table 1.1 - Channel characteristics of the Mod. A 1735 / 1735B - A1835 / 1835B HVBoards
Polarity: Positive / Negative depending on purchased version
Output Voltage: 0÷1.5 kV
Max. Output Current: low range 200 µA(Mod. A 1835 - A 1835B)
high range 7 mA
Voltage Set/Monitor Resolution: 100 mV
Current Set/Monitor Resolution: 500 nA(Mod. A 1735 - A1735B)
20 nA / 500 nA depending on currentrange
(Mod. A 1835 – A 1835B)
VMAX hardware: 0÷1.5 kV common for all the board channels
VMAX hardwareaccuracy: ±2% ofFSR
VMAX software: 0÷1.5 kV settable for each channel
VMAX software resolution: 1 V
Ramp Down: 1÷500 Volt/sec,1 Volt/sec step
Ramp Up: 1÷500 Volt/sec,1 Volt/sec step
Voltage Ripple: 3 < 30 mVpp
Voltage Monitor vs. Output Voltage Accuracy: 4±0.2 V ±0.3% of reading
Voltage Set vs. Voltage Monitor Accuracy: 2±0.1 V ±0.3% ofsetting
Current Monitor vs. Output Current Accuracy: 2
±2 µA ±2% ofreading (7 mArange)
±0.1 µA ±
2% ofreading
(200 µA range, Mod. A 1835 - A 1835B)
Current Set vs. Current Monitor Accuracy: 2
±0.5 µA ±2% of setting (7 mArange)
±0.02 µA ±
2% ofsetting
(200 µA range, Mod. A 1835 - A 1835B)
3From 10 Hz to 15 MHz at full load
4From 10% to 90% of Full Scale Range

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1.3 Front Panel
H
V
E
N
0
2
4
6
8
M
A
X
V
7
5
1
3
9
10
11
H
V
O
U
T
P
U
T
S
SCALER
POSITIVE
12 CH
Mod. V560E
Mod. A 1835P
HV EN input
connector
Channel output
connector
Channel LED
SCALER
Mod. V560E
Mod. A1835BP
28 CH
!
HV EN
MAXV
GND GND
GND GND GND
NC NC
NC NC NC
6 NC
0 12 23
8 19
2 14 25
9 20
3 15 26
10 21
4 16 27
11 22
5 17 NC
NC NC
NC NC IINT
GND GND
GND GND IEXT
GND GND
HV ON
HV OUTPUT
MAXV
trimmer
1.5 KV 7/0.2 mA POSITIVE
+
+
1.5 KV 7/0.2 mA
1 13 24
7 18
Fig. 1.1 – Mod. A 1735 – A1835 (LEFT) and Mod. A 1735B – A 1835B (RIGHT) front panel

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1.4 Technical Specifications
1.4.1 Packaging
The Mod. A 1735 – A 1835 modules are housed in a 5 TE-wide, 6U-high mechanics. The
Mod. A 1735B – A 1835B modules are housed in a 10 TE-wide, 6U-high mechanics.
1.4.2 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 1735 – A 1835): Mechanical specifications:
HV coaxial connectors
Radiall SHVR317580-type
Electrical specifications: high voltage output
according to specifications given in Table
2.1, p.6.
CH 0..27 (A 1735B – A 1835B): Mechanical specifications:
Multipin connector Radiall 691803004-type,
52 pin male (to be mated with Radiall
691802002-type5[SCEM 09.41.34.700.2]);
see Fig. 2.2 for pin assignment.
Electrical specifications: high voltage output
according to specifications given in Table
2.1, p.6.
HV EN CONNECTOR Mechanical specifications:
00-type LEMO connector.
Electrical specifications: board ENABLE
input, if connected to ground, the channels
are enabled. Refer to § 3.2, p.13 for further
details.
5Requires 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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Fig. 1.2 – Mod. A 1735B – A 1835B HV Multipin Connector
1.4.3 Displays
CH ON 0..11 LEDs (A 1735 - A1835): Function: they light up as the relevant
channel is on.
Type: red LEDs for positive polarity version;
yellow LEDs for negative polarity version
HV ON LED (A 1735B - A1835B): Function: it lights up if at least one output
channel is on.
Type: red LED for positive polarity version;
yellow LED for negative polarity version
1.4.4 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.
+
+
GND
NC
0
1
2
3
4
5
NC
GND
GND
NC
6
7
8
9
10
11
NC
GND
GND
GND
NC
12
13
14
15
16
17
NC
GND
GND
NC
NC
18
19
20
21
22
NC
GND
GND
GND
NC
23
24
25
26
27
NC
IINT
IEXT

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2. Safety information and installation requirements
2.1 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.
2.1.1 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.
2.2 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.

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•CAUTION indicates a hazard to property including the product.
The following symbols may appear on the product:
DANGER
ATTENTION
High Voltage
Refer to Manual
2.3 Installation
The Mod. A 1735 – A 1835 are single-width boards which can be inserted in any slot of
the SYX527 crate. The Mod. A 1735B – A 1835B are double-width boards which occupy
two SY 1527 slots each. At power ON the SYX527 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.

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3. Operating modes
The Mod. A 1735 – A 1835 and A 1735B – A 1835B boards can be controlled, either
locally or remotely, through the SYX527 software interface. For details on SYX527
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 1735 and A 1835 BOARDS REQUIRE
SYX527 FIRMWARE VERSION 1.09.04 OR LATER
3.1 Output control and monitoring
For each output channel, it is possible, through the SYX527 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 SYX527 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 SYX527 when monitoring the board status:
•UNDER_TEMP (board temperature < 5°C )
•OVER_TEMP (board temperature > 65°C)
3.2 Output Enable
The following procedures must be performed in order to enable the board’s operation:
-Provide the "HV EN" connector with a 50 Ohm termination.
-Provide short circuit between Pin 51 and Pin 52 (IINT and IEXT) of the HV Multipin
Connector (see Fig. 2.2); this is a safety feature to verify that the connector is plugged
and the channels are connected to their loads (see § 1.4.2). This operation is not
necessary if the S1 pins on the PCB are short circuited.
Such procedures are unnecessary if the S2 pins on the PCB are short circuited.
S1 and S2 are placed on the PCB’s lower edge, just behind the front panel.
When the channels are disabled the voltage outputs drop to zero at the maximum rate
available; when the output disable cause is removed, the channels remain OFF until the
User turns them ON via software.
3.3 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. 3.1 for the dip-switches location on the board).

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Channels
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
Controller
Channels
Channels
Dip Switch
(side view)
T A B C
43 2 1
A)
B)
Dip Switch T A B C
4 3 21
Channels Channels Channels Channels
Channels Channels Channels
Fig. 3.1 – A) Mod. A1735 - A 1835 side view; B)Mod. A1735B - A 1835B top view
In order to select the desired Full Scale Range (FSR) the dip-switches must be set as
illustrated in the following table.
Dip-switch 1
Dip-switch 2
Voltage FSR
Current FSR
OFF
ON
1.5 kV
7 mA
OFF
OFF
1.5 kV
200 µA
Table 3.1 - Full scale range settings
Full scale range selection must be performed before inserting the board into the crate.