Stahl-electronics HS-500 User Manual

HS-500

Low Noise High Voltage Switch

HS-500_User_Manual_1_41.doc

18 - January2018

Data Sheet & User Manual

Model Number HS-500 Rev. 1.41

Typical Applications:

● piezo elements

● beam line electrodes / ion optics

● ion traps

Features:

● fast low noise switches (SPDT style)

● max. 500V switching voltage with TTL/CMOS level control

● 35ns intrinsic rise/fall time

www.stahl-electronics.com

HS-Series User Manual HS-500, Rev 1.41

www.stahl-electronics.com phone: [phone], fax: [phone]

2

TABLE OF CONTENTS

1. Safety Hints ………………………………….…………………………………… 3

2. General Information and Overview………………….………………………….. 4

2.1 Purpose and Description of the Device…………………………….. 4

2.2 Functional Principle and Block Diagram…………………………. 4

2.3 Device Variety……………………………………………………… 5

3. Installation ……………………………………………………………………..… 6

3.1 Mechanical and Electrical Installation……………………………… 6

4. Operation and Control Elements ……………………………………………….. 7

4.1 Elements on the front plate………………………………………… 7

4.2 Elements on the rear side..………………………………………… 7

4.3 Output Characteristics……………………………………………… 8

5. Maintenance………………………………………….…………………………. 10

6. Specifications……………………………………………………………………. 11

Declaration of Conformity………………………………………………………………. 12

HS-Series User Manual HS-500, Rev 1.41

www.stahl-electronics.com phone: [phone], fax: [phone]

3

1. Safety Hints

Read all installation, operation, and safety
instructions

Prior to operation, thoroughly review all safety,
installation, and operating instructions accompanying

this equipment.
Rear side switch turns device completely
off

If the device is not in use for a longer time, it is

recommended to turn the mains switch at rear side off.
This equipment must be connected to an
earth safety ground

This product is grounded through the grounding

conductor of the power cord. To avoid electrical

hazard, the grounding conductor must be connected to

protective earth ground.
Do not modify the unit Do not make electrical or mechanical modifications to

this unit.
Change cabling only when device is off Changing the cabling, when voltages are present at the

outputs can lead to formation of harmful sparks.
Do not operate in wet/damp conditions To avoid electric shock hazard, do not operate this

product in wet or damp conditions. Protect the device

from humidity and direct water contact.
Beware of external magnetic fields External magnetic fields can impair, damage or even

destroy this device. A maximum external field strength

of no more than B = 5mT is admissible. Having placed

the device at any time into an external magnetic of

bigger B = 5mT (regardless if power was turned on or

off) can lead to severe overheating of the device and

severely increased hazard of fire.
Service is to be performed by qualified
service persons only

All servicing on this equipment must be carried out by

factory-qualified service personnel only.
Do not block chassis ventilation openings Slots and openings in the chassis are provided for

ventilation purposes to prevent overheating of the

equipment and must not be restricted.

All case vents should continuously be cleared in order

to prevent overheating.
Operate carefully with respect to risk of
electrical shock

This device can produce high voltages at its output

lines, which are harmful in case of direct touch with the

human body or other external circuitry. Care must be

taken to avoid unintentional touching of any output line

to the human body or any devices which might be

endangered by high voltages.
Routinely cleaning from dust After long operation, or operation in a dusty

environment it is strongly recommended to have the

internal parts of the device cleaned by the

manufacturer, or an appropriately qualified workshop

in order to reduce the hazard of overheating.
No outdoor operation Outdoor operation of the device is not admissible.

HS-Series User Manual HS-500, Rev 1.41

www.stahl-electronics.com phone: [phone], fax: [phone]

4

2. General Information and Overview

2.1 Purpose and Description of the Device

Purpose of the HS series devices is the fast switching of piezo elements, electrodes, electrostatic lenses
or beam deflectors, etc. Unlike DC power switches, the outputs expect capacitive loads and only small
permanent (continuous) currents. The outputs are optimized for high stability, precision and very low
noise. The HS series switches are housed in standard 19-inch rack-mount cases. They are available in
single-channel or dual-channels versions. In the dual channel version two completely identical
switched are housed inside the same housing. These two switches are completely independent.

fig 2.1: front view of a HS-200/HS-500 device (DUAL version)

2.2 Functional Principle and Block Diagram

The following scheme displays a block diagram of the internal structure and illustrates the functional
principle. The control input (BNC socket on front plate) defines the position of the internal high
voltage switch, which connects either input A or input B to the output. A digital signal (TTL/CMOS
level 0V/5V) may be applied to this control input at a rate between 0Hz (static operation) to 2kHz. A
three-position manual switch on the front side allows to override the digital control signal. The high
voltage switching elements inside the device are implemented as MOSFET-transistors, allowing fast
switching transitions in the order of 100ns and less.

fig 2.2: Block diagram of a HS-200/HS-500 device. Inside the DUAL version, the scheme exists twice, i.e. there
are two independent switches.

Unlike high voltage pulse-generators the internal switch circuitry is implemented as fast static switch,
which means that the applied control input level defines the (static) switch position as illustrated in the
scheme above. The output is connected to the selected input by a (transistor based) resistor. The non­selected input is isolated from the output by a high isolation resistance.