ElmoMC SimplIQ Analog Servo Amplifiers-Violin Installation

Violin

Installation Guide

April 2008 (Ver. 2.3)

www.elmomc.com

Important Notice

This guide is delivered subject to the following conditions and restrictions:

 This guide contains proprietary information belonging to Elmo Motion Control Ltd.

Such information is supplied solely for the purpose of assisting users of the Violin
servo amplifier.

 The text and graphics included in this manual are for the purpose of illustration and

reference only. The specifications on which they are based are subject to change
without notice.

 Information in this document is subject to change without notice. Corporate and

individual names and data used in examples herein are fictitious unless otherwise
noted.

Doc. No. MAN-

Copyright  2008

Elmo Motion Control Ltd.

All rights reserved.

Violin Catalog Number

VIO-XX/YYYV

Continuous

Output

Current

.

Maximum
Operating

Voltage

Mode

_ = Current
V = Velocity

Revision History

Ver. 2.3 April 2008 Updated Power Ratings Table in Appendix
Ver. 2.22 Mar. 2007 Correction to figure 2-1 and product part number on page 3-1
Ver. 2.2 May 2006 Change to dimensions diagram
Ver. 2.1 Aug. 2004 50 VDC models upgraded to 60 VDC models

VIOIG

Ver. 2.0 April 2003 Manual name revised to VIOlin User Guide and look updated
Ver. 1.0 May 1999 Initial release of VIO Series Installation and Operating Manual

Elmo Motion Control Ltd.

64 Gisin St., P.O. Box 463
Petach Tikva 49103
Israel

Tel: [phone]
Fax: [phone]

[e-mail]

Elmo Motion Control Inc.

1 Park Drive, Suite 12
Westford, MA 01886
USA

Tel: [phone]
Fax: [phone]

[e-mail]

Elmo Motion Control GmbH

Steinkirchring 1
D-78056, Villingen-Schwenningen
Germany

Tel: [phone]
Fax: [phone]

[e-mail]

www.elmomc.com

Violin Installat ion Guide Contents

MAN-VIOIG (Ver. 2.3)

Contents

Chapter 1: Safety Information...............................................................................................1-1

1.1 Warnings .........................................................................................................................1-2

1.2 Cautions ..........................................................................................................................1-2

1.3 Conformance to Standards............................................................................................ 1-2

1.4 Warranty Information....................................................................................................1-3

Chapter 2: Introduction...........................................................................................................2-1

2.1 Product Description.......................................................................................................2-1

2.2 Standard Features ..........................................................................................................2-1

2.3 Fault Protection .............................................................................................................. 2-1

2.4 How to Use this Guide ..................................................................................................2-3

Chapter 3: Installation ............................................................................................................3-1

3.1 Site Requirements...........................................................................................................3-1

3.2 Unpacking the Amplifier Components........................................................................3-1

3.3 Violin Dimensions.......................................................................................................... 3-2

3.4 Mounting the Violin.......................................................................................................3-3

3.4.1 Mounting the Heatsink .......................................................................................3-3

3.4.2 Mounting on the PC Board ................................................................................. 3-3

3.5 Wiring the Violin............................................................................................................3-4

3.6 Connections ....................................................................................................................3-4

3.6.1 Pin Functions........................................................................................................ 3-4

3.6.2 Connecting a Non-isolated Violin to an Isolating Power Transformer.......... 3-7

3.7 DC Power Supply...........................................................................................................3-7

i

Chapter 4: Servo Control Operation.....................................................................................4-1

4.1 Current Command Input...............................................................................................4-1

4.2 CFM .................................................................................................................................4-1

4.3 Current Gain Control (CGC).........................................................................................4-2

4.4 External Current Limit - Continuous (ECLC) .............................................................4-3

4.4.1 External Voltage................................................................................................... 4-3

4.4.2 External Resistor .................................................................................................. 4-3

4.5 External Current Limit - Peak (ECLP)..........................................................................4-3

4.5.1 External Voltage................................................................................................... 4-3

4.5.2 External Resistor .................................................................................................. 4-4

4.6 Latch Mode (LM)............................................................................................................4-4

4.7 Amplifier Enable Logic..................................................................................................4-4

4.8 Status Indications........................................................................................................... 4-5

Appendix: Technical Specifications....................................................................................A-1

A.1 Power Ratings................................................................................................................A-1

A.2 Electrical Specifications ................................................................................................A-2

A.3 Mechanical Specifications.............................................................................................A-2

A.4 Environmental Conditions........................................................................................... A-3

Violin Installat ion Guide

MAN-VIOIG (Ver. 2.3)

Chapter 1: Safety Information

In order to achieve the optimum, safe operation of the Violin servo amplifier, it is
imperative that you implement the safety procedures included in this user guide. This
information is provided to protect you and to keep your work area safe when operating
the Violin and accompanying equipment. Read this chapter carefully before you begin
the installation process.

Ensure that all system components are connected to earth ground. Electrical safety is
provided through a low-resistance earth connection.

Only qualified personnel may install, adjust, maintain and repair the servo amplifier. A
“qualified person” has the knowledge and authorization to perform tasks such as
transporting, assembling, installing, commissioning and operating motors.

The Violin servo amplifier contains electrostatic-sensitive components that can be
damaged if handled incorrectly. To prevent any electrostatic damage, avoid contact with
highly insulating materials, such as plastic film and synthetic fabrics. Place the product
on a conductive surface and ground yourself in order to discharge any possible static
electricity build-up.

1-1

To avoid any potential hazards that may cause severe personal injury or damage to the
product during operation, keep all covers and cabinet doors shut.

The following safety symbols are used in this manual:

Warning:

This information is needed to avoid a safety hazard, which might cause
bodily injury.

Caution:

This information is necessary for preventing damage to the product or to
other equipment.

Note:

This is auxiliary information that ensures the correct operation of the
equipment.

Violin Installat ion Guide Safety Information

MAN-VIOIG (Ver. 2.3)

1-2

1.1 Warnings

Cleaning after soldering

To avoid the damage of the product's acrylic coating the Violin must not

be cleaned after soldering by dissolving solvents and /or "water"
cleaning process. For more details:

http://www.elmomc.com/applications/article/Soldering-and-

Cleaning_Application-Note.pdf

To avoid electric arcing and hazards to personnel and electrical contacts,
never connect/disconnect the servo amplifier while the power source is

on.

Power cables can carry a high voltage, even when the motor is not in
motion. Disconnect the Violin from all voltage sources before it is opened
for servicing.

After shutting off the power and removing the power source from your
equipment, wait at least 5 minutes before touching or disconnecting parts
of the equipment that are normally loaded with electrical charges (such as
capacitors or contacts). Measuring the electrical contact points with a
meter before touching the equipment is recommended.

1.2 Cautions

The Violin servo amplifier contains hot surfaces and electrically-charged
components during operation.

The maximum DC power supply connected to the instrument must comply
with the parameters outlined in this guide.

1.3 Conformance to Standards

The Violin servo amplifier has been developed, produced, tested and documented in
accordance with the relevant standards. Elmo Motion Control is not responsible for any
deviation from the configuration and installation described in this documentation.
Furthermore, Elmo is not responsible for the performance of new measurements or
ensuring that regulatory requirements are met.

The Violin servo amplifier is intended for incorporation in a machine or end product. The
actual end product must comply with all safety aspects of the relevant requirements of
the European Safety of Machinery Directive 89/392/EEC as amended, and with those of
the most recent versions of standards EN60204-1 and EN292-2 at the least.

Violin Installat ion Guide Safety Information

MAN-VIOIG (Ver. 2.3)

1-3

According to Annex III of Article 13 of Council Directive 93/68/EEC, amending Council
Directive 73/23/EEC concerning electrical equipment designed for use within certain
voltage limits, the Violin meets the provisions outlined in Council Directive 73/23/EEC.
The party responsible for ensuring that the equipment meet the limits required by EMC
regulations is the manufacturer of the end product.

1.4 Warranty Information

The products covered in this manual are warranted to be free of defects in material and
workmanship and conform to the specifications stated either within this document or in
the product catalog description. All Elmo amplifiers are warranted for a period of 12
months from the time of installation, or 18 months from time of shipment, whichever
comes first. No other warranties, expressed or implied — and including a warranty of
merchantability and fitness for a particular purpose — extend beyond this warranty.

Violin Installat ion Guide

MAN-VIOIG (Ver. 2.3)

Chapter 2: Introduction

This user guide is intended for the design engineer who is integrating an Elmo Motion
Control Violin servo amplifier into a machine.

2.1 Product Description

The Violin series of miniature servo amplifiers for DC brush motors incorporates custom
mixed analog/digital ICs and a hybrid power stage. The basic configuration is a current
mode amplifier targeting the OEM market. As such, no trimmers are used in the basic
version. The Violin amplifier meets UL508c and the relevant CE regulations.

The power stage is implemented on a single ceramic substrate. This design enables very
high thermal conductivity, high current carrying capacity, improved EMC and good
mechanical strength. The control section is implemented by dedicated custom ICs that
contribute to higher and enhanced performance.

2-1

2.2 Standard Features

 Operation in current mode (velocity mode option available)

 Internal DC-to-DC converter, which allows for operation from a single supply

 Zero deadband

 Excellent linearity

 One differential input

 Motor current monitor

 Current gain change for low inductance motors

 Remote current gain control

 Current feedback multiplier for low current motors

 Status indication and remote control functions by four open collector transistors

 External continuous and peak current-limit adjustments

 Interface via soldering pins

 Package: plated-copper base plate, plastic housing, UL94V0 recognized

 Ultra-compact size

2.3 Fault Protection

Built-in protection against possible fault conditions, including:

 Shorts between the outputs or between each output and the power input/return

 Over-temperature

 Under/over voltage

 Failure of internal power supplies

 Latch mode for each protective feature

Violin Installat ion Guide Introduction

MAN-VIOIG (Ver. 2.3)

2-2

Figure 2-1: Violin Block Diagram

Violin Installat ion Guide Introduction

MAN-VIOIG (Ver. 2.3)

2-3

2.4 How to Use this Guide

Installation is the first step in integrating and operating the Elmo Violin servo amplifier.
After carefully reading the safety instructions in the first chapter, the following chapters
provide you with installation instructions as follows:

Chapter 3, Installation, provides step-by-step instructions for unpacking, mounting and

connecting the Violin.

Chapter 4, Servo Control Operation, explains how to control the operation of the servo

amplifier.

The Appendix, Technical Specifications, lists all the drive ratings and specifications.

Violin Installat ion Guide

MAN-VIOIG (Ver. 2.3)

Chapter 3: Installation

3.1 Site Requirements

You can guarantee the safe operation of the Violin by ensuring that it is installed in an
appropriate environment.

Feature Value

Ambient operating temperature 0 °C – 50 °C (32 °F – 122 °F)

Maximum case temperature 87 °C (188° F)

Note: Models for extended environmental conditions are available.

3.2 Unpacking the Amplifier Components

3-1

To unpack the Violin:

Carefully remove the servo amplifier from the box and the Styrofoam.

1. Check the amplifier to ensure that there is no visible damage to the instrument. If
any damage has occurred, report immediately to the carrier that delivered your
amplifier.

2. To ensure that the Violin you have unpacked is the appropriate type for your
requirements, find the part number sticker on the side of the Violin:

The P/N number at the top gives the type designation as follows:

VIO-XX/YYYV

.

Mode

Continuous

Output

Current

Maximum
Operating

Voltage

_ = Current
V = Velocity

3. Verify that the Violin type is the one that you ordered, and ensure that the voltage
meets your specific requirements.

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MAN-VIOIG (Ver. 2.3)

3-2

3.3 Violin Dimensions

Figure 3-1: Violin Dimensions

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MAN-VIOIG (Ver. 2.3)

3-3

3.4 Mounting the Violin

3.4.1 Mounting the Heatsink

The Violin dissipates its heat by natural convection, up to loads of 500 W. For higher
output loads, the amplifier should be mounted on an additional heatsink or cooled by
fan. There are two 4.5 mm holes in the base plate for mounting an additional heatsink
(see Figure

3.4.2 Mounting on the PC Board

When mounting the Violin on a PC board, four screws (in addition to the solder pins)
may be installed to provide a mechanical connection. It is important to provide a spacer if
any components are located above the amplifier. Failure to do so can warp the PC board
or puncture the amplifier case. When selecting screws, the following specifications
should be used. If a spacer has been added, the screw length must be calculated to
penetrate the case by no more than 2.6 mm.

3-1).

Screw Type: Phillips Pan Head Self-tapping (for plastic) screw – Nickel-plated Steel.

Meets standards ISO 1478, EN 21478, or DIN 7970.

d ST2.2

L 4.5*

P 0.8

dk 4.2

k 1.8

m≈ 2.6

Phillips size 1

*4.5 mm is typical for mounting on a
PC board assembly without spacers.

Table 3-1: Dimensions in Millimeters

Basic
Diameter

ISO
Nr.

Pitch
P

Main Diameter Minor Diameter Flat End Diameter

D

D

1max

D

1min

D

2max

D

2min

D

3max

3min

ST2.2 2 0.8 2.24 2.1 1.63 1.52 1.47 1.37

Table 3-2: Size Limits for Tapping Screw Thread

Violin Installat ion Guide Installation

MAN-VIOIG (Ver. 2.3)

3-4

3.5 Wiring the Violin

Motion Controlle r

Controller's common

Motor

Chassis

Power wires twiste d and shielded

A

B

See remark belo w

CREF+
CREF-

CMRET

M1
M2

VIO

Isolating transformer

(-)

Power

Supply

(+)

The controller common mu st be connected to the CMRET whenever the common mode
difference is over 6V.

Figure 3-2: Basic Wiring

PR,

Power Return (-)

Vp+

Heatsink

3.6 Connections

3.6.1 Pin Functions

The Violin connections are described in the following figure and tables.

Figure 3-3: Violin Connector Locations

Violin Installat ion Guide Installation

MAN-VIOIG (Ver. 2.3)

3-5

Pin Function Remarks

VP+ Positive power input

PR Power input return

M1

M2

Motor power output 1

Motor power output 2 Output is positive when pin J1/1 is positive

relative to pin J1/2.

Table 3-3: Violin Power Connections

Pin #/
Short Form

1

CREF+

2

CREF-

3

ECLC

4

ECLP

5

ECLRET

6

CM

7

CMRET

8

CGC

9

CGCRET

10

CFM

Function

Current command
input ( + )

Remarks

Positive input of a differential amplifier:

 Input operating voltage range: ±3.75 V

 Maximum input voltage: ±20 V

(see section 4.1)

 Maximum common mode voltage: ±6 V

(referred to as CMRET)

 Differential input impedance: 40 kΩ

Current command
input ( - )

External current
limit - continuous

Negative input of a differential amplifier.
Specification as for pin J1/1.

External voltage scales down the rated value:

 Voltage range: 0 V to 3.75 V (3.75 V = rated Ic).

 Internally limited to the rated value.

External current
limit – peak

External voltage scales down the rated value.

 Voltage range: 0 V to 3.75 V (3.75V = rated Ip).

 Internally limited to the rated value.

Current limits

Return for the current limit signals.

return

Current monitor Analog output with a scale of ± 3.9 V for ± Ip.

Output resistance: 10 kΩ

Current monitor

Return for the current monitor (CM) signal.

return

Current gain
change

Shorting this pin to the CGCRET pin (J1/9)
reduces the proportional gain (P) of the current
loop by 70%.

Current gain

Return for CGC signal

change return

Current feedback
multiplier

Shorting this pin to pin J1/8 (CGC) multiplies
the current feedback signal by 2.

Table 3-4: Connector J1

Violin Installat ion Guide Installation

MAN-VIOIG (Ver. 2.3)

3-6

Pin #/
Short Form

1

LMRET

2

LM

3

EN+

4

EN-

5

SORET

6

SORET

7

AOK

Function

Remarks

Latch mode return Return for Latch mode (LM)

Latch mode Latch mode input

Enable (+) Positive voltage input of the "Amplifier Enable”

function. To enable operation of the amplifier,
the opto must be switched on by applying
voltage between this pin (+) and pin J2/4 (-).
The opto is isolated from the amplifier. See

Figure 2-1.

 Minimum “ON” voltage: 3 V , current

consumption 0.6 mA.

 Maximum “ON” voltage: 15 V , current

consumption 5.4 mA.

Enable (-) Negative voltage input of the "Amplifier

Enable” function. Opto isolated from the
amplifier. For details, see pin J2/3.

Status output
return

Status Outputs Common for AOK, SO1, SO2,
SO3.

Isolated from the circuit common. For details,
see Figure 2-1.

Status output
return

Status Outputs Common for AOK, SO1, SO2,
SO3.

Isolated from the circuit common. For details,
see Figure 2-1.

Amplifier OK “Amplifier OK” indication output pin. When the

amplifier is at normal operating conditions this
output is in “active Low “ state. When a failure
occurs this output is changed to “open” state.
Opto isolated, open collector NPN type. See

Figure 2-1.

8

SO1

9

SO2

10

SO3

 Maximum voltage = 30 V

 Maximum current = 8 mA.

 “On” voltage: V

OUT(On)

< 0.8 V

Status output 1 Status indication output 1. Specification as in pin

J2/7.

Status output 2 Status indication output 2. Specification as in pin

J2/7.

Status output 3 Status indication output 3. Specification as in pin

J2/7.

Table 3-5: Connector J2

Violin Installat ion Guide Installation

MAN-VIOIG (Ver. 2.3)

3-7

3.6.2 Connecting a Non-isolated Violin to an Isolating

Power Transformer

Be sure to ground:

 DC power common

 Motor chassis

 Amplifier heatsink

Do not ground the control common, which is internally connected to the power common.

Grounding the control common will create a ground loop.

3.7 DC Power Supply

The DC power supply can be at any voltage in the range defined in the technical
specifications (Appendix of this guide). The supply source must comply with the safety
aspects of the relevant requirements, in accordance with the most recent version of the
standard EN60950 or equivalent Low Voltage Directive Standard, all according to the
applicable over-voltage category. If the power source to the power supply is the AC line
(through a transformer), safety margins must be considered, in order to avoid activating
the under/over voltage protection due to line variations and/or voltage drop under load.

In addition to the above, the transformer must comply with the safety aspects of the
relevant requirements in accordance with the most recent version of the standard
EN60742 (Isolating and Safety Isolating Transformers). The nominal DC bus voltage
should be in the following range:

1.2 V

dcmin

< Vdc < 0.9

Vdcmax

where:

V

Vdcmax

is the minimum DC bus

dcmin

is the maximum DC bus

The recommended minimum power supply capacitance for single-phase connections is
as follows:

Amplifier Voltage Range 50 - 55 V 100 V 200 V

Recommended capacitance 5600 µF 3300 µF 1500 µF

The transformer power should be calculated such that it will be able to deliver power to
the amplifier (including peak power) without significant voltage drops.

The power supply should be located as close as possible to the amplifier. The maximum
distance is 30 cm (1 foot). While driving high-inertia loads, the power supply must be
equipped with a shunt regulator; otherwise, the amplifier will be disabled whenever the
capacitors are charged above the maximum voltage.

Violin Installat ion Guide

MAN-VIOIG (Ver. 2.3)

Chapter 4: Servo Control Operation

4.1 Current Command Input

The Violin has a single differential input. The input operating voltage range is ± 3.75 V,
meaning that a 3.75 V signal will result in a fully rated peak current. The current limit
circuits will override this signal if the peak duration exceeds 2.7 seconds and/or the
required current exceeds the values set by the ECLC and ECLP signals. If the input
command voltage exceeds 3.75 V, input scaling must be implemented by adding a pair of
external resistors, according to the following formula:

4-1

R

= (5.33 * Vin) - 20

in (KΩ)

Be careful not to apply input voltage above the maximum allowed input voltage as this
will cause the input operational amplifier to operate beyond its limits (+20 V) and in
extreme cases, may even damage it.

4.2 CFM

The amplifier is equipped with a current feedback multiplier (CFM). Connecting pin
J1/10 to J1/8 multiplies the signal of the current feedback by 2 and consequently causes
the following changes to occur:

 Current gains are divided by 2

 Current monitor is multiplied by 2

 Current limits are divided by 2

This function should be activated whenever the rated current and the peak current of the

motor are less than 50% of the amplifier rated continuous and peak limits, respectively.

Continuous
Current limit

Peak Current
Limit

Current
Gain(A/V)

Current
Monitor
(V/A)

Differential
Input
Impedance

Without CFM Ic Ip Ip/3.75 3.9/Ip 40 kΩ

With CFM Ic/2 Ip/2 Ip/7.5 7.8/Ip 40 kΩ

Table 4-1: CFM Effects

 The default (pin J1/10 left open) is the low current feedback.

 For permanent selection, a simple short is recommended.

 For remote selection, the scheme in Figure

4-1 should be used.

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MAN-VIOIG (Ver. 2.3)

4.3 Current Gain Control (CGC)

The Violin amplifier is equipped with Current Gain Control (CGC) for improved
performance of low induction motors. Connecting pin J1/8 to J1/9 reduces the gain of
the current loop, thus enabling the use of low inductance motors without the insertion of
an additional inductor. The default (pin J1/8 left open) is high gain.

Shorting this pin to the circuit common pin (J1/9) reduces the proportional gain (P) of the
current loop by approx. 70%.

For permanent selection, a simple short is recommended. For remote selection, the
following scheme should be used.

4-2

Figure 4-1: CFM and CGC Remote Control

The following table should be used for calculating minimum inductance values.

Minimum Inductance for High Gain Minimum Inductance for Low Gain

5/60 L

10/60 L

15/60 L

25/60 L

10/100 L

15/100 L

20/100 L

6/200 L

10/200 L

15/200 L

Load (millihenry)

Load (millihenry)

Load (millihenry)

Load (millihenry)

Load (millihenry)

Load (millihenry)

Load (millihenry)

Load (millihenry)

Load (millihenry)

Load (millihenry)

> 12*10

> 6*10

> 4*10

> 2.4*10

> 9*10 -3 * V

> 6*10 -3 * V

> 4*10 -3 * V

> 16.5*10 -3 *V

> ___*10 -3 * V

> 6.5*10 -3 * V

-3

-3

* V

-3

* V

-3

* V

supply (Volt)

supply (Volt)

supply (Volt)

* V

supply (Volt)

supply (Volt)

supply (Volt)

supply (Volt)

supply (Volt)

L

L

L

L

L

L

L

supply(Volt)

supply (Volt)

Load (millihenry)

Load (millihenry)

Load (millihenry)

Load (millihenry)

Load (millihenry)

Load (millihenry)

Load (millihenry)

L

Load (millihenry)

L

Load (millihenry)

L

Load (millihenry)

> 4.8*10 -3 * V

> 2.4*10 -3 * V

> 1.6*10 -3 * V

> 0.9*10 -3 * V

> 2.2*10 -3 * V

> 1.5*10 -3 * V

> 1.1*10 -3 * V

> 4*10 -3 * V

supply (Volt)

> ___*10 -3 * V

> 1.6 *10 -3 * V

supply (Volt)

supply (Volt)

supply (Volt)

supply (Volt)

supply (Volt)

supply (Volt)

supply (Volt)

supply (Volt)

supply (Volt)

Table 4-2: Minimum Inductance Values

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MAN-VIOIG (Ver. 2.3)

4.4 External Current Limit - Continuous (ECLC)

The continuous current limit of the Violin amplifier can be scaled down by an external
voltage or by an external resistor connected from pin J1/3 (ECLC) to pin J1/5 (ECLRET).

4.4.1 External Voltage

An external positive voltage (0 to 3.75 V) to terminal J1/3 (ECLC) in reference to terminal
J1/5 (ECLRET) will control the continuous current limit from zero to Ic(nom).

V

V

ECLC

IC(new) =

IC(new) =

ECLC

3.75V

3.75V

* Ic(nom)

* Ic(nom)

4-3

 The voltage is internally clamped to 3.75 V whenever the external V

is greater

ECLC

than 3.75 V.

 The external voltage source must be able to source/ sink at least ±0.2 mA.

 The maximum absolute V

ECLC

is 12 V.

4.4.2 External Resistor

Connect an external resistor between terminal J1/3 (ECLC) and terminal J1/5 (ECLRET).
The resistor value is given by:

Ic(new)

R

R

R

(Kohm) = 37.4 *

(Kohm) = 37.4 *

(Kohm) = 37.4 *

ECLC

ECLC

ECLC

 0 < R

 At R

< 36.4 K (1/8 Watt)

ECLC

greater than 36.4 K, the current limit will be internally clamped to the

ECLC

Ic(new)

Ic(nom)

Ic(nom)

- 1

- 1

nominal value.

 I

is the nominal continuous current limit of the amplifier.

C(nom)

4.5 External Current Limit - Peak (ECLP)

The peak current limit of the Violin amplifier can be scaled down by an external voltage
or by an external resistor connected between pin J1/4 (ECLP) and pin J1/5 (ECLRET).

4.5.1 External Voltage

An external positive voltage (0 to 3.75 V) to terminal J1/4 (ECLP) in reference to terminal
J1/5 (ECLRET) will control the peak current limit from zero to Ip(nom).

V

V

ECLP

Ip(new) =

Ip(new) =

 The voltage is internally clamped to 3.75 V whenever the external V

3.75 V.

 The external voltage source must be able to source/ sink at least ±0.2 mA.

 The maximum absolute V

ECLP

3.75V

3.75V

* Ip(nom)

* Ip(nom)

ECLP

is 12 V.

is higher than

ECLP

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MAN-VIOIG (Ver. 2.3)

4.5.2 External Resistor

Connect an external resistor between terminal J1/4 (ECLP) and terminal J1/5 (ECLRET).
The resistor value is given by:

Ip(new)

R

R

R

(Kohm) = 37.4 *

(Kohm) = 37.4 *

(Kohm) = 37.4 *

ECLP

ECLP

ECLP

Ip(new)

Ip(nom)

Ip(nom)

- 1

- 1

4-4

 0 < R

 At R

< 36.4 K (1/8 Watt)

ECLP

greater than 36.4 K, the current limit will be internally clamped to the

ECLP

nominal value.

 I

is the nominal peak current limit of the amplifier.

P(nom)

4.6 Latch Mode (LM)

By connecting J2/2 to J2/1, the amplifier can be latched to Disable mode whenever a
Short or Over Temperature failure occurs. Disabling the amplifier temporarily (by
removing the power from Enable pins J2/3 and J2/4) resets the latch. Be sure to restore
the Enable connection when the reason for the event no longer exists. For permanent
selection, a simple short is recommended. For remote selection, use the following scheme.

Figure 4-2: LM Remote Control

4.7 Amplifier Enable Logic

Pins J2/3 and J2/4 are the inputs of an opto-coupler, which must be energized to enable
operation of the amplifier. If the Enable input is kept high before turning on the
amplifier, the amplifier power output will be active immediately upon power on.

Violin Installat ion Guide Servo Control Operation

MAN-VIOIG (Ver. 2.3)

4.8 Status Indications

The following table lists the Violin amplifier status indications.

4-5

Function

1 Amplifier OK

Latch
Option AOK

SO1

SO2

SO3

N/A Low Open collector Open collector Open collector

(AOK)

2 External disable No Low Low Open collector Low

3 Current limit No Low Open collector Open collector Low

4 Short Yes Open collector Low Open collector Low

5 Over

Yes Open collector Open collector Low Low

temperature

6 Internal supplies

No Open collector Low Low Open collector

protection

7 Under voltage No Open collector Low Open collector Open collector

8 Over voltage No Open collector Open collector Low Open collector

9 Shunt* No Low Open collector Low Open collector

10 Power Up Reset No Open collector Open collector Open collector Open collector

* This indication can be used as a digital input for activating an external shunt regulator.

Notes:

 Without latch mode:

The status indications are reset when the fault disappears.

 With latch mode:

The Short and Over Temperature Failure status indications are reset when the
enable signal is temporarily removed from the enable input.

 Multiple faults:

Only the reading of the first fault is reliable. Additional faults add on to the
status outputs and the indication is therefore meaningless.

Table 4-3: Violin Status Indications

Violin Installat ion Guide

MAN-VIOIG (Ver. 2.3)

Appendix: Technical Specifications

A.1 Power Ratings

A-1

Feature

Minimum supply
voltage

Nominal supply
voltage

Maximum supply
voltage

Maximum
continuous power
output

Efficiency at rated
power (at nominal
conditions)

Maximum output
voltage

Maximum
continuous
current (Ic)

Peak current limit

Mounting method

Units

VDC 10 20 40

VDC 50 85 170

VDC 59 95 195

W 290 570 860 1400 950 1400 1900 1170 1900 2900

% >97

Up to 100% of DC bus voltage

A 5 10 15 25 10 15 20 6 10 15

A 2 x Ic

PCB mounted

5/60 10/60

15/60

25/60

10/100

15/100

20/100

6/200

10/200

15/200

A.2 Electrical Specifications

Feature Details

Switching frequency on the load 32 kHz (±5%)

Current loop bandwidth Up to 4 kHz

Current step response < 150 µsec

Peak current duration (full rated peak current) 2.7 sec ±15%

Continuous current limit tolerance -1% +5%

Peak current limit tolerance -1% +5%

Current gain linearity

Current gain accuracy

Current monitor accuracy

Better than ±1% of rated continuous current

Better than ±5% for 0.05 Ic < lmotor > Ip

Better than ±5% for 0.05 Ic < lmotor > Ip

Violin Installat ion Guide

MAN-VIOIG (Ver. 2.3)

A.3 Mechanical Specifications

Feature Details

Size 82 x 47 x 25.4 mm (3.228 x 1.850 x 1.000 in)

Weight 0.18 kg (6.4 oz)

Power pin material Brass with tin plating

Power pin size 1.14 mm (0.45 in) square

Power pin PCB layout 1.8 ± 0.05 mm (0.071 ± 0.002 in)

Signal pin (J1, J2) material Phosphor bronze with 10µ gold plating

Signal pin (J1, J2) size 0.5 ± 0.1 mm (0.02 ± 0.004 in) square

Signal pin (J1, J2) PCB layout 1 ± 0.05 mm (0.04 ± 0.002 in)

A-2

A.4 Environmental Conditions

Feature Details

Ambient operating temperature 0 °C – 50 °C (32 °F – 122 °F)

Maximum case temperature 87 °C (188 °F)

Storage temperature -40 °C to 100 °C (-40 °F to +212 °F)

Operating humidity 90% non-condensing

Maximum operating altitude 2,000 m (6562 feet)

Storage humidity 98% non-condensing

Protective coating Applied to all circuits