Eurotherm Drives 631 User manual

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All rights strictly reserved. No part of this document may be stored in a retrieval system, or transmitted in any form or
by any means to persons not employed by a Eurotherm group company without written permission from Eurotherm
Drives Ltd.
Although every effort has been taken to ensure the accuracy of this document it may be necessary, without notice, to
make amendments or correct omissions. Eurotherm Drives cannot accept responsibility for damage, injury, or expenses
resulting therefrom.
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Eurotherm Drives warrants the goods against defects in design, materials and workmanship
for the period of 12 months from the date of delivery on the terms
detailed in Eurotherm Drives Standard Conditions of Sale IA058393C.
Eurotherm Drives reserves the right to change the content and product specification without notice.

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This manual is to be made available to all persons who are required to install, configure or
service equipment described herein, or any other associated operation.
The information given is intended to highlight safety issues, and to enable the user to obtain
maximum benefit from the equipment.
Complete the following table for future reference detailing how the unit is to be installed and
used.
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Serial Number
(see product label)
Where installed
(for your own
information)
Unit used as a:
(refer to Certification
for the Inverter)
RComponent RRelevant Apparatus
Unit fitted: RWall-mounted ;Enclosure
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The equipment described regulates the flow of energy in electrical power installations, and is
intended for supplying only Eurotherm (or Eurotherm approved) servo motors.
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Installation, operation and maintenance of the equipment should be carried out by qualified
personnel. A qualified person is someone who is technically competent and familiar with all
safety information and established safety practices; with the installation process, operation and
maintenance of this equipment; and with all the hazards involved.
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• The equipment must be permanently earthed due to the high earth leakage current.
• The servo motor must be connected to an appropriate safety earth.
• The equipment contains high value capacitors which take time to discharge after removal of
the mains supply.
• Before working on the equipment, ensure isolation of the mains supply from terminals L1
and L2/N.
• Never perform high voltage resistance checks on the wiring without first disconnecting the
unit from the circuit being tested.
• When replacing a unit in an application and before returning to use, it is essential that all
user defined parameters for the product’s operation are correctly installed.
• This equipment contains electrostatic discharge (ESD) sensitive parts. Observe static
control precautions when handling, installing and servicing this product.
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The specifications, processes and circuitry described herein are for guidance only and may need
to be adapted to the user’s specific application.
Eurotherm Drives does not guarantee the suitability of the equipment described in this Manual
for individual applications.
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Under fault conditions, power loss or other operating conditions not intended, the equipment
may not operate as specified. In particular:
• The motor speed may not be controlled
• The direction of rotation of the motor may not be controlled
• The motor may be energised
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The user must provide guarding and /or additional safety systems to prevent risk of injury and
electric shock.
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• All control and signal terminals are SELV, i.e. protected by double insulation. Ensure all
wiring is rated for the highest system voltage.
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• All exposed metalwork in the Inverter is protected by basic insulation and bonding to a
safety earth.
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These are not recommended for use with this product but ,where their use is mandatory, only
Type B RCDs should be used.
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The 631 Digital Servo Drive is designed to control Eurotherm approved AC Brushless Servo
Motors. It is available in a range of current ratings from 1 to 6 Amps.
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The EASYRIDER software ?is used to set-up the drive. An “Autopilot” set-up wizard can be
started when using the software.
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The “BIAS” progamming language is contained in EASYRIDER ?which provides for up to
1500 lines of program code.
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The unit is operated remotely using the analog/digital inputs and outputs via a PLC, for example.
Multiple units can be controlled using RS232, CAN-Bus or Incremental Bus.
Four operating modes offer various speed, torque and position controls.
There is a seven-segment diagnostic display for trip and fault finding information.
The internal RFI filter offers enhanced EMC compliance without the need for additional external
components.
An internal dynamic brake resistor is provided.
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• Check for signs of transit damage
• Check the product code on the rating label conforms to your requirement.
If the unit is not being installed immediately, store the unit in a well-ventilated place away from
high temperatures, humidity, dust, or metal particles.
Refer to Chapter 2: “An Overview of the Servo Drive” to check the rating label/product code.
Refer to Chapter 8: “Routine Maintenance and Repair” for information on returning damaged
goods.
Refer to Chapter 9: “Accessories” to check for the correct items.
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This manual is intended for use by the installer, user and programmer of the 631 Servo Drive. It
assumes a reasonable level of understanding in these three disciplines.
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Enter the “Model No” from the rating label into the table at the front of this manual. It is
important that you pass this manual on to any new user of this unit.
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Use the manual to help you plan the following:
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Know your requirements:
• certification requirements, CE/UL/CUL conformance
• conformance with local installation requirements
• supply and cabling requirements

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Know your operator:
• how is it to be operated, RS232, CAN-Bus?
• what level of user is going to operate the unit?
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Know your application:
• select the appropriate Operating Mode
• plan your “programming”
• enter a password to guard against illicit or accidental changes
• learn how to back-up your application data
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The manual is divided into chapters and paragraphs. Page numbering restarts with every chapter,
i.e. 5-3 is Chapter 5, page 3.
Further descriptions,
that relate to this document.
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POWER
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1
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4
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0
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Resolver Connection
(mandatory)
Motor 1
Motor 2 (synchronised to Motor 1)
POWER
Encoder/Stepper connection
to next 631 controller
CAN-Bus connection
to next 631 controller
(last controller is terminated)
CAN-Bus terminator
EASYRIDER software
used to configure
each 631 individually
The Servo Drive is controlled via RS232, CAN-Bus or Incremental Bus using a PLC. It is
configured using the EASYRIDER software.
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Table 2-1 Control Features

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Instructions _ Programming
'
Diagnostics " Setup
EASYRIDER ?
:_
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PLC
Custom-made Software
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PLC I/O ±10V )'
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631 Servo Drive
current-loop
speed-loop
position-loop
•
PLC
RS232
X15
CAN-Bus
X20/X21
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Figure 2-2 Communications Options
(analog setpoint value)
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Pos.1 Pos.2
M
Synchronisation
(electronic gearbox)
1 : X
CAN-Bus Network
631
Unit X
631
Unit Y CAN
Pulse Control
631
AC Servo
Stepper motor
CAM Profiling
Pos X
Pos Y
631
+10V -10V
R
M
Point-to-Point
Position Control
control or
Conventional Control
incremental
encoder
Figure 2-3 Typical Applications

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The unit is fully identified using a five block alphanumeric code which records how the Servo
Drive was calibrated, and its various settings when despatched from the factory.
The Product Code appears as the “Model No.”. Each block of the Product Code is identified as
below:
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631/002/230/F/00
Servo Drive Type 631 / rated output current 2A / AC supply 230V / with internal filter /
Eurotherm standard mechanical package.

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easily re-positioned to allow
different mounting configurations
Fixing hole
centres DIN mounting
dimensions
SIDE VIEW PANEL MOUNTING VIEW DIN MOUNTING VIEW
Adjustable mounting clip can be
Figure 3-1 Mechanical Dimensions for 631
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The unit must be installed in a vertical position to guarantee the best air circulation for the
cooling ribs of the heat sink. Vertical installation above other drive racks or above other heat
producing devices can lead to overheating.
You must install the unit inside a suitable cubicle. The inside of this cubicle must be free from
dust, corrosive fumes, gases, and all liquids including condensation.
If the unit is being installed in a place where condensation is likely, install a suitable
anticondensation heater. The heater must be SWITCHED OFF during normal operation.
Automatic switch off is recommended.

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The digital servo drive is protected against damage caused by overheating.
There is a thermal sensor installed on the heat sink. When the temperature rises to >95°C, the
drive is automatically switched off. This setting cannot be changed. Use a cabinet of the correct
size for adequate air circulation, see below.
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The servo drive gives off heat in normal operation and must therefore be mounted to allow the
free flow of air through the ventilation slots and heatsink. Maintain minimum clearances for
ventilation as shown below to ensure heat generated by other adjacent equipment is not
transmitted to the Servo Drive. Be aware that other equipment may have its own clearance
requirements. When mounting two or more 631s together, these clearances are additive.
Ensure that the mounting surface is normally cool.
100mm / 4"
100mm / 4"
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It is better to place heat-producing devices low down inside an enclosure to support internal
convection, which will spread the heat. If placing devices up high is unavoidable, you should
consider increasing the (upper) dimensions of the cubicle, or installing fans.

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Figure 3-2 Cabling Requirements
Cables are considered to be electrically sensitive, clean or noisy. You should already have
planned your cable routes with respect to segregating these cables for EMC compliance.
If not, refer to Chapter 12: “Certification for the Servo Drive”.

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Remove Terminal Cover by pressing here and pulling down
631
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Remove the terminal cover as shown above.
Insert a flat-bladed screwdriver (size 3.5 mm max.) inside the smallest
hole. Lever the screwdriver, keeping it firmly pressed into the hole. The
cage will open.
Insert the stripped wire (5mm to 6mm/0.22in.) or wire crimp inside the
cage keeping the screwdriver in position.
Remove the screwdriver. Note the cage provides the correct force for a
secure connection.
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The temperature sensor in the motor windings of the approved Eurotherm servo motors are
classed as SELV, (i.e. protected by double insulation). Refer to Chapter 12: “Certification for the
Servo Drive” - Solid State Motor Overload Protection.
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resolver cable (without thermistor connections)
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We do not recommend the use of circuit breakers (e.g. RCD, ELCB, GFCI), but where their use
is mandatory, they should:
• Operate correctly with dc and ac protective earth currents (i.e. type B RCDs as in
Amendment 2 of IEC755).
• Have adjustable trip amplitude and time characteristics to prevent nuisance tripping on
switch-on.

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When the ac supply is switched on, a pulse of current flows to earth to charge the
internal/external ac supply EMC filter’s internal capacitors which are connected between phase
and earth. This has been minimised in Eurotherm Drives’ filters, but may still trip out any circuit
breaker in the earth system. In addition, high frequency and dc components of earth leakage
currents will flow under normal operating conditions. Under certain fault conditions larger dc
protective earth currents may flow. The protective function of some circuit breakers cannot be
guaranteed under such operating conditions.
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The wiring terminals accept a maximum conductor size of 12 AWG (3.2mm²).
The servo drive, when fitted with an internal ac supply EMC filter, is only suitable for earth
referenced supplies (TN).
Refer to Chapter 12: “Certification for the Servo Drive” for information on earthing
requirements.
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Refer to Chapter 14: “Application Notes” - Dynamic Braking for selection details and Chapter
11: “Technical Specifications” - Power Details.
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Figure 3-3 External Brake Resistor Terminals
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