The following table shows all pages that have been revised since the f irst issue of
this manual.
RevisionAffected Pages
Date
9/15/93Initial
The following publications provide additional information on the VCD 723
drives. Each is a vailable from MagneTek. Please use the form provided at the
back of this manual to place your order.
● Maintenance GuideTM 6723-10
● PCDU GuideTM 6723-20
● MicroTrac® LAN Network GuideTM 6723-30
Additional copies of this manual can also be ordered by specifying the VCD 723
Product Guide (TM 6723).
9/15/93
Revision History
i
Warranty
ii
9/15/93
Warranty
Warranty
Standard products manufactured by MagneTek are warranted to be free from
defects in workmanship and material for a period of one year from date of
shipment and any products which are defectiv e in w orkmanship or material will
be repaired or replaced, at MagneTek's option, at no charge to the Buyer. Final
determination as to whether a product is actually defective rests with MagneTek.
The obligation of MagneTek hereunder shall be limited solely to repair or
replace, at MagneTek's discretion, products that fall within the foregoing
limitations, and shall be conditioned upon receipt by MagneTek or written notice
of any alleged defects or deficiency promptly after discovery and within the
warranty period, and in the case of components or units purchased by
MagneTek, the obligations of MagneTek shall not exceed the settlement that
MagneTek is able to obtain from the supplier thereof. No products shall be
returned to MagneTek without its prior consent. Products which MagneTek
consents to have returned shall be shipped prepaid f.o.b. MagneTek's factory.
MagneTek cannot assume responsibility or accept inv oices for unauthorized
repairs to its components, even though defective. The life of the products of
MagneTek depends, to a large extent, upon the usage thereof, and MAGNETEK
MAKES NO WARRANTY AS TO FITNESS OF ITS PRODUCTS FOR THE
SPECIFIC APPLICATIONS BY THE BUYER NOR AS TO PERIOD OF
SERVICE UNLESS MAGNETEK SPECIFICALLY AGREES OTHERWISE
IN WRITING AFTER THE PROPOSED USAGE HAS BEEN MADE
KNOWN TO IT.
Limitation
Of Liability
THE FOREGOING WARRANTY IS EXCLUSIVE AND IN LIEU OF ALL
OTHER WARRANTIES, EXPRESSED OR IMPLIED, INCLUDING, BUT
NOT LIMITED T O, ANY WARRANTY OF MERCHANTABILITY OR OF
FITNESS FOR A PARTICULAR PURPOSE AND BUYER HEREBY
WAIVES ANY AND ALL CLAIMS THEREFORE.
IN NO EVENT SHALL MAGNETEK BE LIABLE FOR LOSS OF PROFIT,
INDIRECT, CONSEQUENTIAL OR INCIDENTAL DAMAGES WHETHER
ARISING OUT OF WARRANTY, BREACH OF CONTRACT OR TORT.
16Connections on PG (Digital Tachometer) Card ............................. 79
9/15/93
List of Illustrations
v
Introduction
1
How To Use
This Manual
Controls and
Indicators
Status LEDs
MagneTek has made this product guide an easy to use reference. To help you use
this manual, we have provided the following guides:
● The top of each page has an identification of the section. For example, notice
that at the top of this pageappears. This identifies
the page as part of Section 1, Introduction. There are four sections in this
manual: Introduction, Installation and Start-Up, Operation and
Troubleshooting/ Maintenance.
● Each section is organized into one or more major subject headings. These are
the main topics covered in that section. You will recognize major subject
headings by their distinctive appearances. The next line illustrates an example:
This is an example of a major subject heading from Section 3.
Each major subject heading may have one or more minor topics that are
covered. The next line illustrates an e xample:
This is a minor topic covered under “Controls and Indicators.”
Each minor topic may have one or more descripti v e headings. These identify
items covered within the minor topic. The next line illustrates an e xample:
Introduction
1
Ready
This is a descriptive heading covered under “Status LEDs.”
At the bottom of each page is the name of the first major subject heading
covered on that page. The page number and re vision date are also included.
For example, at the bottom of this page, the information indicates that “How
to Use This Manual” is the first major subject heading. It was last revised
September 15, 1993.
Using the information on the top of the page to find the section, the bottom of
the page to find the major subject heading and the left margin to f ind the
minor topics and descriptive headings, you can easily page through the
manual to find the information you need.
A table of contents is also included. The Table of Contents can be used to
locate section and major topics. A glossary is provided to define terms which
may be unfamiliar .
9/15/93
How To Use This Manual
1
1
Introduction
Safety
Statements
How To Contact
MagneTek
In addition to notes, the following types of precautionary statements appear in
this manual.
IMPORTANT
A statement of conditions which should be observed during driv e
setup or operation to ensure dependable service.
CAUTION
A statement of conditions which must be observed to prev ent
undesired equipment faults or degraded drive system
performance.
W ARNING
A statement of conditions which MUST BE OBSER VED to
prevent personal injury or serious equipment damage.
For additional information, contact any MagneTek Representative, Authorized
Distributor , or our Technical Support Staff at:
MagneTek
16555 West Ryerson Road
New Berlin, WI 53151
(800) 541-0939(414) 782-0200
FAX: (414) 782-1283
2
Safety Statements
9/15/93
Introduction
1
Drive
Description
P erformance
Flexibility
The MicroTrac name is used to describe MagneTek's family of digital system
drives and the compatible products used to create systems. This manual
describes the MicroTrac compatible VCD 723 AC motor drive.
The VCD 723 is a high performance, sine-coded, Pulse Width Modulated
(PWM) AC motor drive which genera tes an adjustable three phase output for
complete speed or torque control of a compatible AC induction motor. The
VCD 723 can maintain a 150% current overload for 60 seconds with automatic
stall prevention and v oltage boost to prevent nuisance tripping during load or line
side transient conditions. The VCD 723 will not induce any voltage line
notching distortion to the utility line and maintains a displacement power factor
of approximately 0.98 throughout its speed range.
The VCD 723 drive is totally software configurable to the application through a
high level graphical language, called Programmable Application Control (PAC).
PA C provides complete flexibility without having to make hardware
adjustments. Interface to other equipment is provided with local Input/Output
(I/O) or a high speed Local Area Network (LAN). Use of the LAN means that a
single coaxial cable eliminates multiple conductor cables and provides high
noise immunity. Extensive diagnostic and setup capability are provided thr ough
two control/display units. The Local Control/Display Unit (LCDU) is mounted
flush with the drive co v er and consists of a Liquid Crystal Displa y (LCD) with
two lines of sixteen alphanumeric characters, fi v e pushbuttons, and fiv e status
Light Emitting Diodes (LED’ s). The LCDU can be used for all setup functions
and many diagnostics. The Portable Control/Display Unit (PCDU) is an optional
hand-held device that can be plugged into any MicroTrac compatible drive and
used for all the same functions as the LCDU plus some advanced diagnostics.
The PCDU has two lines of sixteen alphanumeric characters and a thirty-key
keypad.
9/15/93
Accuracy
The distributed control architecture of the MicroT rac system means that each
drive performs its o wn regulation calculations synchronized to a common high
accuracy crystal master. Thus, even minute crystal drift will not affect multiple
drive tracking. This allo ws a MicroTrac system to maintain the drift between
sections to 0.00% at steady state. The fully digital nature of the regulation
means that an individual drive can maintain a 0.00% average dif ference between
set and actual speed from no-load to full-load when using digital tachometer
speed feedback. Digital setup and performance assure exact process line and
finished product duplication shift to shift and month to month. Speeds, tensions,
ratios, draws, limits, ranges, alarms, and other control parameters can be set as
percentages or exact numerical values via keypad or thumbwheel switches with
up to six digits of resolution. Parameters are entered and displayed in plain and
understandable English. The drive can be completely set up prior to actual
running and changes can be made during operation. Keypad entry of changed
parameters, protected memory, and factory default values allow the operator to
modify data with minimum risk to the process.
Drive Description
3
1
Introduction
Useability
Versatility
The VCD 723 drive is composed of several major components. The base
component is the MagneTek VCD 703 drive, with special software. To this is
added the MicroTrac circuit card, which provides gr aphical PAC programming
environment, LAN communications and e xtra local I/O. The other components
are the Local and Portable Control/Display Units, which allow user friendly
interface for drive setup and provides extensive diagnostic capabilities. In
addition, optional circuit cards can be added for expanded local I/O capabilities
and added functionality.
The VCD 723 can be set up to operate in one of two major modes based on the
level of regulation ena bled. The first mode allows the driv e to run as if it were a
VCD 703 drive, b ut the input for the constants come from the PAC environment
instead of from the Digital Operator . In addition to utilizing the speed control
logic of the VCD 703 drive to control the motor, this mode adds the extra I/O
capabilities that are present on the MicroTrac circuit card. This also allo ws f or
all of the advantages and flexibility of utilizing the PAC programming language.
In this mode, the inputs and outputs on the VCD 723 behave in the same way
that they would hav e had this been a VCD 703 drive, however , the An, Bn, Cn,
Dn, On, Sn, and Un constants are entered via the PA C environment.
The second major operating mode of the VCD 723 has the VCD 703 drive
operate as a slave to the MicroTrac circuit card. In this mode, the PAC
programmer has complete freedom in how the motor should be controlled,
including which inputs/outputs should perform a specific function.
Characteristics
The VCD 723 is mounted in a NEMA 1 wall mount enclosure, with other
power/control components required for VCD/VCM interconnection.
When properly installed, operated and maintained, the VCD 723 can provide
years of troublefree service. It is important that the person who operates,
inspects, or maintains this equipment thoroughly read and understand this
manual before proceeding.
Humidity90% RH (no condensation)
Vibration1 G at less than 20 Hz, up to 0.2 G at 20 to 50 Hz.
SECTION D. All VCM’s
(Accel / Decel times set independently)
zero speed control, servo lock, arbitrary torque detection, etc.
cooling fan failure, grounding, etc.
operation during momentary power loss (immediate stop at end
of programmed ride-thru time, 2 sec. max.)
–20 to +60°C (–4 to +140°F)
SECTIOND
(See Note 3)
NOTES:
(1)Low noise operation can be selected by setting of Sn-09 : 0XXX = General Use (low carrier frequency – 2.08 kHz);
1XXX = Low Noise Operation (high carrier frequency - 12.5 kHz). Rated current is 80% of General Use rated current.
(2)100% reference current is Continuous Rated Current for Low Noise Operation or General Use.
(3)For a drive rated 230V 5HP or less, or 460V 3HP or less, standard max. ride-thru time is 1 sec (1000 msec). The
max. ride-thru time can be extended to 2 sec (2000 msec) by adding an optional external mounting capacitor unit.
(4)Temperature during shipping. Storing in this temperature for a long period may deteriorate main circuit capacitor.
8
Ratings and Specifications
9/15/93
Introduction
1
Terminal
Functions and
Control Signal
Specifications
There are various types of I/O available in the VCD 723. The terminal I/O
specifications are listed in Table 2. The digital feedback tachometer connector
specifications are listed in Table 3. A diagram of these connections can be found
in Figure 4.
Table 2. Terminal I/O Specifications
TERMINALFUNCTIONDESCRIPTION
1,2,4,5,6,7,8
3
9,10
11
12
13
14
15
16
17
18,19,20
21,22
23,24
25,26
27
Logic inputs
Logic inputs
Logic output,
normally open
relay contact
Logic input
common
Shield tie point
Analog input
Analog input
Analog input
power supply
Analog input
Analog input
common
Logic output,
form C relay
contact
Analog output
Current monitor
analog output
Logic outputs,
open collector
Open collector
output common
The input is off (logic 0) when the input is open, and on
(logic 1) when the input is connected to Logic Input
Common (0V). If input is from a relay contact, the
contact rating must be: 30 VDC min
100 mA min
If input is from an open collector, the rating must be:
35 VDC min
100 mA min
This is always used for external fault generation. This
input cannot be reassigned. The SN12 constant can be
used to set this input to Normally Open or Normally
Closed. If Normally Open is selected, a fault is indicated
when the contact closes and if Normally Closed is
selected an open contact indicates the fault.
Normally open relay contact.
Contact capacity: 250 VAC at 1A or below.
30 VDC at 1A or below.
Common (0V) for use in wiring Logic Inputs.
Shield sheath tie point which is connected to Chassis
Common.
Non-isolated 0 to 10 VDC analog input. Input has 20K
ohms of impedance. Resolution is 10 bits.
Non-isolated 4 to 20 mA analog input. Input has 250
ohms of impedance. Resolution is 10 bits.
Control power supply for analog input: +15 VDC at 20
mA max.
Non-isolated 0 to 10 VDC analog input. Input has 20K
ohms of impedance. Resolution is 10 bits.
Common (0V) for use in wiring analog inputs.
18 is Normally Open, 19 is Normally Closed, and 20 is
Common. Contact Capacity: 250 VAC at 1A or below.
30 VDC at 1A or below.
Non-isolated 0 to 11 VDC analog output. Maximum
sourcing current is 2 mA. 21 is positive with respect to
22. Resolution is 8 bits.
Non-isolated analog output. Approximately 5 VDC at
rated output current.
Photocoupler isolated output. Capacity of +48 VDC
max at 50 mA max.
Common (0V) for use in wiring multi-function open
collector outputs.
9/15/93
Ratings and Specifications
9
1
Introduction
Table 2. Terminal I/O Specifications - Continued
TERMINALFUNCTIONDESCRIPTION
28,29
30
31
32
51
52
53
54
55,56
57
58
59,60,61,62
63
64
65,66,67,68
69
70
71,72,73,74
Connector
CA1
Logic outputs,
open collector
Motor
thermistor input
Motor
thermistor input
common
Shield tie point
+10VREF
output
-10VREF
output
I/O common
Shield tie point
Analog outputs
I/O common
Shield tie point
Analog input
I/O common
Shield tie point
Analog input
I/O common
Shield tie point
Digital
Tachometer
inputs
Digital
Tachometer
Connector
Photocoupler isolated output. Capacity of +48 VDC
max at 50 mA max.
Motor temperature feedback.
Common (0V) for use in wiring motor thermistor input.
Shield sheath tie point which is connected to Chassis
Common.
Reference voltage output for use with MicroTrac card
analog inputs. 10 mA max capacity.
Reference voltage output for use with MicroTrac card
analog inputs. 10 mA max capacity.
Common (0V) for use with MicroTrac card I/O.
Shield sheath tie point which is connected to Chassis
Common.
Non-isolated -10 to +10 VDC analog outputs.
Maximum sourcing current is 2 mA. Resolution is
12 bits.
Common (0V) for use with MicroTrac card I/O.
Shield sheath tie point which is connected to Chassis
Common.
Non-isolated differential analog input. Input has over
100K ohms of impedance. Resolution is 12 bits. Input
voltage range is -600 to +600 mV when terminals 60 (+)
and 61 (-) are used. Input voltage range is -10 to +10
VDC when terminals 59 (+) and 62 (-) are used.
Common (0V) for use with MicroTrac card I/O.
Shield sheath tie point which is connected to Chassis
Common.
Non-isolated differential analog input. Input has over
100K ohms of impedance. Resolution is 12 bits. Input
voltage range is -600 to +600 mV when terminals 66 (+)
and 67 (-) are used. Input voltage range is -10 to +10
VDC when terminals 65 (+) and 68 (-) are used.
Common (0V) for use with MicroTrac card I/O.
Shield sheath tie point which is connected to Chassis
Common.
The quadrature encoder A (terminal 71), /A (terminal
72), B (terminal 73), and /B (terminal 74) signals are
connected here. There is 100 ohms of impedance
between each pair of encoder input signals. Input
differential voltage of 5 VDC max. The maximum
input frequency is 300KHz.
Isolated +12 VDC power supply to quadrature encoder
and quadrature encoder signal inputs.
10
Ratings and Specifications
9/15/93
Introduction
Table 3. Digital Feedback Tachometer Connector
CA1 Terminal Specifications
TERMINALFUNCTIONDESCRIPTION
1
Option Cards
1
2
3,4,5,6
7
Isolated power
supply
Isolated power
supply
common
Digital
Tachometer
inputs
Shield tie point
Isolated power supply for digital tachometer: +12 VDC
at 200 mA max.
Common (0V) for digital tachometer isolated power
supply.
The quadrature encoder A (terminal 3), /A (terminal 4),
B (terminal 5), and /B (terminal 6) signals are connected
here. There is 560 ohms of impedance between each
signal pair, pair A and /A and pair B and /B. Input
differential voltage of 5 VDC max. The maximum input
frequency is 300KHz.
Shield sheath tie point which is connected to Chassis
Common.
There are various option cards a vailable to provide additional capability. The
option cards are each described in detail in a separate User Reference Sheet. A
summary of available option cards is contained in Table 4.
Table 4. Summary of Option Cards
9/15/93
OPTION CARDFUNCTION
Analog Monitor, AO-8Has two analog output channels with 8 bit resolution. Each output
voltage is from 0 to +10 VDC and is non-isolated.
Analog Monitor, AO-12 Has two analog output channels with 12 bit resolution. Each output
voltage is from 0 to +10 VDC and is non-isolated.
Digital Output, DO-8Has six photocoupler output channels with a single common. Also
has two independent relay contact output channels.
Torque Control, TRQ-A Closes the torque control loop for higher accuracy torque control.
Ratings and Specifications
11
1
Introduction
System
Considerations
When operating in a system application, the VCD 723 can be used with other
MagneTek devices with which it will communicate by means of the MicroT rac
Local Area Network (LAN). Refer to Figure 1 for a typical MicroTrac System.
Each of the following remote devices (board or assembly) is descr ibed in detail
in a separate User Reference Sheet.
●Remote Display Controller LAN Node PCB (RDC) – This board provides
a means for the MicroTrac system to have system operating parameters
displayed at locations remote from the MicroTrac drive. The RDC
communicates with the drive through the LAN. A single RDC can support
up to 31 Remote Display Units (RDUs). By means of a Portable
Display/Control Unit (PCDU), the RDC allows the selected display for each
RDU to be changed at anytime.
●Remote Display Unit (RDU) – Designed for mounting in a panel cutout, the
RDU provides a two-line LED display (16 character alphanumeric, and 5-1/2
digit numeric). Consisting of a terminal, the information on its display is
transmitted by a Remote Display Controller LAN Node PCB.
●Remote Keyboard Assembly – Designed for mounting on a panel with or
near a Remote Display Unit, the Remote Keyboard allows initiation of RDU
display changes without the need for a Portable Display/Control Unit.
●Remote I/O [Input/Output] Controller LAN Node PCB (RIO) – This
board provides a means for the MicroTrac system to have inputs or outputs at
locations remote from the drive. The RIO communicates with the drive
through the LAN. A single RIO can support up to 6 Remote I/O boards,
using any combination of the following:
remote thumbwheel switch input/output capability for the MicroTrac
system. It can support up to 9 Thumbwheel Switch Assemblies. This
board is connected to a Remote I/O Controller LAN Node PCB for
communication with the drive.
12
System Considerations
9/15/93
Introduction
●Remote Programmable Logic Controller (PLC) Interface – Available for
a variety of PLCs. These devices allow bi-directional communication via the
MicroTrac LAN between dri ves and the PLC. Both logic and numeric data
can be transferred.
●Remote Power Supply – The Remote Power Supply produces control level
voltages for use by a Remote LAN Node PCB or a Remote Display Unit.
●Remote Serial Communication Controller LAN Node PCB (RSC) – This
board provides a means for the MicroTrac system to have input from or
output to other equipment that uses RS-232 serial communication. The RSC
communicates with the drive through the LAN.
1
9/15/93
System Considerations
13
1
MicroTrac
Drive
DRIVE
CONTROL
UNIT
REMOTE
INPUT/OUTPUT
CONTROLLER
PCB (RI/O)
REMOTE
PLC INTER-
FACE
REMOTE
COMMUNICATIONS
CONTROLLER
PCB (RSC)
REMOTE
DISPLAY
CONTROLLER
PCB (RDC)
DISPLAY #1
REMOTE
DISPLAY
UNIT (RDU)
DISPLAY #2
PERSONAL
COMPUTER
PROGRAMMABLE
LOGIC
CONTROLLER (PLC)
RS-232 OR
RS-422
RS-485
DISPLAY #3
DISPLAY #4
UP TO 9 BANKS OF
6 DIGITS
PCDU
MESSAGE
SELECT
+1 8 8 8 8 8
8 8 8 8 8 8
+1 8 8 8 8 8
THUMB
WHEELS
8 ISOLATED LOGIC
I/O MODULES
7 NON-ISOLATED
LOGIC OUTPUTS
16 NON-ISOLATED
LOGIC INPUTS
4 ISOLATED ANALOG
I/O MODULES
7 NON-ISOLATED
ANALOG OUTPUTS
4 NON-ISOLATED
ANALOG OUTPUTS
4 NON-ISOLATED
ANALOG INPUTS
REMOTE
THUMBWHEEL
INPUT/OUTPUT
PCB
(TWI/O)
REMOTE
ANALOG
INPUT/OUTPUT
PCB
(ANI/O)
UP TO 6 REMOTE INPUT/OUTPUT PCBS
UP TO 31 REMOTE
DISPLAY UNITS
KEYBOARD
REMOTE
LOGIC
INPUT/OUTPUT
PCB
(LOGI/O)
KEYBOARD
ENABLE
2.5 million bits/second
93 Ohm
Terminator
93 Ohm
Terminator
LOCAL
I/O
RG 62/U Coaxial Cable
1 2 3 D C
4 5 6 D N
7
8 9
0
N E
•
LA-8
LOCAL
I/O
LOCAL
I/O
MicroTrac
Drive
DRIVE
CONTROL
UNIT
MicroTrac
Drive
DRIVE
CONTROL
UNIT
+
-
Introduction
14
System Considerations
Figure 1. Typical MicroTrac System Diagram
9/15/93
Installation and Start-up
2
Pre-installation
Considerations
Receipt of
Shipment
Unpacking
Repacking
Location of the VCD 723 is important to achieve proper performance and
normal operating life. The unit should be installed in an area where it will be
protected from the following:
●Direct sunlight, rain or extreme (condensing) moisture.
●Corrosive gases or liquids.
●Vibration, airborne dust or metallic particles.
All equipment is tested against defect at the factory. Any damages or shortages
evident when the equipment is receiv ed must be reported immediately to the
commercial carrier who transported the equipment. Assistance, if required, is
available from your MagneTek representative. Always refer to the order number ,
equipment description, and serial number when contacting MagneTek.
Remove the protective shipping material from around the equipment. Remove
all packing material. Inspect for loose wiring. Make sure all contact wedges and
other shipping devices hav e been remo ved.
For long periods of storage, equipment should be covered to prevent corrosion,
and should be placed in a clean, dry , location. If possible, equipment should be
stored in its original crating. Periodic inspection should be made to ensure that
the equipment is dry and that no condensation has accumulated. The equipment
warranty does not cover damage due to improper storage. Assistance, if
required, is available from your MagneTek representative.
Physical
Installation
For effecti ve cooling as well as proper maintenance, the VCD 723 must be
installed vertically. Use the holes provided on the back of the driv e for
installation. There MUST be a MINIMUM 6 inch clearance above and below
the VCD 723 enclosure. A MINIMUM 3 inch clearance is required on the left
side of the VCD 723 enclosure. See Figure 2 for physical dimensions.
.250 x .125
.312 x .156
.375 x .188
.500 x .250
.500 x .250
.625 x .312
.750 x .375
.875 x .438
18
Physical Installation
Figure 2. VCD 723 Dimensions (Sheet 3 of 3)
9/15/93
Installation and Start-up
2
Electrical
Connection
All basic connections are shown in Figure 3 and the drive’s external connection
locations are shown in Figure 4. Most of the control I/O are shown in a gener al
fashion for an example of proper wiring. Because of the flexibility of the VCD
723, many of the control functions (i.e., R UN, Speed Reference, etc.) are not
permanently assigned to a specific I/O point. The function that many of the I/O
points serve is dependent upon the designer. See schematic and interconnection
diagrams for specific connections.
It is very important that voltage isolation be maintained with all the I/O points
which are not already isolated. For example, the analog outputs are not isolated.
Therefore, if an analog output is driving a meter movement, then the movement
must be in reference to the VCD 723 I/O common and not to any other common
(i.e., earth common). On the other hand, if the analog output is connected to a
non-isolated analog input of some test equipment, then analog isolation is
necessary. The analog isolation must be performed with components not
supplied with the VCD 723.
9/15/93
Electrical Connection
19
2
Installation and Start-up
LCDU
Pulse Generator Connection
20
Electrical Connection
Ground Connection
MicroTrac/Inverter Connection
LA-15
Figure 3. VCD 723 Basic Interconnection Diagram
9/15/93
Installation and Start-up
Pulse Generator
(CA1)
PCDU
MicroTrac LAN
I/O Terminals 1-32
(See figure below
for numbering order)
I/O Terminals 50-74
LA-16
11 12 13 14 15 16 17
12345678
18 19 20
32 9 10
25 26 27 28 29 30
21 22 23 24 31
The connection of control circuit terminals 1 to 32 do not follow the terminal numbering
order. See the following figure for correct wiring (printed on the PC board).
2
9/15/93
Figure 4. VCD 723 External Connections Diagram
Electrical Connection
21
2
Installation and Start-up
Wire Sizes and
Connections
Ensure that wire size and disconnect devices conform to the installation
contractor’ s dra wings and to all applicable codes. Refer to Tables 5 and 6 for
proper wire sizes and interconnecting information.
CAUTION
●Use only factory supplied installation instructions to install
dynamic braking resistors. Failure to do so may cause
equipment damage or personnel injury.
●Use 600 volt vinyl-sheathed wire or equi valent. Wire size
should be determined considering ampacity and codes.
●Never connect A C main power to output terminals T1(U),
T2(V), and T3(W).
●NEVER allow wire leads to contact the VCD 723
enclosure. Short-circuit may result.
●NEVER connect power factor correction capacitors or
noise filter to VCD 723 output.
●Size of control wire must be suitable for Class I circuits.
●Use only closed loop (ring lug) connectors sized for the
selected wire gauge. The connectors are to be installed
using the correct crimp tool recommended by the connector
manufacturer .
Observe the following precautions when making wiring connections:
●Separate the leads used for control I/O (i.e., the signals on terminals 1
through 32, terminals 51 through 76, connector CA1, etc.) from those used
for the power signals (i.e., L1(R), L2(S), L3(T), T1(U), T2(V), T3(W)). Do
not run these two groups in the same conduit or wire trough.
●Provide shielded and twisted leads as indicated on the schematic and
interconnection diagrams. Connect shield sheath AT THE VCD 723 END
ONLY. The far end should be dressed neatly and left unconnected. Twisted
shielded pair wire should be used for long runs.
●Lead length should NOT EXCEED 164 feet (50 meters).
●The contact output control leads from terminals 9, 10, 18, 19, and 20 must be
separated from the other control leads.
●If the drive is being used in a LAN, use a BNC “T” connector to connect the
LAN coaxial cable to the drive.
22
Electrical Connection
9/15/93
Installation and Start-up
Table 5. Closed Loop Connectors and Wire SIzes for Terminal Screws