Rockwell/Allen-Bradley PCL3 Manual

Rockwell/Allen-Bradley PCL3 Manual
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Product Data
PLC3 Expansion System
AllenBradley
PLC3 Expansion System
Product Data
System Hardware
PLC-3 programmable controllers can be expanded to include as many as
four processor chassis. Expansion increases the number of available
module slots, allowing a PLC-3 system to be economically configured to
meet many application needs, while leaving open the option for future
expansion. The PLC-3 expansion system includes the following available
hardware:
PLC-3 Expansion Chassis (cat. no. 1775-A2)
PLC-3 Expansion Modules (cat. no. 1775-LX): one per processor
chassis
PLC-3 Expansion Terminators (cat. no. 1775-CXT): only required in a
three processor chassis system.
PLC-3 Expansion Distribution panel (cat. no. 1775-CXD): only required
in three and four processor chassis systems.
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Product Data
PLC3 Expansion System
PLC-3 Expansion Cable Set (cat. no. 1775-CX): one for a two processor
chassis system, three for a three processor chassis system, and four for a
four processor chassis system.
System Benefits
Expansion adds many benefits to a PLC-3 system:
Added module slots
Economically configurated
Four chassis expansion at anytime
Minimal limitations on module placement
Expansion modules are transparent to the system
No additional I/O wiring or programming
PLC3 Expansion Chassis
The PLC-3 expansion chassis consists of the following parts:
Chassis (cat. no. 1775-AC)
Expansion Chassis Door (cat. no. 1775-AD2)
Chassis Power Cable (cat. no. 1775-CAP)
Features of the expansion chassis include:
Heavy duty aluminum construction
Six module slots
Virtually slot independent module placement
Free flow convection cooling
Electro-mechanical interlock to guard against removal or insertion of
modules while power is applied to the chassis
The expansion chassis is identical to the PLC-3 main chassis, except that
the main chassis has a front panel that contains an alphanumeric display
and keypad.
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Product Data
PLC3 Expansion System
Chassis Identification
for Communication
In a multi-chassis PLC-3 programmable controller system, a chassis
identification number is necessary for communication. This is
accomplished by setting three switches on the backplane of each main and
expansion chassis. Table A shows the proper switch settings for each
chassis. Chassis are numbered sequentially starting with zero, with higher
priority chassis being assigned lower numbers. Therefore, the main
processor module (cat. no. 1775-L1, -L2) is always located in chassis 0,
the highest priority chassis.
Table A
Backplane Switch Settings
Multiple Chassis Systems
Chassis
Number
Comments
Switch Settings
0
Highest Priority - Must contain main processor module
1
2
OFF OFF
3
OFF
1
Second highest priority
ON
OFF
2
Available with expansion distribution panel only
OFF ON
OFF
3
Available with expansion distribution panel only
ON
OFF
OFF
ON
A two chassis PLC-3 system requires two expansion modules, one
installed in each chassis, connected by an expansion cable set. Connectors
on the ends of the expansion cable set (labeled A, B, C, and D) attach to
connectors on the expansion modules (also labeled A, B, C, and D). Match
the letter of the cable to the same letter of the connector. Figure 1 shows a
typical two chassis PLC-3 system.
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Product Data
PLC3 Expansion System
Figure 1
Two Chassis PLC3 System
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Product Data
PLC3 Expansion System
Three and four chassis PLC-3 systems require an expansion module
installed in each chassis, an expansion distribution panel, and one
expansion cable set per chassis. One end of each expansion cable set is
connected to an expansion module in the same manner as in a two chassis
system. The other end is connected to the expansion distribution panel.
Figure 2 shows a three chassis system, figure 3 shows a four chassis
system.
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Product Data
PLC3 Expansion System
Figure 2
Three Chassis PLC3 System
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Product Data
PLC3 Expansion System
Figure 3
Four Chassis PLC3 System
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Product Data
PLC3 Expansion System
Since the 1775-P1 power supply can deliver only enough current for two
full chassis, three and four chassis systems require two 1775-P1 power
supplies. Connect the “system common” studs on the two power supplies
together with either 1 inch metal braid wire or 8 AWG wire.
WARNING: In three chassis systems, chassis 0 and chassis 2
must use the same power supply. In four chassis systems,
chassis 0 and chassis 3 must use the same power supply. Failure
to connect the power supplies in this manner could result in
unpredictable operation, causing equipment damage and/or
injury to personnel.
Chassis Mounting Kit
Expansion chassis mounting dimensions are shown in figure 4, and
expansion distribution panel mounting dimensions are shown in figure 5.
For rack mounting of the chassis, order chassis 19-inch Rack Mounting Kit
(cat. no. 1775-XA). The rack mounting kit includes:
Mounting brackets
Hardware for mounting the brackets to the chassis
Hardware for mounting the brackets to the mounting rails
Figure 6 shows the location of the mounting brackets.
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Product Data
PLC3 Expansion System
Figure 4
Expansion Chassis Mounting Dimensions
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Product Data
PLC3 Expansion System
Figure 5
Expansion Distribution Panel Mounting Dimensions
Figure 6
Location of Mounting Brackets
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Product Data
PLC3 Expansion System
PLC3 Expansion Module
Figure 7 shows a front view of this expansion module.
The PLC-3 expansion module occupies one slot in a PLC-3 main chassis or
expansion chassis. Four 50-pin connectors, located on the front edge of the
expansion module, provide access to the expansion bus (EBUS). The
expansion bus is a set of cables which form the communication link
between different chassis in a PLC-3 system.
Figure 7
PLC3 Expansion Module
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Product Data
PLC3 Expansion System
On the front of this module there is a red LED indicator labeled EBUS
PARITY ERROR. This indicator, when illuminated, tells you that a parity
error has occurred during a transmission between any 1775-LX expansion
modules. The module will continue to operate when the LED is on.
Cycling power to the processor should clear the EBUS PARITY ERROR
indicator.
Module Placement
The PLC-3 expansion chassis provides six module slots with free flow
convection cooling. Figure 1 illustrates typical module placement for
optimum performance in a two chassis system. However, virtually any
module will operate in any slot.
PLC3 Expansion Distribution
Panel
The expansion distribution panel is used for three and four chassis PLC-3
systems. It can be mounted in a 19 inch rack. Sixteen 50-pin connectors on
the distribution panel connect to the expansion cable set, and in three
chassis systems, to the terminators. There are no terminators needed for a
two or four chassis system.
PLC3 Expansion Cable Set
A PLC-3 expansion cable set consists of four 10-foot cables. Each cable
has a 50-pin connector on each end which connects to either the expansion
module or the expansion distribution panel.
PLC3 Expansion System
Terminators
These terminators are used in three chassis PLC-3 systems and are
connected to Channel 3 of the 1775-CXD expansion distribution panel.
Related Publications
For additional information concerning the multi-chassis PLC-3 system,
refer to the PLC-3 Programmable Controller Assembly and Installation
Manual, publication 1775-800.
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Product Data
PLC3 Expansion System
Specifications
Expansion Chassis
Six Module Slots
Power Supply
(from 1775P1 power supply)
Backplane Current
(includes current to drive the expansion
distribution panel)
G +5,+15,15VDC, and control signals
G 5A from 5V DC circuit
G 80mA from 15V DC circuit
Dimensions (W x H x D)
G 19x 20x14.5 inches (48.3 x 50.8 x 37cm)
Weight
G 5.5 lbs (2.5 kg)
Weight (without modules)
G 40 lbs (18kg)
Expansion Distribution Panel
Dimensions (W x H x D)
G 19x15x1.5 inches (48.3 x 38.1x 3.81 cm)
Mounting
G Panel
G Rack
Weight
G 8.5 Ibs (3.8 kg)
Expansion Module
Single Slot
Power Supply
(from 1775P1 power supply via chassis
backplane)
G +5V and 15V DC
System Environmental Conditions
G Operational Temperature:
32° to 140°F (0° to 60°C)
G Storage Temperature:
40° to 185°F (40° to 85°C)
G Humidity:
5% to 95% (without condensation)
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Product Data
PLC3 Expansion System
With offices in major cities worldwide
WORLD
HEADQUARTERS
Allen-Bradley
1201 South Second Street
Milwaukee, WI 53204 USA
Tel: (1) 414 382-2000
Telex: 43 11 016
FAX: (1) 414 382-4444
EUROPE/MIDDLE
EAST/AFRICA
HEADQUARTERS
Allen-Bradley Europe B.V.
Amsterdamseweg 15
1422 AC Uithoorn
The Netherlands
Tel: (31) 2975/43500
Telex: (844) 18042
FAX: (31) 2975/60222
As a subsidiary of Rockwell International, one of the world’s largest technology
companies — Allen-Bradley meets today’s challenges of industrial automation with over
85 years of practical plant-floor experience. More than 11,000 employees throughout the
world design, manufacture and apply a wide range of control and automation products
and supporting services to help our customers continuously improve quality, productivity
and time to market. These products and services not only control individual machines but
integrate the manufacturing process, while providing access to vital plant floor data that
can be used to support decision-making throughout the enterprise.
ASIA/PACIFIC
HEADQUARTERS
Allen-Bradley (Hong Kong)
Limited
Room 1006, Block B, Sea
View Estate
28 Watson Road
Hong Kong
Tel: (852) 887-4788
Telex: (780) 64347
FAX: (852) 510-9436
CANADA
HEADQUARTERS
Allen-Bradley Canada
Limited
135 Dundas Street
Cambridge, Ontario N1R
5X1
Canada
Tel: (1) 519 623-1810
FAX: (1) 519 623-8930
LATIN AMERICA
HEADQUARTERS
Allen-Bradley
1201 South Second Street
Milwaukee, WI 53204 USA
Tel: (1) 414 382-2000
Telex: 43 11 016
FAX: (1) 414 382-2400
Publication 1775-2.10 — December, 1983
Supersedes Publication 1775-917 Dated December, 1983
Copyright 1983 Allen-Bradley Company, Inc. Printed in USA
14
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Artisan Technology Group is your source for quality
new and certified-used/pre-owned equipment
• FAST SHIPPING AND
DELIVERY
• TENS OF THOUSANDS OF
IN-STOCK ITEMS
• EQUIPMENT DEMOS
• HUNDREDS OF
MANUFACTURERS
SUPPORTED
• LEASING/MONTHLY
RENTALS
• ITAR CERTIFIED
SECURE ASSET SOLUTIONS
SERVICE CENTER REPAIRS
Experienced engineers and technicians on staff
at our full-service, in-house repair center
WE BUY USED EQUIPMENT
Sell your excess, underutilized, and idle used equipment
We also offer credit for buy-backs and trade-ins
www.artisantg.com/WeBuyEquipment
InstraView REMOTE INSPECTION
LOOKING FOR MORE INFORMATION?
Visit us on the web at www.artisantg.com for more
information on price quotations, drivers, technical
specifications, manuals, and documentation
SM
Remotely inspect equipment before purchasing with
our interactive website at www.instraview.com
Contact us: (888) 88-SOURCE | [email protected] | www.artisantg.com
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