171CCS76000 SQUARE D, 171CCS76000 Datasheet - Page 3

• Manufacturer Part Number: 171CCS76000
• Description: Programmable Logic Controller
• Manufacturer: SQUARE D

Specifications of 171CCS76000

• Peak Reflow Compatible (260 C): No
• Leaded Process Compatible: No
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

3/00
Self-terminating
F-adapter
For Selection and Pricing refer to Programmable Controller document no. 8000PL9602R11/99.
Primary PLC
Coaxial Cable
The hot standby option provides Quantum series CPUs with the high availability that
security-critical applications demand. Central to the system is a standby controller–a
second Quantum system configured identically with the primary control system with
special hot standby modules mounted in both backplanes. The standby controller uses a
high-speed fiber optic link to constantly maintain the current system status of the primary
controller. In the event of an unexpected failure in the primary controller, system control
automatically switches over to the standby controller. Critical processes running on a
remote I/O network remain intact, unaffected by controller hardware failures. The result is
higher productivity with reduced down-time.
At the beginning of every primary controller scan, the current register and I/O state table
is transferred to the standby controller across a secure, high-speed fiber optic link. If
switchover is triggered, the standby controller takes control of the system with up-to-date
I/O and register status for a bumpless, controlled transfer with minimal process impact. At
switchover, the standby controller becomes the primary controller and, when the downed
controller is restored to good health, it becomes the standby.
Most applications demand that identical logic programs reside in the two controllers. User
logic comparisons between the two controllers are performed at startup and during
runtime. By default, the standby controller is taken offline if a logic mismatch is detected.
You have the option to allow logic mismatches to coexist for high availability during
maintenance periods. If minor process changes are required, you can make them without
disturbing standby operations.
In the event that the standby controller does not have the application program, it can be
copied from the primary controller. Copying the program is a simple two-step procedure
that uses the keyswitch and update button on the front of the standby controller. This task
can be accomplished by a maintenance person without the use of a programming panel.
Hot Standby module
Hot Standby kit
Description
Fiber Optic Cable
Splitter
2 CHS hot standby processors
1 fiber optic (3m) hot standby cable
1 CHS loadable software package
1 S908 terminator kit
CHS installation manual
Tap
RIO Drop 1
Standby PLC
Components
Self-terminating
Quantum Automation Platform
. . .
F-adapter
Hot Standby Configuration
Tap
RIO Drop 2
Catalog Number
140 CHS 110 00
140 CHS 210 00
Hot Standby Module
All Rights Reserved
© 2000 Square D
1.06
. . .
kg
Terminated Tap
Weight
Last RIO Drop
2.33
. . .
lb
25-3