1757-SRM 1757SRM AB AB Sytem Redundancy Module
⇒ Click here for good price 1757-SRM
| Brand/Manufacturer | AB/USA |
| Part Number | 1757-SRM |
| Alternate Part Number | 1757-SRM |
| Description | MOTOR SERVO |
| Dimennsions | 14x13.5x7cm |
| Weight | 0.45kg |
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Product Details
The AB 1757-SRM ProcessLogix and ControlLogix System Redundancy
Module is a solid-state device that is employed in critical
industrial applications that should not be stopped under any
circumstances in order to provide a redundancy system by using an
identical pair of PLCs to guarantee operation at all times. The
1757-SRM redundancy module is designed for installation in any free
slot of a ControlLogix chassis but predefining the order of the
cards to install in each ControlLogix slot is recommended. Both PLC
systems, called the primary and secondary PLC systems, should be
identical for the redundancy system to work appropriately. If the
primary and secondary PLC systems are not exactly identical, or if
the modules do not have matching firmware revisions, the 1757-SRM
module will not be able to establish a redundancy system as
required.
The AB 1757-SRM ProcessLogix and ControlLogix System Redundancy
Modules installed in primary and secondary PLC chassis will need to
be interconnected by using a 1757-SRCxx Fiber-optic Cable. The
length of the cable can be 1 meter (3 feet), 3 meters (9 feet), 10
meters (30 feet), 50 meters (150 feet), or 100 meters (300 feet).
Once both chassis are assembled and connected, it can be designated
which one will be the primary chassis and which will be the
secondary chassis. When power is applied to both chassis, the AB
1757-SRM ProcessLogix and ControlLogix System Redundancy Module
will start the qualification process, that is, it will compare each
PLC’s hardware and firmware characteristics and determine their
full compatibility. If they are the same, then redundant control
will be guaranteed and in case of a failure in the first PLC, the
second one will take over the application process and signal an
alarm to inform the final users of the event without stopping the
critical process in the meantime.
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