SIEMENS | 6ES5535-3LB12 | Communications Processor - CP535

Product Description:

The SINEC L1 bus can be seen as a predecessor to SINEC L2 and supports the low-end communication performance range. SINEC L1 consists of the following components:
CP530 communications processor
BT 777 bus terminal (for each node)
Bus cable (4-wire, shielded)

The CP530 communications processor (6ES5530-3LA12) performs the core coordination function ("master") for the SINEC L1 bus that operates according to the "master-slave method". It controls the flow of information. In the higher-level controller - the so-called master PLC -, the CP530 is connected within the bus system. The lower-level programmable controllers - called slave PLCs or simply slaves – can connect to SINEC L1 in two ways:
The programmable controllers S5-100U, S5-101U and S5-115U connect via the programming device interface that already exists on the controller. Note: The CPU 100 of the 100U programmable controller is not slave-capable.
 If, for certain reasons, the programming device interface should remain on a lower-level S5-115U controller, it is optionally possible, also in this case, to connect a CP530, which then performs the slave interface function. On the SINEC L1 bus, the programmable controllers S5-135U and S5-150U always communicate only via a CP530 communications processor. 

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