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6 sinec l1 submodule – Siemens S5-135U/155U User Manual

Page 258

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5-118

System Manual

C79000-G8576-C199-06

5.11.6

SINEC L1 Submodule

The SINEC L1 submodule is for use with data transmission via the
SINEC L1 bus.

The SINEC L1 submodule can be inserted in the following CPU:

Interface Submodule ...

For Use With ...

SINEC L1 submodule

CPU 928B, from Version 6ES5 928-3UB12
CPU 948

The SINEC L1 submodule is equipped with a transmitter and a receiver for
20 mA current loop signals. Shown in the following figure is the circuitry for
the current loop signals:

Transmitter

+

+

Receiver

Current Direction Arrows

Partner

+

Receiver

+

Transmitter

CPU with
SINEC L1
Submodule

+

+

Figure 5-28

SINEC L1 Submodule: Loop Current Direction

Data transmission via the SINEC L1 interface always takes place at
9600 bps.

Application

Circuitry

Data Transmission
Rate

CPUs, Memory Cards, Memory Submodules, Interface Submodules