User's Manual

Siemens PLT 112 · 2002
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Bus communication
CS-L2 bridge
Central processing unit
■ Overview
CPU 486-3
The CPU 486-3 is equipped with an Intel Pentium 75-MHz pro-
cessor.
The front panel of the rugged, compact plastic housing contains:
• LEDs for status and fault display
• Operating mode switch
• Slot for a memory card from which the coupling software and
bus parameters are loaded into the main memory when start-
ing up
• 2 slots for interface modules
■ Design
Memory module (set with 2 x 8 Mbyte)
The CPU 486-3 used in the CS-L2 bridge is supplied with an
integral RAM. The module used as the main memory comprises
a set with 2 x 8-Mbyte RAMs. The complete set must always be
inserted.
I & C monitoring
I & C monitoring functions can be implemented using the
IF 961-DIO interface module for digital input/output.
The interface module is inserted in the EXM 478-3 module of the
AS 488 automation system.
The IF 961-DIO can be used to record I & C signals e.g. for
• door contact
• excess temperature
• monitoring of optical link module OLM
and to activate a cabinet lamp or horn.
Cable monitoring, e.g. to detect an open-circuit, is not possible.
The inputs and outputs are electrically isolated. The module
electronics (ASIC) is protected against overvoltages by appro-
priate circuitry measures.
The digital inputs comprise 8 channels organized in groups of
4 x 2 channels. The current consumption is 8.5 mA with an input
level of DC 24 V.
An input delay of 500 ms or 3 ms can be parameterized for all
input channels together.
The cable length is:
• unshielded 200 m (for 500 ms) or 600 m (for 3 ms)
• shielded 1000 m.
The digital outputs also comprise 2 x 4 channels. With DC 24 V,
the max. output current is 100 mA. The outputs are protected
against short-circuit by an electronic fuse.
A 25-contact Sub-D socket is used as the interface.
IF 962-COM serial interface module
The IF 962-COM serial interface module is required to connect a
commissioning terminal to the CS-L2 bridge. The module is in-
serted into a prepared slot in the CPU 486-3.
■ Ordering Data
Order No.
CPU 486-3 central module
with Pentium 75 MHz CPU, 2 slots
for interface modules,
2 standard slots wide
6ES7 486-3AA00-0AB0
IF 961-DI0 interface module
Digital input/output for I & C moni-
toring functions
6ES7 961-1AA00-0AC0
IF 962-COM serial interface
module
for commissioning terminal,
with 2 RS 232 interfaces
6ES7 962-3AA00-0AC0
This catalog is out of date, see note on page 3