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Power and Compatibility

B-7

SIMATIC 545/555/575 System Manual

B.2 Module Compatibility with CPUs

Unmodified Series 505 discrete I/O modules manufactured prior to

January, 1988 are unable to report module status and, therefore, cannot be

recognized by the 545, 555, or 575 CPU (that is, inputs are not read and

outputs are not written). Series 505 discrete I/O modules manufactured in

January, 1988 or later and those manufactured prior to this date that have

been modified do contain the status-reporting mechanism, and are

compatible with 545, 555, or 575 CPUs.

The Series 505 32-Input Simulator (PPX:505–6010) and 32-Output

Simulator (PPX:505–6011) are also affected by this compatibility restriction.

NOTE: Note 1 in Table B-3 identifies all affected modules.

The following modules are fully compatible with 545, 555, and 575 CPUs,

regardless of the manufacturing date.

• All Series 500 I/O, and all non-discrete (for instance, analog) Series 505

I/O, with the exception of the High Speed Counter, as described on

page B-8

• Series 505 8-Channel Word Input (PPX:505–6308) and 8-Channel

Word Output (PPX:505–6408)

The serial number found on each module contains the manufacturing date

of the module. The fifth through the eighth characters of the serial number

determine the manufacturing date; see Figure B-1.

NOTE: Units manufactured prior to January, 1988 that have been modified

have the letter G immediately following the serial number.

Before you install Series 505 discrete modules into a 545/555/575 system,

check the serial number of each module to ensure it is compatible with the

545/555/575 CPU.

I/O Modules Not

Compatible with

CPUs

Determining the

Compatibility of a

Module

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Siemens SIMATIC TI500 Spezifikationen Seite 257