TI545/TI555 Controller and I/O Compatibility
C-3
TI545/TI555 System Manual
The serial number found on each module contains the manufacturing date
of the module. The fifth through the eighth characters of the serial number
determines the manufacturing date; see Figure C-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 TI545/TI555 system,
check the serial number of each module to ensure it is compatible with the
TI545/TI555 CPU.
High Speed Counter modules (PPX:505-7002) manufactured prior to May
1990 will not operate properly in a TI545/TI555 controller’s local base
configuration. If a High Speed Counter is placed in a TI545/TI555
controller’s local base configuration, the WX inputs will intermittently set to
FFs, which could cause improper operation.
NOTE:
High Speed Counter modules manufactured prior to May 1990 that
have been modified for TI545/TI555 controller’s local base compatibility
have the letter A immediately following the serial number.
Before you install Series 505 High Speed Counter modules into a
TI545/TI555 local base, check the serial number of each module to ensure
that it is compatible with the TI545/TI555 local base.
Do not use an unmodified Series 505 High Speed Counter module
manufactured prior to May 1990 in a TI545/TI555 controller’s local
base.
In a Series 505 High Speed Counter, WX inputs may change to FFs
that could change the High Speed Counter outputs to an unsafe
condition. This could result in death or serious injury and/or
damage to equipment.
Refer to the Safety Considerations Guidelines, part no.
2588015-0003 (shipped with each TI545/TI555 controller), for details.
Follow Siemens Industrial Automation, Inc.’s recommended safety
installation guidelines.
Determining the
Compatibility of a
Module
Series 505 High
Speed Counter
WARNING
!