Important Notes
iv
FM 456-2 Application Function Module Installation, Hardware, and Startup
C79000-G7076-C458-01
What is New in the FM 456-2?
In comparison to the FM 456-4, the preceding product, the FM 456, shows the
following alterations:
Feature
FM 456-4 (old)
FM 456-2 (new)
Processor
80486DX, 75 MHz
Pentium, 120 MHz
SRAM, buffered
64 Kbytes
256 Kbytes
Reading and
writing of records
only SD0 and SD1 system records
all system and user records
Main memory
suitable for expansion with 16 MB RAM 16 MB RAM installed
Operating system
M7-SYS up to V2.0 inclusive
M7-SYS RT up to V4.0 inclusive
M7-SYS RT from V5.0
Width
25 mm (1”)
50 mm (2”)
OSD
(Flash EPROM)
yes
no
Approvals
The following approvals have been granted for the S7-400/M7-400:
UL recognition mark
Underwriters Laboratories (UL) to
standard UL 508, report E 85972
CSA certification mark
Canadian Standard Association (CSA) to
standard C 22.2 No. 142, report LR 63533
FM approval
according to Factory Mutual Approval Standard
Class Number 3611, Class I, Division 2, Group A, B, C, D.
For further information, please refer to Chapter 1 of the
reference manual /1/.
CE Marking
This product complies with the requirements of the EU directives which are listed
in Chapter 1 of
reference manual /1/.