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Publication 1747-UM011G-EN-P - June 2008
Selecting Your Hardware Components
43
Memory Backup for the 1747-L511, SLC 5/01 Processor
The curve below illustrates the ability of the memory back-up
capacitor to maintain the contents of the RAM in a 1747-L511
processor. To back up the memory for a longer period of time, a
lithium battery, catalog number 1747-BA, is required.
Selecting a Memory
Module for SLC 5/03,
SLC 5/04, and SLC 5/05
Processors
The memory module for the SLC 5/03, SLC 5/04, and SLC 5/05
processors is called Flash EPROM (Flash Erasable Programmable Read
Only Memory). Flash EPROMs combine the programming versatility of
EEPROMs with the security precautions of UVPROMs. This means that
you have the option of leaving your EPROM programs write-protected
or unprotected. Write-protect the EPROM by using either your
software or a PROM programmer.
The memory modules consist of a Flash EPROM mounted on a circuit
board with a connector and plastic housing.
Adapter sockets (catalog number 1747-M15) are required when
inserting memory modules into commercially available PROM
0
0 5
(41˚F)
20
(68˚F)
25
(77˚F)
10
(50˚F)
15
(59˚F)
40
(104˚F)
45
(113˚F)
50
(122˚F)
55
(131˚F)
60
(140˚F)
30
(86˚F)
35
(95˚F)
5
10
15
20
25
30
Temperature °C (°F)
Time
(Days)
Capacitor Memory Back-up Time VS Temperature