User manual

Publication LOGIX-AP010B-EN-P - May 2010 17
Controllers and I/O Modules Chapter 1
S5 Controller Memory Use
Siemens recommends estimating 2 bytes of memory per each statement of
code.
If it is estimated that the program in the above example requires 25 tasks
containing an average of 100 lines of code each and each line of code has 10
statements, then the memory requirements would be:
25 x 100 x 10 x 2 = 50,000 = 50 KB
A spare capacity requirement of 25%:
50 KB x 1.25 = 62.5 KB
Digital Input Modules
The following table lists the available Siemens S5 Digital DC Input Modules.
Siemens S5 Digital DC Input Modules
Cat. No. Inputs Voltage
6ES5 420-4UA13/14 32 24V DC
6ES5 430-4UA13/14 32 24V DC
6ES5 420-8MA11 4 24V DC
6ES5 421-8MA12 8 24V DC
6ES5 422-8MA11 16 24V DC
6ES5 430-8MB11 4 24…60V DC
6ES5 431-4UA12 16 24…60V DC
6ES5 431-8MA11 8 24V DC
6ES5 432-4UA12 32 24V DC/alarm
6ES5 433-8MA11 8 5…24V DC
6ES5 434-4UA12 32 5 …15V DC