Siemens SIMATIC S7-1500 System Manual page 36

Application planning
3.1 Hardware configuration
Applicable modules
The following table shows which modules may be used in the various slots:
Table 3- 2
Mo dule type
Load current supply (PM)*
System power supply (PS)
Interface module
Analog and digital I/O modules
Communications modules
•
Technology modules
* No connection to the backplane bus.
** When slot 0 is occupied by a load current supply (PM) in STEP 7, this slot can no longer be used
for a system power supply (PS) in STEP 7. You do not have to configure a load current supply
(PM) in STEP 7.
36
Assignment of slot numbers
Point-to-point
Pe rmissible slots
0**
0; 2 - 31
1
2 - 31
2 - 31
2 - 31
Ma ximum number of modules
Unlimited / only 1 PM can be
configured in STEP 7
3
1
30
30
30
Automation system
System Manual, 09/2016, A5E03461182-AD