Siemens Simatic S7-1500 Manual page 30

Connecting up
Note
Supply of I/O devices
The CPU 1516-3 PN/DP does not provide a 24 V DC power supply on the PROFIBUS
interface. I/O devices (for example, PC adapter USB 6ES7972-0CB20-0XA0) are only
operational on the interface in conjunction with a plug-in power supply set for external power
supply.
The innovative successor product, PC adapter USB A2, receives the required power supply
via the USB port. This means it does not need a 24 V DC supply voltage and can be
operated without a plug-in power supply set for external power supply.
Reference
You can find additional information on the topics of "Connecting the CPU" and
"Accessories/spare parts" in the S7-1500, ET 200MP
(http://support.automation.siemens.com/WW/view/en/59191792) system manual.
Assignment of the MAC addresses
CPU 1516-3 PN/DP has two PROFINET interfaces, with the first interface having two ports.
The PROFINET interfaces each have a MAC address, and each of the PROFINET ports has
its own MAC address. The CPU 1516-3 PN/DPtherefore has five MAC addresses in total.
The MAC addresses of the PROFINET ports are needed for the LLDP protocol, for example
for the neighborhood discovery function.
The number range of the MAC addresses is sequential. The first and last MAC address are
lasered on the rating plate on the right side of each CPU 1516-3 PN/DP.
The table below shows how the MAC addresses are assigned.
Table 3- 2
MAC address 1
MAC address 2
MAC address 3
MAC address 4
MAC address 5
30
Assignment of the MAC addresses
Assignment
PROFINET interface X1
(visible in STEP 7 for accessible devic-
es)
Port X1 P1 R (required for LLDP, for
example)
Port X1 P2 R (required for LLDP, for
example)
PROFINET interface X2
(visible in STEP 7 for accessible devic-
es)
Port X2 P1 (required for LLDP, for
example)
Labeling
Front, lasered
•
Right side, lasered
•
(start of number range)
Front and right side, not lasered
•
Front and right side, not lasered
•
Front, lasered
•
Right side, not lasered
•
Front, not lasered
•
Right side, lasered
•
(end of number range)
CPU 1516-3 PN/DP (6ES7516-3AN01-0AB0)
Manual, 09/2016, A5E03461313-AD