Siemens ET 200pro Operating Instructions Manual page 314

Interface modules
12.2 Interface modules for PROFINET IO
Pin assignment of PROFINET IO and supply voltages on the CM IM PN PP FO connection module
View of the push-pull cable connector
Push-pull cable connector (1L+ and 2L+ supply voltages)
Push-pull cable connector (SC RJ)
314
Terminal Assignment
X03 DC 24V for feeding
X04 DC 24V for looping
1 1L+ electronics/encoder supply
2 Ground for electronics/encoder supply 1M
3 2L+ load voltage supply
4 Ground for load voltage supply 2M
5 Functional earth (FE)
X02 PN1 for feeding PROFINET
X02 PN2 for forwarding PROFINET
1 TX (Transmit Data)
2 RX (Receive Data)
Operating Instructions, 03/2013, A5E00335544-08
ET 200pro distributed I/O system