X3/X4 (Profibus Dp / 24 V Dc) - Siemens SIPLUS HCS3200 Operating Instructions Manual

Connection

6.6 X3/X4 (PROFIBUS DP / 24 V DC)

6.6 X3/X4 (PROFIBUS DP / 24 V DC)
PROFIBUS DP
To enable communication between SIMATIC S7 / SIMOTION and the heating controller,
connect PROFIBUS DP to the CPU module through plug connection X3 / X4.
A bus terminating resistor is required for terminating the bus.
If the bus connector is located at the start or the end of a bus segment, the terminating
resistor must be connected. The bus terminating resistors are already integrated into the
Siemens bus terminators (6GK1 905-0DA10).
Make sure that stations with an activated terminating resistor are always supplied with power
during startup and operation.
Unused connectors must be fitted with a cover in the plant.
24 V DC power supply
The 24 V infeed is supplied via pins 1/2 or 3/4 of the PROFIBUS connector. The user must
ensure that the maximum current-carrying capacity of the connector of 10 A is not exceeded.
Pin assignment X3 / X4
Connection sockets X3 and X4 have the same pin assignment. Both connections are
internally linked 1:1. The signals can be transmitted further using daisy chaining.
Table 6- 2
Pin
1
2
3
4
Q
B
32
6-pin connection for 24 V DC and PROFIBUS DP
Assignment
Supply voltage 1: 24 V DC, for heating controller
Reference potential 1, for heating controller
Reference potential 2
Supply voltage 2: 24 V DC
PROFIBUS DP, A signal
PROFIBUS DP, B signal
Operating Instructions, 07/2014, A5E31278506C/002
SIPLUS HCS3200