Connection Of The Electrical Rs-485 Bus Cables; Figure 5-6 Drilling Measures For The Mounting Plate, All Dimensions Are Millimeter; Figure 5-7 Electrical Port, Connector Assignment D-Sub Jack - Siemens OLM/P11 V4.0 Operating Instructions Manual

Installation and Maintenance

5.3 Connection of the Electrical RS-485 Bus Cables

0 10,15
Figure 5-6
Drilling measures for the mounting plate, all dimensions are millimeter
5.3 Connection of the Electrical RS-485 Bus Cables
Pin
5
9
4
8
3
7
2
6
1
1, 2, 7, 9
Figure 5-7 Electrical port, connector
assignment D-sub jack
SIMATIC NET PROFIBUS, Optical Link Module
Operating Instructions, 07/2008, A2B00065774O, Edition V1.5
71
37,35 60,15
Assignment
3 RxD/TxD, P
8 RxD/TxD, N
5 Ground
6 +5V Output
4 RTS
vacant
3x Ø3,5
The modules are equipped with an electrical port with RS-485
level. It is designed as 9-pin D-sub jack with screw locking
mechanism (inner thread UNC 4-40).
The pin assignment corresponds to the PROFIBUS standard
assignment. A short-circuit proof 5 V output for the supply of
external pull-up/pull-down resistances is available at pin 6. The
resistances must have a power loss of at least 0.25 W. The RS-
485 bus cables RxD/TxD, N and RxD/TxD, P are galvanically
isolated from the 24 V supply voltage within the SELV limits
(functional isolation).
The RS-485 interface is electrically connected with the housing.
33