Technical data

Bus connectors and preassembled cables
6.5 M12 bus connector
PROFIBUS Network Manual
System Manual, Edition 04/2009, C79000-G8976-C124-03
171
Pin assignment
View of the contact
face
Pin
(6GK1 905-0EA00)
Lead Socket
(6GK1 905-0EB00)
View of the contact face
Pin 1 not used Pin 1
Pin 2 PROFIBUS A, green Pin 2
Pin 3 not used Pin 3
Pin 4 PROFIBUS B, red Pin 4
Pin 5 Optional: Shield Pin 5
Threaded joint Shield Threaded joint
6.5.4 Inserting an M12 bus connector in a module
Properties
The M12-PROFIBUS connector of a device consists of an M12 socket for the incoming bus
signal and an M12 male connector for looping through the signal. This means that the M12
connector must be equipped with socket contacts for the incoming cable and pin contacts for
the outgoing cable.
Connecting the bus connector
To connect the bus connector to the device, follow the steps below:
1. Turn the connector so that the slot and key of the mating mechanism fit together.
2. Plug the bus connector loosely into the module.
3. By carefully turning the male connector, make sure the connector and socket are properly
interlocked (slot and key).
4. Secure the bus connector to the module with the locking nut (tightening torque 0.6 ±
0.1 Nm).
Terminating resistor and the start or end of a segment
If the device is located at the start or end of a segment, you will need to screw a bus
terminating resistor with pin contacts (6GK1 905-0EC00) or with socket contacts
(6GK1 905-0ED00) to the second bus connector of the device.
Closing unused M12 connection points
Close all unused M12 connection points with sealing caps (3RX9 802-0AA00) to achieve
degree of protection IP65 or IP67 (tightening torque 0.6 ± 0.1 Nm).