Siemens Pointek CLS 200 Instruction Manual page 64

PROFIBUS PA connection via M12 plug
If an M12 plug is already installed on the housing of Pointek CLS 200, you will need a
female M12 receptacle on the end of the cable, to complete the bus connection to
PROFIBUS PA.
Follow the instructions accompanying the female receptacle. The pin assignment is
1
shown below.
4
3
1
2
PIN PROFIBUS PA
1 PA+
2 not connected
3 PA–
4 shield, connected to ground
Pin assignment: device side
1.
Although the PROFIBUS PA recommendation is usually to ground the shield on both the device
side and the cable side (to avoid interference), in some cases, it may be preferable to ground one
side only, to avoid ground loops.
This is particularly important if the device is mounted on cathodically protected tanks.
Page IIC–62 Pointek CLS 200 (PROFIBUS PA) – INSTRUCTION MANUAL
lid
digital display
lid clip
thread M12 x 1
Front view of pin insert
and pins
positioning lug
1
M12 plug
(device side)
M12 receptacle
(cable side)
3
2
PIN PROFIBUS PA
1 PA+
2 not connected
3 PA–
4 shield, connected to ground
Pin assignment: cable side
4
Front view of sleeve
Front view of sleeve
insert and sleeves
insert and sleeves
1
positioning
nut
1
7ML19985AR02