PROFIBUS DP Communication Port Wiring Terminal Characteristics
General
The main physical characteristics of a PROFIBUS DP port are:
|
Physical interface |
Multipoint 2-wire RS 485 - electrical networking |
|
Connector |
Terminal block and SUB-D 9 |
Physical Interface and Connectors
The LTMR controller is equipped with two connector types, on the front face:
-
A shielded SUB D 9 socket connector,
-
An open-style removable terminal block.
Both connectors are electrically identical. They follow the PROFIBUS DP interoperability standards.
 CAUTION |
|---|
|
unintended equipment operation
Pin VP of the terminal block is used for the line termination
resistance connection. Do not connect any power supply on it.
Failure to follow these instructions can result in injury or equipment damage.
|
SUB-D 9 Connector Pinout
The SUB-D 9 wiring layout is as follows:
|
Pin No. |
Signal |
Description |
|---|---|---|
|
1 |
(Shield) |
Not used |
|
2 |
M24 |
Not used |
|
3 |
RxD/TxD-P (B) |
Positive data transmission (RD+ / TD+) = B |
|
4 |
CNTR-P |
Positive repeater monitoring signal (direction monitoring) |
|
5 |
DGND |
Data transmission ground |
|
6 |
VP |
Line termination bias voltage |
|
7 |
P24 |
Not used |
|
8 |
RxD/TxD-N (A) |
Negative data transmission (RD- / TD-) = A |
|
9 |
CNTR-N |
(Negative repeater monitoring signal, direction monitoring) Not used |
Open Style Terminal Block
The LTMR controller has the following PROFIBUS DP network plug-in terminals and pin assignments.
|
Pin |
Signal |
Description |
|---|---|---|
|
1 |
Shield |
Shield |
|
2 |
RxD/TxD-N (A) |
Negative data transmission (RD- / TD-) = A |
|
3 |
RxD/TxD-P (B) |
Positive data transmission (RD+ / TD+) = B |
|
4 |
DGND |
Data transmission ground |
|
5 |
VP |
Line termination bias voltage |
Open-Style Terminal Block Characteristics
|
Connector |
5 pins |
|
Pitch |
5.08 mm (0.2 in.) |
|
Tightening torque |
0.5...0.6 N•m (5 lb-in) |
|
Flat screwdriver |
3 mm (0.10 in.) |