4 WIRING
E-15
4.1
Profibus-DP Connection Example
An example of Profibus-DP connection is shown below.
4.2
Precautions on Wiring
Take note the following precautions at wiring.
Connectable Maximum Number of Stations
Up to 32 slave stations can be connected.
Using a repeater, up to 126 slave stations can be connected.
Cables
Use the special A cable.
For other peripheral devices, refer to
Σ
-II series SGM
H/SGDH User’s Manual
(SIEPS80000005) and
Σ
-II series SGDH Profibus-DP Application Module User’s Manual
(SIE-C718-8).
Total cable length
The following table shows the relation between the baud rate and the communications dis-
tance when using the A cable.
Terminator
The last station in the network must have a terminator for electrical resistance.
M
SGDH
DP master device
DP slave devices
M
SGDH
M
SGDH
M
PROFIBUS−DP
PLC
NS500
Module
NS500
Module
NS500
Module
Motor
Motor
Motor
Motor
Inverter
Actuator
Sensor
Baud rate (kbps)
9.6
19.2
93.75
187.5
500
1500
12000
Communications
distance (m)
1200
1000
400
200
100
