JN5-CM-PDP User Manual
File No.:R09-PBUS-D20 Version:01
8
2.6 Electronic Isolation
The following electrical isolation should be provided for the
JN5-CM-PDP
module:
Note: Can’t use
A510
user 24V to connect
JN5-CM-PDP
input, otherwise
JN5-CM-PDP
is no
islanded with
A510
.
2.7 Data Transfer Rate and Distance
JN5-CM-PDP
module automatically detects the baud rate in the PROFIBUS-DP network after it is
power on. However, this requires that at least one master station sends valid telegrams in the
network.
The following transfer rates are supported:
9.6Kbit/s to 6000Kbit/s.
Two types of bus cable are specified in IEC 61158. Cable type B should no longer be used with
new applications because it has bee discontinued. Cable type A allows all transfer rates up to
12000Kbit/s to be used. Cables for burial in the ground, festoon suspension and drum cables are
also available.
The cable parameters are as follows:
Parameter
Cable type A
Surge impedance in
Ω
135~165
Ω
(at 3~20MHz
）
Effective capacitance
<30 (pF/m)
Loop resistance
<110 (
Ω
/Km)
Core diameter
>0.64 (mm)
Core cross section
>0.34 (mm
2
)
Distance between stations when using type A cable to IEC 61158:
Baud rate (Kbit/s)
Max. cable length type A cable (m)
9.6 1200
19.2 1200
93.75 1200
187.5 1000
500 400
1500 200
3000 100
6000 100