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EX500 Serial System
6. How to operate EX500 - GPR1 ( PROFIBUS-DP )
6 -1. Communication wiring
A twisted pair cable with shield is used in the
communication wiring of PROFIBUS- DP.
A maximum length of cable depend on
communication speed.
The specification of cable length is based on
TYPE A cable which has parameters shown below.
・ ・ ・ ・ Communication speed and Longest wiring length
Communication
speed
[k bit/sec]
Wiring
length
・ ・ ・ ・ Terminating resistance
It is necessary to attach terminating
resistance to the units located at the
ends of transmission line.
Refer to section 6 -4 -2, for setting
the terminating resistance.
6 -2. Parts description
Power supply connector
Communication port A
Communication port B
Communication port C
Communication port D
a. Fieldbus connector
b. Power supply connector
c. Communication port
d. LED display window
e. Station switch protection cover
！ ！ ！ ！
CAUTION
The station switch protection cover should be tightened with specified tightening torque
after it is opened. ( Tightening torque : 0.6 N・m )
9.6
19.2
[k bit/sec]
1200
[m]
Fieldbus connector
(PROFIBUS-DP)
・ ・ ・ ・ Cable specification
Impedance
Capacitance between
conductors
Conductor resistance
Cable diameter
Conductor area
93.75
187.5
[k bit/sec]
[k bit/sec]
1000
[m]
VP
390 ohms
Data Line
RxD/TxD-P
220 ohms
Data Line
RxD/TxD-N
390 ohms
DGND
: Port for PLC connection.
: The power source for Input Unit, SI Unit, and control and
for the solenoid valve is connected through this port.
:
Input Unit Manifold or the Manifold Valve with
the SI Unit is connected through this port.
: The state of the power source supply and the PLC
communication is displayed. ( Refer to section 6 -3 )
: Switches for the operation setting are inside.
( Refer to section 6 -4 )
- 25 -
135 ohms to 165 ohms
30 pF / m or less
110 ohms / km
0.64 mm
0.34 mm
500
1.5
[k bit/sec]
[M bit/sec]
400
200
[m]
[m]
LED display window
Station switch protection cover
EX## - OME0008
2
or more
12
[M bit/sec]
100
[m]
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