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5. PROCEDURES BEFORE SYSTEM OPERATION
5.5
Wiring
5.5.1
This section explains the wiring to PROFIBUS connector for AJ71PB96F/A1SJ71PB96F
(1) Pin assignments for the connector
Pin No.
1
2
3
4
5
6
7
8
9
*1 Signal is optional.
*2 Signal is only necessary at a station at the end of the bus cable.
(2) Wiring
Remark
• To apply to the EMC standard:
Read the Section for the Installation in the A1S/A2SCPU User's Manual (Hardware). (after the Ib-
66468-E)
• Please use the PROFIBUS cable with braided shield.
5.5.2 Terminal switch
Whether or not to set the built-in module terminal resistance (1/2W 150Ω × 2 units) can be selected by
connecting a switch. (The stations on both ends of the PROFIBUS segment must be connected with
terminal resistor.)
TERMINATOR
When the AJ71PB96F/A1SJ71PB96F's bus termination switch is set to on (has terminal resistor), do
not remove the PROFIBUS cable from the AJ71PB96F/A1SJ71PB96F during PROFIBUS-FMS
network operation. If the cable is removed, then the terminal resistor in the network will disappear,
causing an error and bringing down the network.
PROFIBUS Cable Wiring
Symbol
Name
SHIELD*1
RP*1
A/A'
RxD/TxD-P
CNTR-P*1
C/C'
DGND
VP*2
RP*1
B/B'
RxD/TxD-N
CNTR-N*1
AJ71PB96F/A1SJ71PB96F
1
SHIELD
3
RxD/TxD-P
8
RxD/TxD-N
Silk display
Connects terminals resistor
Application
Shield, Protective Ground
Reserved for Power
Receive/Transmit Data-P
Control-P
Data Ground
Voltage-Plus
Reserved for Power
Receive/Transmit Data-N
Control-N
PROFIBUS cable
ON
5-7
MELSEC-A
OFF
Disconnects terminal resistor
(setting at time of shipment)
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