Fagor CNC 8065, Hardware Configuration

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Hard ware confi gura tion
CNC 8065
4.
(R
EF
: 1404)
CENTRAL UNI
T I
CU.
4.9 RS485 serial line connection.
Pinout of the central unit connector.
9-pin male SUB-D type connector.
Pins 6-8 and 7-9 are internally jumpered, thus either one can be used in the connection. The
reserved pins must NOT be used in any case.
Cable characteristics.
Twisted-pair shielded cable should be used to minimize interference between cables, thus
preventing poor communication in long lengths.
Node connection.
Line terminating resistor.
Module interconnection.
The cable shield must be connected to the connector at both ends. It is recommended to
reference all the control and data signals to the same point (pin 5 GND), thus avoiding
reference points with different voltages because there could be voltage differences in long
lengths between the two ends of the cable.
Characteristic.
Type. Shielded. Twisted-pair, with a minimum wire section of 0.20 mm² (24 AWG).
Impedance. 120
Ω
.
Maximum length. 1200 m (3937 ft).
The elements located at the ends of the bus must have the line
terminating resistor activated. The central unit has the resistor inside
at pins 2 and 3; to activate it, jumper pin 2 with one of the pins 6/8 and
pin 3 with one of the pins 7/9.
Pin. Signal. Description.
1 - - - - - -
2 LineTerm 120
Ω
line terminating resistor.
3 LineTerm 120
Ω
line terminating resistor.
4 - - - - - -
5 GND Reference signal.
6 TxD RxD Data send/receive.
7 /TxD RxD Data send/receive.
8 TxD RxD Data send/receive.
9 /TxD RxD Data send/receive.
1
5
6
9
Pin
GND
/Line Term
Line Term
5
4
3
2
1
9
8
7
6
/TxD /RxD
TxD RxD
/TxD /RxD
TxD RxD