Hardware configuration.
CNC 8070
5.
CENTRAL
UNIT + MONITO
R (ETX PLATFORM).
Conn
ecti
ons.
·86·
(R
EF
: 1911)
5.12.4 RS485 serial line connection.
Connector pinout.
Plug-in part. 9-pin female 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.
Interconnection of modules.
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
.
Maximum length.
15 m (50 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
line terminating resistor.
3
LineTerm
120
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
TxD RxD
/Line Term
Line Term
/TxD /RxD
TxD RxD
GND
/TxD /RxD
6
3
2
9
8
5
7
/TxD /RxD
TxD RxD
GND
Housing
Housing
1
4
CNC
Summary of Contents for CNC 8070
Page 1: ...Ref 1911 8070 CNC Hardware configuration...
Page 8: ...BLANK PAGE 8...
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Page 28: ...Hardware configuration CNC 8070 1 PREVIOUS INFORMATION 28 REF 1911...
Page 94: ...Hardware configuration CNC 8070 6 CENTRAL UNIT MONITOR Q7 A PLATFORM 94 REF 1911 C70 15AT...
Page 273: ...Hardware configuration CNC 8070 273 User notes REF 1911...
Page 274: ...Hardware configuration CNC 8070 274 User notes REF 1911...
Page 275: ...Hardware configuration CNC 8070 275 User notes REF 1911...