Installing the Control System
2-12
SINUMERIK 802C base line
Start-Up
Cable lengths
The maximum cable length depends on the specifications of the encoder
power supply and on the transmission frequency.
To provide fault-free operation, make sure that the following values are not
exceeded when using preassembled interconnecting cables from SIEMENS:
Table 2–6 Maximum cable lengths depending on the encoder power supply
Supply Voltage Tolerance Current Consumption
Max. Cable
Length
5 V DC 4.75 V...5.25 V < 300 mA 25 m
5 V DC 4.75 V...5.25 V < 220 mA 35 m
Table 2–7 Maximum cable lengths depending on the transmission frequency
Encoder Type Frequency Max. Cable Length
1 MHz 10 mincremental
500 kHz 35 m
2.3.3 Configuration of the RS232 interface connection (X2)
Pin assignment of connector on the CNC side
RS232 interface
Connector designation: X2
RS232
Connector type: 9-pin sub-D plug connector
Table 2–8 Pin assignment of connector X2
Pin Name Type Pin Name Type
16DSRI
2RxD I 7RTS O
3TxD O 8CTS I
4DTR O 9
5M VO
1
5
6
9
Signal description:
RxD Receive Data
TxD Transmit Data
RTS Request to send
CTS Clear to send
DTR Data Terminal Ready
DSR Data Set Ready
M Ground
Signal level
RS232
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