Siemens SINUMERIK 802S Start-Up page 28

Installing the Control System
2.3 Connecting the individual components
Signal level
RS422
Signal type
VO
I
Encoder types which can be connected
Incremental 5 V encoders can be connected directly.
Characteristics
The encoders must meet the following requirements:
Transmission method:
Output signals:
Max. output frequency: 1.5 MHz
Phase offset between
tracks A and B:
Current consumption:
Cable lengths
The maximum cable length depends on the specification of the encoder supply and on the
transmission frequency. When using preassembled cables from SIEMENS, the following va-
lues may not be exceeded to ensure interference–free operation:
Table 2-9
Supply Voltage
5 V DC
5 V DC
Table 2-10
Encoder Type
Incremental
2-28
Voltage output (supply)
5V input (5V signal)
Differential transmission with 5 V square–wave
signals
Track A as true and negated signal (U
Track B as true and negated signal (U
Zero signal N as true and negated signal
(U , U )
a0 a0
90° "30°
max. 300 mA
Maximum cable length with respect to the encoder supply
Tolerance
4.75 V...5.25 V
4.75 V...5.25 V
Maximum cable lengths with respect to the transmission frequency
1 MHz
500 kHz
a1
a2
Current
Consumption
< 300 mA
< 220 mA
Frequency
, U )
a1
, U )
a2
Max.
Cable Length
25 m
35 m
Max. Cable Length
10 m
35 m
SINUMERIK 802S
6FC5 597–2AA00–0BP2 (01.02)