06.03
2.13
ADI4 (analog drive interface for 4 axes) (SW 09.01 and higher)
2-111
Siemens AG, 2003. All rights reserved
SINUMERIK 840Di Manual (HBI) – 06.03 Edition
S
Maximum cable lengths
The max. cable length depends on the following parameters:
1st
encoder power supply
Supply voltage 5VDC
Tolerance
Power
consumption
Max. cable length
4.75V – 5.25V
x
300 mA
25m
4.75V – 5.25V
x
220 mA
35m
Supply voltage 24VDC
Tolerance
Power
consumption
Max. cable length
20.4V – 28.8V
x
300 mA
100m
11V – 30V
x
300 mA
300m
2nd transmission frequency
Encoder type
Supply voltage
Frequency
Max. cable length
incremental (TTL)
5V
1MHz
10m
(
)
500kHz
35m
24V
500kHz
150m
absolute (SSI)
24V
1.5 Mbps
10m
(
)
187.5 Kbps
250m
Note
If cable lengths longer than 25m or 35m are required with incremental encod-
ers, you can use encoder types with a supply voltage of +24VDC instead.
Caution
To ensure error-free transmission of encoder data, do not exceed the max.
cable lengths shown in the table.
S
Specification of the encoder supply voltages
:
Table 2-30
Specification of the encoder supply voltages
Supply voltage
1)
P5MS
P24SSI
Voltage
minimum
5.1V
20.4V
nominal
5V
24V
max.
5.3V
28.8V
Ripple
max.
3.6Vpp
Current load
per encoder connection
0.3A
max.
1.35A
1A
1) P5MS:
Supply voltage for encoders (+5VDC)
P24SSI:
Supply voltage for encoders (+24VDC)
2 Hardware Descriptions
Содержание SINUMERIK 840Di
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