Siemens SINUMERIK 840Di - Page 111

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
x300 mA
25m
4.75V – 5.25V
x220 mA
35m
Supply voltage 24VDC
Tolerance Power
consumption
Max. cable length
20.4V – 28.8V
x300 mA
100m
11V – 30V
x300 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 Descri
p
tions