Siemens SINUMERIK 840Di - Page 112

06.03
2.13 ADI4 (analog drive interface for 4 axes) (SW 09.01 and higher)
2-112
 Siemens AG, 2003. All rights reserved
SINUMERIK 840Di Manual (HBI) – 06.03 Edition
S Connectable measuring systems:
Incremental encoders (TTL)
– Differential transmission with RS-422 (5V or 24V):
Track A as a true and negated signal (U
a1
, U
a1
)
Track B as a true and negated signal (U
a2
, U
a2
)
Zero signal N as a true and negated signal (U
a0
, U
a0
)
– Max. output frequency: 1.5MHz
– Phase shift of track A to B: 90_"30_
– Power consumption: max. 300mA
Absolute encoder (SSI)
– Transmission procedure: Synchronous-serial interface (SSI) with 5V
Differential signal transmission (RS-422 standard):
Output signal: Data as a true and negated signal
Input signal: Shift cycles as a true and negated signal
– Resolution: max. 25 bits
– Max. transmission frequency: 1 Mbps
– Power consumption: max. 300mA
Notice
Only SSI Multiturn encoders can be used as absolute measuring systems.
Further measuring systems:
– Encoders with SINE/COSINE signals (e.g. 1Vpp) can be connected
through external pulse shaper electronics (EXE) that convert the signals
to 5V TTL levels.
2 Hardware Descri
p
tions