Electrical Parameters Of Encoder Power Supply - Siemens SIMATIC S7-300 Manual

Encoder Both encoders that can be connected directly and EXEs must meet the fol-
characteristics
lowing requirements:
Incremental Encoders
Transfer procedure:
Output signals:
Maximum output frequency: 1 MHz
Phase shift, track
A to B:
Power consumption:
Absolute Encoders (SSI)
Transfer procedure:
Output signals:
Input signals:
Resolution:
Maximum transfer frequency: 1.25 Mbps
Power consumption:
Encoder power The 5 V or 24 V power supply to the encoders is generated within the module
supply and is available on the female sub-D connector, and so you can power the
encoders by way of the connecting cable, without additional wiring. The
available voltage is electronically protected against shorting and thermal
overload, and is monitored.
Table 4-6
5 V power supply
Voltage
Ripple
Current carrying capacity
24 V power supply
Voltage
Ripple
Current carrying capacity
FM 354 Servo Drive Positioning Module
Differential transfer with 5 V rectangular
signals (such as RS422 standard)
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
Not more than 300 mA
Synchronous-serial interface (SSI) with
5 V differential-signal transfer
signals
(such as RS422 standard)
Data as true and negated signal
Sliding pulse as true and negated signal
Not more than 25 bits
Not more than 300 mA

Electrical parameters of encoder power supply

Parameters
Wiring the FM 354
, U
a1
, U
a2
Min Max
5,1 5,3
50 mV
0,3
20,4 28,8
3,6
0,3
)
a1
)
a2
Unit
V
ss
A
V
V
ss
A
4-9