A
A-5
FM 351 Positioning Function Module
EWA 4NEB 720 6001-02
Current Consumption and Power
Supply of digital inputs and outputs Supply voltage: 24 VDC
(permissible range: 20.4 to 28.8 V)
Current consumption from 2L+ (without load):
Max. 50 mA (X1, Terminal 19)
Permissible potential difference between input
ground connection 1M (X1, Terminal 2)
– and the central grounding point (shield): 60
VAC; 75 VDC
– Insulation tested with 500 VDC
Permissible potential difference between input
ground connection 2M (X1, Terminal 20)
– and the central grounding point (shield):
60 VAC; 75 VDC
– Insulation tested with 500 VDC
Encoder Inputs
Displacement measurement Incremental
Absolute
Signal voltages Symmetrical inputs: 5 V to RS 422
Asymmetrical inputs: 24 V/typ. 4 mA
Input frequency and line length for symmetrical encoder
with 5 V supply
Max. 500 KHz for 32 m shielded line length
Input frequency and line length for symmetrical encoder
with 24 V supply
Max. 500 KHz for 100 m shielded line length
Input frequency and line length for asymmetrical encoder
with 24 V supply
Max. 50 KHz for 25 m shielded line length
Max. 25 KHz for 100 m shielded line length
Data transfer rate and line length for absolute encoders Max. 250 KHz for 160 m shielded line length
Max. 500 KHz for 60 m shielded line length
Max. 1 MHz for 20 m shielded line length
Monitoring possible for absolute encoders No
Input signals Incremental: 2 pulse trains, 90° offset, 1 zero pulse
Absolute: Absolute value
Digital Inputs and Outputs
Shielded line length 600 m
Load voltage reverse polarity protection No
Status indication Yes, green LED per channel
Digital Inputs
Number of inputs 8
Number of simultaneously controllable digital inputs 8
Electrical isolation Yes, optocoupler
Input voltage 0-signal: -3 V to 5 V
1-signal: 11 V to 30 V
Technical Specifications
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