iC-WE
3-CHANNEL 75
Ω
LINE DRIVER
Rev D1, Page 8/10
The error input TNER on the iC-WE can be utilized to conduct a fault signal from the incremental encoder to the
output NER and then to the receiver.
For protection against voltage peaks from the cable, the state input TRI is wired to the RC combination R1, R2
and C5, which can be dimensioned for levels of up to 30 V at the PLC.
Fig. 5: Line driver iC-WE in the incremental encoder
PRINTED CIRCUIT BOARD LAYOUT
The iC-WE's 8 GND terminals (pins 4-7 and 14-17) simultaneously function as thermal conductors and must be
soldered to copper tracks with the greatest possible area of the PCB to ensure proper heat dissipation.
Blocking capacitors to smooth the local IC supply voltages must be connected to VCC, VB and GND pins at the
shortest possible intervals. C1 on the regulator in Fig. 3 is only necessary if the voltage regulator is more than
about 3 cm away from the other ICs. C3 should not be less than 1 µF in order to block the 24 V supply.
ICHAUS [ IC-HAUS GMBH ]
