IC-WE Datasheet, PDF (7/10 Pages) IC-Haus GmbH – 3-CHANNEL 75 Ω LINE DRIVER

iC-WE
3-CHANNEL 75 Ω LINE DRIVER
Rev D1, Page 7/10
EXAMPLE 1: Balanced data transmission over twisted-pair cables
For balanced data transmission two iC-WE devices can be operated in parallel at the inputs with different
programming of the individual INVert input. The OC error outputs NER are linked for the system fault message.
ERROR
TRI-STATE
CMOS/TTL -
INPUTS
D1
D2
D3
+5 V +24 V
+24 V
10 _{TNER MODE}
2
12
VCC
VB
ERROR
NER ³
8 _TRI
9 _INV
LOW VOLTAGE
T.SHUTDOWN
SO20 iC-WE
1
E1
A1 ¹¹
CHAN1
20
E2
CHAN2
13
A2
19
E3
CHAN3
GND
4-7,14-17
A3 ¹⁸
ERROR
+5 V +24 V
10 _{TNER MODE}
2
12
VCC
VB
ERROR
3
NER
8
TRI
9 _INV
LOW VOLTAGE
T.SHUTDOWN
SO20 iC-WE
1
E1
11
A1
CHAN1
20
E2
CHAN2
13
A2
19
E3
CHAN3
GND
4-7,14-17
A3 ¹⁸
LINE 100 m
PLC
Fig. 4: Balanced data transmission
EXAMPLE 2: Incremental encoder
Fig. 5 shows the iC-WE being used in an optical encoder system together with the iC-Haus incremental encoder
iC-WT.
The iC-WT device is an evaluating IC for photodiode arrays used in incremental lengths and angle measuring
systems. It preprocesses the sensor signals for transmission with line driver iC-WE. At the receive end the
programmable logic controller (PLC) interface can be via optocoupler.
The preprocessed sensor signals are transmitted over cable by the iC-WE with asymmetrical activation. A high
interference immunity is achieved as a result of the high output amplitude and the integrated characteristic
adaption of the iC-WE.
The 24 V power supply is conducted over the cable from the PLC end. A voltage regulator generates the 5 V
supply to the encoder system. It is favourable to use the iC-WD switching regulator device instead of
aconventional voltage regulator. This switched-mode power supply IC operates from 8 to 30 V input voltage and
contains two 5 V post regulators. Analog and digital devices can thus receive separate supply voltages.