ic-we iC-Haus, ic-we Datasheet - Page 7

• Manufacturer Part Number: ic-we
• Description: 3-channel 75 ? Line Driver
• Manufacturer: iC-Haus

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.
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.
CMOS/TTL -
INPUTS
iC-WE
3-CHANNEL 75 Ω LINE DRIVER
D1
D2
D3
TRI-STATE
ERROR
10
10
19
19
20
20
8
9
8
9
1
1
TNER
TNER
TRI
INV
TRI
INV
E1
E2
E3
E1
E2
E3
MODE
MODE
CHAN1
CHAN2
CHAN3
CHAN1
CHAN2
CHAN3
SO20
SO20
+5 V
+5 V
iC-WE
iC-WE
ERROR
ERROR
VCC
VCC
LOW VOLTAGE
GND
LOW VOLTAGE
GND
T.SHUTDOWN
T.SHUTDOWN
4-7,14-17
4-7,14-17
2
2
VB
VB
+24 V
+24 V
12
12
NER
NER
A1
A2
A3
A1
A2
A3
11
13
18
11
13
18
3
3
+24 V
ERROR
LINE 100 m
Rev D1, Page 7/10
PLC