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optoNCDT ILR2250
Installation and Assembly | Electrical Connections ILR2250-100
5.4.5
RS422 (with IF2001/USB Converter)
The RS422 interface can be used for configuration as well as for permanent data transmission, even over longer dis-
tances. It is interference-resistant and suitable for industrial applications. Distances of up to 1200 m are possible with a
twisted-pair cable.
For the connection between sensor and PC, the lines must be crossed.
i
Only disconnect or connect the sub-D connection between the RS422 and USB converter when no voltage is flow-
ing.
Characteristics
-
Maximum input voltage RX+, RX- : ±14 V
max
internally terminated with 120 Ohm.
-
Output voltage TX: ±2 V, differential at 2 x 50 Ohm
Parameter
-
Baud rate 115200 baud
-
Start/stop bit: 1
-
Data bits: 8
-
Handshake: No
-
Parity: None
-
Command protocol: ASCII
i
The RS422 interface is widely used in industrial applications.
Use a suitable USB converter, e.g. the IF2001/USB,
, if your PC/Notebook only has USB ports.
Sensor
Terminal, PLC,
IF2001/USB Converter
from MICRO-EPSILON
Symmetrical differen-
tial signals accord-
ing to EIA-422, not
electrically separated
from the voltage
supply.
Use a shielded cable
with twisted wires,
e.g. PC1100-x.
Pin
Cable color
(Cable: PC1100-x)
Function Function
A
White
Rx+
Tx+
B
Brown
Rx-
Tx-
E
Gray
Tx-
Rx-
F
Pink
Tx+
Rx+
J
Purple
GND
GND
Fig. 13 Crossed data lines on receive and transmit side
5.4.6
Trigger Input
The trigger input allows you to trigger a distance measurement using an external signal in the form of a voltage pulse.
PC1100-x
C
red/blue
L
Type 1
ILR2250
Type 2
Type 3
green
GND
+
U
B
+
U
B
47k
Trigger pulse: > 2 ms
High approx. 2/3 * +
U
B
Low approx. 1/3 * +
U
B
Internal pull-down resistor, an open input is detected
as Low.
Connect the input to +
U
B
in order to trigger the
function.
Fig. 14 Basic circuit for triggering
Configure the desired triggering behavior
-
with the sensorTOOL program
-
or using ASCII commands (e.g.
TRIGGER
and
TRIGGERLEVEL
),
.
The number of measured values received can be specified on the ILR2250 after a trigger pulse.
You can start level triggering with
-
+
U
B
at the trigger input for H-level triggering
-
0 V at the trigger input for L-level triggering
