Diablo C920 photobeam doc. S19
C920 specification
Power
12/24V ac/dc (set on jumper)
Range
20m
Dimensions
60 x 52 x 130mm
Light current
108mA@24V
Wavelength
950nm
Modulation
1.33kHz
Relay
1A @ 24Vac SPCO
IP rating
IP66
Angle
-90° to +90°
Connections
Relay contacts are volt free. Relay response time is
suitable for being driven from a Cat.2 switched power
supply. C920 runs from 12V or 24V. Insert the jumper
for 12V operation. When running from a dc supply the
photo-beam is polarity sensitive.
H -- + Com NC NA
Rx
H -- +
12 / 24 ac dc
Tx
Functional description
C920 is a two part vandal resistant photo-beam for industrial
applications. The die cast aluminium shell has a tough
polycarbonate chassis that allows the circuit board to be
mounted at any angle over 180° . The receiver has dual
relays for Cat2 certification. infrared photo-beam working
from 12V or 24V ac/dc.
A LED on the Tx is lit all the time. The Rx LED is on when the
beam is uninterrupted. Both are visible through the case.
Installation
Infrared elements should be 500mm to 600mm from ground
level. Screw the chassis to a flat mounting surface to be sure
the O ring water seal is effective.
There is a protected cable entry point beneath the case and
a rear entry point. Terminals take up to 20 awg wire 0.75mm.
Cables should be sealed into the chassis with a compression
gland or the grommet supplied. It is a good precaution to
spray a conformal coating on the PCB before closing. WD40
also is a good insert repellent.
Forematic
9 Vanalloys Estate
Stoke Row
Henley RG9 5QW www.forematic.com QPS19-C920
Photo-
beam
Rx
NC
NA
C
-
+
Photo-
beam
Tx
+
-
Infrared beam
Photo-
beam
Rx
NC
NA
C
-
+
Photo-
beam
Tx
+
-
Infrared beam
Power
supply
N/C safety
contact
Safety circuit application using
two C920’s. The N/C contacts
are connected in series.
The Tx parts must not be on
the same side of the road.
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