PHOTOSWITCHR Photoelectric Sensors
1–129
Description
The
42BC photoelectric sensor of
fers
high performance background
suppression performance at sensing
ranges up to 2m (6.6ft). This type of
sensing capability is desirable in
applications where standard transmitted
beam or retroreflective sensing is not
practical due to no easy access to both
sides of the target or when economics
is a major factor
.
The 42BC photoelectric sensor uses a
triangulation method to mechanically
adjust the sensing angle, thereby,
ensuring reliable detection of the target
while ignoring the background. Using
the sensitivity adjustment on the top
cover, the desired sensing range can
be dialed in to meet the specific
application.
The 42BC is available in either a 1m
(3.3ft) or 2m (6.6ft) sensing range. For
applications where the sensing
distances are much shorter use of the
RightSight background suppression
sensor is recommended. These
sensors of
fer a fixed 50mm (2in) and
100mm (4in) sensing range. Similar
long range sensing distances may be
solved with the 42BT photoelectric
sensor also. This sensor provides a
smaller package style for space critical
installations.
General Specifications
Features
•Long range background suppression
diffuse sensing mode
•Adjustable range settings
•
Slim housing style
•
Highly visible LED Indicators
•
Screw terminal connections
•
Both NPN and PNP outputs (DC)
•
SPST relay output (AC)
•
Short-circuit protected outputs
General Information
Wiring
Diagrams
page 1–130.
. . . . . . . .
Dimensions page 1–130
. . . . . . . . . . . . .
Sensing Modes
Background Suppression page 1–131.
Accessories
Quick-Disconnect Cables page 5–1
. . .
Mounting Assemblies page 1–301
. . . .
Replacement Cover page 1–305
. . . . . .
42BC
Long Range Background Suppression
Unit Protection
Supply voltage
Current Consumption
Output Type
Output Mode
Output Rating
Response Time
Housing Material
Lens Material
LED Indicators
Connection Types
Supplied Accessories
Optional Accessories
Operating Environment
Vibration
Shock
Operating Temperature
Relative Humidity
Approvals
Output short circuit (SS version only), reverse polarity, false pulse,
transient noise
12–24V DC
30mA maximum
NPN and PNP (DC version)
SPST N.O. relay (AC version)
Light/dark operate selectable
100mA@24V DC
3A@240V AC
20ms maximum (DC version)
30ms maximum (AC version)
Polycarbonate
Acrylic
See User Interface on page 1–130
Screw terminal, 16 AWG (1.3mm2)
Right angle mounting bracket
Cordsets, mounting brackets—see Section 5
NEMA 1, 12, 13 IP65 (IEC529)
10–55Hz, 1mm amplitude, Meets or exceeds IEC 60947–5–2
30g with 1ms pulse duration, Meets or exceeds IEC 60947–5–2
–25_C to +55_C (–13_F to +131_F)
5…85%
UL listed, CSA certified, and CE marked for all applicable directives
PHOTOSWITCHR Photoelectric Sensors
1–130
User Interface Panel
Label Color State Status Output Indicator
Light Operate/Dark
O
p
er te
S
witch
M rgin
Green
OFF 0.8>margin>1.2
O
u
t
u
t
Indic
a
tor
Operate Switch
r
Margin Green
ON 0.8<margin<1.2
Far
Ot
p
t
Red
OFF Output not activated
N
ear
Output Red
ON Output activated
S
tability Indicator
N
e
St
a
bilit
y
I
n
di
ca
t
or
Range Adjustment
Wiring Diagrams
Relay
Output T
ype
Solid State Output T
ype
Terminal
V
ersion
2
1
4
3
24
V–240V AC/DC
Output 24–250V
AC/DC 3A Max
T
erminal No.
2
1
4
3
+12V–24V DC
PNP Output
T
erminal No.
–DC
NPN Output
Note: Details
r
egardin
g c
onnectio
n o
f A
llen-Bradle
y B
ulleti
n 4
2B
C p
hotoelectric sensor
s t
o A
llen-Bradle
y P
rogrammabl
e C
ontrollers
ca
n be f
oun
d i
n p
ublicatio
n 4
2-2.0.
Dimensions—mm (inches)
2–Dia.
5.2 (0.204)
2 Places
69
(2.716)
26
(1.023)
68
(2.677)
50 (1.968)
12
(0.472)
68 (2.677)
23.5 (0.925)
5.5 (0.216)
17
(0.669)
Removable, see-through
snap on wiring Cover
Lens
1
1.5 (0.45)
35
(1.378)
Optical
Axis
Detection
Direction
Due to the detection method, the
sensor must be positioned such that the
target passes in the direction illustrated.
Target
Motion in up/down direction cannot be
detected.
Minimum Sensing Distances
Near Setting
2.5% black
8cm (3.15in) at 2X margin
100% white
3cm (1.18in) at 2X margin
Far Setting
2.5% black
20cm (7.9in) at 2X margin
100% white
4cm (1.57in) at 2X margin
42BC
Long Range Background Suppression
PHOTOSWITCHR Photoelectric Sensors
1–131
Object
to be
Sensed
Background
Specifications
Field of View 3.5_
Minimum Sensing
Distance 30mm (1.2in)
Emitter LED Infrared 880nm
QD Cordsets and Accessories
DC Micro QD Cordset,
Straight, 4-pin, 2m 889D–F4AC–2
AC Micro QD Cordset,
Straight, 4-pin, 2m 889R–F4AEA–2
Pico QD Cordset,
Straight, 4-pin, 2m 889P–F4AB–2
Other Cordsets Available 5–1, 5–44, 5–52
Mounting Assemblies 1–301
Typical Response Curves
1m Background Suppression
1
10
100
Operating
Distance
Operating Margin
0 0.1m
(0.3ft)
1m
(3.2ft)
Beam Patterns
–3
–2
–1
0
1
2
3
0 0.2m
(0.67ft)
0.4m
(1.31ft)
0.6m
(1.97ft)
0.8m
(2.63ft)
1m
(3.28ft)
Operating
Distance
Beam Diameter—cm
2m Background Suppression
Operating
Distance
Operating Margin
1
10
100
0.1m
(0.3ft)
1m
(3.2ft)
10m
(32.8ft
)
–8
–6
–4
–2
0
2
4
6
8
0 0.4m
(1.31ft)
0.8m
(2.63ft)
1.2m
(3.94ft)
1.6m
(5.25ft)
2m
(6.56ft)
Operating Distance
Beam Diameter—cm
Selection Guide
Operating
V
oltage
Supply Current
Sensing
Distance
Output
Energized
Output Type
Capacity
Response Time
Max
Leakage
Current
Connection
Type
Catalog Number
12–24V DC ±10%
1m (3.3ft) NPN/PNP
Selectable
0 5mA
42BC–B1LBAL–T4
12 24V
DC
±10%
30mA 2m (6.6ft)
Li
g
ht/Dark
electable
100mA
20ms
0.5mA Screw terminals
accepts up to
42BC–B1LBAN–T4
24–240V AC/DC ±10%
30mA (DC)
1m (3.3ft)
Light/Dark
Selectable S.P.S.T. N.O. Relay
3A
(
250V AC, 750VA
)
2
16A
W
(1.3mm sq.)
conductors
42BC–B1CRAL–T4
30mA
(
D
C)
15mA (AC) 2m (6.6ft)
3
(250V
C
,
750V )
3A (30V DC, 90W)
30ms
—
u
42BC–B1CRAN–T4
42BC
Long Range Background Suppression