Rockwell Automation 42CS User Manual

Installation Instructions

Bulletin 42CS Stainless Steel Photoelectric Sensors

SAVE THESE INSTRUCTIONS FOR FUTURE USE.

Refer to the product catalog pages for additional information.

Description

The 42CS family of sensors offers a wide range of sensing modes in a smooth 316L stainless steel housing, designed for food, beverage and pharmaceutical applications.

The ferromagnetic teach feature makes the sensor easy to program by simply placing a ferromagnetic metal object on a section of the sensors housing to initiate the teach process. The smooth and clean design minimizes the collection and accumulation of undesired particles and allows for a fast cleanup.

Features

S Patented ferromagnetic teach for easy sensor

programming

S Extended temperature operating range

S Clean design minimizes the accumulation of undesired

particles allowing for a fast and easy cleanup

S 18 mm stainless steel 316L enclosure with laser etched

markings

S Two teach modes: standard and precision

S Complementary light and dark operate outputs

S Teach lockout feature prevents unauthorized users from

changing the settings

S Clear object detection models available

S Input to disable light source on transmitted beam emitter

S IP69K, ECOLAB and Johnson Diversey rated

Sensor Indicators

LED Status

OFF Teach function is locked

Green

Yellow

 Pin 4 of Micro (M12) QD. L.O for diffuse, background suppression. D.O for polarized

retroreflective and transmitted beam

ON Teach function is enabled

Flashing (8 Hz) Short Circuit

OFF

Flashing (3 Hz)

Output de-energized 

Output energized 

Output energized (Margin < 2) 

Specifications

Certifications cULus and CE marked for all applicable directives

Environmental

Operating Environment IP69K, ECOLAB and Johnson Diversey rated

Operating Temperature [C (F)]

Vibration 10…55Hz, 1 mm amplitude; meets or exceeds IEC

Shock 30 g with 1 ms pulse duration, meets or exceeds IEC

Relative Humidity 5…95% (noncondensing)

Ambient Light Immunity 5000 Lux (Incandescent light) and 100000 Lux

Optical

Sensing Modes

Standard Diffuse

Background Suppression

Polarized Retroreflective 4 m (13.12 ft) Visible Red

Clear Object Detection 1 m (3.2 ft) Visible red

Transmitted Beam 20 m (65.62 ft) Infrared

Electrical

Voltage 10…30V DC

Current Consumption 35 mA max

Sensor Protection Short circuit, transient noise, reverse polarity

Outputs

Response Time 1 ms (diffuse, polarized retroreflectived, clear object),

Output Type PNP or NPN by cat. no.

Output Mode Complementary light and dark operate

Output Current 100 mA

Output Leakage Current 10 µAmax.

Mechanical

Housing Material Stainless steel 316L

Lens Material PMMA

Connector Material Grilamid

Connection Types 4-pin DC micro (M12) QD

Supplied Accessories Stainless steel teach rod, mounting nuts (threaded

-- 2 5 …+85° (--13…185°)

60947--5--2

(Sunlight)

Sensing

Range

100 mm

(3.94 in.)

400 mm

(15.75 in.)

800 mm

(31.5 in. )

60…100 mm

(2.36…3.94 in.)

1.25 ms (background suppression), 2 ms (transmitted beam)

models only)

Light Source

Visible Red

(660 nm)

Infrared

(880 nm)

Infrared

(880 nm)

Visible Red

(660 nm)

(880 nm)

Spot Size @

max. distance

10 mm @

100 mm

50 mm @

400 mm

120 mm @ 1 m

12 mm @

120 mm

100 mm @

3 mm

50mm@1m

600 mm @

20 m

Background Suppression Sensors

Target

Application Note

Due to the detection method, targets traveling horizontal to the sensor’s optics are detected. Targets traveling vertically may not be accurately detected. For reliable background suppression, a minimum separation distance of 6 mm is recommended between the target and the background.

Sensor Alignment

1. Pan the sensor left, right, up, and down to center the beam on the sensed object (for diffuse), reflector (for polarized retroreflective) or transmitter (for transmitted beam).

2. Fix the sensor position when the green LED is ON (flashing) and the yellow output LED is ON (light sensed and L.O. output energized). This set up assures a good margin and that the signal received is greater than twice the signal required to energize the L.O. output. The yellow LED is on when the L.O. output is conducting.

Mounting the Sensor

Installing sensors on equipment running

IMPORTANT

Securely mount the sensor on a firm, stable surface or support. A mounting which is subject to excessive vibration or shock may cause intermittent operation. Mounting brackets are available for a various installations. See accessories section for an example.

above the indicated vibration and shock specification may cause intermittent operation.

Sensitivity Adjustment Modes

Two types of sensitivity adjustment modes are possible on the 42CS diffuse and polarized retroreflective: Standard Teach and Precision Teach.

The Standard Teach is recommended for general purpose detection of opaque targets, large objects or the absence of a background that could interfere with the teach process. For this teach process, the threshold levels are set at 50% of the detected signal.

The Precision Teach is suited for the detection of small targets or semi transparent objects, where a smaller variation in gain needs to be sensed. For this teach process, the threshold levels are set at below the hysteresis levels of the detected signal.

Diffuse, Polarized Retroreflective and Clear Object

To teach the 42CS using the Standard Teach mode:

1. Place the target within the sensing range.

2. Enter teach mode by placing a ferromagnetic metal object in the notch until the green LED flashes once. Note that the green LED flashes while the teach process is active.

3. When the teach process is complete the green LED turns solid ON. The yellow LED also turns solid ON when the target is detected with at least twice the minimum amount of light needed (Margin >= 2) for standard operation. A flashing yellow LED indicates that the sensor operates with a margin below the recommended 2X (1 < Margin < 2).

4. The sensor is now ready to operate (yellow LED is on when the target is present)

To teach the 42CS using the Precision Teach mode:

1. Place the target within the sensing range.

2. Enter teach mode by placing a ferromagnetic metal object in the notch until the green starts flashing. Note that the green LED blinks multiple times while the teach process is active.

4. The sensor is now ready to operate (yellow LED is on when the target is present).

Background Suppression

To teach the 42CS background suppression:

1 Place the target within the sensing range.

2 Enter teach mode by placing a ferromagnetic object in the

notch until the green LED starts flashing. Note that the green LED blinks multiple times while the teach process is active.

3 When the teach process is complete the green LED turns

solid ON. The yellow LED also turns solid ON when the target is detected.

4 The sensor is now ready to operate (yellow LED is on

when the target is present).

Teach Lock/Unlock

The 42CS teach is used to prevent unauthorized users from changing teach settings and avoid interference from any metal objects that could be in proximity of the teach notch while in operation.

To lock the sensor:

Place a ferromagnetic metal object in the notch until the green LED turns OFF. The sensor is now locked.

To unlock the sensor:

Place a ferromagnetic metal object in the notch until the green LED turns ON. The sensor is now unlocked.

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