E56ADL40SAE01 - EATON CUTLER HAMMER

IN ORDER TO AVOID ELECTRIC SHOCK OR OTHER POSSIBLE INJURY:

• DO NOT USE THIS PRODUCT FOR HUMAN SAFETY APPLICATIONS.

IT WAS NOT DESIGNED, TESTED OR RECOMMENDED FOR THIS

USE.

• DO NOT USE THIS PRODUCT IN HAZARDOUS LOCATIONS (E.G.

EXPLOSIVE ATMOSPHERES). IT WAS NOT DESIGNED, TESTED OR

RECOMMENDED FOR THIS USE.

• ENSURE THE PRODUCT IS PROPERLY WIRED TO THE CORRECT

POWER SUPLLY FOR THE APPLICATION. REFER TO THE

SPECIFICATIONS AND WIRING DIAGRAMS IN THIS MANUAL.

MODELS COVERED IN THIS MANUAL

E56BAL70UAA01

P51894 Rev 03

Effective: 18 June 2009 Page 1

Installation Instructions

E56 Pancake Style Inductive Proximity Sensor

WARNING

Questions? Call our Sensor Application Engineers at (800) 426-9184.

Note: This installation manual only covers small-diameter

pancake models (with model numbers beginning with

E56A). For the installation manual covering medium- and

large-diameter models, use P51895.

INTRODUCTION

The Cutler-Hammer E56 Pancake Style Inductive Sensor from

Eaton is a top-sensing, solid-state device used to detect metal

targets at range.

The E56 Series is available in three different sizes: small (ø 74

mm), medium (ø 96 mm), and large (ø 152 mm). Connectivity

options include a factory-installed Mini Connector, Micro

Connector or Screw Terminals. The E56 Series meets the

requirements of NEMA Type 4, 4X, 6, 6P, 12 and 13 enclosures.

Each package style is available in either 4-wire DC or 2-wire

AC/DC versions. Additional key features include complementary

outputs (1NO / 1NC) for DC models and two output status LEDs.

The 4-wire DC models also feature Auto-Conﬁ g Outputs, which

automatically set the sensor to the correct output mode (NPN/

sinking or PNP/sourcing) without user intervention.

BASIC OPERATION

Inductive proximity sensors generate a high frequency

oscillating magnetic ﬁ eld in the vicinity of the sensing head.

When a metal object enters this ﬁ eld, it changes the ﬁ eld

loading of the oscillator coil. This change is recognized by a

detector circuit, which then energizes the output.

E56 Series sensors will detect all metals, but primarily steel. The

exact distance at which a target is detected is determined by its

size, thickness and type of metal.

To determine sensing distance with your target, see the Sensing

Field Diagrams on Page 2. These diagrams serve as a reference

point and show where the target will be detected for lateral

(side or slide-by) and axial (head-on) approaches. These curves

must be corrected for smaller-than-standard targets and other

metals. (Standard target sizes are listed Page 2.)

Product Family

E56 E56 Series

Size

A Baseplate: 80 mm

Sensing Head: ø 74 mm

B Baseplate: 110 mm

Sensing Head: ø 96 mm

C Baseplate: 170 mm

Sensing Head: ø 152 mm

Voltage Type

A AC/DC 2-wire

D DC 4-wire

Output Type

L1 N.O. / 1 N.C.

M1 N.O.

N1 N.C.

Sensing Range

40 40 mm

50 50 mm

60 60 mm

70 70 mm

100 100 mm

Shielding

U Unshielded

S Shielded

Output Mode

A Auto-Conﬁ g (NPN/PNP)

N NPN

P PNP

Connection

A01 AC Micro, 3-Pin

B01 AC Mini, 3-Pin

C02 Cable, 2 m

D01 DC Micro, 4-Pin

E01 DC Mini, 4-Pin

Screw Terminals

Note: Not all possible combinations

shown in table are offered as standard.

P51894 Rev 03

Effective: 18 June 2009Page 2 Questions? Call our Sensor Application Engineers at (800) 426-9184.

MOUNTING CONSIDERATIONS

The sensor should be mounted using four 0.25-inch bolts

through the mounting holes provided. Do not support the

sensor by conduit alone. The sensor can be mounted to

any surface without affecting sensor performance, but it is

recommended to use a solid base to ensure reliable operation.

For all unshielded inductive sensors, ensure there is adaquate

distance between the sensor face any adjacent metals. See the

below diagram for isolation distances.

When E56 Series sensors are mounted side-by-side, there

is the possibility of interaction between the magnetic ﬁ elds

of the sensors. This could cause unreliable operation. Follow

the limitations noted in the below illustration when mounting

sensors in the same location.

Sensor Isolation Minimum Distances to Adjacent Metals

Sensor-to-Sensor Isolation Minimum Distances

SENSING

The sensing ﬁ eld for the E56 Series sensor is shown to the

right. In addition to maximum sensing distance, this diagram

also illustrates the performance of the sensor as the target

approaches the sensing face in an axial (head-on) or lateral

(side or side-by-side) manner.

In this diagrams, the sensing distances shown are base rated

on standard target sizes. Sensing range will decrease if a target

is used that is smaller than the standard target size. See the

below table for standard target sizes for each style sensor.

Sensor Model Standard Target Size

Small Diameter

(Both Shielded and Unshielded)

3 x Sensing Range

Detection for laterally approaching targets occurs at the point

where the target ﬁ rst touches the envelope of the sensing curve

depicted below. The curves must be corrected for smaller

targets and other metals. The general correction factors for

metals other than steel are shown below.

Maximum sensing distances are shown in the below diagrams,

but for most reliable lateral operation, keep the sensor-to-

target distance as short as possible. It is recommended that a

lateral traveling target pass at no more than 75 percent of the

maximum sensing distance.

CORRECTION FACTORS FOR METALS

Sensing range is determined by target size, thickness and metal

type. See the below table for correction factors based upon

standard target sizes.

Target Material Corrective Factor

Steel 1020 1.00

Stainless Steel 400 0.90

Stainless Steel 300 0.70

Brass 0.54

Aluminum 0.50

Copper 0.46

SENSING FIELD DIAGRAM

Small Diameter Pancake

9 x Sensing Distance 12 x Sensing Distance

3 x Sensing Distance 3 x Sensing Distance

(0.79)

(1.57)

(0.79)

20 (0.79)

50 (1.97)

Axial

Operate

Point

Lateral 75%

40 (1.57)

Effective: 18 June 2009

P51894 Rev 03

Page 3

Questions? Call our Sensor Application Engineers at (800) 426-9184.

TARGET POSITIONING

To ensure reliable sensing performance, it is recommended to

follow the general guidelines regarding target positioning below.

Axial (Head On) Approach — The target must be

positioned so that a projection of the target on the sensor

face covers at least half of the indicator area. If the target is

smaller than the indicator area, its axis should coincide with

the sensor axis.

Lateral (Side, Slide-By) Approach — Position the target

at a distance no greater than 75 percent of the rated axial

sensing distance from the sensor face.

SHORT CIRCUIT PROTECTION

Built-in short circuit protection prevents damage to the sensor

when the load current exceeds an unsafe level. When this

occurs with the target in the sensing zone, the load current will

be reduced to a level that will not energize the load. Depending

on the magnitude of the excessive load current, the sensor will

manage its retry rate accordingly. The output will continually

retry until the short condition is removed. For 2-wire AC/DC

models, the LED indicator will ﬂ ash green if the short condition

persists, and the cycle will repeat until the load current returns

or is corrected to normal. For DC models, there is no LED

indication of a short condition.

AUTO-CONFIG PNP/NPN OUTPUT DETECTION

Four-wire DC versions of the E56 Series feature Auto-Conﬁ g

outputs. This technology automatically determines how the

sensor’s output circuits have been wired and adjusts the

outputs to either PNP (sourcing) or NPN (sinking) without

any user intervention. The Auto-Conﬁ g process takes place

at sensor power-up. If the output is changed without power

cycling the sensor, the Auto-Conﬁ g process will not start and

therefore the outputs will not change. To ensure your outputs

are correct, always power down the sensor when making a

change to the output conﬁ guration.

Note: If Auto-Conﬁ g detects one output as NPN, then both

outputs will be set to NPN.

WIRING DIAGRAMS

The sensor should be mounted using four #10 bolts through the

mounting holes provided. Do not support the sensor by conduit

alone. The sensor can be mounted to any surface without

affecting sensor performance, but it is recommended to use a

solid base to ensure reliable operation.

Note: For AC/DC models, connected earth ground through

pin one or to connector shell.

DC Micro Connector DC Mini Connector

(Models Ending -D01) (Models Ending -E01)

DC Screw Terminal AC/DC Micro Connector

(Models Ending -A01)

AC/DC Screw Terminal

AC/DC Mini Connector

(Models Ending -B01)

3(-) 4

LOAD

WH N.C.

BK N.O.

Auto-Configure enables load

to be wired to +V or (-)

3(-)

BK N.O.

Auto-Configure enables load

to be wired to +V or (-)

WH N.C.

LOAD

Auto-Configure enables load

to be wired to +V or (-)

BK N.O.

WH N.C.

LOAD

(-)

L2 L1

RD/BK

LOAD

RD/WH

3L1 L2

BK LOAD

N.O./N.C.

Selectable

L1 or +V

L2 or (-)

Not Connected

LOAD

P51894 Rev 03

Effective: 18 June 2009 Page 4

Questions? Call our Sensor Application Engineers at (800) 426-9184.

SPECIFICATIONS

AC/DC 2-Wire DC 4-Wire

Shielded Unshielded Shielded Unshielded

Operating Voltage 20-250V AC

20-60V DC

10-42V DC

Load Current (Max.) 400 mA 300 mA

Burden Current — < 25 mA

Off-State Leakage AC Operation:

At or Above 0°C: <1.7 mA Per Output

Below 0°C: 2.0 mA Per Output

DC Operation:

<1.5 mA

NPN Mode: < 400 µA

PNP Mode: < 1 µA

Voltage Drop < 10V (5V Nominal) < 2.5V

Frequency of Operation 30 Hz 70 Hz

Outputs N.O. or N.C. by Model Complementary (1N.O./1N.C.) with Auto-Conﬁ g

Maximum Sensing Distance 40 mm 50 mm 40 mm 50 mm

Standard Target Size (Mild Steel) 120 x 120 mm 150 x 150 mm 120 x 120 mm 150 x 150 mm

Repeatability < 3%

Hysteresis (Max.) 15%

Time Delay Before Availability 300 msec

Circuit Protection Short Circuit Protection with Auto-Reset

Operating Temperature -40° to +70°C (-40° to + 158°F)

Temperature Drift ±10%

Enclosure Rating NEMA 4, 4X, 6, 6P, 12, 13 (IP67 and IP68)

Approvals CE

Indicator LED Green: Power

Red: Output

APPROXIMATE DIMENSIONS

Model A (Depth) B (Width) C (Depth) D (Height)

Mounting

EFG (ø)

Micro Connector

(Models Ending -A01 or -D01)

(3.13)

110

(4.32)

(1.54)

(2.56)

(0.21)

Mini Connector

(Models Ending -B01 or -E01)

(3.13)

119

(4.67)

(1.54)

(2.56)

(0.21)

Screw Terminals

(Ending in -A, -N, or -P)

(3.13)

(3.87)

(1.54)

(2.56)

(0.21)