Omron E8M - User manual



Pressure Sensor E8M

Four-channel Pressure Sensor

Offers Versatile Functions and High

Precision without Errors

The industry’s smallest pressure sensor,

compact, lightweight – ideal for robot

arms or other moving components

A highly sensitive minute-pressure

sensor model detects very small

differences in air pressure

Requires no wiring conduit – can be

located for sensing in small places

Simple display panel efficiently saves

space, but offers large LEDs

Easy sensitivity adjustment using the

teach function and channel-to-channel

copy function

Ordering Information

SENSOR

Type Pressure range description Part number

Minute differential pressure sensor Differential pressure from 0 to 0.145 psi

(0 to 1,000 Pa) between positive and

negative ports

E8M-A1

Positive pressure sensor 0 to 145 psi (0 to 1 MPa) E8M-10

Negative pressure sensor 0 to –14.6 psi (0 to –101 kPa) E8M-N0

CONTROLLER

Item Description Part number

Controller Optional for pressure sensors:

E8M-A1, E8M–10 and E8M-NO K3C-MP8-T1Z

E8M

CONNECTOR CABLES (ORDER SEPARATELY)

Item Description Part number

Sensor connector cable 4-pin connector with 3-m cable

required

for E8M-10 and E8M-NO

(Note: E8M-A1 does not require this cable.)

E89-M3

Replacement cable Connector for the E89-M3

Sensor Connector Cable.

(Note:This connector is provided with the E89-M3

cable. As a replacement connector, it can be

purchased separately.)

XS8A-0442

Connector cable for K3C Controller 7-pin connector with 2-m cable

(

required

for K3C Controller) K32-MP2W

Specifications

RATINGS

Sensor

Item E8M-A1 E8M-10 E8M-N0

Supply voltage 12 VDC±10%

Current consumption 30 mA max.

Pressure type Differential pressure Gauge pressure

Applicable fluid Non-corrosive gas and non-flammable gas

Rated pressure range Differential pressure from

0 to 0.145 psi (0 to 1,000 Pa)

between positive and negative ports

0 to 145 psi (0 to 1 MPa) 0 to –14.6 psi

(0 to –101 kPa)

Withstand pressure Differential pressure from

0 to 0.36 psi (0 to 2,500 Pa)

between positive and negative ports

0 to 217.5 psi (1.5 MPa) 58 psi (400 kPa)

Accuracy ±3% FS max. ±5% FS max.

Linearity ±1% FS max.

Hysteresis ±1% FS max.

Output (linear output) Voltage output: 1 to 5 V with an output impedance of 1 kΩ

Protection circuit Reverse polarity connection, load short-circuiting

Ambient temperature Operating 0°C to 40°C (32°F to 104°F) with no icing

Storage –15°C to 50°C (5°F to 122°F) with no icing

Ambient humidity 35 to 85% (with no icing)

Pressure joint M5 female screw R (PT) 1/8 and M5 female

screw M5 male screw

E8M E8M

Controller

Item K3C-MP8-T1Z

Connectable pressure sensor E8M-A1

(differential pressure from

0 to 1,000 Pa between positive and

negative ports)

E8M-10

0 to 145 psi

(0 to 1 MPa)

E8M-N0

0 to -14.6 psi

(0 to –101 kPa)

E8CB-01C

0 to 14.2 psi

(0 to 98 kPa)

Supply voltage 24 VDC ±10%, ripple (p-p) 10% max.

Current consumption 200 mA max.

Sensor power supply 30 mA max. for 4 channels at 12 VDC±10%

Input Sensor input (through 4-pin

one-touch connector) Input voltage range: 1 to 5 VDC with an impedance of 1 MΩper channel

Output Comparative output

(2 outputs on channel 1 and a

single output each

on channels 2 to 4 through 7-pin

one-touch connector)

NPN open collector

Flow current: 30 mA max.

Applied voltage: 30 VDC max.

Residual voltage: 0.8 V max. with a flow current of 30 mA

0.4 V max. with a flow current of 16 mA

NO or NC (selectable) independent output in hysteresis or wind comparator mode

(selectable) on each channel

Indicators Measurement value LED indicator with a character height of 10.8 mm for 31/2digits for a single channel

selected

Message LED indicator with a character height of 10.8 mm for 31/2digits

Measurement and

setting channel LED indicator with a character height of 7.2 mm for 1 digit

Comparative output LED indicator (4 LED indicators for Output 1 and 1 LED indicator for Output 2 that are

lit when the output transistor is turned on)

Others LED indicator for connecting channel and unit display

Protection circuit Reverse polarity connection, load short-circuiting

Ambient temperature Operating 0°C to 50°C (32°F to 122°F) with no icing

Storage –10°C to 60°C (14°F to 140°F) with no icing

Ambient humidity 35 to 85% RH (with no icing)

Dimensions 48 x 48 x 63.7 mm; or: 1.89 x 1.89 x 2.51 inches (W x H x D) for panel mounting without

connectors

E8M

CHARACTERISTICS

Sensor

Item E8M-A1 E8M-10 E8M-N0

Voltage influence ±3% FS max.

Temperature influence ±0.25% FS/°C max. ±0.12% FS/°C max.

Insulation resistance 100 MΩmin. at 500 VDC between current-carrying parts and case

Dielectric strength 1,000 VAC, 1 min

Vibration resistance 10 to 150 Hz, 0.75-mm single amplitude or 100 m/s2(approx. 10G) for 8 min for 4 times

each in X, Y, and Z directions

Shock resistance 300 m/s2(approx. 30G) for 3 times each in X, Y, and Z directions.

Enclosure rating IP50, IEC529

Material Pressure joint SUS303 SUS304

Case ABS Aluminum, resin

Cable 4-mm (0.16 inch) dia.,

4-conductor, vinyl-insulated

cord, standard length: 3 m

(9.84 ft)

(See Note.)

Weight Approx. 130 g (4.58 oz) Approx. 30 g (1.06 oz) Approx. 20 g (0.71 oz)

Note: Use the E89-M3, which is sold separately.

Controller

Item K3C-MP8-T1Z

Response speed 5 ms max. (with 4 channels used)

Set resolution ±0.1% FS max.

Display precision ±1% FS max.

Supply voltage influence ±1% FS max.

Temperature influence ±1% FS max.

Enclosure rating IP40 (IEC529)

Dielectric strength 1,000 VAC 1 min.

Insulation resistance 100 MΩmin. (500 VDC) between current-carrying parts and case

Vibration resistance 10 to 150 Hz, 0.75-mm single amplitude or 100 m/s2(approx. 10G) for 8 min for 4 times

each in X, Y, and Z directions

Shock resistance 300 m/s2(approx. 30G) for 3 times each in X, Y, and Z directions

Connecting method Power supply and output: 7-pin terminal. Sensor I/O: 4-pin connector

Weight Approx. 90 g (3.17 oz)

E8M E8M

ineerin

Data

LINEAR OUTPUT VOLTAGE VS. PRESSURE (TYPICAL)

Linear output voltage (V)

Differential pressure (Pa) between

positive and negative ports

E8M-A1 E8M-10

Linear output voltage (V)

Pressure (kPa)

E8M-N0

Linear output voltage (V)

Pressure (kPa)

OUTPUT LINEARITY (TYPICAL)

Linearity deviation

Differential pressure (Pa) between

positive and negative ports

E8M-10

Linearity deviation

Pressure (kPa)

E8M-A1

Linearity deviation

Pressure (kPa)

E8M-N0

E8M

LINEAR OUTPUT FLUCTUATION VS.

POWER (TYPICAL)

E8M-A1 E8M-10

Linear output fluctuation (% FS)

Voltage (V) Voltage (V)

Linear output fluctuation (% FS)

Pressure 0

Rated pressure

Pressure 0

Rated pressure

E8M-N0

Voltage (V)

Linear output fluctuation (% FS)

Pressure 0

Rated pressure

LINEAR OUTPUT FLUCTUATION VS.

TEMPERATURE (TYPICAL)

E8M-A1

Linear output fluctuation (% FS)

Temperature (°C)

Pressure 0

Rated pressure

E8M-10

Temperature (°C)

Linear output fluctuation (% FS)

Pressure 0

Rated pressure

E8M-N0

Temperature (°C)

Linear output fluctuation (% FS)

Pressure 0

Rated pressure

E8M E8M

Nomenclature

PRESSURE SENSOR CONTROLLER

13121110

K3C Controller

Display Panel

1. Numeric and Menu Display (Main Display)

Indicates measured values and menu settings.

2. Unit Indicator

Indicates the currently set unit used for sensing.

3. Sensor Indicator

Indicates the operation of Sensors connected to the K3C.

When the Sensors are in operation, corresponding indicators

are lit.

Sensors can be connected to channels 1 to 4. Channel 1 has

two outputs.

4. OUT1 Indicator

Lit when OUT1 is turned ON.

5. OUT2 Indicator

Lit when OUT2 is turned ON. Only channel 1 has OUT2.

6. ON-point Indicator

The ON-point value presently set is displayed in the main

display when the ON-point indicator is lit. (See

Output Con-

trol,

page 10.

)

7. Channel Display

Displays the channel of a Sensor to be in operation or where

data is being set. Channels 1 through 4 are available.

8. OFF-point Indicator)

The OFF-point value presently set is displayed in the main

display when the OFF-point indicator is lit. (See

Output Con-

trol,

page 10.)

Operation Keys

9. CH

Used to select the channel of a Sensor to be in operation or

where menu items are set. A channel is selected in sequence

1 to 4 by repeatedly pressing the CH Key.

10. RST/ESC

Used to return to the previous menu. If the RST/ESC Key is

pressed right after a set value change, the new set value will

be canceled, and the display will return to the previous menu.

The Controller will be zero-reset, if the RST/ESC Key is

pressed for 1 s minimum.

11. TEACH

Used for teaching settings.

12. MENU

Used to select the measurement mode or set mode, to

change menu items in set mode, and to enter set values.

13. DISPLAY

Used to select the measurement value, ON-point, or OFF-

point display in measurement mode.

Set menu or set value display is selected in set mode.

14. UP/Down

Used to change the set values in set mode: The values in-

crease by pressing the Up ( ) Key and decrease by

pressing the Down ( ) Key.

E8M

peration

OUTPUT CIRCUITS

Sensor

E8M-A1 E8M-10,

E8M-N0

Pressure

Sensor

main

circuit

Power

indicator

(green)

Brown

Pink

Black (linear output)

Load

Blue

Pressure

Sensor

main

circuit

Power

indicator

(green)

Brown

Pink

Black (linear output)

Load

Blue

Connector

+ V

0/5 V

0 V

Input

+ V

0/5 V

0 V

Input

Controller

Pressure

Controller

main

circuit

Connector

+ V

0 V

Note: The above colors indicate the conductor colors of the

K32-MP2W (power and output connector for K3C

Controller).

(brown)

(pink)

(orange)

(gray)

(white)

(black)

(blue)

E8M E8M

DISPLAYS OF SETTINGS AND MEASUREMENTS

Digital Display

The E8M displays alphanumeric characters, such as

measurement values and menu items, with 7-segment LEDs as

shown below:

Display Meaning

set ON-point and OFF-point Settings

kpa Unit (kPa)

wid Width

aUe Average

The following abbreviations are used for the digital display of the

Controller.

Abbreviation Meaning

SET Setting

UNT Unit

OPE Operation

SEN Sensor

PRT Protect

COP Copy

HYS Hysteresis

WID Width

AUT Auto

DSP Display

AVE Average

MODES

In addition to the measurement value display function, the K3C Controller has a variety of functions, including an external device control

function. These functions are available in four main modes, as described below. Characters in parentheses indicate the digital display

conditions. For the relationship among each mode and for switching methods, refer to the following figure.

Power on Measurement

mode

Basic setting

mode

Special

setting mode

Teaching

mode

1 s min.

E8M

Measurement Mode

The K3C is in this mode when power is turned on. Normally, you will use the Controller in this mode.

Basic Setting Mode

ON-point or OFF-point value

settings and change

Measurement unit selection

Output type selection:

Normally open or normally

closed

Sensor type selection

Teaching Mode

Values can be set automatically using measurement values instead of key input.

Special Setting Mode

Key-protect function for

set value protection

Data copy function to copy

the data of channels

Original pressure

fluctuation compensation

setting

Hysteresis width

Window width setting

Measurement value

display refresh interval

setting

Number of measurement

times setting for

measurement value

averaging

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