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

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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

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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

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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)

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En
g
ineerin
g
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

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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

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Nomenclature
PRESSURE SENSOR CONTROLLER
1
2
3
4
5
14
13121110
6
7
8
9
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.

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O
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)

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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.

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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