Omron E8Y - User Manual

"Cube" Type Differential Pressure
Sensor with LED Display Offers High
Precision Sensing
■ 31 (1.22) x 30 (1.18) x 30 (1.18) mm
compact-cube style saves mounting
space
■ Easy-to-read red LEDs
■ Digital and analog output available
■ UL and CE approved
■ Flow sensing type available
■ PNP output types and PSI or inch/H2O
types are available on special request
Ordering Information
Differential Pressure Sensor E8Y
■ SENSOR
Type Pressure range Digital output Analog output Port/Mounting Part number
— 4.5 mm dia. pipe E8Y-A2C
Rc(PT) 1/8 E8Y-A2C-R
4.5 mm dia. pipe E8Y-A5C
Rc(PT) 1/8 E8Y-A5C-R
4 to 20 mA 4.5 mm dia. pipe E8Y-A2Y
Rc(PT) 1/8 E8Y-A2Y-R
4.5 mm dia. pipe E8Y-A5Y
Rc(PT) 1/8 E8Y-A5Y-R
Flow sensor — Rc(PT) 1/8, vertical E8Y-A5C-F03V
Rc(PT) 1/8, horizontal E8Y-A5C-F03H
Rc(PT) 1/8, vertical E8Y-A5C-F20V
Rc(PT) 1/8, horizontal E8Y-A5C-F20H
■ ACCESSORIES
Description Part number
Panel-mounting bracket E89-Y1
Miniature
differential
pressure
sensor
0 to 2.0 kPa
(0 to 0.29 psi)
0 to 5.0 kPa
(0 to 0.73 psi)
0 to 2.0 kPa
(0 to 0.29 psi)
0 to 5.0 kPa
(0 to 0.73 psi)
0.3 to 3.0 liter/min.
(0.07 to 0.68 gal/min.)
2.0 to 20 liter/min.
(0.45 to 4.54 gal/min.)
NPN open
collector
(2 independent
outputs)

Summary

Differential Pressure Sensor

Product Overview and Features

Describes the compact-cube style sensor, red LEDs, digital/analog outputs, UL/CE approval, and flow sensing types.

Ordering Information

Details product types, pressure ranges, digital/analog outputs, ports, and part numbers for sensors.

Accessories

Lists available accessories such as panel-mounting brackets with their part numbers.

Specifications and Ratings

Ratings and Characteristics

Provides detailed technical specifications for sensor types, power, pressure, accuracy, and environmental conditions.

Application Examples

Use Cases

Illustrates applications for filter clogging detection, exhaust fan rotation, and air flow control.

Nomenclature and Display

Pressure Sensor Nomenclature

Identifies key components of the E8Y pressure sensor, including display and operation keys.

Operation Keys

Explains the function of ADJ, MODE, and UP/DOWN keys for measurement and setting modes.

Operation Functions

Pressure Units Switching

Allows switching between mmH2O and kPa units for pressure measurement.

Comparative Output Modes

Details Hysteresis and Window modes for ON/OFF outputs, including normal open/close configurations.

Auto-teaching Function

Explains 2-point auto-teaching for setting ON/OFF points with hysteresis based on actual objects.

Advanced Functions

1-Point Auto-teaching

Describes 1-point auto-teaching for setting ON/OFF points in window mode using a reference point.

Key-protect and Speed Control

Covers set value lock function and adjustable display speed for measured pressure values.

Error Display Codes

Lists and explains error codes for zeroing, teaching, short-circuit, abnormal pressure/flow, and input errors.

Dimensions and Mounting

Pressure Sensor Dimensions

Provides detailed dimensions for standard and die-cast port pressure sensor types.

Flow Sensor Dimensions

Shows dimensions for vertical and horizontal mounting types of flow sensors.

Accessories and Precautions

Mounting Brackets

Details dimensions for Mounting Brackets A and B, and the Panel Mounting Bracket E89-Y1.

Panel Cutout Dimensions

Specifies panel cutout dimensions for the E89-Y1 Panel Mounting Bracket.

Environmental Precautions

Advises against using the product in hazardous environments, with incorrect voltage, or exposure to water.

Correct Use Guidelines

Instructs on proper usage, pressure port connection, cable handling, filtering, and output lead management.

Overview

1. Function Description
2. Important Technical Specifications
3. Usage Features
4. Maintenance Features
5. Precautions for Correct Use

The Omron E8Y is a "Cube" type differential pressure sensor with an LED display, designed for high-precision sensing in various applications. Its compact-cube style, measuring 31 (1.22) x 30 (1.18) x 30 (1.18) mm, saves mounting space, making it suitable for installations where space is a premium. The sensor features easy-to-read red LEDs for clear indication of measured values and settings. It offers both digital and analog output options, enhancing its versatility for integration into different control systems. The device is UL and CE approved, ensuring compliance with safety and quality standards. Flow sensing types are also available, catering to specific application needs. For specialized requirements, PNP output types and PSI or inch/H2O measurement units are available upon special request.

Function Description:

The E8Y sensor measures differential pressure and, in its flow sensor variant, measures flow rates. It provides two independent NPN open collector digital outputs (NO/NC) and an analog output of 4 to 20 mA. The digital outputs can be configured in either hysteresis mode or window mode, automatically determined by the ON and OFF point set values. In hysteresis mode, if the ON point set value is greater than the OFF point set value, it operates as normal open; if the ON point set value is less than the OFF point set value, it operates as normal close. In window mode, if the ON point set value is less than the OFF point set value, it operates as normal open; if the ON point set value is greater than the OFF point set value, it operates as normal close.

The sensor includes an auto-teaching function, allowing for easy setup of ON and OFF points without manual key inputs. This function supports both 1-point auto-teaching (window mode) and 2-point auto-teaching (hysteresis mode). In 2-point auto-teaching, the ON and OFF points are automatically set by designating a point with no object (TEACH 1) and a point with an object (TEACH 2), with the hysteresis being a set value. In 1-point auto-teaching, the ON and OFF points are set at the reference point ± window width.

The E8Y features a 3-digit red LED display for numerical values and menu indications, along with orange LED indicators for OUT 1 and OUT 2, which light up when the respective output is on in measurement mode or flash in setting mode. A "Unit" indicator shows the currently used measuring unit (mmH2O or kPa for pressure sensors, L/min or gal/min for flow sensors).

Operation keys include:

• ADJ: Adjusts the Zero Point in measurement mode and shifts to measurement mode in setting mode.
• MODE: Selects the current number setting or menu option.
• UP/DOWN: Displays ON/OFF points of OUT 1 (DOWN key) or OUT 2 (UP key) in measurement mode, and increases/decreases numeric values or scrolls through menu options in setting mode.

Important Technical Specifications:

• Sensor Type: Pressure sensor or Flow sensor.
• Power Supply Voltage: 12 to 24 VDC ±10%, ripple (p-p) 10% max.
• Current Consumption: 50 mA max. for pressure sensors, 75 mA max. for flow sensors.
• Pressure Type: Differential pressure.
• Rated Pressure/Volume Range:
  • Miniature Differential Pressure Sensor: 0 to 2.0 kPa (0 to 0.29 psi) or 0 to 5.0 kPa (0 to 0.73 psi).
  • Flow Sensor: 0.3 to 3.0 L/min. (0.068 to 0.68 gal/min.) or 2.0 to 20.0 L/min. (0.45 to 4.54 gal/min.).
• Withstand Pressure/Volume: 50 kPa (7.25 psi) for pressure sensors, 5 L/min (1.14 gal) or 40 L/min (9.08 gal) for flow sensors.
• Applicable Fluid: Non-corrosive gas and non-flammable gas.
• Accuracy: ±3% FS max.
• Linearity: ±1% FS max.
• Response Time (digital output): ±0.5 sec max.
• Linear Output: 4 to 20 mA ±1%FS with a permissible resistive load of 250 Ω.
• Digital Output: NPN open collector (NO/NC), 2 independent outputs.
  • Load current: 100 mA max.
  • Applied voltage: 30 VDC max.
  • Residual voltage: 1 V max. (load current of 100 mA) or 0.4 V max. (load current of 16 mA).
• Display Accuracy: ±1% FS (pressure sensors), ±3% FS (flow sensors).
• Circuit Protection: Reverse polarity connection, load short-circuiting.
• Ambient Temperature: Operating: -10°C to 55°C (14°F to 131°F) with no icing. Storage: -25°C to 65°C (-13°F to 149°F).
• Ambient Humidity: Operating: 25% to 85% (with no condensation).
• Temperature Influence: ±3% FS max.
• Voltage Influence: ±1.5% FS max.
• Setting Resolution: 0.01 kPa (1 mm H2O) for pressure sensors, 0.01 L/min. or 0.1 L/min. for flow sensors.
• Insulation Resistance: 100 MΩ (at 500 VDC) between current-carry parts and case.
• Dielectric Strength: 1,000 VAC 50/60 Hz 1 min.
• Vibration Resistance: Endurance: 10 to 150 Hz, 0.75 mm amplitude (half cycle) or 100 m/s2 (10G), 4 times each for 8 min. to X, Y and Z directions.
• Shock Resistance: Endurance: 300 m/s2 (30G) 3 times each to X, Y and Z directions.
• Degree of Protection: IEC60529, IP40.
• Pressure Port: Rc (PT) 1/8 female screw or 4.5 dia. pipe.
• Connection Method: Pre-wired (standard length: 2 m).
• Weight: Approx. 80 g (2.8 oz) for pressure sensors, Approx. 160 g (5.6 oz) for flow sensors.
• Material: Pressure port: resin pipe for 4.5 dia., zinc die-cast for Rc (PT) 1/8 taper screw. Case: heat-resistant PBT.

Usage Features:

• Easy-to-read display: Red LEDs provide clear visibility of measured values and settings.
• Flexible output options: Digital (NPN open collector) and analog (4-20 mA) outputs allow for integration into various control systems.
• Auto-teaching function: Simplifies setup by automatically setting ON and OFF points, reducing manual configuration effort.
• Unit switching: Pressure units can be switched between mmH2O and kPa (excluding E8Y-O-F flow sensor).
• Key-protect function: Prevents accidental changes to set values by restricting switch operation.
• Set value zero-setting: Allows for quick zero adjustment by holding down the ADJ key.
• Speed control function: Selectable display speeds (0.1 s, 0.5 s, 1.0 s) for measured pressure values.
• Mounting flexibility: Available in standard port (4.5 mm dia. pipe) and die-cast port (Rc(PT) 1/8) types for pressure sensors, and vertical or horizontal mounting types for flow sensors. Panel-mounting brackets are available as accessories.

Maintenance Features:

• Error display and warning: The device provides various error displays and warnings to indicate abnormal conditions:
  • Er.0: Pressure warning during zeroing (excess pressure/flow exceeding rated value ±5%).
  • Er.t: Teaching error display (unsuccessful teaching).
  • Er.o with flashing OUT LED: Short-circuit protection and display (overcurrent in connected load).
  • Flashing displayed value: Abnormal pressure or flow detection (applied value exceeds rated value by 10%). This error resets automatically when the value returns to the rated range.
  • Er.5: ON/OFF point input error warning (difference between ON and OFF points in window mode exceeds hysteresis value + setting resolution).
• Robust construction: Heat-resistant PBT case and zinc die-cast pressure port (for Rc(PT) 1/8 type) ensure durability.
• Circuit protection: Includes reverse polarity connection and load short-circuiting to prevent damage.

Precautions for Correct Use:

• Use within rated pressure.
• Do not mix up connecting +, - signs of pressure port.
• Do not pull the cable more than 50 N (5.1 kgf).
• Filter the gas with an appropriate air filter to ensure it is free of moisture or oil.
• When not using linear and/or ON/OFF outputs, cut the output lead wire and cover the tip with an insulation tube to prevent wrong connections.
• Avoid use in environments with explosive, ignitable, or other harmful gases.
• Do not exceed rated supply voltage or use under AC power supply.
• Do not mix up DC pole's wiring.
• Not suitable for use with corrosive or flammable gases.
• Avoid setting up beside high voltage or power lines.
• Do not expose to water.
• Do not subject the product to ultrasonic vibration.

Omron E8Y Specifications