EE660 - Low Air Velocity Sensor with RS485 Interface

Introduction

ℹ️ PLEASE NOTE

Find this document and further product information on our website at www.epluse.com/ee660.

Electrical Connection

⚠️ WARNING

Incorrect installation, wiring or power supply may cause overheating and therefore personal injuries or damage to property. For correct cabling of the device, always observe the presented wiring diagram for the product version used. The manufacturer cannot be held responsible for personal injuries or damage to property as a result of incorrect handling, installation, wiring, power supply and maintenance of the device.

Hardware

? NOTICE

Improper handling of the device may result in its damage.

The bus termination shall be realized with 120 Ω resistor using the switch on the electronics board.

The power supply must be strong enough to ensure supply voltage within the specified range (see technical data) at any time and at all devices in the bus. This is particularly relevant when using long and thin cables as those can cause high voltage drop. Please note that a single EE660 requires peak current of 150 mA.

Wiring

Digital Interface

The digital interface wiring diagram shows connections for power supply and the RS485 interface. Pin 1 is for V+ (Power Supply), Pin 2 for GND (Ground). Pins 3 and 4 are for the RS485 communication: Pin 3 is A (=D+) and Pin 4 is B (=D-). The diagram also indicates connections for a remote probe.

Power supply: 24 V AC/DC ±20%

Address Switch

The address switch section illustrates two DIP switches, S1 and S2. S1 controls the response time: 'ON' selects a slow response time, while 'OFF' selects a fast response time. S2 is for the termination resistor, with 'ON' enabling the 120 Ω termination resistor and 'OFF' disabling it.

Address Setting

Address Setting via PCS10 Product Configuration Software

All DIP switches at position 0 → address has to be set via PCS10.

Modbus (slave device): factory setting 65 (permitted values: 1...247).

BACnet (master device): factory setting 65 (permitted values: 0...127).

Example: Address is set via configuration software = factory setting.

Address Setting via DIP Switch

Modbus (slave device): Setting the DIP switches to any other address than 0, overrules the Modbus address set via PCS10 (permitted values: 1...247).

BACnet (master device): Setting the DIP switches to any other address than 0, overrules the BACnet address set via configuration software.

BACnet Note: permitted values are 0...127. The 8th bit of the DIP switches is ignored. To set address 0 via DIP switches, the 8th bit shall be set to 1 (ID 0 = 1000 0000). Example: Address set to 11 (= 0000 1011 binary).

BACnet Setup

Please refer to PICS (Product Implementation Conformance Statement), available on www.epluse.com/ee660.

Modbus Setup

FLOAT32 Parameters

¹⁾ The choice of measurement units (metric or non-metric) must be done according to the ordering guide, refer to EE660 datasheet. Switching from metric to non-metric or vice versa by using the PCS10 is not possible.
²⁾ Register number (decimal) starts from 1.
³⁾ Register address (hexadecimal) starts from 0.

INT16 Parameters

⁴⁾ Examples: For scale 100, the reading of 2550 means a value of 25.5. For scale 50, the reading of 2550 means a value of 51.

Communication Settings (INT16)

¹⁾ Register number starts from 1.
²⁾ Protocol address starts from 0.
³⁾ Number of registers.
⁴⁾ For Modbus address and protocol settings refer to Application Note Modbus AN0103 (available at www.epluse.com/ee660).
⁵⁾ If the ID is set via DIP-Switch the response will be NAK.

Device Information (INT16)

EE660 - Low Air Velocity Sensor with Analogue Output

Wiring

Voltage output 0-10 V

The wiring diagram for voltage output 0-10 V shows power supply connections and remote probe connections. Power supply is 24 V AC/DC ±20%. Remote probe connections are: b (brown) for V+, g (green) for GND, y (yellow) for AV_U, and w (white) for AV_I. The device connections are: Pin 1: V+ = power supply, Pin 2: GND = ground, Pin 3: AV_U = voltage output, Pin 4: AV_I = current output.

Current output 4-20 mA

The wiring diagram for current output 4-20 mA shows power supply connections. Power supply is 24 V AC/DC ±20%. The device connections are: Pin 1: V+ = power supply, Pin 2: GND = ground, Pin 3: AV_U = voltage output, Pin 4: AV_I = current output.

Jumper Settings

For performing the EE660 settings via the PCS10 Product Configuration Software (free download from www.epluse.com/pcs10) the jumper for the measuring range must be set to HI.

Selection of response time t90

The diagram shows jumper positions labeled HI, MED, and LO for the t90 setting. The text specifies that the factory setting is a slow response time of 4 seconds, and a fast response time of 1 second is achieved with no jumper.

Selection of the measuring range

The diagram shows jumper positions labeled HI, MED, and LO for selecting the measuring range. 'Jumper HI' sets the range to 0...2 m/s (0...400 ft/min). 'Jumper MED' sets the range to 0...1.5 m/s (0...300 ft/min). With 'no jumper', the range is set to 0...1 m/s (0...200 ft/min).