Distech Controls Open-To-Wireless Wireless Receiver Manuale utente

Open-To-Wireless™ Wireless Receiver

Figure1: Open-To-Wireless™ Wireless Receiver

Product Description

This document describes the hardware installation procedure for the Open-to-Wireless™ Wireless Receiver. This device uses the EnOcean® protocol for

wireless communication.

The Open-to-Wireless Wireless Receiver enables Open-to-Wireless ready controllers to receive input signals from wireless battery-less sensors and

switches. The use of wireless devices minimizes impact on building structure, preserves original architecture and materials, and saves time and costs as-

sociated with re-wiring. Moreover, having a Wireless Receiver increases controller input count and makes field upgrades simple and straightforward.

The Wireless Receiver can be installed in multiple ways. For example, it can be mounted on a surface using double-sided tape or on the exterior of a

metal enclosure using a ½-inch NPT hub. However, the Wireless Receiver performs best when the antenna is elongated and away from metal objects or

surfaces more than 1" (2.5 cm) away from metal. A 6.5 ft (2 m) long cord is provided with the Wireless Receiver to connect to the controller.

This document describes the hardware installation procedures for the 902 and 868MHz Wireless Receiver models. It is recommended that you also refer

to the Open-to-Wireless Solution Application Guide for more detailed information on how to plan and install any wireless sensor and switch network.

General Installation Requirements

For proper installation and subsequent operation of the Wireless Receiver, pay special attention to the following recommendations:

£Upon unpacking, inspect the contents of the carton for shipping damages. Do not install a damaged device.

£The device is designed to operate under the following environmental conditions:

– Ambient temperature from 32°F to 122°F (0°C to 50°C)

– Relative humidity from 0% to 90%, non-condensing

£Before installation, verify that local communication regulations allow the operation of wireless devices that communicate at the frequency of the

Wireless Receiver. For more information on transmission norms in different countries, refer to the Open-to-Wireless Solution Guide.

£Ensure proper ventilation of the device and avoid areas where corroding, deteriorating or explosive vapors, fumes or gases may be present.

Any type of modification to any Distech Controls product will void the product’s warranty

Take reasonable precautions to prevent electrostatic discharge to the device when installing, servicing or during operation. Discharge

accumulated static electricity by touching one’s hand to a well-grounded object before working with the device.

The 868MHz model is a category 2 receiver. For the 868MHz model only:

£Center frequency: 868.3MHz

£Occupied frequency band: 868.0 – 868.6MHz

£Maximum transmission power: 3dBm

For the 902MHz model only:

£Center frequency: 902.875MHz

£Occupied frequency band: 902.7-903.0MHz

£Maximum transmission power: 1dBm

Installation Guide

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Mounting Instructions

The Wireless Receiver can be mounted on a ceiling or wall using screws or double-sided tape, or on a metal enclosure using a ½-inch NPT hub. Which-

ever method is used, the Wireless Receiver should be 16” (41 cm) or more away from any network communication cables and, consequently, not too

close to the controller.

Wall/Ceiling Mounting with Tape

The Wireless Receiver can be mounted on almost any type of surface using double-sided tape. Simply apply the tape to the back of the receiver first and

then stick the receiver to the desired spot on the wall/ceiling.

Figure2: Mounting using double-sided tape

Wall/Ceiling Mounting with Wall Screws

The Wireless Receiver can also be mounted using wall screws:

1. Open the receiver by separating the front and back plates.

2. Use the mounting holes on the back plate to mark the location of the holes that need to be drilled.

3. Remove the back plate and drill the holes.

4. Clean the newly drilled holes, insert some wall anchors, and then fasten the back plate using appropriate screws.

5. Re-attach the receiver to the back plate.

Figure3: Mounting using wall screws

Metal Enclosure Mounting

If the receiver is to be mounted on a metal enclosure, then a ½-inch NPT hub can be used. A ½-inch NPT hub is composed of three parts:

Side view Side view Front view

To mount the receiver on a metal enclosure:

1. Affix the ½-inch NPT hub to the bottom of the Wireless Receiver. Ensure the cap of the NPT hub is undone.

2. Place the Wireless Receiver on the enclosure, aligning the NPT hub with the enclosure’s hole.

3. Using the cap, tighten the Wireless Receiver to the enclosure.

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Figure4:

Mounting the Wireless Receiver on a metal enclosure

The Wireless Receiver is connected to the controller’s wireless port with the supplied 6.5 ft (2 m) cable.

The Wireless Receiver’s socket is located inside the device. To locate it, open the Wireless Receiver by separating its front and back plates.

Figure5:

Location of the Wireless Receiver’s socket

Do not substitute with a cable from other sources. This cable cannot be made any longer and must not be modified.

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Wireless Receiver Dimensions

Wireless Equipment Mounting Considerations

Preserving Signal Strength

When installing the wireless equipment, it is important to ensure that distances and obstructions do not impede transmission. Metallic parts, such as rein-

forcement in walls, machinery, office furniture, etc. are major sources of field strength dampening. Furthermore, supply areas and elevator shafts should

be considered as complete transmission screens (See the next figure for radio wave screening). As a rule of thumb and in normal conditions, the equip-

ment will transmit over a range of up to 100 ft (30 m) for both 868MHz and 902MHz models.

Sheet

Metal

Tx: Transmitter Rx: Receiver

Figure6: Screening of radio wave

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Signal Transmission Quality Testing

Even under screening conditions, Distech Controls strongly recommends that you always test the signal strength regardless of the range distance be-

cause radio signals and transmission range can vary according to building and office setup. To verify the signal strength in any installation, use the RSSI

feature with EC‑

gfx

Program.

For more information on how to test signal strength, refer to the Open-to-Wireless Solution Application Guide. For more detailed information on the RSSI

feature, refer to the EC-

gfx

Program User Guide.

Transmission Obstructions and Interference

One way to get around an obstruction, such as a duct, is to place the receiver on the side of the obstruction that is nearer to the transmitter, even if the

controller is on the opposite side of the obstruction. But always keep in mind that the receiver performs best when the antenna is elongated and away

from metal objects or surfaces (more than 1" (2.5 cm)) away from metal. See the next figure for a recommended setup:

Antenna & receiver on

top OR bottom

*Bottom is the preferred position

Straighten antenna out

and away from metal

Antenna & receiver installed

directly on metal should be

avoided

Figure7: Recommended installation - receiver on a duct with controller

For more examples on how to position the wireless receiver, refer to the Mounting Instructions [pg.2] section in this document.

In addition to obstructions, the angle with which the transmission travels through the obstructions has a major influence on the field strength. The steeper

the angle through an obstruction, the more the field strength dampens (See the next figure on angles of radio wave). It is therefore preferable that the

transmission be arranged so that it travels straight and perpendicularly through the obstruction.

High Penetration Angle

Tx: Transmitter Rx: Receiver

Figure8: Angle of radio wave

The sensor mounting location should not be on the same wall or plane as the receiver. Radio waves are rather subject to interfering leaks or reflections.

Side or opposite walls are better locations.

Tx: Transmitter Rx: Receiver

Figure9: Radio wave along the wall

It is also recommended that a wireless receiver and sensor not be placed directly below or on top of each other. For example, if a wireless receiver is

placed in the ceiling, then the sensor should not be placed on the wall just below the ceiling, on the same vertical axis as the receiver. The sensor or the

receiver should be relocated to obtain a better transmission range, as illustrated in the next figure.

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Tx: Transmitter Rx: Receiver

CEILING

FLOOR

Side View

Relocate sender or

receiver

Relocate sender or

receiver

Both the sender and

receiver should NOT

be on the same axis

Figure10: Wireless Receiver Ceiling Installation

Unrelated transmitters (cell phone, GSM/DECT, WiFi, cordless phones, RFID reader) should be more than 6.5 ft (2 m) away from the receiver to avoid

possible interference.

Repeaters

Repeaters are wireless devices that help deal with the transmission problems that were mentioned previously. A repeater receives transmissions and re-

sends an amplified signal to the receiver. The transmission range can thus be increased and obstacles can be bypassed, as illustrated in the next figures

about repeaters.

Sheet

Metal

Tx: Transmitter Rx: Receiver Receiver

Figure11: Use of repeaters to bypass obstructions

High Penetration Angle

Tx: Transmitter Rx: Receiver Receiver

Figure12: Use of repeaters to avoid unfavorable penetration angle

Wireless Receivers

This section provides examples on how to properly position the wireless receiver and antenna to ensure reliable wireless communication with Open-to-

Wireless ready controllers. Keep in mind that some of the typical installations depicted in this section are limited to certain types of controllers and fre-

quencies.

The most common guidelines to remember when installing the wireless receiver are to straighten the antenna out and away from metal (at least 1” (2.5

cm) away), and never install the wireless device inside a metal enclosure (relay panels, junction box, etc.).

This example shows a typical VAV Installation within a metal enclosure:

Antenna & receiver on

top OR bottom

*Bottom is the preferred position

Figure13: Receiver Position with VAV in Metal Enclosure

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This example shows a typical metal relay panel/utility box installation:

Antenna & receiver

NOT to be installed

inside the panel

Antenna & receiver

installed on top or

side of panel

Antenna & receiver

installed directly on

metal panel should

be avoided

Figure14: Receiver Position with Metal Relay Panel Utility Box

This example shows a typical fan coil unit installation:

Antenna & receiver installed

on top or side panel

Antenna & receiver

NOT to be installed inside

the metal enclosure

Antenna & receiver

installed directly on metal

panel should be avoided

Figure15: Receiver Position on Fan Coil Unit

8 / 8 Wireless Receiver_IG_16_EN

FCC Statement

Changes or modifications not expressly approved by Distech Controls could void the user's authority to operate the equipment.

This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules.

These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment

generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause

harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If

this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and

on, the user is encouraged to try to correct the interference by one or more of the following measures:

£Reorient or relocate the receiving antenna.

£Increase the separation between the equipment and receiver.

£Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.

£Consult the dealer or an experienced radio/TV technician for help.

This device complies with Part 15 of the FCC rules and with Industry Canada’s license exempt RSS. Operation is subject to the following

two conditions:

£This device may not cause harmful interference, and

£This device must accept any interference received, including interference that may cause undesired operation of the device.

Troubleshooting Guide

Wireless Receiver not associated with controller Using the controller’s configuration plug-in or wizard, check the wireless

sensor input configuration menu. Refer to the controller’s user guide for

more information.

Power discharge 1. Recharge wireless device with light (if solar-powered) or replace battery

(if battery-powered),

2. Ensure sufficient light intensity (200lx for 4 hours/day). For recommended

settings, refer to the sensor’s Installation Guide.

Wireless device too far from the Wireless Receiver Reposition the wireless device to be within the range of the Wireless

Receiver. For information on optimal locations for wireless equipment, see

the Wireless Equipment Mounting Considerations [pg. 4] section in this

document.

Table1:

Wireless Receiver and wireless battery-less sensors and switches not communicating

For more information on how to test signal strength or troubleshooting, refer to the Open-to-Wireless Solution Application Guide. For more detailed infor-

mation on the RSSI feature, refer to the EC-gfxProgram User Guide.

Images are simulated. While all efforts have been made to verify the accuracy of information in this manual, Distech Controls is not responsible for damages or claims arising from the use of this manual.

Persons using this manual are assumed to be trained HVAC specialist / installers and are responsible for using the correct wiring procedures and maintaining safe working conditions with fail-safe environ-

ments. Distech Controls reserves the right to change, delete or add to the information in this manual at any time without notice.

Distech Controls, the Distech Controls logo, Open-to-Wireless, Innovative Solutions for Greener Buildings, and Allure are trademarks of Distech Controls Inc. BACnet is a registered trademark of ASHRAE.

Global Head Office - 4205 place de Java, Brossard, QC, Canada, J4Y 0C4 - EU Head Office - ZAC de Sacuny, 558 avenue Marcel Mérieux, 69530 Brignais, France

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