Sensinext W/sc420-915 User manual

W/SC420-915 Installation Instructions 1

W/SC420

W/SC420W/SC420

W/SC420-

-915

915915

915

Wireless Transceiver with an Interface for 4-20mA

Current Loop Sensor

Installation Instructions

1. INTRODUCTION

1. INTRODUCTION1. INTRODUCTION

1. INTRODUCTION

The W/SC420-915 is a two-way wireless transceiver with an embedded interface for the very robust and

popular 4-20mA current loop sensor signaling standard.

The device wakes up periodically, according with the programmed ‘Reporting Period’ (see 2.4.

Configuring the Device and also check the ‘Wireless Control Panel Operating Instruction’ manual) and

switches ON an embedded power source having a nominal voltage rate of 16V to feed an attached 4-

20mA current loop sensor. The device then waits a ‘Stabilization’ time, as programmed (see 2.4.

Configuring the Device and also check the ‘Wireless Control Panel Operating Instruction’ manual), and

when this time expires, it samples the loop’s current using an embedded, high resolution, 24 bits wide

ADC.

The sampled current is then transmitted to a Wireless Control Panel for further processing, reporting

and storage. Check the ‘Wireless Control Panel Operating Instruction’ for more information.

Operating power is obtained from two on-board 3V Lithium batteries. When the battery voltage is low, a

“low battery” message is sent to the Control Panel.

Caution!

Risk of explosion if battery is replaced by an incorrect type. Dispose of used battery according to

manufacturer's instructions.

Figure 1: External View

2. INSTALLATION

. INSTALLATION. INSTALLATION

. INSTALLATION

2.1 Mounting

In order to achieve a good quality of communication link, a good practice is to install the transceiver high as practically possible, mounted on a

wall or a pole, where at least one meter radius of the space in the front of the transceiver box is clear from metallic objects.

It is also advised that the transceiver is not installed in close proximity to electronic equipment such as work stations, routers and or any other

type of radiating equipment.

It is recommended that before the actual mounting of the device in the final installation location, the communication link from the preferred

location is first tested. In order to test the quality of the link, the device must first be enrolled to the control panel (see 2.2. Enrollment). Note: It is

recommended to perform the enrollment when standing next the control panel and only then, when the device is enrolled and functional, to

proceed with the field installation as described here.

To test the quality of the link press momentarily the 'Enroll/Test' button (see Figure 2). The red LED starts blinking slowly, while all possible

routes to the control panel are tested. This may take up to 15 seconds. When the test is completed and the best route is selected, the

transceiver flashes shortly the green LED 3 times to indicate that the quality of the link is excellent, both LEDs (green and red) to indicate that the

quality of the link is good or only the red LED to indicate that the quality of the link is poor. If communication cannot be established, no LED is

flashed.

LED Response Link Quality

3 x green LED flashes Excellent

3 x green & red LED flashes Good

3 x red LED flashes Poor

No flashes No communication

Figure 2: ‘Enroll/Test’ Button

Enroll/Test Button

W/SC420-915 Installation Instructions 2

Important Note: When the link quality test indicates good link, poor link or no link at all, the quality of the link needs to be improved either by

selecting another installation location or by adding range extender in between the device and the control panel.

WARNING! To comply with FCC and IC RF exposure compliance requirements, the transceiver should be located in a distance of at least 3

meters from all persons during normal operation. The antennas used for this product must not be co-located or operated in conjunction with

any other antenna or transmitter.

2.2 Senso Wi ing

The device feeds the loop with 16V (exciting the sensor) at

one terminal of the connector and measures the current

loop which flows to the second terminal of the connector

(see

Figure 3

Disconnect the batteries and connect the sensor to the

device as described above. Fasten the connector screws

properly. When sensor wires are properly assembled, you

may insert the batteries and cover the device.

4-20mA Current

Loop Sensor

16V

Top View

Figure 3: Sensor Wiring

Note: improper wiring of the sensor might damage the sensor and/or the device

2.3. En ollment

To enroll a new device, follow the steps described below (see also ‘Wireless Control Panel Operating Instruction’ manual).

Step 1 Step 2 Step 3 Step 4 Step 5

Enter the Installer menu

and select DEVICES

Select ADD NEW

DEVICES Option

See Note [1]

Enroll the device by:

Option A:

Pressing the ‘Enroll/Test,

button for about 4 seconds,

until the green and red

LEDs light.

When green and red LEDs

light, release the button

quickly

Option B:

Enter the device ID

Select a desired

Sequence-Number for the

sensor

Select DEV

SETTINGS to configure

the device

See also 2.4. Configuring

the Device







means scroll

and select

Note:

[1] If the device is already enrolled you may configure the device parameters via the “MODIFY DEVICES option, see also 2.4.

Configuring the Device

2.4. Configu ing the Device

Enter the menu select the device that you want to configure, and configure the following parameters:

Option Configuration Instructions

Selects the period between sensor sample and report. Please note: the shorter the report period, the higher the

average consumption current (i.e. shorter battery life expectancy)

Optional settings: Every 10 Secs, 20 Secs, 30 Secs, Minute, 2 Minutes, 3 Minutes, 4 Minutes

•

Determine the time needed for the sensor to stabilize after voltage (16V) is supplied. The sensor is sampled only

after the stabilization time is expired. Please note: the longer the stabilization time, the higher the average

consumption current (i.e. shorter battery life expectancy)

Optional settings: 5 ms, 10 ms, 50 ms, 100 ms, 200 ms, 500 ms, 1 s, 2 s, 5 s, 10 s, 15 s, 20 s, 30 s, 60 s,

S06: DEV SETTINGS

Stabilization

Reporting Period

MODIFY DEVI ES

ID No. 281-XXXX

S06: 4-20mA Sensor

ENTR ID:XXX-XXXX

ENROLL NOW or

MODIFY DEVI ES

ADD NEW DEVI ES

DEVI ES

W/SC420-915 Installation Instructions 3

FCC Compliance Statement

The FCC Wants You to Know

This equipment has been tested and found to comply with the limits

for a Class A 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:

a) Reorient or relocate the receiving antenna.

b) Increase the separation between the equipment and

receiver.

c) Connect the equipment to an outlet on a circuit different

from that to which the receiver is connected.

d) Consult the dealer or an experienced radio/TV technician.

FCC Warning

Modifications not expressly approved by the manufacturer

could void the user authority to operate the equipment under

FCC Rules.

NOTE: THE MANUFACTURER IS NOT RESPONSIBLE FOR ANY RADIO OR TV

INTERFERENCE CAUSED BY UNAUTHORIZED MODIFICATIONS TO THIS

EQUIPMENT. SUCH MODIFICATIONS COULD VOID THE USER’S AUTHORITY TO

OPERATE THE EQUIPMENT.

W.E.E.E. Product Recycling Declar

ation

For information regarding the recycling of this product you must contact the company from which you orignially purchased it. If you are discarding this product and not

returning it for repair then you must ensure that it is returned as identified by your supplier. This product is not to be thrown away with everyday waste.

Directive 2002/96/EC Waste Electrical and Electronic Equipment.

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