Everspring Industry Co SA823 User Manual

SA823 U-NET REPEATER

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The SA823 is a signal repeater to extend the range of U-Net two-way wireless technology. It is fully
compatible with any U-Net enabled sensors and controller.

The signal repeater is designed to be installed by a system installer in cases where signal reception is
poor or extended range is required for the home. The repeater does not alter the existing binding
network between gateway and devices, in fact devices do not need to be physically removed from their
mounting location when adding the repeater. This allows the installer to service the user in the shortest
time possible without disrupting to the home interior.

It comes with installer friendly feature such test mode to indicate signal strength using LED display and
audible beeps for areas not in line of sight such as corners. Powered by backup battery, this allows the
repeater to be easily placed anywhere while searching for its optimum location. There is the also a
Beacon mode which allows the installer to conveniently walk around the home to observe signal
strengths from the gateway when deciding on the best location.

Product Overview

Front View

RF Stat

Batt

Rear View

Wall

Tamp

Back

Repeater network overview

The role of the Repeater in a U-Net network can be summarized in the diagram below.
Level :
Repeaters are distinguished into Level-1

and Level-2 as set by their Level jumper
setting. Each pair of Level-1 and 2
repeaters define a unique signal path to
the gateway. Signals from each pair will
not cross over to another pair.

View with Battery Cover removed

Mode Switch

Level Jumpe

Buzze

Learn Button

Factory

- Level-1: Repeater closest to the gateway. In most cases adding a Level-1 Repeater is sufficient to

cover a wide range. A gateway can have more than one Level-1 Repeaters to branch out at different
angles from the gateway.

- Level-2: Repeater to extend signal from Level-1 Repeater. Only one Level-2 repeater can be added for
each Level-1 Repeater.

To create the link between the pairs, repeaters must perform U-net binding with each other. Repeaters
with the same level cannot bind with each other.

Lastly, like all end devices under the gateway’s network, each repeater must perf orm U-n et binding with
the gateway. This ensures the gateway is aware of the repeater’s own condition such as low battery,
tamper, etc.

Note: It is advisable to use as few Repeaters as possible in a network in order to reduce signal hops
between device and Gateway. Like any wireless network, more signal hops not only mean longer delay
in transmission but also adds higher risk of signal interference resulting in lost messages as more
devices are added. This degrades the overall network quality.

Join:
The repeater becomes associated with an end device through ‘Joining’. This is a loose form of binding
that tells a repeater which devices it should repeat signals for and which do not. Joining is a manual
process similar to U-net binding except there is no need to remove end devices from their mounting
position to activate a learn key. Simply trigger the end device for it to transmit its ID which is then picked
up by the repeater. Joining does not disrupt the original U-net binding between end devices with
gateway.

Inversely, a device is disassociated from the Repeater through ‘Un-join’. Removing a device from the
Repeater’s memory helps to reduce unnecessary transmission of RF signal which will improve overall
quality of the network.

LED Table

The table below describes the LED indication at various stages of the unit’s operation.

Pairing stage:

During the Repeater’s pairing activity, Status LED along with the buzzer beeps indicate the status of the
paring.

Status Status LED Buzzer Beep

Factory reset state. Repeater not

aired to any Gateway.

Enter pairing mode Steady RED Short beeps every 1 sec, followed by
Waiting to bind with gateway, time out

in 30 secs.
Pairing successful LED OFF 1 Long beep

Pairing fail after time out or
terminated
Joining fail because exceed device
limit

Device Un-join successful LED OFF 2 Long beep
Level-2 Repeater disconnected
successful
Activate Factory Reset Steady RED Short beeps, followed by 1 long beep

Testing stage (Mode switch set to TEST)

During Test mode, RF LED and the buzzer beeps indicate the signal strength.

RF LED – Test Mode Buzzer beep sound Description

Flash GREEN 3 times Short beep 3 times Signal is Good, Test mode
Flash ORANGE 2 times Short beep 2 times Signal is Normal, Test mode
Flash RED 1 time Short beep 1 time Signal is Weak, Test mode
Flash GREEN 3 times Long beep 3 times Signal is Good, Beacon mode
Flash ORANGE 2 times Long beep 2 times Signal is Normal, Beacon mode
Flash RED 1 time Long beep 1 time Signal is Weak, Beacon mode

After power up, Blinks RED
every 2 secs for 30 secs.

Blink RED, every 1 sec Short beeps every 1 sec

Flashes RED 3 times Short beep 3 times
On RED for 1 sec then OFF 3 short beeps

LED OFF 2 Long beep

None

1 lon

beep

1

Status LED – Test Mode Description

–

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Flashes ORANGE, every 1 sec Test mode activated

Normal usage (Mode switch set to NORMAL):
Once the Repeater is installed and set for daily use, the LED display becomes as follows:

Status LED – Daily usage Explanation

Steady GREEN Powered by AC power, Normal mode
Flashes GREEN, every 30 secs. Powered by backup battery, Normal mode
Flashes RED, every 30 secs. Backup battery is low
Flashes ORANGE, every 30 secs. Powered by AC but detected backup battery is low

RF LED

Flash GREEN Signal received, Normal mode
Flash RED Repeater Tamper switch activated

Daily usage Explanation

Binding With Gateway

The Repeater supports Auto-Binding feature where it will automatically enter binding mode when first
powered up after a factory reset.

1. Remove the wall bracket by pushing it downwards and then remove the battery cover.

2. Prepare three AA 1.5V batteries. Do not insert them into the unit yet.

3. Ensure the Level jumper in the Repeater is set to Level-1.

4. Set a U-net compatible gateway into binding mode. Usually this is achieved by pressing the Link

button on the gateway.

5. Insert the batteries with correct polarity at this point. Within a few seconds a long beep sound will

be heard indicating the pairing is complete.

6. Time-out will occur if the binding process was unsuccessful, indicated by 3 short beeps. If this

happens, refer to the Manual Binding procedure in the Troubleshooting section.

Note: A Repeater must reset back to factory default before it can pair with another gateway. See the
Factory Reset section in the Troubleshooting section.

Adding a Device (Join process)

1. Put repeater into Joining mode by pressing the learn button until 3 beeps is over and release.

Repeater will enter learning mode for 30 secs.

2. Bring the repeater in close range to the device, around ~10cm.

3. Simply trigger the device (PIR trigger, door sensor open, etc.) to emit a signal which will be picked

up by the Repeater.
Note:

- Unlike binding, there is no need to press learn key on device.

- Refer to the LED Table for details of pairing indicators.

4. Once the signal is picked up by the Repeater, it will emit one long beep sound. Joining process is

complete. From now on Repeater will start routing signal for this device.

5. Time-out will occur if the Joining process is unsuccessful, indicated by 3 short beeps.

Note: PIR motion sensors will have a retrigger interval or sleep period which lasts longer than the
Repeater’s 30 secs Join period. If time out occurs, try again when the PIR is ready. If necessary,
cover the PIR with a dark cloth when preparing the Repeater.

6. Repeat the steps above for other devices.

Note :

- Each Repeater supports a maximum of 8 devices.

- Keypad and Siren devices are NOT supported by this Repeater.

- Remote keyfobs do not need to Join to any Repeater. All Repeaters will retransmit signals from
Remote Keyfobs in the same network.

- A Repeater will Join only devices from the same gateway paired to the Repeater

- A device can Join to only one Repeater at any one time. If the device needs to Join to another
Repeater, it must first Un-Join from the first Repeater. The Un-Join procedure is similar to Join
procedure except two beeps will be heard when completed.

- If any device is deleted by the gateway, the gateway will inform the Repeater to Un-Join this device
from its memory.

Testing

There are two signal test methods provided by the Repeater;

- Test Mode : this tests the signal between the end device to Repeater

- Beacon Mode : this tests the signal between the Repeater to Gateway. It is also used to test signal

between Repeaters.

RF LED Flash Green 3 times Flash Orange 2 times Flash Red 1 time
Beep sound* 3 long beeps 2 long beeps 1 long beep

Good Normal Wea

Test Mode

This is used when searching for a good spot to mount the Repeater. In this mode the unit will indicate
signal strength for each signal sent by the device.

1. Join a device to the Repeater as described above.

2. Set the Mode switch to Test mode.

3. Place the Repeater at a distance away from the end device.

4. Trigger the device, e.g. open a door sensor or press the on/off button on a smart plug. The

Repeater will indicate the received signal strength as follows:

RF LED Flash Green 3 times Flash Orange 2 times Flash Red
Beep sound 3 short beeps 2 short beeps 1 short beep

5. Set the Mode switch back to Normal mode to exit.

Good Normal Wea

1 time

Beacon Mode

In this mode the Repeater transmits a ping signal to the gateway at every 5 sec s interval. The reply
signal from the gateway is then measured for strength and indicated by RF LED and buzzer beeps. This
feature allows the installer to walk around the premises while observing the signal quality at the spot.
This is useful for;

- identifying weak areas for placing a sensor

- testing signal strength between Repeater and Gateway before mounting it permanently

- testing the signal strength between Repeater pairs when adding a second Repeater.

To use Beacon mode with a Gateway;

1. Set the Mode switch to Test mode.

2