ERA Products

Watch the video below to program the ERA-PIR transmitter to the ERA-DCRX receiver.

If you are trying to find information on pairing the ERA-UTX transmitter to the receiver, click here.  Or,  you can watch this video and rather than triggering the passive infrared motion sensor (ERA-PIR), simply trigger the ERA-UTX by pressing the push button on the unit.

The ERA-DCRX is a four (4) zone receiver meaning each zone will play a distinct sound.  You can program / pair as many transmitters (such as a push button) to a zone as you want, but all the transmitters in that zone will play the melody selected for that zone.

For example, zone 1 may be set to play the "ding-dong" sound.  When any transmitter paired to the zone is triggered, the receiver will play the "ding-dong" sound.  In this example, I have a push button on the front door paired to zone 1.

For zone 2, I want to program a push button for the back door.  When programming, I set that zone to play the Westminster  Chime.  When that push button is triggered, the receiver will play the Westminster Chime.

This enables you to distinguish a visitor at the front door versus the back door.

The only real limitation with the ERA series of products are the number of zones.  As mentioned in a previous FAQ article, you can pair as many transmitters to a specific zone as you want.

There's not a limit to the number of receivers you can have in your system.  Whether you have 1, 2, or 4 different transmitters, you can have as many receivers as you want and can spread them throughout your warehouse, store or office space.

This type of configuration allows you to distribute the sound throughout your facility.  You may, for example, play a receiver in the warehouse and turn the volume up to its maximum setting.  However, because you might keep your door shut in your office, you may want to put your own ERA-DCRX receiver in the office and turn the volume down--or even mute it.

Each of the four (4) zones on the ERA-DCRX receiver has a live 12V DC output.

These outputs enable you to connect an external device to the output to activate when that zone is triggered.

For example, let's say you operated a loud workshop and when loud machinery is turned on, it's hard to hear the receiver.  The live 12V DC outputs provides a couple of options.

One option is using a 12V DC LED Strobe Light and connect it to the output for a zone.  When a visitor arrives and presses the compatible push button, the ERA-UTX, not only does the paired receiver(s) play the chosen chime sound, the bright strobe light will provide a good visual indicator.

Safeguard Supply provides packaged kits that come with a strobe light (4 colors to choose from) along with "bellwire" (a bundle of 18AWG wire), as well as the push button and receiver in the WDK-ERA-STROBE.

Another option would be to connect a loud 105 dB rated siren to the 12V DC output.  When a visitor arrives, the chime plays, and the siren plays a very loud sound to alert you that a visitor has arrived.

Like the WDK-ERA-KIT, Safeguard Supply also has the WDK-ERA-KIT with options like a FIREBELL, SIREN, and Chrome Enclosed Buzzer to choose from.

Each zone has its own 12 V DC output.  That means you can mix and match 12V accessories, like a different strobe color for each zone, to help you better determine which push button or magnetic entrance alert was triggered.

Below are brief instructions on how to connect a 12V DC device, such as a strobe light, siren, buzzer, etc. to a zone on the ERA-DCRX receiver.

1. Unplug the receiver.

2. Separate top receiver case from bottom receiver case.

3. Locate terminal block (see image below) located on the bottom of the pc board.


4. Loosen screws for the zone(s) that you are connecting a device to.

5. Wire the external 12V DC into the terminal connection blocks that
corresponds to the respective zone. For example, if a push button is
paired to zone 1, and you want a strobe to flash for zone 1, wire the
strobe into the terminal block for zone 1.

6. Observe polarity when necessary. For example, for a strobe light,
ensure you are connecting the positive wire on the strobe to the positive
terminal on the receiver.
7. Re-tighten screws on terminal block.
8. Adjust output duration as needed (see image below)


ERA-DCRX 12V Output Duration is set by moving jumper settings inside the unit.

9. Snap cover back together.
10. Plug in receiver.  In the image below, there are two different 12V DC devices connected, one per zone.

How to Connect An External Device to the C-Form Relay on the ERA-DCRX

*Please note, in most cases it is sufficient to use the 12V DC outputs to connect an external device to the systemFor these instructions on this process, click here.

Each ERA-DCRX receiver has 1 x C-form relay for integrating and connecting external devices.  Unlike the 12V DC outputs (1 per zone) on the receiver, the C-Form relay DOES NOT supply power to the external device you are connecting to it.

Why use the C-Form relay?

The C-Form relay offers advantages and flexibility the 12V DC outputs do not offer.  For example, with the 12VDC output, the device you are powering has to be rated for 12V or less.  In addition, the external device you are connecting has to have a max current below 400mA.  This is not the case with the C-Form relay as it does not supply the power, but rather functions more like a switch.

Another advantage of the relay is that it's not limited to one zone.  There are dip-switches on the ERA-DCRX that allows you to associate the device on the C-Form relay with any combination of the four zones.  Let's say, for example, you have to push buttons, one for zone one, and another for zone two.  You might want to put a different colored strobe light on each of these zones.  Red on zone one and blue on zone two.  Push button A triggers the zone 1 melody and the red strobe, and push button B triggers the zone 2 melody and the blue strobe. You like the fact that the strobes provide a good visual notification, but want something really loud.  Using the C-Form relay, you add a loud siren or firebell to also trigger when one (or both) of the push buttons are pressed.

How to connect an external device to the C-Form Relay?

In this example, we are going to connect a 12V DC firebell to the relay and make the assumption you have a push button programmed to zone one (1) and another push button programmed to zone two (2).

1) Make sure plug-in transformer is NOT plugged in and ERA-DCRX receiver is NOT plugged in.

2) Flip dip switches 1 & 2 up, 3 &4 down.  This setting associates the C-Form relay with zones 1 and 2.

3) Set duration time.  This will determine how long the external device will turn on.

4) Connect black wire from firebell to the "NO" terminal screw on section labeled "relay."

5) Connect red wire from firebell to left terminal screw on plug-in transformer.

6) Use a wire to connect right terminal screw on the plugin transformer (ignore the center screw on transformer) to the "COM" terminal screw on the ERA-DCRX output section labeled relay.

7) Plug everything back in and start using!

ERA DCRX Wired for External Connections.  Drawing to illustrate how to wire strobe and buzzer, and use C-Relay for fire alarm bell.

With a range of up to 4,000 ft., there are extreme situations where the ERA-UTX transmitter (push button) may not connect with your ERA-DCRX wireless plugin receivers.  Thick concrete, steel doors, or other factors may reduce the wireless signal so much that you cannot achieve the distance you need.

A solution to the problem can be achieved using the normally open relay in the ERA-UTX.  The illustration below shows an example of how a wired push button is wired to the ERA-UTX wireless transmitter.

When the wired push button is pressed, it triggers the wireless transmitter to the wireless receiver.  By placing the wired button outside and placing the wireless transmitter inside, the number of barriers the radio signal has to go through is dramatically reduced, thus improving the wireless signal and range from transmitter to receiver.

  • This same scenario works with a wired magnetic door contact.
  • Polarity is not important.
  • Use a non-lighted wired push button only.  A lighted button will drain the battery from the wireless transmitter.
  • Use the normally open relay on the transmitter.  They are not labeled on the unit itself, wire it as in the image below.

This applies to the following ERA transmitters (ERA-DSTX, ERA-UTX, ERA-PIR)

-The ERA-DCRX (receiver) has four zone indicator lights that blink when triggered.

-When the battery is low in a transmitter paired to a corresponding zone, the zone indicator LED for that light will blink for 10 minutes when that zone is triggered.

-When the battery is low in a transmitter paired to a corresponding zone, the melody for that zone will play twice (normally the melody will play only one time).

For the ERA-PIR-SPK:  when the battery is low, the melody will play twice, instead of once.