EMX Industries, Inc. Tech support: 216-518-9889 4/5
Connecting the Transmitter
5. Mount the transmitter near the edge sensor using two #8 machine screws,
washers, lock washer and nuts. Pass the edge sensor wires through the sealing
nut as in step 2. Mount the transmitter with the sealing nut facing down to
prevent water from entering the housing.
6. Connect the resistor equipped edge sensor wires to the transmitter
terminal block (#3 on image). Insert batteries. The LED (#2 on image)
will quickly flash 2x every two seconds.
•Never connect more than one edge sensor to a single transmitter.
•The edge sensor must have a resistance between 4K –12K ohms.
•A channel LED flashing three times per second indicates that the
batteries are low (less than 2.7 V) and need to be replaced.
7. After powering the receiver, the system status LED will flash rapidly while it is
finding a clean operating frequency (this can last several seconds). Once
completed, the system status LED will flash on/off every 2 seconds. Initialization
is now complete.
To perform a factory reset of the receiver, press 1 and 4 channel
assignment buttons simultaneously until the status LED flashes quickly.
This will clear all connected channels and reset the system.
8. To enter channel assignment mode, on the receiver, hold down the desired channel assignment button
until the systems status LED begins flashing rapidly, then release the button.
To exit channel assignment mode, wait 120 seconds or cycle power to the receiver.
9. On the transmitter, press and hold down the connection button (#4 on image above) for 1 - 2 seconds until
its LED stops flashing rapidly. Upon successful connection, the LED flashes once every four seconds. If the
transmitter fails to connect, it will return to its initial state, with the LED flashing twice fast every two
seconds. If this occurs, repeat this step. If the transmitter continues to fail to connect, proceed to the
troubleshooting section.
To remove a connection from the transmitter, hold down the connection button. The LED will turn
on solid for several seconds, and then flash twice every two seconds when disconnected.
10. Test the connection. Without activating the edge sensor, observe the channel LEDs on the receiver. They
should be off for any channel connected to a transmitter. Activate the edge sensor being tested. On the
receiver, the channel LED for the tested edge’s channel should turn on. On the transmitter, the LED
should flash twice every second while the edge sensor is activated. If the channel does not exhibit this
behavior, double check the edge sensor wiring, termination, and transmitter batteries.
11. Repeat steps 5 through 10 for each additional transmitter. Never connect more than one edge sensor to
a single transmitter.
WEL-200 Compatibility (Red Board and Green Boards)
1. New WEL-200 systems (Red Boards) will not be compatible with older receivers and transmitters (Green
Boards). This is because of an upgrade to the communication protocol as well as other advancements in
the system’s ability to find clean RF channels.
2. Using the color of the boards is the best way to determine compatibility.
-Transmitters with a GREEN PCB must be used with a receiver that also has a GREEN PCB.
-Transmitters with a RED PCB must be used with a receiver that also has a RED PCB.
