Inovonics Wireless Corporation 3B6OT9EPT User Manual

3.15.18 07230A © Inovonics, 2018 - www.inovonics.com

Installation and Operation Manual

Connected to a Neptune E-CODER® register for submetering, the 

EN1550EP encoder pulse meter transmitter will transmit data to an RF 

receiver that is connected to an Inovonics receiver and data logger.

If you have any problems with this procedure, contact Inovonics Wireless 

technical services:

• E-mail: support@inovonics.com
• Phone: (800) 782-2709; (303) 939-9336

 Figure 1  EN1501/EN1501-XL Components

• Three drywall anchors.
• Three mounting screws.
• One piece of mounting tape.

• These products are designed to be maintained by professional 

submetering technicians.

• Products are tested for indoor use.
• All products should be manually tested weekly.

Connect the transmitter to the register as follows:
1. Open the housing by pressing down on the base tab near the wiring 

through-hole while lifting away the cover. 

2. Fully insert stripped wires into the removable header terminal.
3. Use a small Phillips screwdriver to tighten the screws that secure wires 

to the removable header terminal.

4. Attach removable header terminal (if removed) to the transmitter board 

as shown.

 Figure 2  Connect the transmitter to the Neptune E-CODER register

5. Use the double-sided tape to mount the transmitter to a clean wall.
6. As desired, secure the transmitter to the wall with the mounting bracket, 

screws, anchors and/or mounting tape. 

Note: To secure the EN1550EP, you will need to remove the battery to 

access the mounting screw hole. Make sure to press the reset button after 

replacing the battery to initialize the transmitter.

Note: Ensure cabling enters the housing through the access wiring 

through-hole, and replace the housing (Figure 2).

 Figure 3  Mount the Transmitter

7. Confirm that transmitter is connected to the meter.
8. Confirm that the battery is installed.
9. Press reset to take the transmitter out of shipping/sleep model.
10. See the appropriate user documentation for specific registration 

instructions.

When the low battery message is received, you will need to replace the 

EN1550EP battery.
1. Open the housing by pressing down on the base tab near the wiring 

through-hole while lifting away the cover.

2. Remove the old battery, taking note of the battery orientation.
3. Insert the new battery, making sure it is aligned correctly.
4. Press the reset button.
Note: EN1550EP transmitters retain programming data in non-volatile 

memory. They do not require reprogramming after loss of power. Install 

new battery and press the transmitter reset button to initialize the 

transmitter and restore programming. Its count will go to zero and the initial 

Meter Read count will be updated in the data logger.

A Battery

B Tamper switch

C Removable header 

terminal

D Reset button

A Anchor installed in wall

B Double-sided tape

C Mounting screw