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© 2012 Inovonics - www.inovonics.com

EchoStream® EN1235SF/EN1235DF Fixed 
Location Alarm Transmitter

Installation Instructions - 05834C, January 24, 
2012

1 Overview

The Inovonics EN1235DF double button fixed location alarm 
transmitter and EN1235SF single button fixed location alarm 
transmitter feature a rugged design and housing and wall tamper 
protection.  The EN1235DF and EN1235SF are designed for fixed 
position signaling.

Note: 

For UL installations, refer to the 

EN4216MR Installation and 

Operation Manual

, the 

EN4232MR Installation and Operation 

Manual

, or the 

EN7285 Installation Instructions

.

1.1 Inovonics Wireless Contact Information

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

• E-mail: [email protected]
• Phone: (800) 782-2709

1.2  Transmitter Components

 Figure 1  

Transmitter components

2 Installation and Startup

2.1 Installation Notes

• These products are designed to be maintained by professional 

security technicians.

• Products are intended for indoor use.
• Manually test all products weekly.

2.2 Install/Replace the Battery

1.

Insert a small screwdriver into the notch on the bottom of the 
transmitter, press the housing release tab, and, without twisting, 
lever the housing apart..

 Figure 2  

Open the Housing

2.

If replacing a battery, remove the old battery.

3.

Install the new battery.

4.

Press the 

Reset

 button to initialize the transmitter.

2.3 Select the Frequency Band

EchoStream products are able to use a range of radio frequencies, 
and must be configured for your geographic area. To configure the 
transmitter:

1.

Place a selection jumper on the appropriate frequency band 
selection pins.

• Leave the jumper off the pins to set the frequency range to 

902-928 MHz for North America.

• Place the jumper on the top two pins, marked AU, to set the 

frequency range to 915-928 MHz for Australia.

• Place the jumper on the bottom two pins, marked NZ, to set 

the frequency range to 921-928 MHz for New Zealand.

Note: 

Only devices set for use in North America are configured for 

UL installations. 

2.

Press the 

Reset

 button to complete configuration.

Caution: 

When pressing the 

Reset

 button, make sure you don’t 

also touch the frequency band selection pins. Touching the 
frequency band selection pins while pressing the 

Reset

 button can 

inadvertently set the transmitter to the wrong frequency band.

2.4 Mount the Transmitter

To operate correctly, the transmitter must be mounted.  

Caution: 

The transmitter must be mounted to operate correctly.  If 

not mounted, the transmitter will remain in a tamper state.

Caution: 

For UL installations, mount the EN1235DF/SF in a 

concealed area, where its operation cannot be viewed from a public 
space.

To mount the transmitter:

1.

Use the included hardware to mount the back plate of the 
transmitter housing to the mounting surface.

2.

Hook the bottom of the transmitter into the back plate, then clip 
the top into place.

A

Reset button

B

Frequency band selection pins

C

Tamper switch

B

A

C

Lever Open 
the Housing

Printing Instructions

1.

Print duplex

2.

Align and orient back page to match front 
page.

3.

Cut on dashed line

4.

Fold cutsheet in half along the 8.5" axis.

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