Inovonics Wireless Corporation 3B6OT9HPX User Manual

5.3.17 06830A © Inovonics, 2017 - www.inovonics.com

Installation Instructions

The EN1252 long range dual input universal transmitter provides 
five times the power of a standard Inovonics universal 
transmitter. It is designed for use with any standard contact or 
sensor that provides a contact closure. The primary alarm input 
is selectable – normally open or closed – and the secondary 
alarm input is set to normally closed only. It can also be removed 
from the housing and interfaced with your electronic remote 
application controller, enabling it to send your application-
specific data over the Inovonics wireless network.

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

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

 Figure 1  EN1252 internal components

 Figure 2  OEM connector pinout

Note: The EN1252 OEM connector (6-pin/2x3) mounted to the 
printed circuit board receives a  Molex connector with 2mm lead 
spacing. This part can be purchased from Digi-Key using the part 
number WM18577-ND.

• One 3.0V lithium battery, Inovonics part number BAT604.
• Three drywall anchors.
• Three mounting screws.

• These products are designed to be maintained by 

professional security technicians.

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

1. Pry the top lip of the mounting bracket up, and lift the bracket 

off of the transmitter.

2. Use your thumb to depress the housing release tab on the 

bottom of the transmitter; separate the housing.

3. Install the battery.

The transmitter has a three-terminal contact block that can 
connect inputs from one or two external contact loops. The 
middle terminal is a ground, which is shared by both contact 
loops. Input one can be configured for either a normally open or 
a normally closed contact loop using the NO/NC selection pins; 
input two is always normally closed. 
4. Connect cabling to input one and/or input two, as desired. 

EchoStream products are able to use a range of radio 
frequencies, and must be configured for your geographic area. 
This product ships with a default frequency range of 902-928 
MHz for use in North America. If you are using the product in 
North America, skip to 2.5, “Select Input Type”; if you are using 
the product in Australia or New Zealand, you will need to 
configure the transmitter.
5. Place a selection jumper on the frequency band selection 

pins appropriate to your geographic area.

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

the frequency range to 921-928 MHz for New Zealand

• Place the jumper on the left two pins, marked AUS, to set 

the frequency range to 915-928 MHz for Australia.

6. 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 device to the wrong frequency band.

The N/O-N/C selection pins allow the choice of a normally open 
or normally closed state for the contact circuit wired to the input 
one terminal. The terminal is shipped set for normally closed, 
with no selection jumper on the N/O selections pins. If you need 
the input one terminal set for normally closed, no action is 
needed; skip to 2.6, “Enable/Disable Housing Tamper”.
7. Place a selection jumper on the selection pins to select 

normally open.

The tamper disable selection pins allow the housing tamper to be 
disabled. If you do not wish to disable the tamper, no action is 
needed; skip to 2.7, “Register the EN1252”. If you wish to disable 
the housing tamper:
8. Place a selection jumper on the tamper disable selection pins 

to disable the housing tamper.

9. Press the reset button to complete configuration.

Caution: When pressing the reset button, make sure you don’t 
also touch any selection pins. Touching selection pins while 
pressing the reset button can inadvertently set the EN1252 to an 
undesired configuration.

Transmitters must be registered with the system in order to be 
monitored and supervised. When supervised, the transmitter will 
send a check-in message to the receiver. Transmitters will send 
a check-in message every three minutes. Each transmitter has a 
unique factory-programmed identification number.

Note: Refer to the receiver installation instructions for details 
about registering a transmitter.

10. When prompted by the receiver to reset transmitter, press 

the reset button.

11. Replace the cover.

Caution: The EN1252 should be tested after registration to 
ensure operation. To test the EN1252, activate each of the 
conditions and ensure an appropriate response.

A Reset button

B Tamper disable selection pins

C Input two terminal (N/C)

D Ground terminal

E Input one terminal (N/O or 

N/C)

F NO/NC selection pins (input 1 

only)

G Housing tamper button

H Frequency band selection pins

I OEM connector

A Power

B Ground

C Reset

D Primary alarm

E Tamper

F Secondary alarm