7.24.19 357-06288-01 Rev A © Inovonics, 2019 - www.inovonics.com
EN1941XS One-Way Serial RF Module
Installation and Operation Manual
1 Overview
EchoStream one-way serial RF modules are designed to be easily
interfaced with your electronic remote application controller (RAC). Your
RAC contains application specific functionality and uses the RF module to
send application-specific data over the wireless network. The RF module
communicates with your application controller via a wireless connection,
and your RAC via a serial connection, allowing the assimilation of any user-
specific application into an EchoStream system. Once integrated with an
existing product, an RF module provides you with complete EchoStream
functionality.
The EN1941XS, equipped with the UART logic-level serial connection, is
primarily intended for use as a daughter board, interfacing directly with your
RAC.
Figure 1
One-way system components
1.1 Maximum Number of Repeaters for a UL 2560
Installation
To achieve the 99.99% alarm message reliability required for UL 2560
compliance, system installations must operate within the following limits for
end device and repeater counts.
1.2 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; (303) 939-9336
2 One-Way Serial RF Module Components
The EN1941XS one-way serial RF module is designed to physically
interface with your product. Serial data sent to the E*1941XS from your
remote application controller is formatted by the EN1941XS, and the data is
then transmitted as an RF message to the network coordinator.
Figure 2
One-way serial RF module components
Secondary alarm
Driving pin high triggers a secondary serial alarm status
message.
Primary alarm
Driving pin high triggers a primary serial alarm status
message.
Tamper input
Driving pin high triggers a serial tamper status message
from the RF module to the RAC. Does not trigger an RF tamper message.
Reset input
Connects a reset input, to reset the one-way serial data RF
module.
Power
Connect power cabling to an external power supply of 2.6 to 5.5
volts.
Ground
Connects to ground.
Mounting hole
Used to mount the one-way serial data RF module to the
user-specific product. The mounting hole should only be used with a nylon
standoff, never metal.
Data output
Outputs messages to the RAC.
Data input
Receives messages from the RAC.
3 One-Way Serial RF Module Dimensions
Figure 3
One-way serial RF module dimensions
End Devices
Maximum
Repeaters
150
397
250
386
350
375
500
360
1000
313
2000
238
3000
184
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below.
A
Mounting hole
B
Data output
C
Data input
D
Secondary alarm
E
Power
F
Ground
G
Primary alarm
H
LED contacts
I
Tamper input
J
Reset input
B
C
G
D
I
J
E
F
A
H
1.3”
Pitch:
2.54mm.
.385” to
Center of
First Pin
.090” to
Center
of First
Pin
.335” to
Center
of Hole
.515” to
Center of
Hole
.156”
Diameter
.5”
2.525”