Murata Electronics North America CM2201N Users Manual
Custom
®
Integrated Sensor Interface
•
Very Low Current Operation from a CR2032 Battery
•
Compatible with RFM miniMESHTMNetwork Protocol
•
Ready-to-Use Module
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CM2201N
916.50 MHz
The CM2201N is a 916.5 MHz transmitter module designed to monitor industrial alarm
sensors. Communication range in an “open field” environment is typically 100 meters.
The CM2201N combines RFM’s very low-current SAW resonator stabilized transmitter
technology with low-power microcontroller technology to achieve long battery life. The
module is compatible with RFM’s miniMESH
“plug-and-play” multicast mesh network routing. The CM2201N is certified for operation
under FCC 15.249 regulations.
Absolute Maximum Ratings
Rating Value Units
All Input/Output Pins -0.3 to +4.0 V
Non-Operating Ambient Temperature Range -50 to +100
Electrical Characteristics
Characteristic Sym Notes Minimum Typical Maximum Units
Operating Frequency f
Modulation Type OOK
Encoded Data RF Transmission Rate 4.8 kb/s
Peak Radiated Field Strength (FCC OP-1) E
Battery CR2032
Digital Input Logic High (Sensor) 2.4 VDD V
Digital Input Logic Low (Sensor) 0 0.45 V
Operating Ambient Temperature Range T
TM
network protocol, which provides add-on
O
O
A
o
C
916.30 916.70 MHz
-40 +85
Transmitter
Module
20,000 µV/m
o
C
1
C M 2201N Sensor Transm itter B lock D iagram
+
SNR PW R
SENSO R
GND
Test Button
J2-1
J2-2
J2-3
M icrocontroller
Pow er S up ply is a 3 V
C R 2032 "C oin C ell"
B a tte ry
SAW
Resonator
Theory of Operation
The major components of the CM2201N include an
RFM SAW resonator stabilized transmitter and a
Microchip PIC12F200 microcontroller. The transmitter
operates on a frequency of 916.5 MHz, at a nominal
output power of 0.5 mW. The microcontroller generates “heart beat” transmissions periodically, plus an
immediate transmission in the event of a sensor alarm
or test button activation. The CM2201N is powered by
a replaceable 3 V CR2032 lithium “coin cell” battery.
The CM2201N is compatible with RFM’s miniMESH
TM
network protocol, which provides add-on “plug-andplay” multicast mesh network routing to improve com
munication range and robustness.
FCC Labels and Notices
Tuning
+
Figure 1
This device complies with Part 15 of the FCC rules.
Operation is subject to the following two conditions:
(1) this device may not cause harmful interference,
and (2) this device must accept any interference received, including interference that may cause undesired operation.
A clearly visible label is required on the outside of the
user’s (OEM) enclosure stating that this product contains a CM2205 radio module, FCC ID: TE6CM2201N.
WARNING: This device operates under Part 15 of the
FCC rules. Any modification to this device, not ex-
pressly authorized by RF Monolithics, Inc., may void
the user’s authority to operate this device.
2
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