Murata Electronics North America CM2202N User Manual

Cus tom

®

In te grated Sen sor In ter face

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Very Low Cur rent Op er a tion from 2 BR1225 Bat teries

• Com pat i ble with RFM miniMESH

•

Ready-to-Use Mod ule

TM

Net work Pro to col

CM2202N

916.50 MHz

The CM2202N is a 916.5 MHz trans mit ter mod ule de signed to mon i tor in dus trial alarm
sen sors. Com mu ni ca tion range in an “open field” en vi ron ment is typ i cally 100 me ters.
The CM2202N com bines RFM’s very low-cur rent SAW res o na tor sta bi lized trans mit ter
tech nol ogy with low-power microcontroller tech nol ogy to achieve long bat tery life. The
mod ule is com pat i ble with RFM’s miniMESHTM net work pro to col, which pro vides add-on
“plug-and-play” multicast mesh net work rout ing. The CM2202N is cer ti fied for op er a tion
un der FCC 15.249 reg u la tions.

Ab so lute Max i mum Rat ings

Rating Value Units

All In put/Out put Pins -0.3 to +4.0 V
Non-Operating Am bi ent Tem per a ture Range -40 to +85

Elec tri cal Char ac ter is tics

Characteristic Sym Notes Minimum Typical Maximum Units

Op er ating Fre quency f
Mod u la tion Type OOK
En coded Data RF Trans mis sion Rate 4.8 kb/s
Peak Radiated Field Strength (FCC OP-1) E
Bat tery BR1225
Dig i tal In put Logic High (Sen sor) .85 VDD VDD V
Dig i tal In put Logic Low (Sen sor) 0 .15 VDD V
Op er ating Am bi ent Tem per a ture Range T

O

O

A

o

C

916.30 916.70 MHz

-20 +70

Transmitter

Module

20,000 µV/m

o

C

1

Test Button

CM2202N Sensor Transmitter Block Diagram

+

J2-5
J2-4
J2-3

J2-2
J2-1

SAW
Resonator

Power Su pply is 2

3V BR1225 "Coin Cell"

Batteries

Figure 1

Tuning

+

The ory of Op er a tion

The ma jor com po nents of the CM2202N in clude an
RFM SAW res o na tor sta bi lized trans mit ter and a
Micro chip PIC12F635 microcontroller. The trans mit ter
op er ates on a fre quency of 916.5 MHz, at a nom i nal
out put power of 0.5 mW. The microcontroller gen er

­ates “heart beat” trans mis sions pe ri od i cally, plus an
im me di ate trans mis sion in the event of a sen sor alarm
or test but ton ac ti va tion. The CM2202N is pow ered by
2 re place able 3 V BR1225 lith ium “coin cell” bat tery.
The CM2202N is com pat i ble with RFM’s miniMESH

TM

net work pro to col, which pro vides add-on “plug-and­play” multicast mesh net work rout ing to im prove com

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mu ni ca tion range and ro bust ness.

FCC La bels and No tices

This de vice com plies with Part 15 of the FCC rules.
Op er a tion is sub ject to the fol low ing two con di tions:
(1) this de vice may not cause harm ful in ter fer ence,
and (2) this de vice must ac cept any in ter fer ence re ­ceived, in clud ing in ter fer ence that may cause un de

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sired op er a tion.

A clearly vis i ble la bel is re quired on the out side of the
user’s (OEM) en clo sure stat ing that this prod uct con

­tains a CM2202N ra dio mod ule, FCC ID:
TE6-CM2202N.

WARNING: This de vice op er ates un der Part 15 of the
FCC rules. Any mod i fi ca tion to this de vice, not ex­pressly au tho rized by RF Monolithics, Inc., may void
the user’s au thor ity to op er ate this de vice.

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