Custom
Integrated Sensor Interface
Very Low Current Operation from a CR2032 Battery
Compatible with RFM miniMESHTM Network Protocol
Ready-to-Use Module 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 RFMs very low-current SAW resonator stabilized transmitter technology with low-power microcontroller technology to achieve long battery life. The module is compatible with RFMs miniMESHTM network protocol, which provides add-on plug-and-play multicast mesh network routing. The CM2201N is certified for operation under FCC 15.249 regulations. Absolute Maximum Ratings Rating All Input/Output Pins Non-Operating Ambient Temperature Range Electrical Characteristics Value Units
-0.3 to +4.0
-50 to +100 V oC CM2201N 916.50 MHz Transmitter Module Characteristic Sym Notes Minimum Typical Maximum Units Operating Frequency Modulation Type Encoded Data RF Transmission Rate Peak Radiated Field Strength (FCC OP-1) Battery Digital Input Logic High (Sensor) Digital Input Logic Low (Sensor) Operating Ambient Temperature Range fO EO TA 916.30 916.70 MHz OOK 4.8 20,000 CR2032 kb/s V/m V V oC VDD 0.45
+85 2.4 0
-40 1 Figure 1 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 gener-
ates 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 RFMs miniMESHTM network protocol, which provides add-on plug-and-
play multicast mesh network routing to improve com-
munication range and robustness. FCC Labels and Notices 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 re-
ceived, including interference that may cause unde-
sired operation. A clearly visible label is required on the outside of the users (OEM) enclosure stating that this product con-
tains a CM2205 radio module, FCC ID: TE6-
CM2201N. 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 users authority to operate this device. 2
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C Pin and Pad Descriptions Pin J2-1 J2-2 J2-3 J3-1 J3-2 J3-3 J3-4 J3-5 Name Description SNR PWR This pad is the +3 V power supply for the external alarm sensor. SENSOR This pad is a logic input driven by the external alarm sensor. GND VPP VDD GND PGD PGC This pad is the ground return for the external alarm sensor. This pad is used to program the microcontroller. No connection should be made to it in normal operation. This pad is used to program the microcontroller. No connection should be made to it in normal operation. This pad is used to program the microcontroller. No connection should be made to it in normal operation. This pad is used to program the microcontroller. No connection should be made to it in normal operation. This pad is used to program the microcontroller. No connection should be made to it in normal operation. 3 Figure 2 Note: Specifications subject to change without notice. file: CM2201Nd.vp, 2005.10.18 rev 4
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