WIT910M Features: Benefits: Fast, low latency wireless serial data Suitable for point-to-point and point-to- transmission multipoint networks Robust 900 MHz frequency hopping Supports large number of nodes 900 MHz spread spectrum technology High immunity to interference and More than 20 mile outdoor range with multipath fading FHSS omni-directional antennas Supports long range applications Transceiver 3.3 volt operation, low power Easy to integrate consumption Ideal for battery powered devices Module Small size, light weight Certified for unlicensed operation in the USA and Canada WIT910M transceiver modules are designed to transmit serial data using highly robust 900 MHz frequency hopping spread spectrum (FHSS) technology. WIT910M modules employ RFMs beacon-synchronized TDMA at an RF data rate of 172.8 kb/s to achieve low transmission latency. WIT910M transceivers are suitable for both point-to-point and point-to-multipoint networks. FHSS technology provides strong immunity to both interference and multipath fading. The small size, light weight and low power consumption of these transceiver modules make them suitable for a wide variety of applications. WIT910M modules are certified for unlicensed operation in the USA, Canada, Australia, Israel and New Zeland. Shown with shield removed General Specifications RF Frequency 902 to 927 MHz Radio Certifications FCC Part 15, Canadian RSS-210 Operating Range Indoor - 1000 ft, Outdoor - more than 20 miles with omni-directional antenna Network Topologies Point-to-point and point-to-multipoint (star) Network Protocol Dynamically assigned TDMA Error Detection and Correction 24-bit CRC and ARQ Serial Data Interface Asynchronous (UART) CMOS signals, 3.3 V, 5 V tolerant Serial Data Rate up to 115.2 kb/s, software selectable Channel Data Rate 172.8 kb/s Number of Frequency Channels 54 RF Bandwidth 460 kHz Transmit Power Output 10, 20, 27 or 29 dBm, software selectable Receiver Sensitivity -103 dBm for 10-5 BER Supply voltage 3.3 to 10 V for up to 27 dBm transmit power, 5 to 10 V for 29 dBm transmit power Current Consumption Remote Sleep 250 A Base Station Receive 125 mA 29 dBm Transmit Power, Operation: Standby 43 mA Operation: Transmit 800 mA 57.6 kb/s Serial Data Rate Receive 100 mA Transmit 800 mA Size 80.2 x 46.5 x 8.6 mm Weight 35 g Operating Temperature -40 C to +80 C Humidity 20% to 90% (non-condensing) www.RFM.com E-mail: info rfm.com Page 1 of 2 2008-2012 by RF Monolithics, Inc. WIT910 - 2/28/12Long Operating Range With 29 dBm of transmit power and a receive sensitivity of -103 dBm, the WIT910M can achieve ranges in excess of 20 miles using 3 dBi omni-directional antennas. When long range isnt needed, the WIT910M, measuring just 80.2 x 46.5 x 8.6 mm and weighing just 35 grams, is a powerful performer at low power, consuming only 100 mA at 3.3 volts. With the same size and mounting dimensions of the industry- leading WIT2410M4G module, the WIT910M can be used in place of the WIT2410M4G in existing designs, creating a 900 MHz product with little development effort. Reliable The WIT910M provides both reliable communication and reliable operation. Using robust frequency hopping spread spectrum technology, the WIT910M provides immunity to jamming as well as immunity to multipath fading. Using a 24-bit CRC for error detection, automatic retransmit request (ARQ) and a 512 byte data buffer, error-free transparent communication is automatic. Built-in data scrambling adds a measure of security. Reliable operation is assured through RFMs stringent QA processes. All WIT910Ms are manufactured in an ISO9000 certified facility. Simple Simple to integrate and use, the WIT910Ms default parameter settings work for most applications. For other applications, software control makes changing parameter settings easy. The WIT910M, with its small size and low power consumption, is simple to integrate into your product. The WIT910Ms RS-232 style interface with standard 3.3 volt CMOS signal levels makes integration easy. Since WIT910M modules are certified for license free operation in the USA and Canada, your WIT910M based product does not have to repeat radio regulatory approval. Versatile WIT910M operating parameters are configurable under software control. Even the transmitter power level can be selected using a straight- forward command set. Both point-to-point and point-to-multipoint modes are supported. Baud rates from 1.2 to 115.2 kb/s are provided for serial communication between a WIT910M and its host. Connector Pinout Pin Signal Type Description 1 Gnd - Signal and chassis ground 2 TxD Input Data input to be transmitted 3 RxD Output Received data output 4 CFG Input Configuration select, used to switch radio between data and control mode 5 RTS Input Request to send input, used for receive flow control by the host 6 Sleep/DTR Input Module sleep/DTR input, sleep is active high 7 DCD Output Data carrier detect, indicates FHSS synchronization on remotes 8 CTS Output Clear to send output, used for receive flow control by the radio 10 Power Down Input Low power mode input, active low 16 Vcc Positive supply - minimum 3.3 V, 5 V minimum for 29 dBm transmit power, maximum 10.0 V Physical Specifications - dimensions in inches (mm) COUNTERSINK AND CLEARANCE HOLE FOR 2-56 2.0 X 0.4 FLATHEAD SCREW. (2 PLCS) PIN 1 .135 3.43 RF CONNECTOR .21 5.3 1.83 46.5 1.69 42.9 1.48 37.6 .74 26.1 .21 5.3 1.69 42.9 .13 3.3 .13 3.3 .34 8.6 3.16 80.2 www.RFM.com E-mail: info rfm.com Page 2 of 2 2008-2012 by RF Monolithics, Inc. WIT910 - 2/28/12