User manual

Manual WM-IIRO-8

Chapter 5: Specification

General

• Connectivity: A serial cable connects the host computer’s COM port

with ACCES’s W M-DP-232 m odem, which in turn

communicates with the WM-IIRO-8 via a 900 MHz

wireless connection.

• Intelligence: Type 8051 microcontroller family provides capability of

local control.

• Protection: W atchdog Timer circuit

• Mem ory: Up to 32k RAM & 32k EEPROM.

• Size of NEMA4 box: 4.53" long by 3.54" wide by 2.17" high

• W eight: 19.0 oz

Power Requirements

• Voltage Range: 7.5 to 15 volts

• Current Range: 130 mA - idle mode

30 mA - increase per relay activation

100 mA - increase during constant transmission

470 mA - maximum

Idle mode may be reduced to 70 mA with cyclic sleep mode

900 MHz Radio

• Frequency Range: 902 to 928 MHz, Unlicensed ISM Band

• Type: Frequency Hopping Spread Spectrum Transceiver

• Throughput: 9600 baud

• Transmit Power: 100mW

• Receiver Sensitivity: -110dBm

• Outdoor Range: 7 miles ( theoretical with line of sight )

• Interference Rejection: 70dB at pager and cellular phone frequencies

900 MHz Antenna

• Frequency Range: 902 to 928 MHz

• Impedance: 50 S nominal

• Gain: 2.1 dBi

• Length: 7"

• Polarization: Vertical

• W ave: Half W ave

• Connector: SMA reverse polarity plug (RPSMA)