User manual

Manual WWP-IIRO-8

Chapter 5: Specifications

General

• Intelligence: Type 8051 microcontroller family provides capability of local control

• Protection: Watchdog Timer circuit

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

• Weight: 19.0 oz

Power Requirements

• Voltage Range: 7.5 to 16 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

• 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 Ω nominal

• Gain: 2.1 dBi

• Length: 7"

• Polarization: Vertical

• Wave: Half Wave

• Connector: SMA reverse polarity plug (RPSMA)

Isolated Inputs

• Number: Eight

• Type: Non-polarized, optically isolated from each other and from the computer

(CMOS compatible)

• Logic Input Low: -0.5 V to 0.8 V

• Logic Input High: +3.0 V to +33.0 V

• Isolation: 60V channel-to-ground or channel-to-channel

• Input Resistance: 1.8K ohms in series with two diodes and an LED

• Change of State Detection: Change-of-state flags can be set on either the rising or falling edge of any

enabled input bit and can be read via the serial port