
15-00043
Revision 3
September 2005
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3.4 WRM2 EXT
External Transmitter Characteristics
• Transmit power output 140 mW (900 MHz), 50 mW (2.4 GHz), 3.5 mW (868 MHz)
• Receiver sensitivity -110 dBm (900 MHz) and –105 dBm (2.4 GHz).
• 868 MHz, 900 MHz or 2.4 GHz spread spectrum hopper (FHSS)
• FCC approved, IC Certified, 2.4 GHz and 868 MHz are CE marked.
• Front panel controls and connectors
• Standard RJ-22 phone handset connector for RS-232 TXD/RXD
• WRM device compatible with 3.3 DVC power output
• Configurable for two way RS-232 communications by converting pin 1 to RXD.
• TTL/CMOS or standard RS-232 serial levels
• Wide range power supply (100 to 250 VAC input) with interchangeable AC plugs
• Standard locking type DC connector, wide range input 9 to 18 VAC, coaxial connector with center + pin.
• Front panel mounted LED’s to indicate power and RX/TX data traffic.
• Optional Internal battery back up for up to 4 hours of operation.
Physical Characteristics
• Front panel controls: clearly labeled, protected from inadvertent operation
• Configuration cable: Standard WRM phone RS-232 cable or custom made RS-232 cable for
other devices with serial data output capability.
• Ruggedness: 2 drops on concrete from 1.0 m with antenna attached.
• Attachments: feet for desktop, wall mount or magnetic mount
Mechanical Characteristics
• Height: 1.2” (30 mm)
• Width: 2.75” (70 mm)
• Depth: 5.5” (140 mm)
• Weight (including batteries): 11 oz (310 g) with antenna
Electrical Characteristics
• External Power Supply: Wall pack power adaptor 100 to 250 VAC input, 15 VDC 1 A coaxial
power jack with center + pin. Threaded locking type plug.
• Power switch: Front panel slide type.
• Battery type: 9 VDC alkaline. Optional 7.2 V NiMH rechargeable.
• Battery life: At least 4 hours of full operation with alkaline, 2 hours with NiMH. Up
to 12 hours of operation for strobe type devices with radio sleep mode
enabled.
• Connectors to PC/network: Standard phone handset WRM cable or custom cable RJ-22 to DB-9F for
RS-232 connection to PC for radio configuration and external device
connection.
• Mode selection: TTL/CMOS or standard RS-232 selected via slide (DIP) switches on
board.
Environmental Characteristics
• Operating Temperature: -10°C to 50°C (14°F to 122°F)
• Relative Humidity: less than 95% RH (without condensation)
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