Description

The WMO-400S radio modem provides RS232 or RS485 connections by radio. It provides are wireless connection between a PLC and remote dataloggers, sensors and supervisory computers.

The WMO-400S has been designed to be easy to use and simple to install. It operates in the frequency range of 430-490MHz, with low and high transmitter power and a maximum achieveable range of up to 60 miles (100Km). Each modem can operate as a repeater and to a serial device, allowing the units to optimise the network and an increased range.

Features

  • Provides wireless connectivity for serial devices
  • User-configurable frequency and RF power
  • Remote configuration and diagnostics
  • Supports wide range of network topologies
  • Distances of up to 100km (60 miles) achievable
  • Link status indication available as an output
  • Repeater capability

Specifications

Serial Port

Port types: 1 x RS485 (1.2 to 187.5 kb/s),1 x RS232 (1.2 to 115.2 kb/s) and a second RS232 port for configuration/diagnostics.
Data Configuration: 7/8 data bits, 1/2 stop bits, odd/even/no parity

Digital Input/Output

One I/O channel
Input voltage-free contact / Output FET 30V DC 500mA
DI can be transmitted to remote DO
Also used for alarm output, or powering up local devices, or hot redundant standby control.

Radio Specifications

Frequency: 430 – 490MHz radio transceiver, half-duplex or simplex operation. Up to 9.6/19.2 kb/s wireless data (12.5/25 kHz channels)
Frequency configurable: 5/6.25 kHz steps within ±10MHz band
Frequency tolerance: +/-1.5 ppm over temperature range
Configurable transmitter power: 10 to 500mW, 0.5 to 5W
Data modulation: DFSK, GMSK, 4-level FSK
Duty cycle: 50%, 30 second maximum transmission time, also limited by configurable timeout and internal thermal shutdown protection
Receiver sensitivity: –112dBm @ 10E-3 BER–120dBm @ 12dB SINAD
Lightning protection: Internal gas discharge arrester

General

Environmental

Temperature Range: -30°C to +60°C
Humidity: 0 to 99% non-condensing

Input Power

Supply Voltage: 11 to 30V DC
Battery Charger: Float charge voltage 13.8V DC with current limit set to 1.6A (minimum supply voltage 15V)
Low power sleep mode: configurable using DTR control

Physical

Housing: Powder-coated, extruded aluminium
Dimensions: 140 x 114 x 30mm
Mounting: ‘T’ section 35mm DIN rail to EN 50022
Weight: 0.4 kg