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Modems

Short-Haul Modem Model B Async

Short-haul modem model B async is an asynchronous, full-duplex, 4-wire line driver/receiver which allows two EIA-232 devices to communicate at distances of up to 4 miles and at data speeds of up to 19,200 bps.

Overview

Short-haul modem model B async is an asynchronous, full-duplex, 4-wire line driver/receiver which allows two EIA-232 devices to communicate at distances of up to 4 miles and at data speeds of up to 19,200 bps. In addition to the transmitter and receiver circuits, SHM-B Async includes EIA-232 control line interfaces, status monitor LEDs, and a loopback switch. SHM-B is available in both a standalone version and a rack-mount version.

SHM-B Async is designed to operate over a 4-wire metallic circuit. Optimum performance is obtained with twisted pair cable. Most types of twisted pair cable may be used, often with little or no performance degradation. SHM-B Async is designed for maximum operator safety. There are no voltages greater than 12V DC or 16V AC present on the circuit board of the unit. Receive lines are protected from potential ground differences through optical isolators rated at 1500V.

Specifications

Others

  • Maximum Storage Temperature
    • 85 degree Celsius
  • Minimum Storage Temperature
    • -55 degree Celsius
  • Maximum Outside Transmission Distance
    • 1610/1220 millimetre
  • Maximum Operating Humidity
    • 85% (Non-Condensing) Percentage
  • Brand
    • Honeywell Security
  • Communications Protocol
    • RS-232

Others

  • Maximum Storage Temperature
    • 85 degree Celsius
  • Minimum Storage Temperature
    • -55 degree Celsius
  • Maximum Outside Transmission Distance
    • 1610/1220 millimetre
  • Maximum Operating Humidity
    • 85% (Non-Condensing) Percentage
  • Brand
    • Honeywell Security
  • Communications Protocol
    • RS-232
  • Maximum Storage Temperature : 85 degree Celsius
  • Minimum Storage Temperature : -55 degree Celsius
  • Maximum Outside Transmission Distance : 1610/1220 millimetre
  • Maximum Operating Humidity : 85% (Non-Condensing) Percentage
  • Brand : Honeywell Security
  • Communications Protocol : RS-232