Black Box ME721A-M-R3 Async RS232 Short Haul Modem, DB25 Male

Black Box ME721A-M-R3 Async RS232 over CATx Short-Haul Modem (SHM-NPR), Non-powered, DB25 Male to Terminal Block
Model: ME721A-M-R3
Availability: Discontinued

*** DISCONTINUED ***  This product is discontinued and there is no designated replacement. Contact Westward Sales to discuss an alternative option.

 

Black Box ME721A-M-R3 RS232 over CATx Short-Haul Modem, Non-powered, DB25 Male

Extend async RS-232 devices beyond the 50 ft. limitation using CATx cables at data rates up to 19.2-kbps and reach distances of 5 mi. (8 km) with the ME721A-M-R3. For an interface-powered modem, the SHM-NPR really packs a punch. Forget about the 50-foot (15.2-m) RS-232 limit. This simple, plug-in SHM pushes data up to 1.2 miles (2 km) at 19.2 kbps or more than 5 miles (8 km) at 2400 bps. It has a DB25 male connector that plugs into your terminal. To connect your asynchronous devices to a host, use a pair of our SHM-NPRs - or a single SHM-NPR and a Short-Haul Modem-B Async (ME800A-R4). The SHM-NPR is powered from the RS-232 interface. If your device doesn't provide interface power, use the ME800A-R4 on one side of the line.

Key Features

  • Full duplex operation over 4-wire CATx
  • Data rate up to 19.2 kbps
  • Range of up to 8 km (5 miles) at 19.2 kbps over 24 AWG lines
  • Transformer isolation to protect unit
  • DCE/DTE switch for easy direct connection no special cables needed
  • Interface powered by handshake signals no AC power required
  • 1 Year Double Diamond™ Warranty (Standard) included

Note

Must be used in pairs or, if your device doesn't provide interface power, use the SHM-C Async (ME800A-R4) on one side of the line.

Technology
CategorySerial Connectivity
Transmission Distance5.3 mi. (8.5 km)
Serial Interface
CategorySerial Extender
Flow Control4-wire full-duplex
Power
Rated Power9 VDC from the interface; DTE Pins 5 or 6, DCE Pins 4 or 20
Download NameFile Size
ME721A-M-R3 Application Diagram22.3KB