Black Box TL074A-R4 6-Port (MS-6) Modem Splitter

Black Box TL074A-R4 RS232 Passive Splitter, DB25, 6-Port
Model: TL074A-R4
Availability: Contact Westward Sales
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Black Box TL074A-R4 RS232 Passive Splitter, DB25 (F), 6-Port

Use the TL074A-R4 Modem Splitter to connect six terminals to one modem and save money - you won't need extra modems and extra lines! The Modem Splitter allows an RS-232-C DCE device, such as a modem, to interface with up to six RS-232-C DTE devices, such as terminals. The MASTER port is configured DTE and PORTS 1 - 6 are configured DCE. No jumpers and/or switches are located on the Modem Splitter. No special cables are needed. It uses ordinary straight-pinned cables for a hookup, and includes a 6-ft. DB25 male/DB25 female extension cable and a serial DB9 female/DB25 male AT adapter.

The Modem Splitter is transparent to speed and protocol and works equally well in sync and async environments.

Key features

  • MASTER port is configured DTE and PORTS 1 - 6 are configured DCE
  • Signals present on the MASTER connector at pins 1, 3, 5, 6, 7, 8, 15, and 17 are sent to the corresponding pins on each of the PORT connectors
  • Signals present on the PORT connectors at pins 2, 4, and 20 are passively stored and sent to the corresponding pins on the MASTER connector
  • Data coming into the MASTER port on pin 3 of the RS232 DB25 Passive Splitter goes to all three Slave ports since they are all tied common
  • 1 Year Double Diamond™ Warranty (Standard) included. Extended warranty available. Contact Westward Sales.

In the Box

  1. (1) Modem Splitter
  2. (1) 6-ft. DB25 Male/DB25 Female Extension Cable
  3. (1) Serial DB9 Female/DB25 Male AT Adapter
CategorySerial Connectivity
ProtocolSynchronous or asynchronous
Serial Interface
CategorySerial Switch
Serial Ports6 RS-232
Flow ControlRS-232 (master port DTE, slave ports DCE)
SignalsPins 1 8, 15, 17, 20
Dimensions7.5"H x 2.5"W x 1.3"D (19.1 x 6.4 x 3.3 cm)
Weight2 lb. (0.9 kg)
Download NameFile Size
TL074A-R4 Application Diagram6.66KB
TL074A-R4 Manual.pdf76.75KB