Black Box 26658 User Manual

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IEEE 1284 SerialParallel Converter

Connect async serial hardware to an IEEE 1284 bidirectional interface.



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»Converts serial to IEEE 1284 parallel.

»Runs at speeds up to 115.2 kbps.

»Supports two IEEE 1284 Bi-Tronicsmodes: Compatible and Nibble (switchable).

»Super compact, pocket size.

»LEDs provide at-a-glancemonitoring.

»Power choices: from both interfaces or from an external power supply.

»Features 10-kVESD (electrostatic discharge) protection on the serial interface.

Use your speedy IEEE 1284 laser printer with your async RS-232hardware!

HP LaserJet


Modular Cable




IEEE 1284 Serial→Parallel


Converter (PI049A)


Adapter, DB9 Female

or DB25 Female PC

(FA065 or FA027)




Get more out of your equipment with the IEEE 1284 SerialParallel Converter from Black Box. Use your speedy IEEE 1284 laser printer with your asyncRS-232/423hardware. You can use this converter with all your hardware equipped with an IEEE 1284Bi-Tronics® parallel interface.

This tiny box gives you lots of operational options because it works in either Level 1 Compatible or Nibble modes (according to the IEEE 1284 standard). So it supports the high speeds—upto 115.2 kbps— necessary forgraphics-intensivelaser-printerapplications. Depending on your equipment, all you have to do is set a switch to change modes.

Conversion is simple. On the serial side, the converter translates Nibble operations into standard HP® LaserJet® IV serial printer escape sequences. This enables operation with standard printer drivers.

On the parallel side, the converter translates all commands received from the PC or other serial devices into Bi-TronicsNibble operations or Compatible operations.

The converter supports all Bi-TronicsLevel 1 compatible hardware and isbackward-compatiblewith Level 2 hardware.


T e c h S P e c s

Electrostatic Discharge (ESD) Protection — 10 kV on the serial interface Flow Control —

Serial: Hardware or software (X-ON/X-OFF),user selectable; Parallel: Hardware

Leads Supported — Serial: 1–8;

Parallel: Pins 1–13active; 31, 32, 36 held high;16–30ground

Power Requirements — IEEE 1284 B interface must support optional 5 V on Pin 18, IEEE 1284 C must support interface Pin 36; otherwise, use included external AC power supply

Speed — 9600 bps; 19.2, 38.4, 115.2 kbps Transmission Format — Serial: Async, full-duplex;

Parallel: IEEE 1284 [supports Nibble and Level 1 compatible modes (switchable)]

CE Approval — Yes

Interface — RS-232,RS-423Connectors — Serial: (1)RJ-45;

Parallel: (1) 36-pinCentronics M Indicators — (2) LEDs: Power, Data Mode

Power — From RS-232/423and IEEE 1284 interfaces;

External wallmount transformer: Input: 120 VAC, 60 Hz, 10 W; Output: 9 VDC, 500 mA

Size — 3"H x 2.4"W x 0.8"D (7.6 x 6.1 x 2 cm) Weight — 0.5 lb. (0.2 kg)

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Technically Speaking

IEEE 1284.

Introduced in 1994, the IEEE 1284 standard addresses data-transferspeeds and distance for parallel interfaces. Standard parallel interfaces support speeds of up to 150 kbps at distances of up to 6 feet (1.8 m); IEEE 1284 parallel inter-

faces can send your data over 100 times faster at up to 5 times the distance!

Although the Centronics® interface enabled onlyunidirec-tionalcomputer-to-peripheraldata flow, the

IEEE 1284 interface enables bidirectional flow so peripherals can send data to the computer.

The IEEE 1284 standard covers five separate parallel modes, from the original Centronics (with which it’s compatible) to the high-performanceEnhanced Parallel Port (EPP) mode.

The computer negotiates with the attached device to deter-minewhich mode to use.



IEEE 1284 SerialParallel Converter


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