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Black Box MX867A Manual
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Black Box MX867A Manual

Black Box MX867A Manual

Miniature local multiplexor
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SEPTEMBER 1999
MX867A
Miniature Local Multiplexor
CUSTOMER SUPPORT INFORMATION
Order toll-free in the U.S.: Call 877-877-BBOX (outside U.S. call 724-746-5500)
FREE technical support 24 hours a day, 7 days a week: Call 724-746-5500 or fax 724-746-0746
Mailing address: Black Box Corporation, 1000 Park Drive, Lawrence, PA 15055-1018
Web site: www.blackbox.com • E-mail: info@blackbox.com

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  • Page 1 Order toll-free in the U.S.: Call 877-877-BBOX (outside U.S. call 724-746-5500) FREE technical support 24 hours a day, 7 days a week: Call 724-746-5500 or fax 724-746-0746 Mailing address: Black Box Corporation, 1000 Park Drive, Lawrence, PA 15055-1018 Web site: www.blackbox.com • E-mail: info@blackbox.com...
  • Page 2 MINIATURE LOCAL MULTIPLEXOR FEDERAL COMMUNICATIONS COMMISSION INDUSTRY CANADA RADIO FREQUENCY INTERFERENCE STATEMENTS This equipment generates, uses, and can radiate radio-frequency energy, and if not installed and used properly, that is, in strict accordance with the manufacturer’s instructions, may cause interference to radio communication. It has been tested and found to comply with the limits for a Class A computing device in accordance with the specifications in Subpart B of Part 15 of FCC rules, which are designed to provide reasonable protection against such interference...
  • Page 3 MINIATURE LOCAL MULTIPLEXOR NORMAS OFICIALES MEXICANAS (NOM) ELECTRICAL SAFETY STATEMENT INSTRUCCIONES DE SEGURIDAD 1. Todas las instrucciones de seguridad y operación deberán ser leídas antes de que el aparato eléctrico sea operado. 2. Las instrucciones de seguridad y operación deberán ser guardadas para referencia futura.
  • Page 4 MINIATURE LOCAL MULTIPLEXOR 10. El equipo eléctrico deber ser situado fuera del alcance de fuentes de calor como radiadores, registros de calor, estufas u otros aparatos (incluyendo amplificadores) que producen calor. 11. El aparato eléctrico deberá ser connectado a una fuente de poder sólo del tipo descrito en el instructivo de operación, o como se indique en el aparato.
  • Page 5 MINIATURE LOCAL MULTIPLEXOR TRADEMARKS USED IN THIS MANUAL Any trademarks mentioned in this manual are acknowledged to be the property of the trademark owners.
  • Page 6 MINIATURE LOCAL MULTIPLEXOR Contents Chapter Page 1. Specifications....... . 6 2.

  • Page 7: Specifications

    MINIATURE LOCAL MULTIPLEXOR 1. Specifications Multiplexor Type—Time-Division User Channels—2 Speed—Subchannel: Synchronous, up to 19,200 bps; Asynchronous, up to 9,600 bps; Composite: 38.4 kbps Data Format—Synchronous: Full-duplex, transparent to protocol; Asynchronous: Full- duplex, transparent to character length and code, parity bits, stop bits, data rate, protocol, and break signal Flow Control—Software only Maximum Distance—See Tables 1 and 2...
  • Page 8 MINIATURE LOCAL MULTIPLEXOR Transmission Distance— Table 1. Approximate Synchronous Transmission Distance. Data Rate (bps) Wire Size 26 AWG 24 AWG 19 AWG (0.15 mm) (0.2 mm) (1.0 mm) 1200 2.5 mi. (4 km) 4 mi. (6 km) 5 mi. (8.5 km) 2400 1.9 mi.
  • Page 9 MINIATURE LOCAL MULTIPLEXOR Table 2. Approximate Asynchronous Transmission Distance. Data Rate (bps) Wire Size 26 AWG 24 AWG 19 AWG (0.15 mm) (0.2 mm) (1.0 mm) 1200 1.9 mi. (3 km) 2.8 mi. (4.5 km) 4 mi. (6 km) 2400 1.6 mi.
  • Page 10 MINIATURE LOCAL MULTIPLEXOR 2. Description The Miniature Local Multiplexor combines two asynchronous or synchronous signals and sends the composite signal over a 4-wire (two twisted pairs) communication line (see Figure 1 for a typical application). The multiplexor has an internal short-haul modem that uses an internal clock.
  • Page 11 MINIATURE LOCAL MULTIPLEXOR 3. Installation Proceed as follows to install the Miniature Local Multiplexor and refer to Figure 2. Jumper 0=19.2 3=7.2 6=2.4 0=9.6 6=1.2 1=14.4 4=4.8 7=1.8 2=4.8 8=0.6 2=9.6 5=3.6 8=1.2 4=2.4 Rotary Switch 4-Screw Terminal Block Figure 2. Rotary Switch, Jumper, and 4-Screw Terminal Block Locations.
  • Page 12 MINIATURE LOCAL MULTIPLEXOR 2. The unit is set at the factory for synchronous transmission at 9600 bps. The ASYNC/SYNC jumper selects transmission mode. The 9-position rotary switch selects the baud rate. Set the pointer of the switch to the number that corresponds to the baud rate as shown on the inside of the multiplexor.
  • Page 13 © Copyright 1999. Black Box Corporation. All rights reserved. 1000 Park Drive • Lawrence, PA 15055-1018 • 724-746-5500 • Fax 724-746-0746...