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RS-232↔RS-422
Interface Converter
CUSTOMER
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
SUPPORT
Mailing address: Black Box Corporation, 1000 Park Drive, Lawrence, PA 15055-1018
INFORMATION
Web site: www.blackbox.com • E-mail: info@blackbox.com
P W R
R R
T A
D S R C T S D A
FEBRUARY 1998
IC456A-R3
IC456C-R3
IC456A-R4
IC456C-R4
4 2 2
2 3 2
T A
D S R C T S D A
T
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Summary of Contents for Black Box IC456A-R3
- 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 SUPPORT Mailing address: Black Box Corporation, 1000 Park Drive, Lawrence, PA 15055-1018 INFORMATION Web site: www.blackbox.com • E-mail: info@blackbox.com...
- Page 2 RS-232↔RS-422 INTERFACE CONVERTER 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.
- Page 3 RS-232↔RS-422 INTERFACE CONVERTER INSTRUCCIONES DE SEGURIDAD (Normas Oficiales Mexicanas Electrical Safety Statement) 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. 3.
- Page 4 RS-232↔RS-422 INTERFACE CONVERTER TRADEMARKS USED IN THIS MANUAL Any trademarks mentioned in this manual are acknowledged to be the property of the trademark owners.
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Page 5: Table Of Contents
RS-232↔RS-422 INTERFACE CONVERTER Contents Chapter Page 1.Specifications ..............4 2. -
Page 6: Specifications
RS-232↔RS-422 INTERFACE CONVERTER 1. Specifications 64,000 bps, max. Speed — Connectors — RS-232 port: DB25 female; RS-422 port: DB37 female Indicators — 7 LEDs show status of RS-232 and RS-422 signals and indicate power ON. RS-232 Port: DSR, CTS, DATA; RS-422 Port: DSR, CTS, DATA Controls —... -
Page 7: Introduction
RS-232↔RS-422 INTERFACE CONVERTER 2. Introduction The RS-232↔RS-422 Interface Converter provides bi-directional synchronous or asynchronous conversion of all commonly used RS-232 and RS-422 signals. The unit is designed to operate with one port configured as Data Terminal Equipment (DTE) and the other port as Data Communications Equipment (DCE). - Page 8 RS-422 equipment if you have problems. Models There are three models of the RS-232↔RS-422 Interface Converter. • IC456A-R3 — a standalone unit for 115-VAC operation. • IC456AE-R3 — a standalone unit for 230-VAC operation. • IC456C-R3 — a printed circuit card for rack-mounted units.
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Page 9: Installation
RS-232↔RS-422 INTERFACE CONVERTER 3. Installation To connect the Converter to your devices, follow these steps: 1. Attach the cable from the RS-422 device to the 37-pin female receptacle on the rear panel of the Converter. 2. Attach the cable from the RS-232 device to the 25-pin female receptacle on the rear panel of the Converter. - Page 10 RS-232↔RS-422 INTERFACE CONVERTER RACK POWER AC POWER RS-422 RS-232 CONNECTOR CONNECTOR CONNECTOR CONNECTOR XW1A XW2A XW3A XW4A XW4B XW5A XW5B DIP SHUNTS XW1B XW2B XW3B DIP SHUNTS CR8 CR5 CR6 CR10 CR9 CR4 CR7 DSR CTS DATA POWER DSR CTS DATA RS-422 RS-232 INDICATORS...
- Page 11 RS-232↔RS-422 INTERFACE CONVERTER RS-422 INTERFACE SET TO DCE RS-422 TO RS-232 DTR/DSR RS-422 TO RS-232 RTS/CTS XW1A XW1B DATA RS-422 TO RS-232 DATA XW2A XW2B DB37 PIN XW3B FEMALE XW3A POWER CR10 XW4A XW4B RS-232 TO RS-422 DTR/DSR XW5A RS-232 TO RS-422 RTS/CTS OFF <->...
- Page 12 RS-232↔RS-422 INTERFACE CONVERTER Figures 3-3a and 3-3b show some typical synchronous applications. DIP SHUNT SETTINGS RS-232 RS-422 INTERFACE RS-232 MODEM CONVERTER OR MODEM RS-232 ELIMINATOR TERMINAL DIP SHUNT SETTINGS RS-232 RS-422 INTERFACE RS-232 MODEM CONVERTER OR MODEM ELIMINATOR Figure 3-3. Synchronous Applications. Applications involving asynchronous devices are also possible.
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Page 13: Leds
RS-232↔RS-422 INTERFACE CONVERTER ECEIVER ERMINATION WITCH This switch is marked S1 on the printed circuit-board diagram in Figures 3-1 and 3-2. This switch serves to terminate the receiver with pull-up and pull-down resistors in order to designate the receiver state and enable the Converter’s anti-streaming function. - Page 14 RS-232↔RS-422 INTERFACE CONVERTER ↔ RS-232 <--> RS-422 Signal Flow Diagram (Arrows indicate the direction of signal flow.) RS-232 RS-422 (Port is DTE) (Port is DCE) SW1 A (RS-422 DATA LED) Send Data A (-) Send Data B (+) SW1 B (RS-232 DATA LED) Receive Data A (-) Receive Data B (+)
- Page 15 RS-232↔RS-422 INTERFACE CONVERTER ↔ RS-232 <--> RS-422 Signal Flow Diagram (Arrows indicate the direction of signal flow.) RS-232 RS-422 (Port is DCE) (Port is DTE) Send Data A (-) (RS-232 DATA LED) Send Data B (+) SW1 B (RS-422 DATA LED) Receive Data A (-) Receive Data B (+) SW1 A...
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Page 16: Ground Strap And Interface Pinouts
RS-232↔RS-422 INTERFACE CONVERTER 4. Ground Strap and Interface Pinouts Signal grounds (Pins 19, 20, and 37 on the RS-422 interface and Pin 7 on the RS-232 interface) are connected together, but not connected to chassis ground (Pin 1). However, for applications requiring all grounds to be at a common reference point, these pins can be connected to chassis ground by installing a jumper strap across W6 located at the rear of the printed-circuit board between J1 and P1 (refer to Figures 4-1 and 4-2). - Page 17 © Copyright 1998. Black Box Corporation. All rights reserved. 1000 Park Drive • Lawrence, PA 15055-1018 • 724-746-5500 • Fax 724-746-0746...