Legacy

  User's Manual for Series

  ANC-6000

  RS232/RS422 Interface Adapters

The photos above are linked to the specific datasheets for
our RS232 to RS422 adapters.

Copyright

  Copyright (c) 1994-1998 by Antona Corporation.   All rights reserved.   No part of this publication may be transmitted, transcribed, stored in a retrieval system, or translated into any language or computer language, in any form or by any means, electronic, mechanical, magnetic, optical, chemical, manual or otherwise, without the prior written permission of the Antona Corporation of Los Angeles, California.

Warranty

  Antona Corporation products are warranted to be free from defects in materials and workmanship for a period of two (2) years from the date of original shipment to customer.   This warranty is limited to the replacement or repair of parts not subjected to misuse, neglect, unauthorized repair, alteration (except card options), accident, or failure due to the effects of static electricity discharge.

  In no event shall Antona Corporation be liable to the purchaser for loss of use, profit, or consequential damages, or damages of any kind, including, but not limited to, accidental loss or damage to other equipment, arising out of use of Antona Corporation equipment, whether or not said equipment was used properly.   The designer is responsible for the determining the suitability and use of the product.

  This warranty is in lieu of any other warranty, expressed, implied, or statutory, including, without limitation, any implied warranty or merchantibility or fitness for a particular purpose. No amendment of this warranty may be effected except in writing by an officer of the Antona Corporation.

Warrenty Repairs

Features
Overview
Mechanical Specifications
Electrical Specifications
ANC-6090/6022 Installation
ANC-6090S/6090D Installation
Video vertical synchronization interrupt
Serial Port
Cable Termination 
Adapter Jumper Options 
ANC-6090 Tx - Rx Pin Reverse Jumpers
ANC-6022 Tx - Rx Pin Reverse Jumpers
Tx - Rx Jumper Function Chart
Video vertical sync. interrupt jumper
External connections to ANC-6022 8DB9 RS-232C Signals
External connections to ANC-6090
DB9 to DB25 chart for Adapter Use
RS422 connections to ANC-6090
DB9 RS-422 Signals for Master (Multimedia Controller) 
DB9 RS-422 Signals for Server (Receive from Master)
Appendix A - Sample Program listing
Appendix B - Troubleshooting

Features

• True EIA RS232 and RS422 interfaces
• Full duplex operation
• Baud rates to 115.2 Kbaud
• Uses DB-9 connector on PC serial port
• Powered from serial port for most installations
• Latest surface mount technology (SMT) for low power and small size
• Pin connections on converted signal side mate directly to many professional multimedia units (SMPTE interface for Sony, BTS, Grass Valley, Ampex, etc.)
• ANC-6022 provides input for composite video to detect vertical sync
• ANC-6090 external adapter perfect for laptops and portables
• ANC-6090S/D internal adapter for powered permanent installations

Overview

  The ANC-6000 series adapters convert the RS-232C level signals input and output on an IBM personal computer (PC) or compatibles into bipolar-current RS-422 type signals.   The interface voltage levels produced are true RS232 and RS-422 type signals.   These adapters find wide use in high-speed long distance serial communications, or to interface a PC with equipment that uses an RS-422 type input/output.   The adapters are powered by the host computer system's signal lines, the same way a "mouse" is powered.   For most installations this eliminates the need for an additional external power supply making the adapters an ideal choice for portable use.   Extended cable runs and/or terminated RS-422 connections require more current than the serial port power can provide.   The RS-422 connector can accept +6 to +9v regulated DC at 100 milliamps to provide the added power to the adapter.   The ANC-6022 allows the designer to apply composite video sync that is readable on the serial port's Data Carrier Detect (DCD, referred to as RLSD on some systems) or Ring Indicator (RI) line.   Our ANC-6090S/D PC internally mounted RS232/RS422 adapters use the same electronics as the ANC-6090.

Mechanical Specifications

Adapter case size:

• ANC-6022 = 2.2" X 2.1"
• ANC-6090 = 2.2" X 1.2"
• ANC-6090S/D = PC bracket mounted

Connectors:

• Female DB9 to PC
• Female DB9 to RS-422 equipment
• Video Input to ANC-9022 by BNC type connector

Electrical Specifications

• Power requirements = 12 ma for short cable, non-terminated applications 100 ma for long and/or terminated cable applications
• RS-422 output drive = short proof output, non-terminated operation to 150 feet, terminated operation with external power supply to 4000 feet.
• RS232 output drive = short proof output, under worse case conditions, 5v switching to exceed 3v EIA RS232 specification

ANC-6090/6022 Installation

  Turn off the personal computer and any other remote equipment before performing the adapter installation.   Never install or remove the adapter with the power applied to the PC or any of the attached equipment.   This could result in permanent damage to the adapter due to static discharge.

  Normally the adapter is plugged directly into the serial port male DB-9 jack on the back of the PC.   Be sure to look at the label on the adapter to identify and insure that the proper DB9 is plugged into the PC's serial jack.   The ANC-6022 would be difficult to plug in backward, but the ANC-6090 has female DB9s at both ends.   The user should screw the 2 mounting screws into the serial port's hex nuts for permanent installations to assure good long-term connection.   The ANC-6022 may require the mounting screws be used as both a DB-9 cable and coax cable will be installed at the opposite end and so will exert a cantilever force on the adapter.   The user of the ANC-9022 should be aware of this, and take the appropriate care with cable strain relieving.

  The adapter may be attached to a ribbon cable type extension from the PC to the Antona adapter.   This is sometimes useful when the space is limited behind the PC.   The ribbon cable extension should not exceed 3 feet.   A 12' shielded wire cable could also be used.   Remember that the signal is still RS-232C level leaving the computer and entering the adapter. Also note that if the designer is using a DB9 to DB25 adapter an A-B selector box or break-out box for testing, that all 9 pins should be connected through the adapter or test setup.   Power is drawn from the host system and pins 1 or 9 may be driving the host with the video sync information on the ANC-6022.

ANC-6090S/D Installation

  Turn off the personal computer and any other remote equipment before performing the adapter installation.   Never install or remove the adapter with the power applied to the PC or any of the attached equipment.   This could result in permanent damage to the adapter due to static discharge..

  Set the jumpers on the Antona adapter for the desired pin output configuration before installing the adapter inside the PC chassis - refer to ANC-6090 Tx - Rx Pin Reverse Jumpers for jumper options.   Remove the PC cover and remove a blank PC bracket near to the current serial I/O or motherboard based I/O connectors (these are 10-pin IDC ribbon cable type connectors).   You may need to rearrange the add on cards installed in the PC to obtain a functional placement for the Antona Adapter.   Locate the bracket or chassis mounted male DB-9 that the current RS232 serial port connects to the outside of the chassis from (at the other end of the 10-pin IDC ribbon cable connector).   Now remove the 2 hex nuts holding the DB-9 in place on the chassis or existing I/O card bracket and plug it into the female internal DB-9 on the Antona adapter (the non-bracket mounted DB-9 connector).   Plug the PC power supply patch cable that is attached to the Antona adapter (white nylon 4-pin Molex connector) into a suitable cable from the PC power supply.   That should complete the internal installation of a single channel ANC-6090S adapter, repeat the process for an ANC-6090D dual channel adapter.   If there is a DB-25 connector on the serial port you wish to use with the Antona adapter you can either use a DB-25 to DB-9 pin adapter or replace the internal DB-25 based cable with a DB-9 cable.   Note that there are several different wiring arrangements on motherboards and I/O cards for the connections from the 10-pin IDC to the DB type connectors.   We stock a 10-pin IDC to DB-9 cable with pin wiring that is compatible with most new motherboards.   You may need to verify the pinouts by inspecting the existing IDC to DB cable wiring.   Before replacing the cover to the PC, you may want to power up the system and do a quick test with the attached piece of RS422 equipment to insure proper operation.

Video vertical synchronization interrupt

  The ANC-9022 user may input and examine the video sync input to synchronize operation of command outputs to video editing equipment.   The interrupt may also be used for sync time delay, type of sync determination and presence of valid video sync.

1. Enable desired interrupts under software control in initialization.
2. When interrupt is requested, save all registers upon vectored entry.
3. Input modem status register to determine F1/F2 source of interrupt
4. Do interrupt service routine.
5. Restore all registers, re-enable software interrupts and return to main program.

Serial Port

Cable Termination

Adapter Jumper Options

  To open the enclosure hood use a small flat blade screwdriver and carefully pry the plastic latches on one side of the enclosure and gently separate the sides slightly (about .020").   Place a second flat blade screwdriver (or paper clip) between the separated sides of the enclosure to keep it from re-latching shut while you repeat the process on the two plastic latches on the other side of the hood.   The two sides of the hood should now come apart.   The computer side mounting screws are loose within the enclosure so be careful of these small parts.   To reassemble the enclosure hood back around the adapter electronics place the small screws back into position before closing the sides and double check that the hood sides are properly oriented.   The hood sides should easily reassemble if oriented properly.
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ANC-6090 Tx - Rx Pin Reverse Jumpers

  These 2 jumper sets, designated JP1 and JP2 on the ANC-6090 circuit board and schematic, allow the designer to swap the transmit and receive pairs on the RS-422 side of the adapter.   The configuration as shipped from Antona is set for 'master'.   This configuration is for the adapter acting as a controller to multimedia type equipment with an RS-422 SMPTE interface.   Figure 1 shows the jumper locations from the back or solder side of the ANC-6090 circuit board.   The user may move all four jumper shunts on the component side of the card from the 'vertical' controller configuration to the 'horizontal' receiver configuration.   All four jumpers must be changed to either all horizontal or all vertical for proper adapter operation.

Figure 1 - ANC-6090 jumper locations and configuration

ANC-6022 Tx - Rx Pin Reverse Jumpers

  These 2 jumper sets, designated JP1 and JP2 on the ANC-6022 circuit board and schematic, allow the designer to swap the transmit and receive pairs on the RS-422 side of the adapter.   The configuration as shipped from Antona is highlighted.   This configuration is for the adapter acting as a controller to multimedia type equipment with an RS-422 SMPTE interface.   Figure 2 shows the jumper locations from the back or solder side of the ANC-6022 circuit board.   The user may move all four jumper shunts on the component side of the card from the 'vertical' controller configuration to the 'horizontal' receiver configuration.   All four jumpers must be changed to either all horizontal or all vertical for proper adapter operation.

Figure 2 - ANC-6022 jumper locations and configuration

Tx - Rx Jumper Function Chart

Video vertical sync. interrupt jumper

  The ANC-6022 is capable of generating an interrupt on NTSC, PAL or SECAM RS-170 level sync input with both odd/even field or even field detection.   The Data Carrier Detect (DCD or RLSD) RS-232C input signal is used for edge detection of both the odd and even video field (as shipped).   It may be desired in some applications to receive interrupts for field 2 (even field) only detection.   The user may change the vertical sync decoder output destination from DCD to RI by cutting a shorting jumper between the "S" and "D" pads and "bridging" or soldering a bare piece of wire from the "S" to "R" pad.   The pads are located on the back side of the ANC-6022 adapter circuit board near the RS-232C (J1) connector.
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External connections to ANC-6022

DB9 RS-232C Signals

External connections to ANC-6090

DB9 to DB25 pin chart

  When using the Antona adapters on a DB25 type com port an adapter can be bought or built to translate the DB9 connector to accommodate the signals from a DB25 type connector using the table below.

RS422 connections to ANC-6090

  For normal or multimedia interfacing, this is the jumpering of JP1/2 as shipped.   Usually the user hand-wires a 9-pin cable assembly from the RS-422 piece of equipment to the Antona adapter.   The only difference between the master and server version is the jumper positions of JP1 and JP2 within the adapter.   The electronics are exactly the same, only the 2 transmit and 2 receive signal lines are exchanged.

DB9 RS-422 Signals for Master (Multimedia Controller)

DB9 RS-422 Signals for Server (Receive from Master)

Appendix A - Program listing

  The following short BASIC program will allow the designer to quickly verify the operation of the ANC-6022 video sync input.   It is assumed that the adapter is plugged into COM1: (use A=&H2FE for COM2:) with a suitable video input attached to the adapter's BNC connector input.

10 A=&H3FE
20 PRINT HEX$(INP(A) AND &H80))
30 GOTO 20


The D7 value should toggle with proper operation.

  A test driver is also available for download for use with either Antona adapter version. It is a windows based program and can control a Sony VTR.

Appendix B -Troubleshooting

Here are the most common sources of interfacing problems and tests you can make:

Loopback Test

  You can verify that the Antona adapter is working by doing a simple loop-back test using a male DB9 connector with pin 3 to 7 and pin 8 to 2. Use a simple terminal program to just test that characters sent out the com port are echoed back through the adapter. Make sure that your terminal program is turning on RTS and DTR to power the Antona adapter, and that the program is set to control the com port that the adapter is connected to. The adapter operation does not rely on baud rate, parity, stop bits - but the actual application program you are using with the adapter may (see PROGRAM OPERATION).

CABLING (most common problem)

  If one of the wires used is not connected or shorted, the whole interface will appear not to be working. Try using another cable or try the loopback test described above with the cable to verify operation. If you can not get the loopback test to work through the cable, it for sure will not work in your application.

  Take a look at the manual of the RS422 equipment that you are trying to control. Be sure that the pin definitions on the RS422 equipment tells you the signal names, not what they are suppose to connect to. This sounds simple, but unless you know which direction the pinouts are defined from, you will connect TX+ to TX+ which is incorrect. Make sure that you have the TX+ on the Antona adapter connected to the RC+ on the RS422 equipment and TX- connected to RC- (same for the signal coming back from the RS422 side - make sure that the Antona adapter's RC+ is connected to the TX+ and that the RC- is connected to the TX- on the RS422 side. Pin 5 on the Antona adapter's RS422 output side should be connected to the ground of the RS422 equipment.

  When shipped the Antona adapter is set for a SMPTE MASTER interface (connector pinouts are in the 6000 series manual for both MASTER and SLAVE mode, so be sure you are looking at the correct table). You may also want to open the Antona adapter up and verify the jumpers are set for the mode you desire. All 4 jumpers should be installed, they each represent one of the 4 signals being transmitted and received.

Powering

  Be sure that the RTS and DTR line on your RS232 interface are high - this is what powers the Antona adapter (like a mouse interface). Some portable computers just don't have enough power to run the adapter and/or the RS422 piece of equipment you are interfacing to may be over a long cable run and/or terminated with a 150 ohm resister (you can try disconnecting the termination resister also - some types of equipment give you a jumper option for the termination resister), so it might be necessary to externally power the adapter through the RS422 side by applying +5v to +12v DC power to pin 9 and ground to pin 5 or 1.

Program Operation

  The application program you are using may need some setup performed - selecting the com port, baud rate, parity, number of data bits, stop bits and setting the level of the handshaking signals (RTS and DTR lines high to power the adapter). Usually, for multimedia type interfaces, the baud rate is 38.4 Kbaud, Odd parity, 8 data bits and 1 stop bit. Here again, if the program is not setup right, the adapter will appear not to be working at all.

RS422 Equipment

  Try to verify the operation of the target RS422 equipment independent of the Antona adapter by using another setup - a different cable connected to another RS422 signal generating device would be the best. Using a different computer with the Antona adapter would also be a good test.

Now What?

  If none of the above seems to fix the problem, but the loopback test works, the adapter is working and you may now need to connect an oscilloscope up to examine and monitor the RS422 signals and the RS232 signals being generated by the Antona adapter with the plastic cover removed and running with your RS422 device and program. Refer to the schematic at in the ANC-6000 User's Manual you received with the adapter. It's easy to put a scope probe onto the tops of the 4 jumpers and verify that RS422 signals are coming and going to the adapter. Test the +power to the adapter by attaching a probe to the +lead of the 4.7uf capacitor near the +5v regulator (LM2936). Look for excess noise on any of the lines that might be fouling up the transmissions.

  If the loopback test does not work, connect a temporary external power supply up to the adapter by using a +9v battery and battery clip wired onto the loopback connector described above. Each adapter is tested prior to shipment with every bit combination of character transmitted and received at 38.4 Kbaud, but like everything, occasionally they can go bad. Of the hundreds we have shipped, there have been maybe 10 or so that arrived non-operational. Damaged in shipping or infant component burnout. We do warranty our adapters, so if it still does not work, call Antona and we will work out an adapter exchange.

Appendix C -Circuit Board Schematic

  The following page(s) contain the schematic for the series 6000 adapter.   The schematic and card artwork are copyright protected by Antona Corporation and are included only to aid the end user to configure the adapter or for competent technical service personnel to use in maintenance or repair.

-The schematics are included with purchase of the product.-

Related Links

• ANC-6090, RS232/RS422 Adapter
• ANC-6090S, Single Internal RS232/RS422 Adapter
• ANC-6090D, Dual Internal RS232/RS422 Adapter
• ANC-6023, RS232/RS422 Adapter with Video Sync Interrupt Generation
• Sony VTR Controller v3.02 for Windows
• Adobe PDF download of this manual
• Pricing for RS232/RS422 Adapters
• Contact Antona

Updated 08/15/09 16:00

Copyright © 1994-2009 Antona Corporation, L.A., CA., U. S. A.