Instruction/ maintenance manual of the product IC478A-M-R2 Black Box
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1 ASYNC 2 3 2 ↔ 422/485 CONVERTER FEDERAL COMMUNICATIONS COMMISSION AND CANADIAN DEPARTMENT OF COMMUNICATIONS RADIO FREQUENCY INTERFERENCE STATEMENTS This digital apparatus does not exceed the Class A limits for radio noise emission from digital apparatus set out in the Radio Interference Regulation of the Canadian Department of Communications.
2 ASYNC 232 ↔ 422/485 CONVERTER NORMAS OFICIALES MEXICANAS (NOM) ELECTRICAL SAFETY STATEMENT INSTRUCCIONES DE SEGURIDAD ..
3 ASYNC 2 3 2 ↔ 422/485 CONVERTER.
4 ASYNC 232 ↔ 422/485 CONVERTER Contents.
5 Data Rate Connectors Transmission Format Transmission Line Transmission Mode Range Control Signals Carrier Surge Protection RTS/CTS Delay MTBF Operating Temperature CHAPTER 1: Specifications 1.
6 ASYNC 232 ↔ 422/485 CONVERTER Humidity Altitude Power Size Shipping Weight.
7 CHAPTER 2: Introduction ↔ Section 4.4 2. Introduction.
8 ASYNC 232 ↔ 422/485 CONVERTER ↔ DCE DTE +RCV -G-XMT+ 3. Configuration DTE/DCE Switch Terminal Block.
9 3.1 Setting the DTE/DCE Switch ON 1 2 3 4 5 6 7 8 CHAPTER 3: Configuration DIP Switch S1.
10 ASYNC 232 ↔ 422/485 CONVERTER 3.2 DIP-Switch Configuration internally ON OFF ON 1 2 3 4 5 6 7 8.
11 CHAPTER 3: Configuration 3.2.1 DIP-S WITCH S ETTINGS Switch S1 Summary Table Position Function Factory Default S1-1* “Transmit Off” Impedance Off High Z S1-2* “Transmit Off” Impedance Off S1-3 RTS/CTS Delay On 8 msec.
12 ASYNC 232 ↔ 422/485 CONVERTER S1-4: Echo Mode S1-5: Carrier-Control Method NOTE Carrier is ON when RTS is asserted positive, and OFF only when RTS is driven to a negative voltage.
13 CHAPTER 3: Configuration 3.2.2 C ONFIGURATION S WITCH A PPLICATIONS Do not change switch settings until you have carefully read this manual. Typical Switch Applications Switch Settings Point-to-Point Multipoint 4W 4W HDX 2W 4W 2W “Xmt Off” Imp.
14 ASYNC 232 ↔ 422/485 CONVERTER 4.1 Connection to the RS-485 Interface must 4.1.1 4-W IRE C ONNECTION U SING THE DB25 (IC477A-X-R2 AND IC478A-X-R2) Converter RS-485 (530) Device Signal DB25 Pin DB25 Pin Signal XMTA 2................................
15 CHAPTER 4: Installation 2) It is not necessary that the RS-485 device adhere to the RS-530 standard. However, you must make sure that the signals, polarities, and pairing of your connection conform to this table.
16 ASYNC 232 ↔ 422/485 CONVERTER 5. the other pair of wires NOTE Positive and negative are relative terms and may not always have the same relationship for all RS-422 or RS-485 devices (see the previous note regarding “flipping the leads”). Converter RS-485 Device XMT+ .
17 8. 9. +RCV -G-XMT+ +RCV -G-XMT+ +RCV -G-XMT+ CHAPTER 4: Installation.
18 ASYNC 232 ↔ 422/485 CONVERTER 10. 11. 4.1.3 2-W IRE C ONNECTION only the transmit (XMT) pair Converter Signal RS-485 Signal XMT+ .................
19 CHAPTER 4: Installation 4.2 Connection to the RS-232 Interface NOTE If you must use a cable to connect the Converter to the RS-232 device, make sure it is a straight-through cable of the shortest possible length. We recommend no more than 6 ft. (1.
20 ASYNC 232 ↔ 422/485 CONVERTER 4.4 Operation data.
21 APPENDIX A: RS-232C Pin Configurations ST ANDARD “DTE” SETTING DIRECTION DIRECTION From Converter Data T erm. Ready (DTR) - 20 1- (FG) Frame Ground 2- (TD) T ransmit Data 3- RD) Receive Data 4-.
22 ASYNC 232 ↔ 422/485 CONVERTER Pin Number Pin Name Appendix B . 422/485 (530) Pin Configuration.
23 APPENDIX C: Self-Test Section 3.2.2 Appendix C. Self- T est.
1000 Park Drive • Lawrence, PA 15055-1018 • 724-746-5500 • Fax 724-746-0746 © Copyright 1998. Black Box Corporation. All rights reserved..
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If you already are a holder of Black Box IC478A-M-R2, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Black Box IC478A-M-R2.
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