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Black Box IC171C - page 1
CUSTOMER SUPPORT INFORMATION Order toll-free in the U.S. 24 hours, 7 A.M. Monday to midnight Friday: 877-877-BBOX FREE technical support, 24 hours a day, 7 days a week: Call 724-746-5500 or fax 724-746-0746 Mail order: Black Box Corporation , 1000 Park Drive, Lawrence, PA 15055-1018 Web site: www.blackbox.com • E-mail: info@blackbox.com MARCH 200 ...
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Black Box IC171C - page 2
RS422/485 SERIAL INTERF ACE PLUS FEDERAL COMMUNICA TIONS COMMISSION AND INDUSTR Y CANADA RADIO FREQUENCY INTERFERENCE ST A TEMENTS 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 commun ...
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Black Box IC171C - page 3
RS422/485 SERIAL INTERF ACE PLUS NORMAS OFICIALES MEXICANAS (NOM) ELECTRICAL SAFETY ST A TEMENT 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. 3. Todas la ...
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Black Box IC171C - page 4
RS422/485 SERIAL INTERF ACE PLUS 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. 12. Precaución debe ser tomada de tal manera que la tierra fisica y la polarización del equipo no sea eliminada. 13. Los cables de la fuente de poder debe ...
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Black Box IC171C - page 5
RS422/485 SERIAL INTERF ACE PLUS Contents Chapter Page 1. Specifications....................................................................................................1 2. Introduction .....................................................................................................2 2.1 Overview ............................................ ...
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Black Box IC171C - page 6
1 CHAPTER 1: Specifications Number of Ports — Single RS-485/422 Speed — IC050C: 115.2 Kbps; IC171C: 460.8 kbps and higher RS-485 Operation — 2- or 4-wire Connectors — DB25P Maximum Distance — Up to 5000 ft. (1524 m) Communications Chip — IC050C: 16550 UART; IC171C: 16950 UART MTBF — >150,000 hours MTTR — <0.25 hours Materials ...
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Black Box IC171C - page 7
2 RS422/485 SERIAL INTERF ACE PLUS 2.1 Overview The RS422/485 Serial Interface Plus is an easy-to-use RS-485 interface for your PC. It incorporates unique hardware circuitry that enables the RS-485 interface to appear to be an RS-232 interface, requiring no additional software drivers. Previous RS-485 interfaces required the software to “turn on? ...
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Black Box IC171C - page 8
3 CHAPTER 2: Introduction 2.3 Features Listed below are the special features your Serial Interface Plus offers. • Single-channel RS-485/422 adapter for Windows, OS/2, Windows NT, and DOS communications. • Addressable as COM1: through COM4: or twelve other pre-selected address options. • Automatic RS-485 protocol control allows card to appear ...
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Black Box IC171C - page 9
4 RS422/485 SERIAL INTERF ACE PLUS RS-530 and RS-449 RS-530 and RS-449 (EIA-530 and EIA-449) are similar to RS-422 and RS-485 in the fact that they are differential interfaces, but these two standards provide a specified pin-out that defines a full set of modem control signals that can be used for regulating flow control and line status. RS-449 is ...
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Black Box IC171C - page 10
5 CHAPTER 2: Introduction This interface is ideal for multi-drop or network environments. The RS-485 tri-state driver (not dual-state) will allow the electrical presence of the driver to be removed from the line. The driver is in a tri-state or high-impedance condition when not active. Only one driver may be active at a time and the other driver(s) ...
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Black Box IC171C - page 11
6 RS422/485 SERIAL INTERF ACE PLUS NOTE Be sure to set the address selections and jumper options before installation. The RS422/485 Serial Interface Plus occupies 8 consecutive I/O locations, and looks to the PC as a standard serial port. DIP switch SW1 sets the port address options. Be careful when selecting the port address, since some selections ...
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Black Box IC171C - page 12
7 CHAPTER 3: Address Selection Figure 3-1. DIP Switch SW1. Address 3F8 Hex. 1 2 3 4 ON OFF ABCD ...
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Black Box IC171C - page 13
8 RS422/485 SERIAL INTERF ACE PLUS NOTE Be sure to set the address selections and jumper options before installation. The RS422/485 Serial Interface Plus contains several jumpers that must be set for proper operation. E1: This header selects the interrupt request for the RS422/485 Serial Interface Plus. If COM1: is selected, this jumper must be on ...
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Black Box IC171C - page 14
9 CHAPTER 4: Option Selection Figure 4-2. Header E1 Optional Windows 3.1 Configuration. IRQ 10 selected. (Refer to Chapter 6 for more infor mation.) NOTE IRQ 2 on AT class machines is not available. IRQ 9 is substituted in place of IRQ 2. To select IRQ 9, place the jumper on the IRQ 2 position. E2: “N” indicates the (N)ormal, single-interrupt-p ...
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Black Box IC171C - page 15
10 RS422/485 SERIAL INTERF ACE PLUS Figure 4-4. Header E2 in Shared Mode. Header E5 is used to control the RS-485 enable/disable functions for the driver circuit. One of the unique features of the RS422/485 Serial Interface Plus is its ability to be RS-485 compatible without the need for special software or drivers. This is especially useful in Win ...
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Black Box IC171C - page 16
11 CHAPTER 4: Option Selection Header E3 is used to control the RS-485 enable/disable functions for the receiver circuit. The RS-485 “Echo” is the result of connecting the board’s receiver inputs to the transmitter outputs. Every time a character is transmitted it is also received by the board. This can be beneficial if your software can hand ...
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Black Box IC171C - page 17
12 RS422/485 SERIAL INTERF ACE PLUS DIP shunt E4 selects the pin out for the DB25 connector P3. With the 5-position shunt in the EIA-530 mode, the RS422/485 Serial Interface Plus complies with the EIA-530 pinout with the following signals supported: Signal Name Pin # Mode GND Ground 7 RDB RX+ Receive Positive 16 Input RS-422 RDA RX Receive Negative ...
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Black Box IC171C - page 18
13 CHAPTER 4: Option Selection Signal Name Pin # Mode GND Ground 7 TDB TX+ Transmit Positive 24 Output RS-422 TDA TX- Transmit Negative 25 Output RS-422 RDB RX+ Receive Positive 12 Input RS-422 RDA RX- Receive Negative 13 Input RS-422 RS-530/422/485 Line T ermination Typically, each end of the RS-530/422/485 bus must have line-terminating resistors ...
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Black Box IC171C - page 19
14 RS422/485 SERIAL INTERF ACE PLUS Figure 4-11. DIP Switch SW2. 1 2 3 4 ON OFF 5 L L P P T ...
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Black Box IC171C - page 20
15 CHAPTER 5: Installation IMPOR T ANT You MUST set up the operating system BEFORE you physically install the Card. 5.1 Software Installation If you are installing an ISA adapter in DOS, OS/2 ® , or QNX, please refer to the appropriate directory on one of the Serial Utilities Disks for instructions. 5.1.1 W INDOWS 3.1 X Please refer to the /WINDOW ...
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Black Box IC171C - page 21
16 RS422/485 SERIAL INTERF ACE PLUS NOTE Be sure to set the address selections and jumper options before installation. 1. Turn off PC power. Disconnect the power cord. 2. Remove the PC case cover. 3. Locate an available slot and remove the blank metal slot cover. 4. Gently insert the Card into the slot. Make sure that the Card is seated properly. 5 ...
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Black Box IC171C - page 22
17 CHAPTER 6: Windows 3.1 Configuration To configure the RS422/485 Serial Interface Plus under Windows 3.1, open the “Control Panel,” which is typically found in the “Main” Program Group. Next, open the “Ports” selection under the Control Panel. Select the port you wish to configure. Once you have selected the port, click on the “Sett ...
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Black Box IC171C - page 23
18 RS422/485 SERIAL INTERF ACE PLUS The next step is to select the appropriate Baud Rate, Data Bits, Parity, Stop Bits, and Flow Control. If you wish to select an IRQ or address different from the default, click on the “Advanced” button. Advanced Settings for COM 3: Base I/O Port Address Interupt Request Line (IRQ): 03E8 10 OK Cancel Help Setti ...
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Black Box IC171C - page 24
19 CHAPTER 6: Windows 3.1 Configuration Select “OK” for all windows after you have made your selection. The following message should appear: If you wish to configure another COM Port setting, select the “Don’t Restart Now” button and repeat this procedure until you have configured all new ports. To make the changes take effect immediately ...
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Black Box IC171C - page 25
20 RS422/485 SERIAL INTERF ACE PLUS Computer does not recognize any COM ports, or the system is “dead” or non-responsive. How to identify the problem: Use the SSD.COM Program (found on your utility diskette). Solution: Identify all COM ports installed on you computer and address the RS422/485 Serial Interface Plus at a different address from th ...
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Black Box IC171C - page 26
21 When using Windows 3.1, only two ports at any time are functional. How to identify the problem: Verify that all ports have a separate interrupt, or if sharing interrupts, only one device is using the IRQ at a time. Solution: Change the IRQs so that each port has its own unique interrupt (the preferred setting) or close each port before trying to ...
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Black Box IC171C - page 27
22 RS422/485 SERIAL INTERF ACE PLUS The RS422/485 Serial Interface Plus is setup to use the A T interrupts, but there’ s no interrupt response. How to identify the problem: Verify that the interrupt jumpers are correctly set. Verify that the card is inserted into a 16-bit or AT slot. Solution: Use the program SLT (found on your utility diskette) ...
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Black Box IC171C - page 28
23 7.1 Calling Black Box If you determine that your RS422/485 Serial Interface Plus is malfunctioning, do not attempt to alter or repair the unit. It contains no user-serviceable parts. Contact Black Box Technical Support at 724-746-5500. Before you do, make a record of the history of the problem. We will be able to provide more efficient and accur ...
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Black Box IC171C - page 29
24 RS422/485 SERIAL INTERF ACE PLUS SW2 C3 U4 74193 C2 Y1 U3 74193 U2 C1 SLS08-22V10 U1 74LS74 U6 C5 SW1 A T PPL L R1 BCD RP1 1 AUTO RTS 422 E3 RX R2 75173 U8 C7 R4 R3 R18 R6 R5 14 1 NS M E2 D1 C9 U5 C4 E1 2 3 4 5 7 10 11 12 15 P2 P1 SLS07-22V10 C6 74LS245 U7 25 13 R14 R7 R8 R9 R10 R1 1 R12 R13 E1A- 530 S10- 485 R17 R16 TX C8 R15 E4 AUTO RTS 422 E5 ...
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Black Box IC171C - page 30
1000 Park Drive • Lawrence, PA 15055-1018 • 724-746-5500 • Fax 724-746-0746 © Copyright 2000. Black Box Corporation. All rights reserved. ...
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