Black Box RS-485 user manual

User manual for the device Black Box RS-485

Device: Black Box RS-485
Category: Computer Hardware
Manufacturer: Black Box
Size: 0.18 MB
Added : 8/5/2014
Number of pages: 22
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Abstracts of contents
Summary of the content on the page No. 1

MARCH 2000
IC113C
IC175C
Dual Port RS-232/422/485 Serial Interface
CUSTOMER Order toll-free in the U.S. 24 hours, 7 A.M. Monday to midnight Friday: 877-877-BBOX
SUPPORT FREE technical support, 24 hours a day, 7 days a week: Call 724-746-5500 or fax 724-746-0746
INFORMATION Mail order: Black Box Corporation, 1000 Park Drive, Lawrence, PA 15055-1018
Web site: www.blackbox.com • E-mail: info@blackbox.com

Summary of the content on the page No. 2

FCC AND IC STATEMENTS, TRADEMARKS FEDERAL COMMUNICATIONS COMMISSION AND 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 J of Part

Summary of the content on the page No. 3

DUAL PORT RS-232↔ 422/485 SERIAL INTERFACE 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. 3. Todas las advertencias en el aparato eléctrico y en sus instrucciones de operación deben ser respetadas. 4. Todas las instrucciones de operación y uso deben

Summary of the content on the page No. 4

NOM STATEMENT 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 deben ser guiados de tal manera que no sean pisados ni pellizcados por objetos colocados sobre o contra ellos, poniendo particular atención a los contactos y receptáculos donde sa

Summary of the content on the page No. 5

DUAL PORT RS-232↔ 422/485 SERIAL INTERFACE Contents Chapter Page 1. Specifications...................................................................................................1 2. Introduction ....................................................................................................2 2.1 Overview..................................................................................................2 2.2 What’s Included................................................................

Summary of the content on the page No. 6

CHAPTER 1: Specifications 1. Specifications Protocol — Asynchronous Speed — IC113C: Up to 115.2 Kbps; IC175C: 460.8 kbps and higher Operation — RS-232 or RS-485/422, 2- or 4-wire (individually selectable on each port) Connectors — (2) DB9M Communications Chip — IC113C: 16550 UART; IC175C: 16950 UART MTBF — >150,000 hours MTTR — <0.25 hours Materials — Boards are solder mask over bare copper or tin nickel Operating Temperature — 32° to 122°F (0° to 50°C) Storage Temperature — -4° to 158°F (-20°

Summary of the content on the page No. 7

DUAL PORT RS-232↔ 422/485 SERIAL INTERFACE 2. Introduction 2.1 Overview If you need to operate RS-232, RS-422, or RS-485 devices from your PC, use the Dual Port RS-232/422/485 Serial Interface. Connect to any device that uses the RS-232 interface, such as modems, data-entry terminals, and plotters. This card allows you to configure two RS-232 ports, two RS-422/485 ports, or one of each. The Dual Port RS-232/422/485 also features greater maximum distance and allows multi-drop communications. Th

Summary of the content on the page No. 8

CHAPTER 2: Introduction 2.3 Features Listed below are the special features your Serial Interface offers. • Each port is independently addressable. • Eleven interrupt options, including AT interrupts, for simple integration into existing systems. • IRQs (2 [9], 3, 4, 5, 6, 7, 10, 11, 12, and 15) supported. • IRQs can be shared or individually set for each port. • Supports Interrupt Sharing—only one interrupt line required for multiple ports. • Supports any character set defined by binary notatio

Summary of the content on the page No. 9

DUAL PORT RS-232↔ 422/485 SERIAL INTERFACE 2.4 Technical Description The Dual Port RS-232/422/485 Serial Interface utilizes the same 16550 UART ® chip found in the IBM asynchronous adapter. This chip features programmable baud rate, data format, and interrupt control. Refer to the IBM Technical Reference for details on programming the chip. RS-232 The Dual Port RS-232/422/485 Serial Interface meets the RS-232C specifications and provides an asynchronous serial I/O port. This is the ® standard

Summary of the content on the page No. 10

CHAPTER 2: Introduction RS-485 RS-485 is backward-compatible with RS-422; however, it is optimized for multidrop applications. The output of the RS-422/485 driver is capable of being active (enabled) or tri-state (disabled). This capability allows multiple ports to be connected in a multidrop bus and selectively polled. Half-duplex two-wire communications are possible by connecting TX+ to RX+ and TX- to RX- in your cable connector. The enable to the driver is connected to the UART Request To Sen

Summary of the content on the page No. 11

DUAL PORT RS-232↔ 422/485 SERIAL INTERFACE 3. Address Selection NOTE Be sure to set the address selections and jumper options before installation. Each serial port on the Dual Port RS-232/422/485 Serial Interface occupies 8 consecutive I/O locations. DIP switch SW1 sets the base address for Port 1, and DIP switch SW2 sets the address for Port 2. Be careful when selecting the base address, since some selections conflict with existing PC ports. The following table shows several examples that usua

Summary of the content on the page No. 12

CHAPTER 4: Option Selection 4. Option Selection NOTE Be sure to set the address selections and jumper options before installation. The board contains several jumper straps for each port which must be set for proper operation. 4.1 Port Enable/Disable Each port on the Dual Port RS-232/422/485 can be enabled or disabled with switch position 8 on the DIP switch. The port is enabled with the switch ON (or closed) and disabled when OFF (or open). If any port is disabled, be sure to also disable the

Summary of the content on the page No. 13

DUAL PORT RS-232↔ 422/485 SERIAL INTERFACE E1 2/9 3 4 5 7 10 11 12 15 E2 2/9 3 4 5 7 10 11 12 15 Figure 4-1. Header E1 and E2 (IRQ selection). Any two or more ports can share a common IRQ by placing the jumpers on the same IRQ setting, and setting the appropriate selections at E9 and E10. Consult your particular software for IRQ selection. If no interrupt is desired, remove the jumper. NOTE IRQ 2 on AT class machines is not available. IRQ 9 is substituted in place of IRQ 2. To select IRQ 9, pla

Summary of the content on the page No. 14

CHAPTER 4: Option Selection Figure 4-2. Headers E9 and E10 in Normal Mode. Set jumpers to “N” for single interrupt mode. This setting is the normal setting for most applications. Set jumpers to “S” for shared interrupt mode for all ports sharing an IRQ except one. Set that port block for “M.” This provides the pull-down resistor circuit that makes sharing of IRQ’s possible. If you are using more than one Dual Port RS-232/422/485 Serial Interface or a compatible card in a bus, you should only ha

Summary of the content on the page No. 15

DUAL PORT RS-232↔ 422/485 SERIAL INTERFACE 5 4 3 2 1 9 8 7 6 Figure 4-3. DB9 Handshake Loopback connections for RS-232 (shown from rear or cable side of connector). 4.3 RS-422/485 Interface Options To select the RS-422/485 mode of operation, install DIP shunts in the sockets found at E6 and E7. E6 sets Port 1 and E7 sets Port 2. Figure 4-4 shows Headers E3 and E4. Position “A” determines whether the RS-485 driver is enabled by the UART signal Request To Send (RTS) or always enabled. With the

Summary of the content on the page No. 16

CHAPTER 4: Option Selection Figure 4-4. Headers E3 and E4, RS-485 Enable/Ground Selection. 4.4 Line Termination Typically each end of the RS-422/485 bus must have line-terminating resistors. A 100-ohm resistor is across each RS-422/485 input, and a 1K-ohm pull-up/pull-down combination biases the receiver inputs. If more than two RS-485 nodes are configured in a multidrop network, only the nodes at each end of the bus should have the 100-ohm resistors installed. 11 A B C

Summary of the content on the page No. 17

DUAL PORT RS-232↔ 422/485 SERIAL INTERFACE 5. Installation The Dual Port RS-232/422/485 can be installed in any of the PC expansion ® slots, except J8 on the original IBM XT and Portable. IMPORTANT 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 WINDOWS 3.1X Please refer to th

Summary of the content on the page No. 18

CHAPTER 5: Installation 5.2 Hardware Installation The ISA Card can be installed in any of the PC expansion slots. The Card contains several jumper straps for each port that you must set for proper operation. 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. Replace the screw. 6. Replace the cover. 7. Connect the po

Summary of the content on the page No. 19

DUAL PORT RS-232↔ 422/485 SERIAL INTERFACE Appendix: Circuit-Board Design 14 PORT2 422/485 PORT 1 RS-232 PORT 1 PORT1 422/485 PORT 2 PORT1 PORT1 PORT2 RS-232 PORT 2 PORT2 C1 C1 C5 V1 U4 U5 SW1 R1 U1 C2 C3 U2 SW2 R2 P6 P2 C6 E3 E1 E2 U3 PORT2 PORT1 RP1 PORT2 E9 E10 R7 2 2 A D1 R3 D2 R4 R4 R5 3 3 B 4 4 C 5 5 6 6 A 10 10 B R6 11 11 C 12 12 U6 U7 E4 15 15 PORT1 C7 C8 RP4 RP2 RP3 U18 U11 U8 U9 R9 R8 P1 P3 C9 E6 E8 E7 E5 U12 U13 C10 J1 PORT 2 J1 PORT 1 1 5 1 5 6 9 6 9

Summary of the content on the page No. 20

APPENDIX: Circuit-Board Design 15 +5V +5V U1 U2 AEN A11 A8 2 A8 2 P1 P0 P0 20 20 A6 4 A6 4 P1 VDO +5V P1 VDO +5V A9 A4 6 A4 6 A22 P2 P2 P1 AEN 8 AEN 8 P3 P3 A8 A3 11 A3 11 19 98 SW1 19 98 SW2 P1 A23 P4 P4 A5 13 P=Q A5 13 P=Q P5 P5 A7 A7 15 A7 15 P6 P6 P1 A24 A9 17 A9 17 P7 P7 A6 A25 P1 A5 15 SW1 2 3 15 SW2 2 3 Q0 Q0 P1 A26 5 5 Q1 Q1 13 SW1 4 7 13 SW2 4 7 A4 Q2 Q2 P1 A27 9 9 GND 1 GND 1 Q3 Q3 A3 11 SW1 6 12 P>Q 11 SW2 6 12 P>Q Q4 Q4 A28 P1 14 14 Q5 Q5 10 SW1 7 16 10 SW2 7 16 10 10 Q6 Q6 18 VSS GN


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