Black Box IC183C - Manual

11 RS-422/485 SERIAL INTERFACE PLUS, 4-PORT 3. Card Setup The RS-422/485 Serial Interface Plus, 4-Port Card has several jumper strapswhich must be set for proper operation. 3.1 Address Selection Each port on the Card occupies eight consecutive I/O locations. A DIP switchis used to set the base addre...

12 RS-422/485 SERIAL INTERFACE PLUS, 4-PORT Table 3-1. Available Address Combinations. Switch 6 Switch 7 Switch 8 Port 1 Port 2 Port 3 Port 4 On On Off 3F8 2F8 3E8 2E8 On Off On 2F8 3E8 2E8 2E0 On Off Off 3E8 2E8 280 288 Off On On 500 508 510 518 Off On Off 580 588 590 598 Off Off On 1500 1508 1510 ...

13 RS-422/485 SERIAL INTERFACE PLUS, 4-PORT Table 3-2. Address Selection Table. Address lines A9 A8 A7 A6 A5 Address Selected 1 2 3 4 5 280-29F Off On Off On On 2A0-2BF Off On Off On Off 380-39F Off Off Off On On 1A0-1BF On Off Off On Off 2E0-2FF Off On Off Off Off Figure 3-1 shows the correlation b...

14 RS-422/485 SERIAL INTERFACE PLUS, 4-PORT Table 3-3. Port to Connector Table. Port # Connector Location Address Example (Base=2E0) 1 1 Base+0 2E0-2E7 2 2 Base+8 2E8-2EF 3 3 Base+16 2F0-2F7 4 4 Base+24 2F8-2FF 3.2 Jumper Selections For ease of configuration, the headers are grouped by port. Port 1 ...

15 RS-422/485 SERIAL INTERFACE PLUS, 4-PORT 3 4 5 6 7 9 10 11 12 15 Figure 3-2. Headers J1B – J4B, 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 J1A throughJ4A. Consult your particular software for...

18 RS-422/485 SERIAL INTERFACE PLUS, 4-PORT Figure 3-5. Headers J1D - J4D, RS-422. AT RT NE AT RT NE Figure 3-6. Headers J1D - J4D, RS-485 “Auto” Enabled, with “No Echo.” 3.6 Interface Mode Examples J1D – J4D

20 RS-422/485 SERIAL INTERFACE PLUS, 4-PORT Figure 3-9. Headers J1D - J4D, RS-485 “RTS” Enabled, with “Echo.” 3.7 Line Termination Typically, each end of the RS-485 bus must have line-terminating resistors(RS-422 terminates at the receive end only). A 120-ohm resistor is across eachRS-530/422/485 in...

24 RS-422/485 SERIAL INTERFACE PLUS, 4-PORT 4. Installation IMPORTANT You MUST set up the operating system BEFORE you physically installthe Card. 4.1 Software Installation If you are installing an ISA adapter in DOS, OS/2, or QNX, please refer to theappropriate directory on one of the Serial Utiliti...

25 RS-422/485 SERIAL INTERFACE PLUS, 4-PORT 4.2 Hardware Installation The RS-422/485 Serial Interface Plus Card can be installed in any of the PCexpansion slots. The Card contains several jumper straps for each port thatyou must set for proper operation. 1. Turn off PC power. Disconnect the power co...

28 RS-422/485 SERIAL INTERFACE PLUS, 4-PORT Appendix A: Connector Pin Assignments Table A-1. DB9 Pin Assignments. Signal Name Pin # Mode GND Ground 5 TX+ Transmit Data Positive 4 Output TX- Transmit Data Negative 3 Output RTS+ Request to Send Positive 6 Output RTS- Request to Send Negative 7 Output ...

30 RS-422/485 SERIAL INTERFACE PLUS, 4-PORT Appendix B: Board Layout C13 74LS244 U10 C17 74LS245 U16 RP4 RP3 C16 75174 U15 C15 75175 U14 C14 75174 U13 75175 U12 74HC04 U11 R17 J4E P P T L L R16 J3E P P T L L R15 J2E P P T L L R14 J1E P P T L L P3 SD837M-318 * JxE JUMPER SETTINGS * P= PULL UP/DOWN EN...

31 RS-422/485 SERIAL INTERFACE PLUS, 4-PORT Appendix C: Electrical Interface RS-422 The RS-422 specification defines the electrical characteristics of balanced-voltage digital interface circuits. RS-422 is a differential interface that definesvoltage levels and driver/receiver electrical specificati...