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Summary of Contents for SeaLevel COMM+2
- Page 1 COMM+2 User Manual | 3083 © Sealevel Systems, Inc. 3083 Manual | SL9107 1/2023...
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Page 2: Table Of Contents
APPENDIX C – ELECTRICAL INTERFACE ......................16 APPENDIX D - ASYNCHRONOUS COMMUNICATIONS..................18 APPENDIX E – SILK SCREEN ..........................19 APPENDIX F – SCHEMATIC ..........................20 APPENDIX G – COMPLIANCE NOTICES ......................21 WARRANTY ................................ 22 © Sealevel Systems, Inc. 3083 Manual | SL9107 1/2023... -
Page 3: Introduction
Introduction Overview The COMM+2 provides the PC with two async serial ports, which can interface, to RS-232, RS-422, or RS- 485. Factory Default Settings The COMM+2 factory default settings are as follows: Port # Base Address Electrical Specification Port 1... -
Page 4: Before You Get Started
Before You Get Started What’s Included The COMM+2 is shipped with the following items. If any of these items are missing or damaged, contact the supplier. COMM+2 Serial I/O Adapter • Advisory Conventions Warning The highest level of importance used to stress a condition where damage could result to the product, or the user could suffer serious injury. -
Page 5: Card Setup
The COMM+2 contains several jumper straps, which must be set for proper operation. Address Selection Each port on the COMM+2 occupies 8 consecutive I/O locations. A DIP-switch is used to set the base address for these locations. Be careful when selecting the base address as some selections conflict with existing ports. - Page 6 Port Enable / Disable Each port on the COMM+2 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 disable the interrupt request for that port by removing the IRQ jumper.
- Page 7 COM3: and COM4: to share interrupts with COM1: and COM2: (see note on E6) or in an OEM configuration to support a specific software application. Port 1 Port 2 Single Interrupt Mode Port 1 Port 2 Shared Interrupt Mode Figure 4 - Header E5, IRQ Mode Selection © Sealevel Systems, Inc. 3083 Manual | SL9107 1/2023...
- Page 8 A | B A | B A | B E1 & E3 E2 & E4 E1 & E3 E2 & E4 E1 & E3 E2 & E4 Figure 6 - Interface Option Examples © Sealevel Systems, Inc. 3083 Manual | SL9107 1/2023...
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Page 9: Installation
Installation Do not install the hardware until the software has been fully installed The COMM+2 can be installed in any ISA PC expansion slot. The COMM+2 contains several jumper straps for each port, which must be set for proper operation. - Page 10 To avoid accidental damage, be sure to follow the proper ESD procedures by grounding yourself and the board. Other Operating Systems Refer to the appropriate section of the Serial Utilities Software. © Sealevel Systems, Inc. 3083 Manual | SL9107 1/2023...
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Page 11: Technical Description
Technical Description The COMM+2 adapter utilizes the 16550 UART chip. This chip features programmable baud rate, data format, interrupt control and has a 16 byte transmit and receive FIFO. Features Full independent operation of ports allowing two ports RS-232, two ports RS-422/485 or one port •... - Page 12 RTS to CTS and RI. Also, connect DCD to DTR and DSR. Terminating these pins, if not used, will help insure you get the best performance from your adapter. © Sealevel Systems, Inc. 3083 Manual | SL9107 1/2023...
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Page 13: Specifications
10 to 90% R.H. Non-Condensing Manufacturing All Sealevel Systems Printed Circuit boards are built to UL 94V0 rating and are 100% electrically tested. These printed circuit boards are solder mask over bare copper or solder mask over tin nickel. Power Consumption... -
Page 14: Appendix A - Troubleshooting
No two adapters can occupy the same I/O address. Make sure the Sealevel Systems adapter is using a unique IRQ The IRQ is typically selected via an on-board header block. Refer to the section on Card Setup for help in choosing an I/O address and IRQ. -
Page 15: Appendix B - How To Get Assistance
If possible, please have the adapter installed in a computer ready to run diagnostics. 3. Sealevel Systems maintains a Home page on the Internet. Our home page address is www.sealevel.com. The latest software updates, and newest manuals are available via our FTP site that can be accessed from our home page. -
Page 16: Appendix C - Electrical Interface
+12 volts (usually +3 to +10 volts) represents a binary 0 (space) and a -12 volt (-3 to -10 volts) denotes a binary 1 (mark). The RS-232 and the EIA/TIA-574 specification define two types of interface circuits, Data Terminal Equipment (DTE) and Data Circuit-Terminating Equipment (DCE). The Sealevel Systems adapter is a DTE interface. RS-422 The RS-422 specification defines the electrical characteristics of balanced voltage digital interface circuits. - Page 17 RS-485 does not define a connector pin-out or a set of modem control signals. RS-485 does not define a physical connector. Now click the “Use specific IP address” radio button and type the IP address of the device in the text box. See below. © Sealevel Systems, Inc. 3083 Manual | SL9107 1/2023...
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Page 18: Appendix D - Asynchronous Communications
The communication parameters are baud rate, parity, number of data bits per character, and stop bits (i.e. 9600,N,8,1). © Sealevel Systems, Inc. 3083 Manual | SL9107 1/2023... -
Page 19: Appendix E - Silk Screen
Appendix E – Silk Screen © Sealevel Systems, Inc. 3083 Manual | SL9107 1/2023... -
Page 20: Appendix F - Schematic
Appendix F – Schematic © Sealevel Systems, Inc. 3083 Manual | SL9107 1/2023... -
Page 21: Appendix G - Compliance Notices
Always use cabling provided with this product if possible. If no cable is provided or if an alternate cable is required, use high quality shielded cabling to maintain compliance with FCC/EMC directives. © Sealevel Systems, Inc. 3083 Manual | SL9107 1/2023... -
Page 22: Warranty
In the event of failure, Sealevel will repair or replace the product at Sealevel's sole discretion. Failures resulting from misapplication or misuse of the Product, failure to adhere to any specifications or instructions, or failure resulting from neglect, abuse, accidents, or acts of nature are not covered under this warranty.