PIO-48 User Manual Part Number 4030 www.sealevel.com PO Box 830 Liberty, SC 29657 864.843.
Table of Contents INTRODUCTION......................................................................................................................... 1 OTHER SEALEVEL ISA DIGITAL I/O PRODUCTS .......................................................................... 1 BEFORE YOU GET STARTED................................................................................................. 2 WHAT’S INCLUDED .......................................................................................................
Introduction The PIO-48 part number 4030 digital I/O interface provides 48 channels of buffered drive digital I/O emulating 8255 mode zero. The PIO-48 can be utilized for a variety of control and automation applications including control and monitoring of TTL devices (e.g. LEDs, small solenoids, small relays) and interfacing to solid-state relay racks (SSRs) for high-power AC or DC loads. The PIO-48’s 48 digital I/O channels are accessed via two 50-pin header connectors with industry-standard pin out.
Before You Get Started What’s Included The PIO-48 is shipped with the following items. If any of these items is missing or damaged please contact Sealevel for replacement. PIO-48 Adapter Sealevel SeaI/O Software CD Optional Items Depending upon your application, you are likely to find one or more of the following items useful for interfacing the PIO-48 to real-world signals. All items can be purchased from our website (http://www.sealevel.com) or by calling (864) 8434343.
For high-current, high-voltage applications: IDC 50 to IDC 50 Pin Ribbon Cable (Part Number CA167) − 40” cable connects the PIO-48 to solid-state relay racks equipped with 50-pin header interface. IDC 50 to IDC 50 Pin Ribbon Cable (Part Number CA135) − 40” cable connects the PIO-48 to solid-state relay racks equipped with 50-pin edge connector. Solid-State Relay Racks: • Quad six position relay rack (Part Number PB24HQ) − Relay rack can accept up to six QSSRs for a total of 24 channels.
Card Setup The PIO-48 contains several jumper straps for each port that must be set for proper operation. Address Selection The PIO-48 occupies 8 consecutive I/O locations. Dip-switch SW1 sets the base address for the PIO-48. Be careful when selecting the base address as some selections conflict with existing PC ports. The following table shows several examples that usually do not cause a conflict.
Wait States The PIO-48 has the option of inserting one 500 nS wait state for each access. This may be required on certain machines with bus clocks in excess of 8 MHz. With the wide variety of machines available, no concrete rules exist concerning wait states. If the PIO-48 doesn't seem to be responding properly, try inserting a wait state. To enable wait state insertion, set position 8 of the dip-switch to "ON". To disable wait states, set position 8 "OFF".
Software Installation Windows 98/ME/2000/XP Installation 1. Start Windows. 2. Insert the Sealevel Systems CD in to your CD drive. 3. If ‘Auto-Start’ is enabled for this drive the software will automatically launch. Otherwise, point your browser to the ‘Index.htm’ on the root directory of the CD 4. Select ‘Install Software’. 5. Select the Part Number for your adapter from the listing. 6. Select ‘Windows 98/ME/2000/XP’.
Linux Installation Note: You MUST have "root" privileges to install the software and drivers. 1. Login as "root". 2. Mount the CDROM by typing: mount -t iso4860 /dev/hdc /cdrom Note Your cdrom may not be /dev/hdc it could be /dev/hda, /dev/hdb, /dev/hdd, or if you have a SCSI drive /dev/sda, /dev/sdb, /dev/sdc, etc. You may mount the CDROM to any location, the /cdrom is just a common example. 3. Next change to the directory where you mounted the CDROM: Ex.
Physical Installation The adapter can be installed in any 5V PCI expansion slot. Do not install the Adapter in the machine until the software has been fully installed. 1. Turn off PC power. Disconnect the power cord. 2. Remove the PC case cover. 3. Locate an available 5V PCI slot and remove the blank metal slot cover. 4. Gently insert the PCI adapter into the slot. Make sure that the adapter is seated properly. 5.
Digital I/O Interface The PIO-48’s 48 digital I/O channels are accessed via two industry-standard 50-pin header connectors. Each header provides 24 bits of digital I/O divided into three eight-bit ports. Each port may be individually configured via software command as input or output. 50-pin Header Connectors You will need to install the bracket assembly and cables to the PIO-48 prior to installing it in the PC.
Programming the PIO-48 Sealevel’s SeaI/O software is provided to assist in the development of reliable applications for the Sealevel Systems family of digital I/O adapters. Included on the SeaI/O CD are driver functions for use in accessing the I/O as well as helpful samples and utilities. Programming for Windows The SeaI/O API (Application Programmer Interface) provides a variety of useful high-level function calls implemented in a Windows dynamic link library (DLL).
Presetting an Output Port Each port has an output register associated with it. This register may be written and retains its value whether the port is configured as an input or an output. To preset the value of an output port the program should write to the port when it is configured as an input then configure it as an output. Writing the Outputs The outputs are active true. Writing a one (1) corresponds to 5V while writing a zero (0) corresponds to 0V, at the output.
I/O Control Word Each port may be configured as either Input or Output. This is accomplished by writing the correct Control Word (CW) to the proper register.
Electrical Characteristics The PIO-48 uses 74LS245 octal bi-directional transceivers to provide TTL input/output capabilities. Each bit is pulled to +5V through a 10K ohm pull-up resistor to insure each bit is at a known state when not driven. Specifications Inputs Logic High: Logic Low: Min 2VDC Max 0.8VDC Outputs Logic High: Logic Low: Min 2VDC @ 15 mA Max 0.
Example Circuits © Sealevel Systems, Inc.
Appendix A - Troubleshooting Following these simple steps can eliminate most common problems. 1. Install software first. After installing the software then proceed to adding the hardware. This places the required installation files in the correct locations. 2. Read this manual thoroughly before attempting to install the adapter in your system. 3. Use Device Manager under Windows to verify proper installation. 4.
Appendix B - How To Get Assistance Begin by reading through the Trouble Shooting Guide in Appendix A. If assistance is still needed please see below. When calling for technical assistance, please have your user manual and current adapter settings. If possible, please have the adapter installed in a computer ready to run diagnostics. Sealevel Systems provides an FAQ section on its web site. Please refer to this to answer many common questions. This section can be found at http://www.sealevel.com/faq.
Appendix C – Silk Screen – 4030 PCB 4.2" 6.1" © Sealevel Systems, Inc.
Appendix D - Compliance Notices Federal Communications Commission Statement FCC - This equipment has been tested and found to comply with the limits for Class A digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment.
Warranty Sealevel's commitment to providing the best I/O solutions is reflected in the Lifetime Warranty that is standard on all Sealevel manufactured products. We are able to offer this warranty due to our control of manufacturing quality and the historically high reliability of our products in the field. Sealevel products are designed and manufactured at its Liberty, South Carolina facility, allowing direct control over product development, production, burn-in and testing. Sealevel Systems, Inc.
