Express Systems will have an EARLY CLOSING Thursday, June 19th, 2025 and will be CLOSED June 20th, 2025 in observance of Juneteenth. We will resume regular business hours Monday, June 23rd, 2025 at 9:00am EST.
Serial cards deliver reliable, cost-effective and high serial port expansion; multiple form factors are available. Serial cards will enable you to easily add RS232, RS422, RS485 serial or parallel ports to your PC or server.