Sealevel Systems

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ISA Asynchronous Serial I/O

3055 1-port RS-422, RS-485 Serial Interface
3083 2-port RS-232, RS-422, RS-485 Serial Interface
3087 2-port RS-232, RS-422, RS-485 Serial Interface
3088 2-port RS-232 Serial Interface
3089 2-port RS-422, RS-485 Serial Interface
3189 2-port RS-422, RS-485 Isolated Serial Interface
3405 4-port RS-232 Serial Interface
3440 4-port RS-422, RS-485 Serial Interface
3420 8-port RS-232 Serial Interface


ISA Synchronous Serial I/O

4021 1-port RS-232, V.35 High-Speed Serial Interface (uses Z85230)
4061 1-port RS-232, RS-422, RS-485, RS-530 High-Speed Serial Interface (uses Z85230)
5011 1-port RS-232, RS-422, RS-485, RS-530, V.35 High-Speed Serial Interface (uses Z16C32)
4010 2-port RS-232 High-Speed Serial Interface (uses Z85230)
4111 2-port RS-422, RS-485, RS-530 High-Speed Serial Interface (uses Z85230)


ISA Digital I/O

3093 16 Reed Relay Output / 16 Isolated Input Digital Interface
3094 16 Optically Isolated Input Digital Interface
3095 16 Reed Relay Output Digital Interface
3096 8 Reed Relay Output / 8 Isolated Input Digital Interface
3098 32 Switched Relay Output Digital Interface
4030 48 Channel TTL Digital Interface


We Also Offer

  • Modifications including UART and oscillator upgrades
  • Extended temperature testing
  • Complete software drivers, utilities, and code samples
  • Custom I/O hardware and enclosure designs
  • Exceptional technical support


About Sealevel Systems, Inc.

Incorporated in 1986, Sealevel Systems manufactures I/O products to serve customers' serial and digital interface requirements. Currently offering over 200 standard products, Sealevel offers high reliability, long term availability, and a commitment to customer satisfaction that is demonstrated by ISO 9001:2000 Registration and the Lifetime Warranty that is standard with all Sealevel manufactured I/O products.


Contact Information

Sealevel Systems, Inc.
2779 Greenville Hwy
P.O. Box 830
Liberty, SC 29657 USA
Phone: (864) 843-4343
Fax: (864) 843-3067
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