8 Relay + 4 DI + Event Counter

The ADR2200  relay I/O interface allows control of 8 relay contact outputs, 4 contact or TTL inputs, and one  event counter via an RS232 or RS485 link.  The ADR2200 can effectively convert  a standard PC to a powerful  PLC ( programmable logic controller ). This low-cost serial relay contact  interface is easy to use with Visual Basic, Basic, C, Labview, Testpoint, or other high level languages that allow access to a serial port. The ADR2000 series of data acquisition interfaces are daisy chainable up to ten units. All ADR2000 series boards contain RS232 to RS485 convertors.