GeoVision RS232 for RS485 adapterkort med og medfølgende kabler

Moxa 8-32 port ISA RS232 intelligent seriellkort med DB25F-porter

8-CH timers/counters
2-CH cascaded 32-bit timer with 1 MHz base clock
On-board multiple base clocks ranging from 100 kHz to 2 MHz
External gate control and clock inputs for each counter
Inverted gate signals for 4-CH synchronized frequency measurement
Multiple interrupt sources from counter outputs, timer outputs and external interrupt inputs

Dobbel RS422/485-modul, Axiom AX20445B