Model 485OP optically isolates and protects equipment and also acts as a
signal repeater to extend the range of RS-422/485 data lines another
4,000 feet (1,200m). On RS-485 circuits, it allows more than 32 nodes to
be used. It works on 2-wire or 4-wire systems. It can also join 4-wire
RS-422 with 2-wire RS-485 systems, simplifying the job and saving the
cost of another converter. A 12 VDC @ 300 mA power supply is included.
Model 232SPHI4 has 4000 volts of isolation — twice the rating of most
isolators — to protect RS-232 equipment from lightning strikes,
accidental high voltage shorts and ground loops. Model 9SPOP2 is a port
powered two-channel isolator with a 2500V protection level. Model 9POP4
offers 4 channels of isolation and requires a single external 12 VDC
power supply to power both sides, ideal for the low powered ports on
laptops and newer PCs.
485OP -- UL Recognized