Robust DataComm Isolated 3-way Hub/Repeater/Auto-Select Switch, DIN-Rail Mount, 9-36v dc Supply, Full 4 of 4 Ground Isolation, RS-232 port with DB9 connector, RS-485 ports with screw terminal blocks.
The rdc485ih allows connection of one RS-232 and two RS485 devices complete with full 4-port 2.5kv optical/galvanic isolation - including 3 isolated DC supplies. Each port is fully isolated (with floating ground) with reference to the other data ports and the power supply.
In a Master/Slave configuration (Mode 1), any data received on port C ("Master") is echoed out from both ports A and B ("Slaves"). In a hub configuration (Mode 2), any port can freely talk to the other two. Any data received on any port is echoed out the other two. Data received on either port A or B is only echoed to port C ("Master"). In Switch mode, only port B is allowed to talk to port C. When the external terminal (SWITCH) is pulled to ground, only port A is allowed to talk to port C.
The RS-485 ports can be field set for 2 or 4-wire (default) operation and includes options for line biasing and a 120-ohm internal termination. 500-watt voltage transient suppressor diodes protect the rdc485ih from normal mode surges, while full galvanic isolation protects the unit from common mode surges.
Isolation, industrial design, small size, DIN rail mount, user indication, and DC supply make the rdc485ih a very engineer-friendly device for your industrial data communication system.