B&B Electronics 232DRIO User Manual

232DRIO-0308 Manual 

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The 232DRIO is a general purpose data acquistion controller that 

is connected to your computer’s RS-232 serial port.  The 232DRIO 
offers 1 opto-isolated input and 2 relay outputs.  With these features, 
the controller can be used to sense external ON/OFF conditions and 
to control a variety of devices. 
 

The relay outputs are CMOS/TTL compatible. The optically 

isolated AC/DC input are also CMOS/TTL compatible.  For 
maximum flexibility, both input and outputs are connected with 
internal screw type terminal blocks.  Three LEDs are provided to 
monitor the status of each of these. 
 

The 232DRIO connects to your computer’s RS-232 serial port 

through a DB-9F connector.  The unit communicates at a baud rate 
of 9600, 8 data bits, no parity, and 1 stop bit.  This unit can not be 
powered through the handshake lines because of the higher current 
requirement to drive the relays.  However, the unit may be powered 
by an external +12Vdc source brought in through the power pin, pin 
#9 of the serial port.  If the 232DRIO cannot be powered using the 
previous method, it may be powered with +12Vdc @ 100mA through 
the supplied terminal blocks.  Power supply is available.