B&B Electronics 232DRIO User Manual

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232DRIO-0308 Manual 
17 
B&B Electronics  --  PO Box 1040  --  Ottawa, IL  61350 
PH (815) 433-5100  --  FAX (815) 433-5104
 
 
Figure 4.4 - Isolated Mechanical Input 
 
 
Relay Outputs 
 
 
Relay outputs are used to turn external devices on or off.  Relay 
outputs are CMOS/TTL compatible and can also operate between 0-
24Vdc and 0-115Vac.  Outputs can be used to control solid state 
output modules, CMOS and TTL logic circuits.  Caution must be 
taken not to exceed the power capability of the outputs.  Refer to the 
output specifications in Chapter 1. 
 
Setting an output line to a "1" forces the output HIGH, and setting 
an output line to a "0" forces the output LOW.  Both relays are de-
energized at factory default settings. 
 
NOTE:  The relay circuits are not UL® approved for 120 Vac @ 10A 
or 30 Vdc @ 8A (resistive) maximum line service in regards to 
contact ratings.  However, the printed circuit traces were followed 
using UL standards (UL #1950) for minimum width and separation.  
For the previous reason and safety concerns, we recommend a 
maximum continuous rating of 8 amperes.  In conclusion, the 
voltage should still comply with the rated relay contact voltage of 120 
Vac/30 Vdc max. but recommended @ 8A or lower.  
It is the customer’s responsibility to determine the ultimate 
safety and acceptability of our products.  Failure to stay within 
these specifications could result in damage to the unit and will 
void warranty. 
 
 
232DRIO
EXTERNAL CIRCUIT
5-30 Vdc/Vac
Opto Isolated Input