B&B Electronics 232OPSDA Manual Do Utilizador

Documentation Number 232OPSDA1397 Manual 

1 

 

Chapter 1: Introduction 

The 232OPSDA is an optically isolated data acquisition module 

that is connected to your computer’s RS-232 serial port. It provides 
2500V of optical isolation protection between the I/O and RS-232 
side of the module. The 232OPSDA offers six channels of 12-bit 
A/D, one digital input, and one digital output. The six A/D input 
channels can be used for a number of applications. One A/D 
channel can read a 4-20mA analog current, two buffered channels 
read voltages between 0 and 5V, two non-buffered channels read 
voltages between 0 and 5V, and one channel can read voltages 
between 0 and 10V. 
 

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

through a DB-25S (female) connector. The module automatically 
detects baud rates from 1,200 to 9,600. A data format of 8 data bits, 
1 stop bit, and no parity is used.  
 

The RS-232 side of the 232OPSDA is port powered. Power is 

drawn from RTS and DTR regardless of whether they are asserted 
HIGH or LOW.  In addition, an isolated external power supply is 
required to power the I/O side of the module. Both port-powering 
and the external power supply are required.  The 232OPSDA 
requires a power supply that produces 9-16VDC @ 10mA (not 
including power consumption of external devices).