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Documentation Number 232OPSDA1397 Manual 1
B&B Electronics -- PO Box 1040 -- Ottawa, IL 61350
PH (815) 433-5100 -- FAX (815) 433-5105
Chapter 1: Introduction
232OPSDA Features
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).
Figure 1.1: 232OPSDA Module