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Discription:
The RS232/RS485 converter allows the user to interface any device using an RS232 serial link to an RS485 link.
The converter is designed to work with the RMV ELECTRONICS Inc. multi purpose I/O-485 line of data acquisition and control boards.
The converters are not optoisolated since optoisolation for each station is provided in the I/O-485 boards. They can also be used back to back thus providing an RS232/RS485/RS232 link. In this way, two computers or devices using a standard RS232 serial port can communicate with each other at a maximum of 115,200 baud over a distance of 4000 feet, something impossible to achieve using an ordinary RS232 link.
One interesting application using two RS232/RS485 converters back to back is when a computer needs to be connected to an I/O-232 board at a distance longer than usual.
Features:
| Serial Interface |
High speed serial port interface from 9600 to
230400 baud. |
| Serial Port Connection |
Three wire connection (Rx,Tx,GND) |
Digital Lines
|
29 digital I/O arranged into three 8 bit general
purpose ports (PA, PB, PC) and a 5 bit I/O port (PD). Each pin
individually configurable as input or output. SPI port (PS)
also available. |
A/D Sampling rate
|
20 to 2,500 samples/sec. |
PWM
|
Pulse rate from 15 Hz to 15 kHz with variable
duty cycle. 24 bit output pulse counter up to 16 million. |
Resistance
|
500 Ohms to 10 MOhms |
Capacitance
|
100pF to 10µF |
Period
|
Measurement of period from 65µS to 100mS. Minimum
signal frequency 10 Hz, maximum 15 KHz. On-board pulse clipper
allows use with AC signals from 500 mV rms to 5 V rms. |
Stepper Control
|
Step speeds from 16 steps/sec to 8,500 steps/sec.
Linear acceleration and deceleration between 0 to 255 steps/sec2.
24 bit position/stepping register. 4 output signals (pulse,
direction, pause, trigger) for full (biphasic and monophasic)
and half step modes. Steps to go feature between 1 to 8 million
steps |
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