Micro Technic RS422, RS485 Precautions To Esd, Setting The I/O Address, Setting The Baud Rate

Users Manual & Installation Guide

PV- SERIES 4-PORTRS232/RS422/RS485

INSTALLATION GUIDE

Please refer to the schematic outline on page 5.

PRECAUTIONS TO ESD

Please note, that the Micronix PV modules must be handled with respect to ESD (Electrostatic Discharge). Electrostatic Discharge to the PV modules must be avoided.

Before removing the module from the protection bag, the user must be discharged using a grounded wrist ribbon.

SETTING THE I/O ADDRESS

The I/O address for channel A through D is set by the corresponding rotary-switch.

The individual positions are printed on the PCB.

EXAMPLE

Setting channel A to I/O address 2F8, turn rotary-switch labelled "A" to position "7".

SETTING THE INTERRUPT NUMBER (INDIVIDUALLY)

The IRQ number for channel A through D, is set by the corresponding pin column array. The individual positions are printed on the PCB.

EXAMPLE

See IRQ select page 6.

SETTING THE INTERRUPT NUMBER (SHARED)

If shared interrupt is used, the IRQ number for all four channels will be the same.

EXAMPLE

See shared IRQ settings page 7.

SETTING THE BAUD RATE

The baud rate is set by the software application. Each port is compatible to a normal PC COM-port and should be accessed accordingly. Operating systems and standard software applications have utilities for that.

For more sophisticated programming and specific control of handshake signals, please refer to a 16C550 manual. This manual can be ordered from a National Semiconductor representative.

HIGH SPEED-VERSIONS: BAUD RATE NOTICE

The actual baud rate will be 4 times the baud rate set by the software.

5V ONLY VERSIONS (5V):

These versions do not require +/-12V from the PC/104 bus.

Page 4 of 7