Proface PS4800 - 19 Panel PC" - Manual (Page 130)

Hardware Modifications
130
COM Expansion Board Description
Overview
The figure shows the COM Expansion Board:
1 LED
2 Switch
A terminating resistor for the serial interface is already integrated on the interface
module. There is a switch to connect or disconnect the terminating resistor, but the
Industrial Personal Computer unit needs to be opened in order to reach it. An active
terminating resistor is indicated by a yellow LED.
Serial Interface
The serial interface of the COM Expansion Board is a combined RS-232C/RS-
422/RS-485 interface with D-SUB 9 pin connector.
The operating mode (RS-232C/RS-422/RS-485) is selected automatically,
depending on the electrical connection. The serial interface and COM Expansion
Board use a different pin assignment for RS-232C communication.
When using the COM Expansion Board for RS-232C communication, pins 1, 4, 6
and 9 are not connected to anything.
The table provides the technical data of the serial interface:
Element Characteristics
Amount 1
Type RS232/422/485, modem-capable, electrically isolated
UART 16550-compatible, 16-byte FIFO
Transfer Rate RS232 Maximum 115 kbps with cable length
 10 m
Maximum 64 kbps with cable length
 15 m
Transfer Rate RS422/485 Maximum 115 kbps with cable length
 1200 m
Power Consumption 1 W
Connection D-sub 9 pin, plug
Ambient Temperature:
Operation
Storage
Transport
0...55
C (32...131 F)
–20...60
C (–4...140 F)
–20...60
C (–45...140 F)
Relative Humidity:
Operation
Storage
Transport
5...90 %, non-condensing
5...90 %, non-condensing
5...90 %, non-condensing
Weight 35 g (1.23 oz)