Addi-Data ADDICOM PA 7400 Series Technical Description page 16

Technical description
Serial ports:
Modes:
Serial port 1: ................................................... RS232, RS422, RS485 or
Serial port 2: ................................................... RS422, RS485 or
Addressing: .................................................... COM1, COM2, COM3, COM4
Memory: ......................................................... UART with 16-byte FIFO buffer
Protocol: ........................................................ 5-, 6-, 7- or 8-bit character
Parity: ............................................................. Even, odd, none, mark and space
Transfer rates:
•
RS 232: ........................................................ max. 19200 Baud
•
RS 422/RS 485: ........................................... max. 112000 Baud
•
20 mA current loop: ..................................... max 19200 Baud
Load resistance :
20mA current loop: ........................................ ≤ 300 ohm
Overvoltage protection:
RS 422/RS 485: ........................................... Breakdown voltage = ± 6.5 V
•
20mA current loop: ...................................... Breakdown voltage = ± 26 V
•
Insulation voltage: .......................................... 1K VAC (RS 422/RS 485
1
Clamping voltage
2
Surge non repetitive reverse current
3
Peak Pulse Power
Chapter 4
20 mA current loop (active, passive)
20 mA current loop (active, passive)
selectable per jumper
or with each address through
DIP switches
1, 1 ½ or 2 stop bits
(only serial port 1)
= ± 11.3 V;
1)
VCL
2)
at Ipp = 35.4 A in 1 ms test
3)
Ppp = SURGE 300 W / 1 ms
All lines are protected
against short-circuit through
PTC resistors.
VCL = ± 41.5 V;
at Ipp = 9.6 A in the 1 ms test
Ppp = SURGE 400 W/1 ms
and 20 mA current loop)
PA 7400
7