Specifications

CDA70 MODEM DESCRIPTION
19
2.8. Ports technical specifications
• RS232
Name of product RS232
Power supply Internal ....
Environment Operating temperature -20 .. +55 C
Storage temperature -20 .. +85 C
Standards Emission EN 55022/B
Immunity ETS 300 342
Safety EN 60950
RS232 specifications
(EN 1434)
Max. operating bus current 15 mA
Max. bit rate 230400 bps
Max. overvoltage ±30 V
Max. total cable length
(300Bd, 200nF/km)
20 m
• RS485
Name of product RS485
Power supply External 10,8 .. 15,6 V
Internal ....
Supply power Max. 30 W
Supply current Max. 250 mA
Environment Operating temperature -20 .. +55 C
Storage temperature -20 .. +85 C
Standards Emission EN 55022/B
Immunity ETS 300 342
Safety EN 60950
RS485 specifications
(EN 1434)
Max. devices (each 1,5 mA) 256
Max. bit rate 38400 bps
Overload detection 250 mA
Short circuit strength Permanent
Max. total cable length
(300Bd, 200nF/km)
1200 m
RS485 port power supply for CDA-70-U(V)-4M version
External or internal power supply of expansion port RS485 it is can evoke by wiring
of the jumper J3. If it is necessitated external power supply of module, it must be
disconnection jumper J3. Internal power supply is evoking of connection jumper J3. Jumpers
are placement them to a picture below. We recommended internal power supply only in the
event of, that it is not possible ensure external power supply. If it is choose internal power
supply, converter RS485 is not galvanic separated.
RS485 port power supply for CDA-70-U(V)-EM version
External or internal power supply of expansion port RS485 it is can evoke by wiring
of the jumpers SK7 and SK8. If it is necessitated external power supply of module, it must be
disconnection jumpers SK7 and SK8. Internal power supply is evoking of connection jumpers
SK7 and SK8. Jumpers are placement them to a picture below. We recommended internal
power supply only in the event of, that it is not possible ensure external power supply. If it is
choose internal power supply, converter RS485 is not galvanic separated