Chapter 5 _____________________________________________________________ Technical Data
VAISALA________________________________________________________________________ 17
CHAPTER 5
TECHNICAL DATA
This chapter provides the technical data of DXL421 modem.
Specifications
Table 4 Power Input
Property Description / Value
Supply voltage +5 to +30 VDC
Power consumption 0.09 W
Fuse 0.5A PTC
Transient protection Yes, transil diode
Reverse connect protection Yes
Connector 2-pos screw terminal
Indicator One green LED power on
Table 5 Serial RS-232 Interface
Property Description / Value
Topology RS-232C interface
Serial port speed 300 to 57600 baud
Connector 6-pos screw terminal
Indicators Three orange LEDs CD, TxD and RxD
Table 6 PSTN Interfase
Property Description / Value
Modem compatibility V.21 300 / 300 bps FSK, V.22 1200 / 1200
DPSK and V.23 1200 /1200 bps FSK.
2- or 4-wire, point-to-point or multi-point
Transient protection Yes, 350V surge arrester, PTC-fuses,
sidactor
Isolation 1500V
Connector 4-pos screw terminal
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General