4.3.3 20Ma Current Loop - Addi-Data ADDICOM APCI-7300 Technical Description

1-port/2-port/4-port serial interfaces
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APCI-7xxx

4.3.3 20mA current loop

Max. Baudrate:........................................ 19.2 kBaud
Transorb diodes: ..................................... 400 W
Absorption power ................................... 1ms
Creeping distance: .................................. 3.2 mm
Test voltage: ............................................ 1000 VAC
Load: ....................................................... 500 Ω
Voltage reversal and short-circuit protection through
Transorb diodes
The standard basic board with SI modules (PMxxx): The basic board has
a transfer rate of max. 115.2 kBd in its standard delivery (with standard
quartz).
Basic board with MX modules and 1MBd configuration (Option): Please
check if the quartz frequency is correctly set in ADDIREG or in the device
manager of your operating system. See 6.1 for Windows NT and 6.2 for
Windows XP/2000/98.
The 1MBaud transfer rate can only be programmed with the device drivers
delivered with the board.
RS 485: transfer at 1 MBaud only works when the transmitter is controlled
through DTR, RTS or data bit.
PMTTY
MXTTY
19.2 kBaud
400 W
3.2 mm
1000 VAC
500 Ω
Technical data
17

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