20Ma Current Loop - Addi-Data ADDICOM APCI-7800 Technical Description

APCI-7800

4.3.3 20mA current loop

PMTTY
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 basic board has a transfer rate of max. 115.2 kBd in its standard
delivery (with standard quartz). If you wish to transmit at 1MBaud, then the
basic board has to be configured again in our house.
1MBd configuration: Please consider that the divider factors for
programming the transfer rate do not comply with the PC standard anymore.
The 1M Bd 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.
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Technical data