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RS232 CONVERTER

Availability < 50 g
Bezel size 48 mm x 24 mm

The unit is a port powered two-channel (half-duplex) RS-485to RS-232 converter. It converts the balanced halfduplex RS-485signals to TD and RD RS-232 lines. The unit is powered from theRS-232 data and handshake lines whether the lines are high orlow. An external power supply can be connected to two terminalson the RS-485 connector if no handshake lines are available. Although the converter uses handshake lines to power itself, no handshaking is required to control the RS-485 driver.The RS-485 driver is automatically enabled during eachspacing state on the RS-232 side. During the marking or idlestate, the RS-485 driver is disabled and the data lines are held inthe marking state by the 4.7k ohm pull-up and pull-downresistors. The value of these resistors may need to be changedto a different value when termination is used in order to maintainthe proper DC bias during the idle state.

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