Dataforth SCM9B-A2000 Series 사용자 설명서 - 페이지 8

{카테고리_이름} Dataforth SCM9B-A2000 Series에 대한 사용자 설명서을 온라인으로 검색하거나 PDF를 다운로드하세요. Dataforth SCM9B-A2000 Series 8 페이지. Converter boxes

SCM9B-A1000 & SCM9B-A2000 USERS MANUAL 8

switch is labelled +1K, -1K and 220. Set the appropriate switch to the

"up" position to enable a resistor.

NOTE: The RS-485 IN +1K and -1K switches should be "up" when the

SCM9B-A1000 is used as a RS-232/RS-485 converter.

SCM9B-A2000 RS-485 TERMINATIONS

Proper biasing and termination resistors in the SCM9B-A2000 may be

enabled by using the internal jumpers contained in the SCM9B-A2000.

Figure 3 shows the location of the jumpers on the SCM9B-A2000 printed

circuit board. The jumpers are shown in the factory setting to enable a

resistor, insert a jumper into the jack position adjacent to the resistor

nomenclature written on the SCM9B-A2000 printed circuit board.

NOTE: The RS-485 IN +1K and -1K jumpers should be installed when

the SCM9B-A2000 is used as a RS-232/RS-485 converter.

FACTORY RS-485 TERMINATION SETTINGS

SCM9B-A1000: 300 BAUD, +1K, -1K on RS-485 IN & RS-485 OUT

connectors enabled, all other switches off.

SCM9B-A2000: 300 BAUD, +1K, -1K, on RS-485 IN & RS-485 OUT

enabled via internal jumpers, all other termination jumpers disabled.

Figure 3. SCM9B-A2000 jumper locations.