DECODE PRM4 사용자 설명서 - 페이지 11
{카테고리_이름} DECODE PRM4에 대한 사용자 설명서을 온라인으로 검색하거나 PDF를 다운로드하세요. DECODE PRM4 20 페이지. 868mhz
페이지 인쇄3.5 Jumpers
The jumpers are located on the printed circuit board of the PRM4 device. By altering
the state of the jumpers, the serial interface on DB9 port can be set.
Serial interface
RS-232C
RS-485 2-wire, no
termination
RS-485 2-wire, 120Ω
termination
RS-422/485 4-wire,
no termination
RS-422/485 4-wire,
termination 120Ω
RS-422/485 4-wire,
T termination 120Ω
RS-422/485 4-wire,
and R- termination 120Ω
The following figure illustrates the device's circuit board with the layout of the
jumpers.
The jumpers J1 and J2 are used to set the device into the firmware upgrade mode.
Otherwise, they ought to be in 2-3 state.
The layout of the jumpers on the printed circuit board
Radio modem PRM4 868MHz /User's manual V1.6 / 24.05.2011
State
Jumpers
1-2
J3, J4, J5, J6, J10
1-2
J11, J8
1-2
J11
1-2
J8, J9
R
1-2
J8
1-2
J9
T
1-2
2-3
2-3
2-3
2-3
2-3
2-3
2-3
11