DECODE PRM4 사용자 설명서 - 페이지 8
{카테고리_이름} DECODE PRM4에 대한 사용자 설명서을 온라인으로 검색하거나 PDF를 다운로드하세요. DECODE PRM4 20 페이지. 868mhz
페이지 인쇄3 Installing the device
3.1 Power supply
The PRM 4 is powered by 5 to 28 VDC or 3.3 to 12VDC in battery powered version
of the product. The standard current drain is less than 50mA with the transmitter
turned on constantly and drops to 2-3mA in the reduced power consumption mode
(excluding the RS232 consumption). The power is supplied through the detachable
screw connector with 3.5mm gap on the back plate of the device. Mind the polarity of
the power connector pins. The power connector has reverse polarity and over-voltage
protections.
3.2 Serial connector
The connection of a serial interface is achieved by 9-pin female connector (DB9F).
Depending on the position of the jumpers located on the circuit board, the device can
be connected with the following interfaces: RS-232C, RS-422 and RS-485. If the
jumpers are set for RS-232C, the signal layout matches the DCE side. The following
table shows the DB9F connector signal layout for different serial connections.
Pin DB9F
connector
1
2
3
4
5
6
7
8
9
Radio modem PRM4 868MHz /User's manual V1.6 / 24.05.2011
PRM4 back plate
RS-232
signals
DCD
output
RD
output
TD
input
DTR
input
GND
-
DSR
output
RTS
input
CTS
output
RI
(1)
output
(1)
RS-422
RS-485
signals
signals
-TX
-TX/RX
-RX
GND
GND
+RX
+TX
+TX/RX
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