Shenzhen KYL Communication Equipment Co., Ltd
Fax: +86-755-83408785
www.rf-data.com
4
1. Power supply
The factory default setting is +5V (7.5V-12V will inform when placing the
order).By using better ripple factor, KYL-300M transceivers can also share power
supply with other equipment. If possible, a voltage-stabilizing chip with 5V voltage
is more recommended as the only power supply than Switch power supply. But if
only switch power supply available, the jam by switch pulse to the transceivers
should be avoided. In addition, the reliable grounding must be used if there is other
device in the system equipment. In case of failing to connect with the ground, it can
form its own grounding but must be absolutely separated from the municipal
electric supply.
2.
Connection Definition with terminal
KYL-300M transceivers supply one 9-pin connector (JP1), their definitions and
connection methods with terminals are shown in Table 1.
Table 1: JP1 Pin Definitions and connection methods
Pin No. Signal Name Function
Level
Connection
with terminal
Remarks
1
GND
Grounding of power supply
Ground
2
Vcc
Power supply DC
5V
3
RxD/TTL
Serial data input to the transceiver
TTL
TxD
4
TxD/TTL
Transmitted
data
out
of
the
transceiver
TTL
RxD
5
SGND
Signal
6
A (TXD)
A of RS-485(TxD of RS-232)
A(RxD)
7
B (RXD)
B of RS-485(RxD of RS-232)
B(TxD)
8
SLEEP
Sleep control (input)
TTL
Sleep signal
High
level
sleep
9
RESET
Reset signal(input)
TTL
Negative
pulse reset
3. The connection schematic diagram between computer and our
RF module
