KYL-300I Datasheet, PDF (5/15 Pages) SHENZHEN KYL COMMUNICATION EQUIPMENT CO,LTD. – KYL-300I Low PowerWireless Transceiver DataModule

Shenzhen KYL Communication Equipment Co., Ltd
IV: How to use the KYL-300I
KYL-300I provide RS-232, RS-485 and USB interface port for direct connection with
PC, RS485 devices, monolithic processors and other UART components kinds of
applications. The schematic diagram is shown below:
1. Power supply
The factory default setting is +5V(7.5V-12V will inform when placing the
order).By using better ripple factor, KYL-300I 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-300I 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
1
VCC
Power supply DC
5V
Connection
with terminal
Remarks
2
A (TXD)
A of RS-485(TxD of RS-232)
A(RxD)
3
B (RXD)
B of RS-485(RxD of RS-232)
B(TxD)
4
RxD
5
GND
6
GND
7
8
9
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