Shenzhen KYL Communication Equipment Co., Ltd
Fax: +86-755-83408785
www.rf-data.com
4
1. Power supply
The factory setting is +5V (7.5V-12V is also available, please specify when placing
the order). Using better ripple factor, KYL-300I transceiver can share power supply
with other equipments. If possible, a voltage-stabilizing chip with 5V voltage is
more recommended than Switch power supply. But if only switch power supply is
available, the jam caused by switch pulse should be avoided. In addition, the
reliable grounding must be used if there is other device in the system. 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
Connection
with terminal
Remarks
1
VCC
Power supply DC
5V
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
GND
6
7
8
9
3. The connection schematic diagram between computer and our RF module
