Shenzhen KYL Communication Equipment Co., Ltd
Fax: +86-755-83408785
www.rf-data.com
5
1. Power supply
The factory setting is +5V (needing 7.5V-12V, please notify us when placing the
order). Using better ripple factor, KYL-300L transceivers can also share power
supply with other equipment. If possible, a voltage-stabilizing chip with 5V voltage
is much 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 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-300L 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
