Shenzhen KYL Communication Equipment Co., Ltd
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
1
2
3
4
5
6
7
8
9
GND
Vcc
RxD/TTL
TxD/TTL
SGND
A (TXD)
B (RXD)
SLEEP
RESET
Grounding of power supply
Power supply DC
Serial data input to the transceiver
Transmitted
transceiver
Signal
data
out
of
5V
TTL
the TTL
TxD
RxD
Connection
with terminal
Ground
Remarks
A of RS-485(TxD of RS-232)
B of RS-485(RxD of RS-232)
Sleep control (input)
Reset signal(input)
TTL
TTL
A(RxD)
B(TxD)
Sleep signal
High
level
sleep
Negative
pulse reset
3. The connection schematic diagram between computer and our RF module
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www.rf-data.com
5
KYL [ SHENZHEN KYL COMMUNICATION EQUIPMENT CO,LTD. ]
