CIRCUIT DESIGN SLR-434M Operation Manual Download Page 11

OPERATION GUIDE

OG_SLR-434M_v10e

Circuit Design, Inc.

11

Channel

Frequency

Channel

Frequency

Channel

Frequency

NO.

HEX

(MHz)

NO.

HEX

(MHz)

NO.

HEX

(MHz)

102

66

434.3500

114

72

434.5000

126

7E

434.6500

103

67

434.3625

115

73

434.5125

127

7F

434.6625

104

68

434.3750

116

74

434.5250

128

80

434.6750

105

69

434.3875

117

75

434.5375

129

81

434.6875

106

6A

434.4000

118

76

434.5500

130

82

434.7000

107

6B

434.4125

119

77

434.5625

131

83

434.7125

108

6C

434.4250

120

78

434.5750

132

84

434.7250

109

6D

434.4375

121

79

434.5875

133

85

434.7375

110

6E

434.4500

122

7A

434.6000

134

86

434.7500

111

6F

434.4625

123

7B

434.6125

135

87

434.7625

112

70

434.4750

124

7C

434.6250

136

88

434.7750

113

71

434.4875

125

7D

434.6375

*The channel is set to No. 74 (434.000 MHz) for shipment.

*If you intend to use several SLR-434M units in the same area, use a channel plan that takes into
account radio interference due to third-order intermodulation.

Circuit Design provides a computational tool on our website for creating channel plans that avoid
interference due to third-order intermodulation. Calculation tool:
http://www.cdt21.com/resources/siryo6.asp

8. UART port communication settings

The serial communication conditions for the UART port of this product are as follows.

Communicatio
n speed

19,200 bps

Fixed value

Cannot be

changed.

Data

8-bit

Parity

None

Stop

1-bit

Flow control

Hardware: RTS/CTS pin
(Software flow: Xon/Xoff is not used)

(The RTS output terminal is normally Lo. When the CTS input terminal is “Hi”, UART data is not
output)

Note: The UART serial communication terminals (TXD/RXD/RTS/CTS) cannot be connected

directly to a PC or other Com port because the signal level and logic is different.

Summary of Contents for SLR-434M

Page 1: ...sign Inc Embedded low power radio modem SLR 434M Smart RF modem Operation Guide Version 1 0 Jan 2018 Circuit Design Inc 7557 1 Hotaka Azumino Nagano Japan Tel 0263 82 1024 Fax 0263 82 1016 e mail info...

Page 2: ...nts 1 OVERVIEW 3 2 FEATURES AND APPLICATIONS 3 3 SPECIFICATIONS 4 4 PART NAMES AND FUNCTIONS 5 5 CONNECTION EXAMPLES FOR DIO TERMINALS 8 6 APPEARANCE 9 7 COMMUNICATION FREQUENCY TABLE 10 8 UART PORT C...

Page 3: ...to 8 contacts 2 Features and applications Features RED compliant Plan Ultra long distance communication using the LoRa mode Enhanced resistant to city noise and longer range compared with our earlier...

Page 4: ...orage temperature range 30 to 80 C Recommended operating voltage range 3 5 to 5 0 V Warranted operating voltage range 3 3 to 5 5 V Operating current Tx 29 mA Typ Rx 17 mA Typ Supply power 5 V Antenna...

Page 5: ...bps Bits 8 Parity none Stop 1 Serial data Transmitter RXD I Serial data Receiver RTS O The UART control terminal When RTS Hi do not input data Hardware flow control output terminal CTS I The UART cont...

Page 6: ...LORA CMD MODE or FSK CMD MODE is output from the TXD terminal after the device restarts After reset and restart the device is initialized to the setting value saved by adding W to commands such as ch...

Page 7: ...he transmission monitor LED connection terminal Lo Active When a radio wave communication signal is sent this terminal changes to Lo GND The ground terminal VCC The power supply terminal Connect to a...

Page 8: ...nal level inverted via a transistor Using long wiring between the DIO terminal and the switch may cause malfunction due to noise In that case take measures such as externally pulling down with a resis...

Page 9: ...6 Appearance Note When designing circuit boards take care to ensure space for the SMA connector dimensions and screw fixture for connecting the antenna If the underside of the connector is also the su...

Page 10: ...4F 434 0625 12 0C 433 2250 46 2E 433 6500 80 50 434 0750 13 0D 433 2375 47 2F 433 6625 81 51 434 0875 14 0E 433 2500 48 30 433 6750 82 52 434 1000 15 0F 433 2625 49 31 433 6875 83 53 434 1125 16 10 43...

Page 11: ...34 000 MHz for shipment If you intend to use several SLR 434M units in the same area use a channel plan that takes into account radio interference due to third order intermodulation Circuit Design pro...

Page 12: ...D setting Equipment Target station Group ID EI DI GI 0A With Equipment ID EI 0A Sets the Equipment ID local station to 0A Sets the ID for identifying each radio station and the other party in communic...

Page 13: ...fter command value data optional add the line feed code CR LF If you omit value data you can check the content of the current settings If the optional W is added the setting value is saved and it beco...

Page 14: ...cuits and reverse connections may result in overheating and damage and must be avoided at all costs Ensure that the power supply has been switched off before attempting any wiring work The case is con...

Page 15: ...vision History Version Date Description Remark 0 91 Feb 2017 Provisional Edition 1 0 Jan 2018 The copyright of this manual belongs to Circuit Design Inc Reproduction duplication or modification of par...

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