Wireless DATA/PTZ RS232/485 Module
1>NLOS distance:2KM
2>Port:Shenzhen
3> Provide voice transmission channel
Special Features:
Use TCXO and digital PLL advanced technologies, high stability;
Integration of transceiver, both digital and analog signals can be send and switch quickly;
Steady outsell, good hidden and stronger anti-interference;
Industrial designs, work temperature: -40~+70°C;
Several kinds of interfaces for choice: RS-232, TTL, RS-485;
DATA Format: 8N1/8E1/8O1( Customized )
Antenna Impedance: 50Ω (SMA Customized)
Application:
Remote reading system of water, electric and gas supply;
Building Automation, security & protection, devices monitoring and access control
system;
Wireless calling system;
Spot management, station management;
RF transmitter Wireless electronic display screen and queuing machine;
Electronic bus station and intelligent traffic;
Alarm systems.
Specification:
Frequency: VHF/UHF ( 223-235MHz )
Power: 500mW
Frequency stability: ± 2.5ppm
Mode: half-duplex
Channel spacing: 25KHz
Voltage: DC 12V (Customized)
Transmission distance: 2km
Receiver Indicator:
Usable sensitivity: ≤0.25μV (12dB SINAD)
Adjacent channel selectivity: ≥70dB
Spurious Response Immunity: ≥ 65dB
Adjacent channel power ratio: ≥70dB
Audio Output: 0.5W(8Ω, 10% Distortion)
Distortion: ≤3%
Current: ≤ 50mA
Transmitter indicator:
RF Output: 500mW
Adjacent channel power ratio: ≥70dB
Modulation Distortion: ≤3%
Modulation Sensitivity: 5mV
Current: ≤300mA
Size: 70*46*8mm
Interfaces definition:
| Name | Description | Level | Remark |
1 | VCC | DC | 12 V
| DC 12V ( as good in range 7.5~15V), or customized |
2 | ||||
3 | GND | GND | --------- | ----------------- |
4 | ||||
5 | A(TXD) | RS-485 A or TXD of RS-232 |
| Either RS-485 or RS-232 |
6 | B(RXD) | RS-485 B or RXD of RS-232 |
| |
7 | PTT | Transmit control | TTL | Low level validity |
8 | MIC | Audio input | -------- | Recommend 1K-2K, -27dB sensitivity of microphone |
9 | SP | Audio output |
| 8Ω 0.5 |
10 | SQ | Receiving indication | TTL | High-level |
Complete set of equipment:
1. One module of SG-M304;
2. 10 pin flat connector;
3. A whip antennas (about 10cm)
Replacement
Influence the second sale of products do not belong to the category of return within 30 days you get this product. Such as appearance injury, High-voltage fuse, Damp, Broken seals, soaking, and so on. Transportation costs of replacement, repairment etc. Paid by the buyer!!!
Warranty
One year free warranty, 3 months for spare parts. We only charge for replacement parts cost when exceed one year.
Shippment
Items are only shipped after all payments are received by DHL, UPS, FEDEX etc. within one work day. Free shipping to select countries, please check carefully the shipping & packing in detail. For dispatching smoothly and safety, we have the final decision on the selection of shipping company. Please do kindly notice that there maybe a little difference in transportation time by the reason as climate, accident or other issues, sorry for not responsible for any reason of delays.
