There are many kinds of serial interfaces in the market today. Two of the oldest serial interfaces are. Both RS232 and RS485 are widely used in many applications.RS-232 is best for short-distance low-speed requirements. It is simple and low cost, and plenty of components like line drivers and receivers, UARTs, and connectors are available to build the interface. RS-232 only allows for one transmitter and one receiver on each line. RS-232 also uses a Full-Duplex transmission methodThe RS-485 is for higher speeds over longer ranges or if duplex networking capability is required.
Again, many standard parts are available to create the interface. RS-485 was made to address the multi-drop limitation of RS-422, allowing up to 32 devices to communicate through the same data line.
Any of the slave devices on an RS-485 bus can communicate with any other 32 slave devices without going through a master device.For more information, please visit or email to sales@sopto.com.Tags.
The DSC TL280LER-AT is a wireless AT&T LTE/HSPA/Internet/Cellular/Dual-Path alarm communicator with RS-232 serial connection, that is compatible with the DSC PowerSeries Neo control panels. The TL280LER-AT ensures reliable back up alarm communication of the phone line for your home or business.When the TL280LER-AT is connected to the PC-Link connector on a DSC HS2016/HS2032/HS2064/HS2128 control panel(s), the alarm reporting paths can be combined through the Public Switched Telephone Network (PSTN), if so desired, plus the cellular network and internet for increased redundancy to the GeoArm central monitoring station. It conveniently utilizes the cellular network and Internet as back-up to ensure high speed, reliable and secure alarm communications to alleviate any concerns about the possibility of phone line disruption.With 128-bit AES encryption of the alarm signal, central stations, and DIYer's can be assured that this is the most secure alarm communicator offered. And with programmable (by seconds) supervision heartbeats, the LE2080R-AT communicator's availability is fully monitored.
The TL280LER-AT offers full data reporting and remote management which saves time and reduces the maintenance costs. Also, the TL280LER-AT is used as a fundamental tool to deliver visual verification to reduce the high costs that can be incurred by false alarms and unnecessary site-checks.As more and more homes or businesses move away from traditional phone lines, towards VoIP (Voice over IP) or mobile phones, alternate delivery methods for alarm communication must be explored for security systems. The TL280LER-AT conveniently utilizes the cellular and internet network to reduce the need for dedicated phone lines and/or the impact of phone line interruption.
Rs232 Protocol
Dimensions (metal enclosure): 5.875' W x 4.5' D (150mm x 115mm). Weight: 320 g (with mounting bracket).
Input Voltage: 10.8 - 12.5 VDC. Current Draw (Standby): 100 mA (internet only). Current Draw (Standby): 120 mA (internet and cellular).
Usb To Rs232 Serial Adapter
Alarm (Transmitting) Current: 400 mA. LTE Bands: B2, B4, B5, B12, B13. Operating Frequency: 850MHz, 900MHz, 1800MHz, 1900MHz, 2100MHz. Operating Environment: 40° to 104°F (5° to 40°C). Relative Humidity: 5-93% Maximum (non-condensing). Antenna Gain: 2.0dBi. Approvals Listings: FCC/IC, PTCRB, UL/ULC, CSFM.