Signal Conditioning
Data Acquisition & Control
4-20mA Transmitters
IoT Power & Energy Monitoring
Data Communications
Power Supplies
Software
SCM9B-A1000/A2000
RS-232C/RS-485 Converters, RS-485 Repeaters
The A1000 and A2000 series converter boxes convert RS-232 communication signal levels to the correct electrical signals required by RS-485. The RS-485 communications standard is recommended when many SCM9B modules, or other addressable devices, must be connected to a host computer over long distances. The A1000 and A2000 converters allow communications bus lengths up to 4,000 feet and data rates up to 115kbps using one twisted pair of wires.
The RS-485 standard allows for bidirectional data on the same pair of wires. Therefore, some means of arbitrating the data direction is required. The A1000 and A2000 automatically control the bus direction without external handshaking signals from the host. Host software written for half-duplex RS-232 may be used without modification, RS-485 bus control is completely transparent to the user.
The A1000 and A2000 can also operate as repeaters for RS-485. Repeaters are required to extend communications bus lengths or to allow more than 32 RS-485 devices to be connected to a communications bus. A repeater simply reamplifies, or boosts, existing RS-485 signals transmitted over long distances.
The RS-485 standard allows for bidirectional data on the same pair of wires. Therefore, some means of arbitrating the data direction is required. The A1000 and A2000 automatically control the bus direction without external handshaking signals from the host. Host software written for half-duplex RS-232 may be used without modification, RS-485 bus control is completely transparent to the user.
The A1000 and A2000 can also operate as repeaters for RS-485. Repeaters are required to extend communications bus lengths or to allow more than 32 RS-485 devices to be connected to a communications bus. A repeater simply reamplifies, or boosts, existing RS-485 signals transmitted over long distances.
Certifications
Documents
Product Availability
Usually stock to 3-5 weeks. Contact Customer Service for current lead times.
Dimensions & Accessories
Features
- Completely Transparent to Host Software
- No External Flow Control Signals Required
- Optically-Isolated Bidirectional Data Flow
- Standard Data Rates: 300 to 115kbps
- Automatic Internal RS-485 Bus Supervision
- Networking up to 4,000 Feet
- CE Compliant
Block Diagram
Ordering
FAQ
Custom Modules
Below is a list of existing custom modules. If you don't see a module matching your target specifications, contact Customer Service and Application Support to discuss design guidelines and
design feasibility. Customer Service and Application Support can be reached at
sales@dataforth.com or +1-800-444-7644.
NOTE: Data in below table can be filtered. Please use the
to make your selection. If you have any questions about the displayed data,
please contact Customer Service at +1 520-741-1404 or sales@dataforth.com
* ... Status Codes: PR = Production, PT = Prototypes, QU = Quoted
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