Q1: Can I use existing Multi-Mode (MM) fiber cables with the VT-FB820?
A: No. The VT-FB820 is strictly designed for Single-Mode (SM) fiber optics. Attempting to push a single-mode laser signal through a multi-mode core will cause severe modal dispersion and link failure, even over very short distances. Always ensure your site’s optical distribution frame is patched with Single-Mode SC cables.
Q2: Do I need to manually configure the baud rate or parity to match my PLC?
A: No. The converter has a fully auto-sensing transparent bridge. It has automatic baud rate detection up to 115200 bps and accepts all parity/stop-bit formats without DIP switches or web interfaces. Your serial payloads (e.g. Modbus RTU) are sent on exactly as received.
Q3: Can I pair a Valtoris VT-FB820 A-end with a different manufacturer’s B-end transceiver?
A: We wouldn’t suggest that. The unit utilizes standard WDM wavelengths (1310nm/1550nm) but the proprietary serial-to-optical modulation timings vary amongst manufacturers. Always use the VT-FB820 as matched A-end and B-end pair to ensure zero packet loss and no ground loop crashes.
Q4: My field devices are RS485, but my new SCADA server requires Modbus TCP/IP. Does this fiber bridge translate the protocol?
A: No, this is a purely physical Layer 1 media converter (Serial in, Serial out over long distances). It does not perform protocol translation. If you need to convert legacy RS485 data into TCP/IP network packets over fiber, you need our [Valtoris VT-FB810 Fiber Serial Device Server]
Documents
Utilities
