General
Range	4–5 km
Wavelength	1300 nm
Reception sensitivity	-32 dBm
Link budget	12 dB
EMC	EN 55032/35
Auto-negotiation
Auto-MDI/MDI-X
Relay output for power failure
Overcurrent protection

The Moxa PTC-101-M-ST-LV is an Ethernet-to-fiber media converter designed for industrial applications with high requirements for reliability and operational safety. It is specifically designed for use in power distribution systems and complies with the IEC 61850-3 standard, which applies to operational safety in electrical power installations. The device connects Ethernet networks via copper cables (RJ45) with fiber optic cables, enabling powerful and interference-resistant data transmission over longer distances. The robust metal housing and extended temperature range make it suitable for harsh environments, such as those found in industry, energy, or public transport.

Applications
This converter is particularly suitable for industrial networks where high availability and interference resistance are required. Typical application scenarios include power distribution networks, process automation, traffic control systems, and other critical infrastructures. Compliance with IEC 61850-3 ensures suitability for use in electrical power installations, where high requirements apply to electrical safety, EMC compatibility, and environmental resistance. The ability to operate at extreme temperatures from -40 to 85 °C enables use in outdoor environments, air conditioning systems, production halls, or vehicles.

Functions and Features in Detail
The PTC-101-M-ST-LV features an RJ45 port for 10/100BaseT(X) with Auto-Negotiation and Auto-MDI/MDI-X, enabling simple and automatic adaptation to various network devices. The fiber optic connection is implemented as an ST connector and supports multi-mode fiber (1300 nm) with a range of 4 to 5 km. Optical characteristics include a transmit power of -10 to -20 dBm and a receive sensitivity of -32 dBm, resulting in a link budget of 12 dB. These values ensure a stable connection over the specified distance. Additionally, the device offers the Link Fault Pass-Through (LFPT) function, which forwards the status to the connected network device in case of fiber link failure, enabling rapid fault detection.

Technology Explained Simply
The integrated power supply allows direct connection to a DC voltage source in the range of 20 to 72 VDC. This voltage range is typical for industrial installations, where 24 VDC or 48 VDC is commonly available. The power supply is equipped with overcurrent protection to safeguard the device against damage from current surges. A special feature is the relay output, which activates in case of power failure — a function specifically designed for LV models. This enables external signaling or control in the event of power loss. The power supply is redundant, meaning two independent inputs are available to increase availability.

Compatibility and Accessories
The device is compatible with standard Ethernet networks and supports common fiber optic standards. The use of multi-mode fiber with ST connector enables connection to existing infrastructures. The converters can be integrated into existing networks without requiring additional configurations, as Auto-Negotiation and Auto-MDI/MDI-X handle adaptation to different devices. Certifications according to EN 55032/35, CISPR 32, FCC Part 15B Class A, and other EMC and safety standards guarantee compatibility in complex electrical environments.

Mounting and Installation
Mounting is done on a DIN rail, enabling standardized and secure installation in enclosures or control cabinets. The metal housing provides mechanical protection and aids in heat dissipation. Dimensions are 152.15 mm (width) × 126.46 mm (height) × 66.65 mm (depth), allowing installation in standard enclosure modules. Installation requires no special tools, as mounting is done via the DIN rail. The included quick start guide supports setup.

Operational Advantages
The high reliability of the device is underscored by an MTBF of 4,660,534 hours (according to Telcordia SR332). The integrated power supply, redundant power supply, and relay output for power failures enhance operational safety. Support for Auto-Negotiation and Auto-MDI/MDI-X reduces configuration effort. Compliance with IEC 61850-3 and fulfillment of EMC and safety standards make the device suitable for critical applications. The ability to operate at extreme temperatures extends the range of use in harsh environments.

The delivery includes the device itself, a quick start guide, and a warranty card.