Phoenix FL MC 1000 SC (ST) Fiber Optic Converter

Value: Without LFPT, when the fiber optic link is interrupted, the RJ45 end device may still consider the link to be normal (because the directly connected electrical port is still active), causing upper layer applications to be unable to timely detect the fault, resulting in data loss or response delay. After enabling LFPT, both devices on both ends can immediately detect link interruptions, triggering alarms or redundant switching mechanisms. The manual specifically states that the LFPT function should only be enabled when two media converters are used in series to ensure the correct propagation of fault signals.

3.4 Rich LED status indicator lights

The front panel of the device provides a clear array of LED indicator lights for quick on-site diagnosis:

US (power supply): Green constant light indicates that the power supply voltage is within the allowable range; Turning off indicates that the voltage is too low.

LNK/ACT (Link/Activity): Green constant light indicates that the electrical interface link has been established; Green flashing indicates that data is being transmitted (it may appear as a constant light when the data rate is high).

10/100 (speed): Orange constant light indicates that the RJ45 port is operating at 100Mbps; Extinguishing indicates working at 10Mbps.

Fiber port status: Although there is no independent LED, the fiber link status can be indirectly determined through the combination of LFPT and LNK/ACT.

3.5 Flexible DIP switch configuration

There is a 7-bit DIP switch at the bottom of the device, with the first 4 bits used to configure key operating parameters:

DIP Position Function Description

1 Link Fault Direct (LFPT) ON Global Fault: Either port failure, both ends disabled

OFF local fault: only interrupts the fault segment (recommended for startup or single link)

2 Self negotiation/forced mode OFF Self negotiation mode (default, automatically negotiating rate and duplex with the other end)

ON forced mode (requires manual setting with DIP 3 and 4)

3 Transmission rate (in forced mode) OFF 100 Mbps

ON 10 Mbps

4 Duplex Mode (Forced Mode) OFF Full Duplex

ON half duplex

Note: DIP bits 5, 6, and 7 are reserved for future expansion.

This configuration system enables the FL MC 1000 series to seamlessly integrate into standard self negotiating networks, as well as enforce specified port operating modes when required to interface with old or special devices, ensuring compatibility.

3.6 Security Frame Support

The RJ45 port design is compatible with Phoenix Contact's FL PLUG GUARD series safety locks. This attachment can physically lock Ethernet cables to prevent unauthorized plugging or unauthorized device access, enhancing the physical security of industrial networks in open or semi open environments.

Detailed technical specifications

4.1 Power Supply

The FL MC 1000 series uses pluggable screw terminal blocks for power supply and supports a wide range of DC inputs:

Nominal voltage: 24 V DC or 48 V DC

Allowable voltage range: 12 V DC... 57 V DC

Typical current consumption: 73 mA @ 24 V DC

Allowable ripple: 3.6 Vpp (within voltage range)

Surge current: 8 A at 48 V DC (continuous for 1.8 ms)

Polarity reversal protection: built-in

Test voltage withstand: 500 V AC (1 minute)

The power terminal can be connected to 0.2 2.5 mm ² (24... 12 AWG) wire, recommended PE grounding wire is 2.5 mm ². The required tightening torque is 0.5 .. 0.6 Nm。

Important safety reminder: The device is designed for SELV (Safety Extra Low Voltage) and PELV (Protection Extra Low Voltage) circuits and must comply with IEC 61140/EN 61140 standards. When the device is mounted on a grounded DIN rail, a grounding connection is automatically established, but it is recommended to use grounding terminals to ensure low impedance grounding.

4.2 Ethernet interface (RJ45)

Number of interfaces: 1

Connector type: RJ45 female socket

Transmission medium: twisted pair, conductor cross-section 0.14 mm ²... 0.22 mm ², characteristic impedance 100 Ω

Transmission speed: 10 Mbps or 100 Mbps (auto negotiated or forced)

Maximum network segment length: 100 meters

MDI/MDIX switching: automatic

4.3 Fiber optic interface (SC or ST)

Number of interfaces: 1 (including both sending and receiving channels)

Connector type: SC duplex (FL MC 1000 SC) or ST (FL MC 1000 ST)

Wavelength: 1310 nm

Transmission speed: 100 Mbps (fixed, due to 100Base FX)

Fiber types: multimode glass fiber (62.5/125 μ m or 50/125 μ m), and HCS (hard clad quartz) fiber

Typical transmission distance (depending on fiber quality):

Using 62.5/125 μ m, attenuation of 0.7 dB/km (F1000): 8 km

Using 62.5/125 μ m, attenuation of 2.6 dB/km (F600): 3.3 km

Using 50/125 μ m, attenuation of 0.7 dB/km (F1200): 9.6 km

Using 62.5/125 μ m, attenuation of 1.6 dB/km (F800): 5.3 km

Using 200/230 μ m HCS GI fiber (F-GK): 2 km

Operation warning: It is strictly prohibited to directly look at the emitting diode or use optical auxiliary tools to observe the fiber end face during work, as 1310nm infrared light is not visible but may damage the eyes. Additionally, do not remove the dust cap before connecting to prevent contamination of the optical components.

4.4 Environmental and Mechanical Specifications