Functional description | Schneider Electric 100BASE-FX, 100BASE-TX

1. Functional description

1.1 GENERAL FUNCTIONS Signal regeneration

The Transceiver 100 Mbps TX/FX processes the signal shape and amplitude of the data received.

1.2SPECIFIC FUNCTIONS OF THE TP INTERFACE

Link control

The Transceiver 100 Mbps TX/FX monitors the connected TP line segments for short-circuit or interrupt using idle signals during frame pauses in accordance with IEEE standard 802.3 100BASE-TX. The Transceiver 100 Mbps TX/FX does not transmit any data in a TP segment from which it does not receive an idle signal.

Note: A non-occupied interface is assessed as a line interrupt. The TP line to terminal equipment which is switched off is likewise assessed as a line interrupt as the de-energised transceiver cannot transmit idle signals.

1.3SPECIFIC FUNCTIONS OF THE F/O INTERFACE

Link control

The Transceiver 100 Mbps TX/FX monitors the connected F/O lines for interrupts using idle signals during frame pauses in accordance with IEEE standard 802.3 100BASE-FX. The Transceiver 100 Mbps TX/FX transmits no data to an F/O line from which it is receiving no idle signal.

Low Light Detection: If the optical input power decreases below the low light threshold the transmit and receive path will be disabled for data and the idle signal will be transmitted.

1.4DISPLAY ELEMENTS

Equipment status

The LEDs provide information about the status which affects the function of the entire Transceiver 100 Mbps TX/FX.

P1 - Power 1 (green LED)

- lit:

- supply voltage 1 present

-not lit: - supply voltage 1 not present,

-hardware fault in Transceiver 100 Mbps TX/FX

P2 - Power 2 (green LED)

- lit:

- supply voltage 2 present

-not lit: - supply voltage 2 not present,

-hardware fault in Transceiver 100 Mbps TX/FX

FAULT - Fault (red LED)

- lit:

- the indicator contact indicates error

Port status

These groups of LEDs display port-related information.

DA STAT 1 - Data and Link status TP-Port (Port 1) (green/yellow LED)

- lit yellow: Transceiver 100 Mbps TX/FX receives data on the TP interface

Depending on the network load the illumination of the LED can vary between flickering and continuous illumination.

-lit green: Transceiver 100 Mbps TX/FX receiving idle signals from the TP segment,

- the attached TP segment works

properly

- not lit: Transceiver 100 Mbps TX/FX not receiving idle signals from TP segment,

-the assigned TP port is not attached,

-the attached device is switched off,

-the TP line is interrupted or short- circuited,

-Transceiver 100 Mbps TX/FX hardware error.

DA STAT 2 - Data and link status of F/O port (Port 2) (green/yellow LED)

-lit yellow: Transceiver 100 Mbps TX/FX receiving data from F/O segment

Depending on the network load the illumination of the LED can vary between flickering and continuous illumination.

-lit green: Transceiver 100 Mbps TX/FX receiving idle signals from the F/O segment,

-the attached F/O segment works properly

- not lit:	Transceiver 100 Mbps TX/FX not
	receiving idle signals from F/O
	segment,
	- the assigned F/O port is not
	attached,
	- the attached device is switched off,
	- Low Light Detection
	- the receive F/O line is interrupted,
	- Transceiver 100 Mbps TX/FX not
	receiving data at the interface,
	- Transceiver 100 Mbps TX/FX
	hardware error.

Data transmission

The Transceiver 100 Mbps TX/FX supports half duplex (HDX) and full duplex (FDX) connections. Changing the configuration is not necessary.

1.5CONTROLS 2-pin DIP switch

Using the 2-pin DIP switch on the Transceiver 100 Mbps TX/FX front panel

- the message about the link status can be suppressed by the indicator contact on a port- by-port basis. Using switch LA1, the message about the link status of the TP port (port 1)is suppressed, using switch LA2, the message about the link status of the F/O port (port 2) is suppressed. State of delivery: switch position 1 (ON), i.e. message not suppressed, the indicator contact passes the faulty link status.

Off	On			Suppress message
				about link status
		LA1	Port 1
				– of the TP port
		LA2	Port 2

				– of the F/O port
0	1

via indicator contact

Fig. 1: 2-pin DIP switch

1.6 INTERFACES TP connection

One 8 pole RJ45 socket enables an independent TP segment to be connected. The housing of the socket is electrically connected to the front panel.

- Pin configuration of the RJ45 socket:

- TD+: Pin 3,	TD-: Pin 6
- RD+: Pin 1,	RD-: Pin 2

- remaining pins: not configured.

n.c.	Pin 8
n.c.	Pin 7
TD-	Pin 6
n.c.	Pin 5
n.c.	Pin 4
TD+ Pin 3
RD-	Pin 2

RD+ Pin 1

Fig. 2: Pin configuration TP interface

F/O connection

One optical port conform to 100BASE-FX (SC socket) enables terminal devices or optical network components to be connected.

5-pin terminal block

The supply voltage and the indicator contact are connected via a 5-pin terminal block with screw locking mechanism.

Warning

The Transceiver 100 Mbps TX/FX equipment is designed for operation with SELV. Only safe extra-low voltages to IEC950/EN60950/VDE0805 may therefore be connected to the supply voltage connections and to the indicator

L1+

+24 V

Fault

L2+

+24 V *

Fig. 3: Pin configuration of 5-pin terminal block

-Voltage supply: The voltage supply can be connected to be redundant. Both inputs are decoupled. There is no load distribution. With redundant supply, the power pack supplies the Transceiver 100 Mbps TX/FX alone with the higher output voltage. The supply voltage is electrically isolated from the housing.

-Indicator contact: Contact interrupt indicates the following by means of a volt-free indicator contact (relay contact, closed circuit):

-the failure of at least one of the two supply voltages.

-a permanent fault in the transceiver (internal 5 V DC voltage, supply voltage 1 or 2 not within the permissible range).

-the faulty link status of the TP port (port 1), if the setting of DIP switch LA1 is “ON”.

-the faulty link status of the F/O port (port 2), if the setting of DIP switch LA2 is “ON”.

The indication of the link state might be masked on a port-by-port basis using the DIP switches LA1 and LA2.

The indicator contact is closed,

-if the power supply is OK.

-if the setting of DIP switch LA1 is “ON” and the link status of port 1 is OK (or if the setting of DIP switch LA1 is “OFF”).

-if the setting of DIP switch LA2 is “ON” and the link status of port 2 is OK (or if the setting of DIP switch LA2 is “OFF”).

Note: In the case of the voltage supply being routed without redundancy, the Transceiver 100 Mbps TX/FX indicates the failure of a supply voltage. You can prevent this message by feeding in the supply voltage through both inputs.

100BASE-FX, 100BASE-TX specifications

Schneider Electric, a global leader in digital transformation of energy management and automation, offers a variety of networking technologies, including 100BASE-TX and 100BASE-FX. These technologies are foundational in building robust and efficient local area networks (LAN), particularly for industrial applications, commercial enterprises, and smart buildings.

100BASE-TX is an Ethernet standard that operates over twisted-pair cabling, typically utilizing Category 5 or better cabling. This standard supports a data rate of 100 Mbps and has a maximum segment length of 100 meters. One of its main features is its simplicity and cost-effectiveness, enabling easy installation and maintenance. It uses two pairs of wires in the cable: one pair for sending data and the other for receiving. This full-duplex capability allows simultaneous transmission and reception of data, enhancing network efficiency.

100BASE-FX, on the other hand, is designed for fiber-optic networks. It operates over multimode fiber and provides the same 100 Mbps data rate as 100BASE-TX but supports longer cable lengths, up to 2 kilometers (2000 meters). 100BASE-FX includes features that are essential for environments that require high resistance to electromagnetic interference (EMI) and enhanced security. The fiber-optic medium minimizes signal degradation, making it suitable for data transmission over longer distances without loss of integrity.

Both 100BASE-TX and 100BASE-FX incorporate technologies such as auto-negotiation, allowing devices to detect the highest speed and mode available for communication. This compatibility promotes seamless integration between devices, making Schneider Electric's networking solutions versatile and scalable.

The rugged design of Schneider Electric’s networking equipment means that both standards can effectively operate in harsh industrial environments. Their products often feature robust enclosures that resist dust, moisture, and extreme temperatures, ensuring reliable performance over time.

Implementing these technologies enables Schneider Electric to support various applications, from manufacturing automation to smart grid solutions, aligning with the increasing demand for reliable and efficient networking infrastructures. Their 100BASE-TX and 100BASE-FX solutions are pivotal in constructing a more connected, automated, and intelligent world. Native support for these standards facilitates not just connectivity but also innovation in energy management and operational excellence.