All VERSITRON products purchased after January 2001 carry a limited lifetime warranty against defects in material and workmanship. Purchases made prior to January 2001 are warranted for a period of one year from date of delivery. VERSITRON reserves the right to repair or, at our option, replace parts which during normal usage prove to be defective during the warranty period provide that:

1. You call VERSITRON at (302) 894-0699 or (800) 537-2296 and obtain a (RMA) Return Authorization Number. Please reference your RMA number on the outside of the box in which the item is returned.

2. Shipping charges are pre-paid.

No other warranty is expressed or implied and we are not liable for consequential damages. For repairs outside of the warranty period, the same procedure must be followed.

General Description

The M725X Gigabit Ethernet media converter series provides a conversion allowing Gigabit integration of fiber optic and copper (twisted-pair) segments. It is used to extend the connection distance between two copper Gigabit Ethernet devices via fiber optic cable transparently with no performance degradation.

Key Features

This guide covers the following converter models:

M7254 UTP to 220m (or 500m) SC multimode fiber

M7255 UTP to 10Km SC single mode fiber

M7255-4 UTP to 40Km SC single mode fiber

The outline of the converter is:

1.1 Specifications

Twisted Pair Interface

• Compliance 802.3ab 1000BaseT
• Connector Shielded RJ-25 jack
• Pin assignments Auto-crossover for MDI & MDI-X
• Data speed 1000Mbps
• Duplex mode Auto-negotiation for half/full duplex
• Cable type 4-pair Category 5 UTP
• Cable length 328ft (100m)

Fiber Optic Interface

• Compliance 802.3z 1000BaseSX/LX
• Connector Duplex SC
• Data speed 1000Mbps
• Duplex Mode Forced full-duplex or auto-negotiation
• Auto SW Auto-negotiation Enable/Disable switch
• Cable types Multimode (MM) – 50 or 62.5/125 µm

General Information

• Frame Types 802.3 Std. 64Bytes ~ 1518Bytes frames VLAN tagged frames (plus 4 bytes tag)
• Input power +5VDC (+/- 10%) 1.5A min.
• Consumption 4 watts max. (0.8A max. A +5V)
• Dimension H25mm x W96mm x D101mm
• Housing Enclosed metal with no fan
• Op. Temp. -10 ° C ~ 40 ° C (cold start 0 ° C)
• Stor. Temp. -20 ° C ~ 70 ° C
• Rel. Humidity 0% ~ 70%

 

 

 

SECTION 2

General Description

2.1 Media Converters



 

2.1.1 Functions of 1000BaseT Port (UTP)

• Auto-negotiation support for connecting to auto-negotiation devices
• Supports both half-duplex and full duplex operations
• Auto MDI/MDI-X crossover configuration and receiving polarity correction for UTP connection

Pin Assignments

Pin	MDI	MDI-X
1	BI_DA+	BI_DB+
2	BI_DA-	BI_DB-
3	BI_DB+	BI_DA+
4	BI_DC-	BI_DD-
5	BI_DC+	BI_DD+
6	BI_DB-	BI_DA-
7	BI_DD+	BI+DC+
8	BI_DD-	BI-DC-

 

2.1.1 Functions of 100BaseX Port (Fiber Interface)

• Full data rate of 1000Mbps for full duplex operation
• Auto SW on rear panel to enable or disable auto negotiation function as follows:

NON-AUTO Disable auto negotiation function (forced full duplex mode)

AUTO Enable auto negotiation function

Note: For connecting to a 1000BaseX device, which did not provide auto negotiation capability, setting SW to NON-AUTO may prevent unexpected link failure occurrence. In most cases, the AUTO setting will work. With two of these converters at both ends of the fiber connection, set the switch to NON-AUTO (forced full duplex mode) to achieve the best performance.

 

The following table lists the fiber connectors, fiber cables and the maximum length supported by each converter model:

Model	Fiber	Wavelength	Output Power	Input Sensitivity
M7254	SX	850nm	-9.5 ~ -4dBm	-12.5dBm max.
M7255	LX	1310nm	-9.5 ~ -3dBm	-14.4dBm max
M7255-4	LX	1310nm

 

Model	Fiber Used	Cable Length
M7254	MM 62.5/125µm	220 meters
	MM 50/125µm	500 meters
M7255	SM 9/125µm	10 km
M7255-4	SM 9/125µm	40 km

2.2 LED Indicators

 

Name	Status	State	Interpretation
PWR	Power status	ON	Power on
		OFF	Power off
TP-LINK	UTP link status	ON	TP link up
		OFF	TP link down
TP FDX	UTP duplex status	ON	TP Full duplex
		OFF	TP Half duplex
		BLINK	Collisions on half-duplex
TP-RX	UTP Rx status	ON	TP Reciever in operation
		OFF	TP no receiving operation
TP-TX	UTP Tx status	ON	TP Transmitter in operation
		OFF	TP no transmission
FBR-LNK	Fiber Link Status	On	Fiber Link up
		OFF	Fiber Link down

 

2.3 Applying Power

The DC input of the converter is:


DC Input Jack
DC input rated voltage	+5VDC
DC input voltage range	+4.75 ~ 5.25VDC
DC power consumption	max. 0.8A @+5V (4 Watts)
DC input Jack

 

Before you begin the installation, check the AC voltage of your area. The AC power adapter, which is used to supply the DC power for the unit, should have the AC voltage matching the commercial power voltage in your area.

The specifications of the AC power adapter are:



AC input power	AC power voltage of your area
DC output power	+5V minimal 1.5A

Steps to apply power are:

1. Connect the power adapter DC plug to the DC input jack located on the back of the converter before connecting to the AC outlet

2. Connect the power adapter to the AC outlet

3. Check power LED indication

 

2.4 Making Connection

The figure below shows the configuration used when connecting to an auto-negotiation device and a non-auto-negotiation device.



For proper communications, the UTP connections on both ends must be in the same configuration, either 1000M full duplex or 1000M half-duplex. Set the Auto SW to NON-AUTO mode to use forced full duplex mode for the fiber connection.



 

 

The information contained in this document is subject to change without prior notice.

Copyright ©.All Rights Reserved

TRADEMARKS Ethernet is a registered trademark of Xerox Corp.

FCC WARNING This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with this user's guide, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense.

CE NOTICE Marking by the symbol indicates compliance of this equipment to the EMC directive of the European Community. Such marking is indicative that this equipment meets or exceeds the following technical standards:

EMC Class A

EN50081-1/1992: EN55022, EN61000-3-2, EN61000-3-3

EN50082-1/1998: EN61000-4-2, EN61000-4-3, EN61000-4-4,

EN61000-4-5, EN61000-4-6, EN61000-4-8, EN61000-4-11

 

Return to VERSITRON

Return to Manuals Resource