Specifications

Chapter 2 Installation and Setup Installation and Operation Manual
2-6 Installation and Setup FOM-E3/ETH, FOM-T3/ETH Ver. 1.0
The fiber optic interface of the FOM-E3/ETH or FOM-T3/ETH units terminate in ST,
FC or SC connectors, designated TX and RX.
 To connect the fiber optic interface:
1. Remove the protective caps from the connectors and store them in a safe
place for later use.
2. Connect the transmit fiber to the connector marked TX and the receive fiber
to the connector marked RX.
3. At the remote unit connect the transmit fiber to the connector marked RX
and the receive fiber to the connector marked TX.
Connecting the Ethernet Interface
The Ethernet interface of FOM-E3/ETH and FOM-T3/ETH terminates in an RJ-45
connector, designated 10/100BASE-T.
Table 2-3 lists the RJ-45 connector pinout.
 To connect the Ethernet interface:
• Connect the LAN to the FOM-E3/ETH or FOM-T3/ETH port, labeled
10/100BASE-T.
Table 2-3. RJ-45 Connector Pinout
Pin Name Function
1 RD (+) Receive Data Positive
2 RD (-) Receive Data Negative
3 TD (+) Transmit Data Positive
6 TD (-) Transmit Data Negative
Connecting the Power
To connect FOM-E3/ETH or FOM-T3/ETH to the power source, refer to the
appropriate section below, depending on your version of the unit (AC or DC).
Before switching on this unit and connecting or disconnecting any other cable,
the protective earth terminals of this unit must be connected to the protective
ground conductor of the mains power cord. If you are using an extension cord
(power cable) make sure it is grounded as well.
Any interruption of the protective (grounding) conductor (inside or outside the
instrument) or disconnecting of the protective earth terminal can make this unit
dangerous. Intentional interruption is prohibited.
For the AC version, make sure that only fuses of the required rating, as marked
on the rear panel, are used for replacement. Do not use repaired fuses or short-
circuit the fuse holder. Always disconnect the mains cable before removing or
replacing the fuse. Whenever it is likely that the fuse protection has been
damaged, make the unit inoperative and secure it against unintended operation.
Warning