Siemens 538-745E Installation Instructions

Fiber Optic Hub

Product Description

The Fiber Optic Hub concentrates four fiber lines
into one logical trunk for the fiber building level
network (BLN) or the floor level network (FLN). The
BLN and FLN trunk electrical signals are converted
into light energy at the remote sites by Fiber Optic
Interfaces. This device is designed to work at
speeds of 300 bps to 230K bps, with a link budget of
11.5 dB.
The Fiber Optic Hub converts light energy to
electrical signals and back to light energy for the
outgoing fibers, which connect to the remote site
Fiber Optic Interfaces' receive ports. The hub also
converts electrical signals to an Inter-Hub RS-485
bus. This bus is used for inter-connecting multiple
hubs at one location, for a maximum of 32 hubs.
The inter-hub trunk connection uses the standard
three-terminal, removable connector found on many
Siemens products. The connection can also be used
to obtain a local BLN or FLN for the building in which
the hub is installed.
The Fiber-Optic Hub is housed in a 1.5" × 7.3" × 6"
metal enclosure. It contains one power input
receptacle, eight fiber ports (four transmit and four
receive), and a three-position trunk port (refer to
Figure 2). The hub is powered by a 6 Vdc external
power pack (included). All circuits are supervised
and power limited. There are no internal settings or
user-serviceable parts. ST style port connectors are
included with the hub.
I
Power Channel 1
TX RX
Figure 1. Fiber Optic Hub (Front View).
FIBER OPTIC HUB
Channel 2 Channel 3 Channel 4
TX RX TX RX TX RX

Installation Instructions

TRUNK
+
S –
TX4
TRUNK
Figure 2. Fiber Optic Hub (Rear View).
Product Numbers
Description
Four Channel Fiber Optic Hub with
ST port connectors
115 Vac 60 Hz (14W) input 6 Vdc
1200 mA output power pack for
use with P/N 538-745
230 Vac 50 Hz (14W) input 6 Vdc
1000 mA output power pack for
use with P/N 538-745E
CAUTION: Use only the plug-in
transformer shipped with this device.
120 Vac transient protected duplex
outlet for 538-745 (not included)
Three 250V Three Metal Oxide
Varistors (MOVs) included with P/N
538-745E
Optional wall mounting kit (7")
Optional rack mounting kit (7")
Required Tools
•
19-inch rack position available if using the
rack mounting kit
•
Small slotted screwdriver
•
Wire cutters or wire strippers
•
7/16-inch (11.1mm) nut driver
Expected Installation Time
15 minutes
Document No. 538-588
Rev. 3, December, 2001
POWER INPUT
538-745 Fiber Optic Hub Power
RECEPTACLE
6Vdc
350 ma
RX4 TX3 RX3 TX2 RX2 TX1 RX1
Operating Temp. 0-50 C (32-122 F)
RECEIVE
PORT
PORT
TRANSMIT
PORT
Product Number
538-745 (115 Vac)
538-745E (230 Vac)
538-746
538-747
529-804
527-969
538-709K
538-717K
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