Black Box lt0007a-4u Guia De Especificaciones
1
Connect up to four
workstations to one
Token Ring lobe.
workstations to one
Token Ring lobe.
Reduces cabling and
installation costs.
installation costs.
Models available for
UTP or STP cable.
UTP or STP cable.
Autosenses data rates
of 4 or 16Mbps.
of 4 or 16Mbps.
Wire-fault detection
disconnects from the
ring automatically in
case of shorts, open
circuits, or incorrect
speeds.
disconnects from the
ring automatically in
case of shorts, open
circuits, or incorrect
speeds.
C
onnect two or four token-ring
workstations to a single lobe
workstations to a single lobe
with the Smart Lobe Access Unit.
You save on cabling and
installation costs by adding
workstations to the ring without
adding extra lobe cables to the
central hub.
You save on cabling and
installation costs by adding
workstations to the ring without
adding extra lobe cables to the
central hub.
Three Smart Lobe Access Unit
models are available: 4-port
versions for either ordinary
unshielded twisted-pair (UTP) or
shielded twisted-pair (STP) cable
and a 2-port version for UTP
cable.
versions for either ordinary
unshielded twisted-pair (UTP) or
shielded twisted-pair (STP) cable
and a 2-port version for UTP
cable.
The Smart Lobe Access Units
feature wire-fault detection,
which senses any short, open, or
illegal impedance in the main lobe
connection. If a fault is detected,
the Access Unit deinserts all
connected workstations.
which senses any short, open, or
illegal impedance in the main lobe
connection. If a fault is detected,
the Access Unit deinserts all
connected workstations.
Power the Smart Lobe Access
Unit from an external DC power
adapter via the MAIN connector
(requires 6-wire cabling) or via a
modular power jack.
adapter via the MAIN connector
(requires 6-wire cabling) or via a
modular power jack.
Double or quadruple a
single lobe’s capacity!
Key Features
SMART LOBE ACCESS UNIT
Black Box Corporation • 1000 Park Drive • Lawrence, PA 15055-1018 • Tech Support: 724-746-5500 • www.blackbox.com • e-mail: info@blackbox.com
© 2005. All rights reserved.
Black Box Corporation.
4/1/2005
#19194
Input Voltage: 11 to 35 VDC
(12 VDC typical)
Input Current: 2-Port models:
100 mA @ 12 VDC; 4-Port models:
140 mA @ 12 VDC
140 mA @ 12 VDC
Operating Voltage: 4.5±0.7 volts
Operating Current: 2-Port models:
140 mA @ 5 VDC; 4-Port models:
240 mA @ 5 VDC; Phantom
circuit: 1.0 mA @ 5 VDC
240 mA @ 5 VDC; Phantom
circuit: 1.0 mA @ 5 VDC
Resistance TX to RX: 4.8±0.2 k
Ω
Insertion Time: 5 milliseconds
(typical)
Removal Time: 5 milliseconds
(typical)
Jumper: 4- or 16-Mbps rate
selection (4M/16M)
Compliance: FCC Part A; Complies
with EMC EN 55022 (1994), EN
50082-1 (1992), and EMC
Directive 89/336/EEC
50082-1 (1992), and EMC
Directive 89/336/EEC
Operating Temperature: 32 to 122°F
(0 to 50°C)
Relative Humidity Tolerance:
10 to 90%, noncondensing
Speed: 4 or 16 Mbps, autosensing
Connectors: LT0007A-2U:
(3) unshielded RJ-45;
LT0007A-4U: (5) unshielded
RJ-45;
LT0007A-4SU: (5) shielded RJ-45
Indicators: (3) or (5) Red LEDs,
depending on which model you
have
have
Power: 115- or 230-VAC external DC
power supply (can also be
powered remotely via Pins 7 and
8 of the main connector)
powered remotely via Pins 7 and
8 of the main connector)
Size: 7.3"H x 4.5"W x 1.5"D
(18.5 x 11.4 x 3.8 cm)
Weight: 2 lb (0.9 kg)
Specifications