Black Box RM110A User manual

1000 Park Drive • Lawrence, PA 15055-1018 • 724-746-5500 • Fax [phone]
© Copyright 1997. Black Box Corporation. All rights reserved.

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MARCH 1997
RM110A
RM110A-2PS
RM110AE
Rack Nest 2/14
ON
ON

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TRADEMARKS
TRADEMARKS USED IN THIS MANUAL
All applied-for and registered trademarks are the property of their respective owners.

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RACK NEST 2/14
Connectors — Line: (14) 5-screw, snap-type terminal
blocks; DTE: (14) DB25 female connectors
Number of Slots — 14 slots for cards
Certification — CE
Operating Temperature — 32 to 122°F (0 to 50°C)
Humidity — 10 to 90%, noncondensing
Power — RM110A: 115-VAC (±10%), 47–63 Hz;
RM110A-2PS: (2) 115-VAC power supplies
(one main and one redundant), 47–63 Hz;
RM110AE: 230-VAC (±10%), 47–63 Hz
Size — 7"H x 19"W x 10.4"D
(17.8 x 48.3 x 26.4 cm)
1. Specifications

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RACK NEST 2/14
2.1 Introduction
The Rack Nest 2/14 is a 19-inch, 4U-high rackmount modem card nest. It
accommodates up to fourteen plug-in cards. The Rack Nest 2/14 provides a
reliable concentration point for multiple baseband links supporting last-mile
or campus applications.
Any combination of modem cards can be installed. Cards are hot-swappable,
which means they can be removed or inserted during operation without
interfering with the operation of other cards.
Each power supply supports a full rack of cards, regardless of the type. The
RM110A-2PS comes with two separate power supplies that back up one
another in case of failure. Each power supply is hot-swappable.
The rear panel consists of fourteen 5-screw, snap-type terminal blocks and
fourteen DB25 connectors (one terminal block and one DB25 connector
per card). The terminal blocks connect the transmit and receive lines. The
transmit pair is connected to the terminals marked XMT, the receive pair is
connected to the terminals marked RCV, and an optional ground connection
is the fifth screw. The DB25 connectors are interface connectors, and they
provide all interface signals for the digital interfaces.
2.2 Features
• High-density 19-inch modem rack.
• Any combination of up to 14 modem cards.
• House fiberoptic and copper-wire modems in a single nest.
• Allows hot-swapping of cards and power supplies.
• 2PS model has separate power supplies for full redundancy.
• 4U high.
2. The Rack Nest 2/14

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RACK NEST 2/14
2.3 Installation
First, install the Rack Nest 2/14 into a 19-inch rack. Once it’s installed, you
can insert up to fourteen cards. To secure the cards, tighten the nut on the
top and bottom of each card. Also make sure that the cards are fully inserted
into the edge connector inside the rack.
To operate the power supply, all you need to do is plug in the power supply
and press the operating switch on the rear panel. The ON LED will light to
confirm that it’s receiving power and that the switch is on.