Teo PS-50 User Manual

PS-50 ISDN Power Suppl

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Installation

Instructions

The PS-50 is a rack- or wall-mountable bulk
power supply for powering ISDN telephones
and NT1 Network Terminations.

Fifty -48 VDC output connections are
provided. Each output has self-resetting
current limiting protection at 250 mA. The total
available output current is 2.8 A, which is
suitable to power up to 50 Tone Commander
ISDN telephones.

Optional NT1-200 Battery Backup Power Supply and NT1-200 Add-on Battery units can be added to the
PS-50 to enable uninterrupted ISDN power during a power failure.

Specifications

Power Requirements ................ 120 VAC, 60 Hz, single phase, 2 A maximum

Output Voltage .......................... -48 VDC nominal, -56 VDC maximum

Output Current .......................... current limited at 250 mA per output pair, 2.8 A total (50 pairs)

Output Power, Total................... 150 watts

Output Connectors .................... (2) 50-position ribbon cable connectors (Amphenol type)

Short Circuit Protection ............. individual self-resetting current limiting for each output

Available Power for Terminals .. 10 watts maximum per output circuit

2.5 watts average per output circuit with 50 loads
150 watts total maximum

Physical Dimensions ................. 3.5” H x 17.25” W x 4.6” D

Weight ....................................... 4.3 lbs.

Operating Temperature ............. 32° - 122° F (0° - 50° C)

Humidity .................................... 5% to 95%, non-condensing

Contents of Shipping Box

(1) PS-50 Power Supply (4) 10-24 x ¼” mounting bracket screws
(2) Mounting brackets (1) Installation Instructions (this document)

Important Safety Instructions

• This equipment is intended for installation in a restricted access location (dedicated equipment
rooms, equipment closets, or the like) in accordance with Articles 110-16, 110-17, and 110-18
of the National Electrical Code, ANSI/NFPA No. 70.

• Never install telephone wiring during a lightning storm.

• Never install telephone jacks in wet locations unless the jack is specifically designed for wet

locations

• Never touch uninsulated telephone wires or terminals unless the telephone line has been
disconnected at the network interface.

• Use caution when installing or modifying telephone wires.

• Do not mount the PS-50 within 12” of a heat source.

• Do not obstruct the heat vents on the top of the unit.

13-280105 Rev. A

March 2005

Tone Commander PS-50 ISDN Power Supply Installation Instructions

• Do not obstruct the fan on the rear panel of the unit.

• The socket-outlet shall be installed near the equipment and shall be easily accessible.

Mounting

The PS-50 can be mounted in an EIA standard 19” commercial or 23” telco rack, or wall mounted.

19” Rack Mounting

1. Attach the long sides of the mounting brackets to the PS-50 as shown in Figure 1, using the supplied
mounting bracket screws.

2. Mount the PS-50 to the rack standards using suitable fasteners.

Figure 1 – 19” Rack Mounting

23” Rack Mounting

1. Attach the short side of the mounting brackets to the PS-50 as shown in Figure 2, using the supplied
mounting bracket screws.

2. Mount the PS-50 to the rack standards using suitable fasteners.

Figure 2 – 23” Rack Mounting

Page 2 13-280105 Rev. A