Teo PS-50 ISDN - Manual

13-280105 Rev. A
March 2005
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.
PS-50 ISDN Power Supply
Installation
Instructions