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Appendix D: M2317 telephone Page 455 of 504
Telephones and Consoles Description, Installation, and Operation
Logic and other circuitry requiring +5 V is powered from an external,
regulated +5 V DC supply when the data option is not installed. The external
power supply must meet the following specifications:
The external power supply, in all cases where no Asynchronous Data Option
is installed, is connected to the mating connector mounted in the rear of the
M2317 telephone. It covers the area where the RS-232-C interface connector
would be located.
Note: If the Asynchronous Data Option is installed, an external,
multi-output data power supply is required. Refer to NPS50220-03L5.
See “Asynchronous Data Option” on page 423 for more information on
ADO requirements.
The data option power supply connector plugs into the back of the telephone
next to the RS-232-C interface connector. Data option installation requires
the removal of the telephone power supply connector.
The NPS50220-03L5 power supply meets the following specifications:
• AC input voltage: 105 - 132 V AC
• Input line frequency: 57 - 63 Hz
• Operating temperature: 0° to 50°C (32° to 122°F)
• Operating humidity: 5% to 95% non-condensing
• Storage temperature: -40° to 70°C(-40° to 158°F)
Input: 95–129 V AC, 60 Hz
Output: +5 V DC, + or –5%, 300 mA
10 mV maximum RMS ripple
Cord: 2.5 m (8 ft.) of 20 AWG wire mating to a Switchcraft 722A
connector
Case: Wall-mounted, CSA and UL approved.
Operational within 0°C (32°F) and 50°C (122°F)
temperature limits
Impedance: Greater than 10 M¾ to ground