ARRIS TM508 Installation Guide - Manual (Page 12)

2
Touchstone Telephony Release 5 Standard 1.2 Mar 2007
Power Requirements
The Telephony Modem can use either 120V AC power or 48V DC
power. Maximum power consumption is 60 watts.
CAUTION
Risk of equipment damage
Connect only DC or AC power, not both, to the TM512. Connecting
both supplies may cause a reset upon loss of AC power.
Each type of power supply has a separate power connector mounted on
the rear panel of the Telephony Modem. The power connectors are typ-
ically plugged into the AC power or DC power distribution unit of the
rack or cabinet using the power cords supplied with the Telephony
Modem.
Note: Make sure that the power circuits have sufficient capacity to
power the Telephony Modem before connecting power.
AC Powering The Telephony Modem requires up to 85 VA, 47 to 63 Hz AC power.
The socket-outlet must be properly earthed.
DC Powering For DC powering, ARRIS recommends the use of a Local Battery
Backup Supply, part number 718115K. The DC input voltage range is
40 V DC to 60 V DC; the nominal voltage is 48 V DC. The DC power
supply requires up to 60 watts of DC power from a SELV rated source.
If you intend to power the Telephony Modem from a common 48V DC
supply, contact ARRIS for recommendations. The following table
shows the DC power connections.
Signal To AWG Color
DC RTN - 16 Black
48V Feed 1 + 16 Red